Operation Manual OM 775-1Group: Controls

Part Number: OM 775-1

Date: November 2004

Supersedes:OM 775-0

© 2004 McQuay International

MicroTech II TM

Multiple Air Handler Controller

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Table of ContentsIntroduction ............................................................................3Software ID .............................................................................4Software Compatibility ............................................................4Getting Started .......................................................................5General Description .................................................................5PC Requirements .....................................................................5 Operating System: ..................................................................5 Other Software: ......................................................................5Connecting to the MAC ...........................................................5Changing Networking Properties .............................................6 Required Tools .......................................................................6 Procedure ...............................................................................6 Network Setting for Microsoft Windows 95 and 98 ..............6 Network Setting for Microsoft Windows NT .........................7 Network Setting for Microsoft Windows 2000 ......................7 Setting the IP address on a new MAC. ...................................8Setting Date and Time ...........................................................10Configuring User Accounts ...................................................10Description of Operation .....................................................14Introduction ...........................................................................14Web User Interface (WebUI) .................................................14Control Strategies ..................................................................15Configuration .........................................................................16Device Addressing .................................................................17Group Assignments ................................................................18Control Strategy Operation ....................................................18Common Outdoor Air Temperature Control ..........................19 MAC Setup ..........................................................................19

Common Control Temperature.............................................. 20 MAC Setup .......................................................................... 20 Unit Controller Setup .......................................................... 21Common Duct Static Pressure Control .................................. 22 MAC Setup .......................................................................... 22 Common Discharge Fan Capacity Setpoint ......................... 24 How Unit Startup Affects Operation ................................... 24 Unit Controller Setup .......................................................... 24PI Control Parameters ............................................................ 24 Sample Time ........................................................................ 24 Proportional Band and Integral Time .................................. 24Adjusting PI Control Parameters ........................................... 25 Correcting System Instability (Hunting) .............................. 25 Correcting System Sluggishness .......................................... 25Group Screens ....................................................................... 25 Viewing Group Data ............................................................ 26Troubleshooting ................................................................... 29Using Status LEDs ................................................................ 29 Ethernet Port ........................................................................ 29 Serial Ports .......................................................................... 29 Heartbeat ............................................................................. 30Application and Network Issues ............................................ 31Determining the Mac’s Network Setting ............................... 32 About the VxWorks Target Shell ........................................ 33Connectivity Troubleshooting Utilities ................................. 35 ipconfig ................................................................................ 35 ping ...................................................................................... 35Index of Procedures............................................................. 37

NoticeMcQuay International reserves the right to change any information contained herein without prior notice. The user isresponsible for determining whether this product is appropriate for his or her application.™ ® The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE,Internet Explorer, Windows NT and Windows from Microsoft Corporation; Niagara Framework and JACE from TridiumInc.; LONMARK from Echelon; HyperTerminal from Hilgraeve Inc.; McQuay, ServiceTools and MicroTech II fromMcQuay International.

Reference DocumentsApplied Rooftop

IM 696 MicroTech II Rooftop ControllerOM 137 MicroTech II Rooftop Discharge Air Control (DAC)OM 138 MicroTech II Rooftop Space Comfort Control (SCC)ED 15060 MicroTech II Protocol Data Packet

Self ContainedIM 710 MicroTech II Vertical Self-Contained System Controller Types SWP and SWTOM 711 MicroTech II Vertical Self-Contained System Controller Types SWP and SWT, Discharge Air Control (DAC)OM 712 MicroTech II Vertical Self-Contained System Controller Types SWP and SWT, Space Comfort Control (SCC)ED 15061 MicroTech II Protocol Data Packet

Multiple Air Handler ControllerIM 769 MicroTech II Multiple Air Handler Controller

OM775-1

IntroductionThe MicroTech IITM Multiple Air Handler Controller (MAC) software consists of a web user interface (WebUI – Web-likepages accessible with Internet Explorer) and multiple-unit control strategies programmed for common control of multipleMicroTech II unit controllers on rooftop or self-contained air-conditioning equipment. The browser based user interface isused to edit control parameters required for multiple-unit control algorithms and to set certain parameters in the MicroTechII unit controllers as necessary for multiple-unit control.The multiple-unit control strategies provide automatic control for groups of MicroTech II controlled equipment connectedto the MicroTech II MAC. The MAC software executes and communicates information using BACnet® between the MACand the associated MicroTech II unit controllers with a Data Link/ Physical Layer MS/TP. The MAC is capable ofcommunicating with a connected building automation system (BAS) using Niagara Framework™ Technology, BACnet®/IP,or BACnet Ethernet in accordance with the communications protocol used by that system.

! WARNING

Electric shock hazard. Can cause personal injury or equipment damage.

This equipment must be properly grounded. Only personnel who are knowledgeable in the operation of the equipmentbeing controlled must perform connections and service to the MicroTech II control panel.

! CAUTION

Static sensitive components. Can cause equipment damage.

Discharge any static electrical charge by touching the bare metal inside the control panel before performing anyservice work. Never unplug cables, circuit board terminal blocks, or power plugs while power is applied to the panel.

NOTICE

This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordancewith this instruction manual, may cause interference to radio communications. It has been tested and found to complywith the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to providereasonable protection against harmful interference when the equipment is operated in a commercial environment.Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will berequired to correct the interference at his or her own expense. McQuay International disclaims any liabilityresulting from any interference or for the correction thereof.

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Software IDMicroTech II MAC controller software is factory installed and tested in each panel prior to shipment. The software isidentified by a program code (also referred to as the "Ident"), which is printed on a small label above the controller. MACcontroller program codification is as follows:

MTII-UC-0-MAC 01. 0MicroTech II

Universal Controller

Hardware Version (numeric)

Controller Type

Software Version (numeric)

Version revision (zero then alphabetical)

The program code is also available for display on the MAC Configuration Screen.

Software CompatibilityAt the time of this writing, the program code for MAC Panel software is MTII-UC-0-MAC01.0.This version is only compatible with MicroTech II applied rooftop and self-contained units. It is not compatible withprevious generation rooftop and self-contained MicroTech unit controllers.

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Getting Started

General DescriptionThe MAC controls up to four MicroTech II unit controllers assigned to one multiple-unit control group with the capabilityfor up to four separate multiple-unit control groups (maximum of 8 unit controllers in total). Each unit controller may beassigned to only one multiple-unit control group at a time. The MAC provides three control strategies; 1) Common OutdoorAir Temperature, 2) Common Control Temperature, 3) Common Duct Static Pressure Control.

The Common Outdoor Air Temperature strategy provides the same Outdoor Air Temperature value to each unit controllerto promote consistent operation across unit controllers.

The Common Control Temperature strategy provides that unit controllers use the same Control Temperature to eliminate thepossibility of simultaneously heating and cooling the space. This strategy should be used for applications in which 1)multiple Constant Air Volume (CAV) units feed a common space or 2) multiple Variable Air Volume (VAV) units feed acommon supply duct (the Common Duct Static Pressure Control strategy should be used in conjunction with this strategy).

The Common Duct Static Pressure Control strategy has discharge fans modulate in unison across VAV unit controllers toeliminate the hunting that may otherwise occur. This feature should be used for applications in which multiple VAV unitsfeed a common supply duct (the Common Control Temperature strategy should be used in conjunction with this strategy).

PC RequirementsOperating System:Note: In the event that you would need to load a new application or license file, or modify host user names and

passwords, you will need Microsoft Windows NT™ 4.0 with Service Pack 4 or higher, Windows 2000 orWindows XP.

Other Software:The MAC user interface works from your Microsoft Internet Explorer™ browser version 5.0 or later only (not AOL orNetscape). The MAC requires a Java-enabled Web browser – the typical default configuration for most browsers. ForInternet Explorer, the following parameters have proven to be most essential (version 5.5 parameters shown):From the Internet Explorer’s menu bar: Tools > Internet Options > Advanced

• "HTTP 1.1 Settings": Use HTTP 1.1

• "Microsoft VM": JIT compiler for virtual machine enabled.

Adobe Acrobat Reader 5.0 is needed to view the help documentation.Display: Video card and monitor capable of displaying 1024x768 pixel resolution.Network support: Ethernet adapter (10/100 megabit with RJ45 connector)

Connecting to the MACThese instructions assume that you have a PC installed with Internet Explorer.Once the MAC has powered up, you should connect to it with Internet Explorer to assign it a unique IP address and othernetwork settings to be used for communications. In addition, you must set current host date, time, and time zone since theMAC is shipped with the battery disconnected.The MAC controller is pre-configured with an IP address in the range 192.168.1.14x, and a default subnet mask of255.255.255.0.

Note: The IP address is listed on the packing slip that accompanies the unit. Make sure the PC that you use to access theMAC during installation is assigned an address in the range: 192.168.1.1 to 192.168.1.254, with a subnet mask of255.255.255.0.

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Changing Networking PropertiesRequired ToolsYou need the following tools to configure the MAC for network operation.

• PC with Ethernet card and TCP/IP protocol.• ΙInternet Explorer browser.• Ethernet Cable. (Either an Ethernet crossover cable for direct connection or a standard Ethernet cable for

connecting through a hub.)ProcedureThe procedure for changing the network settings varies depending on the operating system in your computer.You must access the MAC at its IP address using your Internet Explorer browser. The browser will allow you to changeoperating system parameters in the MAC including editing host name, TCP/IP networking properties, and setting time, dateand time zone. The reboot function allows you to restart the MAC remotely to implement changes.In order to access the MAC, your computer must be on the same subnet as the MAC. First change the network settings onyour computer, access the Niagara Web Administration page in the MAC to change the network settings and set the dateand time, and finally change the network settings of your computer back to the way they were before the configurationprocess.

Network Setting for Microsoft Windows 95 and 98Procedure 1: To change the network setting in Microsoft Windows 95 and 98 computers.1. Open the Control Panel on your computer.

a. Open the Network Applet.

b. Select the TCP/IP-Ethernet card combination on the computer.

c. Select the Properties button.

d. Select the IP Address tab.

e. Note the IP address and Subnet mask if they have values or that Obtain IP address automatically is selected.

f. Select Specify an IP address.

g. Change the Subnet mask to the same Subnet mask in the MAC. The default Subnet mask is 255.255.255.0.

h. Change the IP address to X.X.X.X (where X.X.X.X is unique on the subnet).

i. Click the OK button.

2. Reboot your computer to change the Subnet Mask and IP address.

Procedure 2: To restore the network setting in Microsoft Windows 95 and 98 computers.1. Open the Control Panel on your computer.

a. Open the Network Applet.

b. Select the TCP/IP-Ethernet card combination on the computer.

c. Select the Properties button.

d. Select the IP Address tab.

e. Restore the settings noted as previously noted.

f. Click the OK button.

2. Reboot your computer to restore the original Subnet Mask and IP address.

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Network Setting for Microsoft Windows NTProcedure 3: To change the network settings in a Microsoft Windows NT computer1. Open the Control Panel on your computer.

a. Open the Network Applet.

b. Select the Protocols tab.

c. Select the TCP/IP-Ethernet card combination on the computer.

d. Select the Properties button.

e. Select the appropriate adapter.

f. Note the IP address and Subnet mask if they have values or that Obtain IP address automatically is selected.

g. Select Specify an IP address.

h. Change the Subnet mask to the same Subnet mask in the MAC. The default Subnet mask is 255.255.255.0.

i. Change the IP address to X.X.X.X (where X.X.X.X is unique on the subnet).

j. Click the Apply button.

Procedure 4: To restore the network settings in a Microsoft Windows NT computer.1. Open the Control Panel on your computer.

a. Open the Network Applet.

b. Select the Protocols tab.

c. Select the TCP/IP-Ethernet card combination on the computer.

d. Select the Properties button.

e. Select the appropriate adapter.

f. Restore the settings as previously noted.

g. Click the Apply button.

Network Setting for Microsoft Windows 2000Procedure 5: To change the network settings in a Microsoft Windows 2000 computer1. Select My Network Places on the desktop and right click.

a. Open Properties.

b. Select Local Area Connections and right click.

c. Open Properties.

d. Select TCP/IP.

e. Click Properties button.

f. Note settings for future reference.

g. Select Use the following IP address.

h. Change the Subnet mask to the same Subnet mask in the MAC. The default Subnet mask is 255.255.255.0.

i. Change the IP address to X.X.X.X (where X.X.X.X is unique on the subnet).

j. Click OK.

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Procedure 6: To restore the network settings in a Microsoft Windows 2000 computer1. Select My Network Places on the desktop and right click.

a. Open Properties.

b. Select Local Area Connections and right click.

c. Open Properties.

d. Select TCP/IP.

e. Restore the network settings as previously noted.

f. Click OK.

The Niagara Web Administration table provides access to the selected host’s networking properties, including host nameand the TCP/IP properties listed below (each property must be obtained from your Network Administrator). Use the Applybutton to store any changes you make (note that changes are not effective until the host is rebooted). The Reload buttonrestores changes since the last Apply.

• Host Name—The name you want to use for this host.• DNS Domain—The TCP/IP Domain Name System (DNS) domain this host belongs to, if used.• IP Address—The unique Internet Protocol (IP) address for this host.• Subnet Mask—The IP subnet mask used by this host.• Default Gateway—The IP address for the device that forwards packets to other networks or subnets.• DNS Servers—The IP address for one or more DNS servers, each of which can automate associations between host

names and IP addresses.• Enable DHCP—Makes the MAC request an IP address from a DHCP Server. Only enable DHCP if your network

assigns IP addresses dynamically. If so, you will have to manually reset the IP address entry using this Niagara WebAdministration table each time the MAC is rebooted.

Note: If you specify a DNS server, you must provide a domain name for this host in the DNS Domain field. Otherwise,the DNS function will not work.

Use the following procedure to change the network settings of the new MAC.

Setting the IP address on a new MAC.Procedure 7: Setting the IP address on a new MACStep 1. If not already installed, install Internet Explorer on your PC.Step 2. Attach one end of a standard Category-5 Ethernet unshielded twisted pair (UTP) patch cable to the Ethernet port on

the MAC.Step 3. Attach the other end of the patch cable to a network port or directly to an Ethernet hub.

Note: If you do not have access to a hub, use an Ethernet crossover cable to connect the MAC controller directly to thenetwork connection on your PC.

Step 4. Power up the MAC.Step 5. Assign the IP address of your PC in the range of 192.168.1.1 to 192.168.1.254; however, do not duplicate the IP

address already assigned the MAC or another host on the LAN. (See Network Settings for Microsoft Windows.)Step 6. From your PC, start Internet Explorer.Step 7. In the address bar type http: // < IP Address>: 3011/rel/nre/webadmin/webadmin.html where <IP Address> is

the IP Address of the MAC. An Enter Network Password dialog box is displayed.

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Figure 1. Enter Network Password

Step 8. Log on to the MAC controller with the default user name and password, as it appears on the packing list. Typicaldefaults are: user name = McQuay and password = Password. Click OK. The MAC controller (IP address)appears in the Network Setting Section of the Niagara Web Administration table.

Figure 2. Niagara Web Administration

Step 9. Assign the MAC a unique IP address and other network settings to be used for communications, as describedabove.

Note: Once you have made changes to one or more network settings, you must click Apply and then Reboot for the hostfor those changes to be implemented.

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Step 10. Click Apply and then Reboot to implement your changes. The MAC is now accessible using the IP address youassigned it (and not the default IP address.)

! WARNING

After changing network settings, be sure to record the changes and save them in a safe location. We recommend alsowriting it on the label provided on the inside front cover of the MAC panel in order to avoid a lengthy recoveryprocedure if the network settings are lost.

Note: Verify that you do not change the IP to an illegal IP address such as xx.xx.xx.255 or 224.xx.xx.xx or higher.

Setting Date and TimeTo change the MAC’s system time, date, and time zone, access the address http://<IP Address ofMAC>:3011/rel/nre/webadmin/ webadmin.html. (See Procedure 7, Steps 1 through 8 for information on how to connect tothis page.) To change the settings, click on the information you want to change and type the new information in the SystemTime section of the Niagara Web Administration table. Changes you make to these settings become immediately effectivein the MAC.

Configuring User AccountsUser Admin allows the System Administrator or Security Administrator to set-up, alter, and view users allowed access intothe MAC. Only a user with System Administrator or Security Administrator privileges can access this function. Personswith different levels of authorization have defined selected functions for use. This is to protect against unauthorizedchanges. A maximum number of 255 users can be defined at one time.

Table 1: Default Passwords

User Name Password Category DescriptionMcQuay Password System Administrator This allows full read/write capability plus full administration

privileges.User User User This allows read-only and no administration privileges.Operator Operator Operator This allows read/write capability and no administration privileges.

Figure 3. User Admin Screen

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Figure 4. Configuration Screen: Logged on as Use

Figure 5. Configuration Screen: Logged on as Operator

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Figure 6. Configuration Screen: Logged on as System or Security Administrator

Table 2: User Admin

Full NameA descriptive field that describes the person or persons that will be given this particular User Nameand Password. The characters must be alphanumeric or underscores and must start with an alphacharacter.

User Name User Name used to log onto the MAC configuration and group screens.Enter (Password) The password used to log onto the MAC configuration and group screens.

Confirm (Password) Re-enter the password that was entered in the Enter password column. This makes sure you didn'tmake any typing mistakes.

Category

In this column you will select the type of privileges you want this user to have.None - No User Name or Password has been defined.System Administrator - This allows full read/write capability plus full administrative privileges,including changing user names and passwords.Security Administrator - This allows the same capability as the System Administrator except thisuser cannot change the user name or password for the System Administrator.User - This allows read-only capability and no administrative privileges.Operator - This allows read/write capability and no administrative privileges.Remove User - Selecting this and pressing the Save Changes button removes the correspondinguser from the list of all users.

Procedure 8: Adding a new User Account and Password.Step 1. Connect your PC to the MAC if you have not already done so. (See Procedure 7, Steps 1 – 5)Step 2. From your PC, start Internet Explorer.Step 3. In the address bar type http://<IPaddress> where <IPaddress> is the IP address of the MAC. An Enter Network

Password dialog box is displayed.Step 4. Log on to the MAC controller using the System or Security Administrator User Name and Password.Step 5. The main screen should now be displayed. Select Configuration to navigate to the configuration screen and click

on the User Admin button.

Step 6. Fill in the data for the new user in the row where the Full Name and User Name are marked with ("*").Step 7. Press the Save Changes button.

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Procedure 9: Removing a User Account and PasswordStep 1. Connect your PC to the MAC if you have not already done so. (See Procedure 7, Steps 1 – 5)Step 2. From your PC, start Internet Explorer.Step 3. In the address bar type http://<IPaddress> where <IPaddress> is the IP address of the MAC. An Enter Network

Password dialog box is displayed.Step 4. Log on to the MAC controller using the System or Security Administrator User Name and PasswordStep 5. The main screen should now be displayed. Select Configuration to navigate to the configuration screen and click

on the User Admin button.Step 6. Select "Remove User" in the Category column of the row corresponding to the user you want to delete.

! WARNING

If you delete the default System Administrator account and create a new one, be sure to record your changes andstore them in a place you (and your colleagues) can find them again. If you forget or lose the name or password, youmust ship the unit back for recovery.

Step 7. Press the Save Changes button.

Procedure 10: Creating a new password for an already existing User.Step 1. Connect your PC to the MAC if you have not already done so. (See Procedure 1, Steps 1 – 5)Step 2. From your PC, start Internet Explorer.Step 3. In the address bar type http://<IPaddress> where <IPaddress> is the IP address of the MAC. An Enter Network

Password dialog box is displayed.Step 4. Log on to the MAC controller using the System or Security Administrator User Name and PasswordStep 5. The main screen should now be displayed. Select Configuration to navigate to the configuration screen and click

on the User Admin button.Step 6. In the Password section of the table, enter the new password and confirm it in the row corresponding to the user

you want to assign the new password to.

! WARNING

If you change the default System Administrator password, be sure to record your changes and store them in a placeyou (and your colleagues) can find them again. If you forget or lose the name or password, you must ship the unitback for recovery.

Step 7.Press the Save Changes button.

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Description of Operation

IntroductionThe MicroTech IITM Multiple Air Handler Controller (MAC) software consists of a web user interface (WebUI – Web-likepages accessible with Internet Explorer) and multiple-unit control strategies programmed for common control of multipleMicroTech II unit controllers on rooftop or self-contained air-conditioning equipment. The browser based user interface isused to edit control parameters required for multiple-unit control algorithms and to set certain parameters in the MicroTechII unit controllers as necessary for multiple-unit control.The multiple-unit control strategies provide automatic control for groups of MicroTech II controlled equipment connectedto the MicroTech II MAC. The MAC software executes and communicates information using BACnet® between the MACand the associated MicroTech II unit controllers with a Data Link/Physical Layer MS/TP. The MAC is capable ofcommunicating with a connected building automation system (BAS) using Niagara Framework™ Technology, BACnet®/IPor BACnet Ethernet in accordance with the communications protocol used by that system

Web User Interface (WebUI)The Web User Interface (WebUI) will provide the capability to edit control parameters shown in the MAC setup tablesthroughout this manual.

Procedure 11: How to Open the WebUIStep 1. Connect your PC to the MAC if you have not already done so. (See Procedure 7, Steps 1 – 5)Step 2. From your PC, start Internet Explorer.Step 3. In the address bar type http://<IPaddress> where <IPaddress> is the IP Address of the MAC. An Enter Network

Password dialog box is displayed.

Figure 7. Enter Network Password

Step 4. Log on to the MAC controller using your user defined passwords. (See Configuring Host User Accounts for moreinformation)

Step 5. The main screen should now be displayed. Select Configuration to navigate to the configuration screens to set upthe MAC or Group Screens to view live data from already grouped units.

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Figure 8. Main Screen

Control StrategiesThe MAC will provide control of up to four MicroTech II unit controllers assigned to one multiple-unit control group withthe capability for up to four separate multiple-unit control groups (maximum of 8 unit controllers in total). Each unitcontroller may be assigned to only one multiple-unit control group at a time. The MAC provides three control strategies; 1)Common Outdoor Air Temperature, 2) Common Control Temperature and 3) Common Duct Static Pressure Control.1) The Common Outdoor Air Temperature strategy provides the same Outdoor Air Temperature value to each unit

controller to promote consistent operation across unit controllers.2) The Common Control Temperature strategy provides that unit controllers use the same Control Temperature to

eliminate the possibility of simultaneously heating and cooling the space. This strategy should be used for applicationsin which 1) multiple CAV units feed a common space or 2) multiple VAV units feed a common supply duct (theCommon Duct Static Pressure Control strategy should be used in conjunction with this strategy).

3) The Common Duct Static Pressure Control strategy has discharge fans modulate in unison across VAV unit controllersto eliminate the hunting that may otherwise occur. This feature should be used for applications in which multiple VAVunits feed a common supply duct (the Common Control Temperature strategy should be used in conjunction with thisstrategy).

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ConfigurationThe configuration page allows you to set the network parameters needed to allow the MAC to communicate with theMicroTech II units. You need to set such things as the MAC’s Instance Number, MS/TP Address, Port Configuration, etc.(Reference the table below for a description of items.)

Figure 9. Configuration Screen

Table 3: General Configuration

Instance Number Device Instance Number of the MAC. This must be unique on the BACnet network.Poll Cycle Time (ms) This is the interval in milliseconds at which the MAC will try to begin a complete cycle through all

devices on the MS/TP trunk.Device Status PingDelay (ms)

To monitor the status of MS/TP devices, the driver constantly performs a sequential status check tosee whether the devices are communicating with the MAC. This is the delay time between individualdevice checks, i.e., check device 1, delay, check device 2, delay, etc.

Table 4: BACnet/IP Configuration

Enable (BAS only) Setting this value to Yes enables the Ethernet port for BACnet/IP communications. If there is no BAS(Building Automation System), this variable should be set to No.

Network Number The Network Number must be unique for each BACnet network segment. All BACnet/IP devices onall BACnet/IP segments must have the same BACnet/IP Network Number.

Subnet Mask A subnet mask is a 32-bit number, written in dotted decimal form. Only hosts that are on the samesubnet can communicate with others without a router.

UDP Port The UDP (User Datagram Protocol) port number is used by the client or server device for sending orreceiving messages. Taken together with a network address (IP address), a port number identifiesboth a device and also a "channel" within that device where network communication will take place.

BACnet IP DeviceType

Set this variable to bbmd if the MAC is functioning as the BACnet Broadcast Management Device(BBMD). A BBMD device receives and redistributes broadcast-type BACnet messages (Who-Is, I-Am, etc.) to other BACnet/IP devices on its own subnet, and sends broadcast-type messages toBBMDs on other subnets. If another device on this subnet is defined as the BBMD, set this variableto none.

Remote BBMDAddress

If the MAC is on the same subnet as the BBMD or if the BACnet IP Device Type is none, leave thisproperty at its default (null). Otherwise, specify the address of the remote BBMD on the BACnet/IPnetwork. The required format is in all hexadecimal with colons: xx:xx:xx:xx:yy:yy where xx:xx:xx:xx isthe IP address and yy:yy is the UDP port.

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Table 5: BACnet® MS/TP Configuration

Enabled Must be set to Yes to enable BACnet MS/TP communications from the MAC to the MicroTech II unitcontrollers.

Network Number This must be set to the same value as the MS/TP network number in the MicroTech II unitcontrollers.

Address This is the MAC’s MS/TP address. It must be unique on the network. We recommend setting thisaddress greater than the MS/TP address of the MicroTech II rooftop and self-contained units.

Comm Port The comm port, on the MAC, where the MicroTech II unit controllers are plugged into. Default isComm 5.

Baud Rate This is the MS/TP network baud rate. The default in the MicroTech II controllers is 19200.Max Master Devices This parameter specifies the highest allowable address for master nodes. Set this value equal to the

highest MS/TP address on the network. For example, if your network consists of four MicroTech IIrooftop units that have corresponding MS/TP addresses 1 through 4, and a MAC with an MS/TPaddress of 5, then set Max Master devises to 5.

Max Info Frames This value specifies the maximum number of information frames the node may send before it mustpass the token.

Table 6: BACnet Ethernet Configuration

Enable (BAS only) Setting this to Yes enables the Ethernet port for BACnet Ethernet Communications. If there is noBAS, this variable should be set to No.

Network Number This is the Network Number for the BACnet Ethernet Network.

Device AddressingBefore you can assign your groups, you must set up your controller list. The MAC can communicate with a maximum of 8MicroTech II rooftop and/or self-contained unit controllers. You must know the unit controller type, MS/TP address anddevice instance for each controller in order to complete this step. (Reference the table below for a description of items)

Figure 10. Device Addressing Screen

Table 7: Device Addressing

Name This is the name of the device. These names are used by the MAC only and will not be written to theactual MicroTech II unit controllers. The name must be alphanumeric and can contain underscores.Each name must be unique.

Type* The type of MicroTech II controller, either Rooftop or Self-Contained, that is connected.MS/TP Address This address should correspond with the address on the MicroTech II unit controller's BACnet MS/TP

card. These addresses must be unique in the BACnet network.Device Instance This Device Instance must be set equal to the device instance number of the MicroTech II controller

you are defining. It must be unique in the BACnet network.* A value of N/A means that the unit controller does not exist.

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Group AssignmentsThis page allows you to assign unit controllers to multiple-unit groups. A unit controller is assigned to a multiple-unitcontrol group by selecting the unit Name, which was defined on the Device Addressing page, in the appropriate group table.A value of N/A, for a unit Name in the group means that unit controller does not exist in that group. A unit that is definedon the Device Addressing page and not assigned in a group on this page will operate stand-alone. You will only be able toassign a unit to one multiple-unit group. Any attempts to assign a unit to more than one group will result in an error. Thereis a maximum of 4 units per group.

Figure 11. Group Assignment Screen

Control Strategy OperationFor all control strategies, values of relevant variables are read by the MAC from the unit controllers in each multiple-unitcontrol group via BACnet and values are written to unit controllers in the multiple-unit control group via BACnet with aBACnet priority of 7 if the relevant property is commandable.

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Common Outdoor Air Temperature ControlThe Common Outdoor Air Temperature control strategy operates in the following manner:When a Source Unit is selected as described below, the value of the Outdoor Air Temperature input object is read from theSource Unit. The Outdoor Air Temperature input object in all other unit controllers in the multiple-unit control group istaken "out of service" and the value read from the Source Unit is written to the Outdoor Air Temperature input object for allother unit controllers in the multiple-unit control group. The Outdoor Air Temperature input object in the Source Unit is nottaken "out of service," and the value is not written back to the Source Unit. When a Source Unit is not selected becauseonly one or no unit controller is operating or the most recent Source Unit has been deselected for any reason, the OutdoorTemperature input object for all unit controllers in the multiple-unit control group is to be placed "in service" so that thelocal value of Outdoor Air Temperature can be used for control until a new Source Unit is selected.The value of the Outdoor Air Temperature is read by the MAC from one Source Unit in each multiple-unit control groupand this value is written to the other unit controllers in the multiple-unit control group—but not to the Source Unit fromwhich it was read. All unit controllers in a multiple-unit control group then use the common value for control functions thatuse the variable. Writing an outdoor air temperature value is accomplished by first taking the appropriate input object "outof service" and then writing the group value to it.The Source Unit for this control strategy is selected from among the unit controllers in each multiple-unit control group thathave the temperature variable available. A temperature in a unit controller is not available if the MAC is notcommunicating with that unit controller or if the sensor for that unit controller is in alarm (e.g., shorted or open). In eachmultiple-unit control group, Source Units are not selected for that multiple-unit control group if the feature is disabled forthat group. As described in the following sections, all unit controllers in each multiple-unit control group use the valuesfrom local sensors attached when no Source Unit is selected.A priority (not to be confused with BACnet priorities) from one to four is assigned to each unit controller in each multiple-unit control group with one being the highest priority and four being the lowest priority. Each priority may only be usedonce for each multiple-unit control group.When only one, or no unit controller in a multiple-unit control group has its Discharge Fan on, a Source Unit is not selectedfor this control strategy. No values are written to any unit controllers in a multiple-unit control group when a Source Unit isnot selected, and all unit controllers use the values from local sensors attached for control.A new Source Unit is selected for this control strategy within each multiple-unit control group when the Discharge Fan on asecond unit in a multiple-unit control group has been on for at least 60 seconds and the associated variable is available fromat least one operating unit. In this situation, the Source Unit is the highest priority unit controller that has its Discharge Fanon and the outdoor air temperature available. The Source Unit may be a third or fourth unit controller that has beenoperating for less than 60 seconds. (If all unit controllers are turned on at approximately the same time as they should be,all operating unit controllers will be in the Recirculation state when the Source Unit is selected, and therefore, decisionsabout whether to go into heating or cooling will not yet have been made.)Once a Source Unit has been selected, that unit controller will remain the Source Unit until the unit controller commandsthe unit off, the outdoor air temperature sensor becomes unavailable or the number of operating unit controllers drops to oneor zero. At that time, the current Source Unit will be deselected. If more than one unit controller again begins to operate, anew Source Unit will be selected. When a Source Unit is deselected, all unit controllers in the multiple-unit control groupwill revert to using local sensors. This is accomplished by placing the outdoor air temperature sensor object back "inservice". After all operating unit controllers in the multiple-unit control group have reverted to using local sensors, a newSource Unit will be selected if more than one unit controller is operating. If only one unit in the multiple-unit control groupis operating, a new Source Unit will not be selected.

MAC SetupSetting up the common OAT control feature includes two basic steps. First, to enable the feature, set the Enable variable forthe appropriate group to Yes. (To disable it, set Enable to No.) Secondly, assign a priority of 1, 2, 3 or 4 to each unitcontroller in a group with 1 being the highest priority and 4 being the lowest. Each priority may only be used once in eachgroup.

20 OM775-1

Figure 12. Common OAT Control Screen

Table 8: Common OAT Control

Enable Setting this value to Yes enables the common outdoor air temperature control feature. Setting this valueto No disables it.

Priority If Enable is set to Yes, a priority must be given to each unit in the group with one being the highestpriority and four being the lowest. Each priority may only be used once within each group.

Common Control TemperatureTo eliminate the possibility of simultaneously heating and cooling a space, two or more unit controllers in a multiple-unitgroup must operate using the same Control Temperature and have several of their heat/cool changeover parameters setidentically.The MAC ensures this happens by 1) reading a temperature value from each unit controller in a multiple-unit control group,2) conditioning these values with a minimum, averaging or maximum function, and 3) distributing the resulting controltemperature to each unit controller in the multiple-unit control group.Either "Space" or "Return" may be selected as the Common Control Temperature for a multiple-unit control group.

MAC SetupWhen "Space" or "Return" is selected as the Common Control Temperature for a multiple-unit control group, the value ofthe appropriate temperature is read from each controller in that multiple-unit control group that has that variable available.A variable in a unit controller is not available if the MAC is not communicating with that unit controller or if the associatedsensor for that unit controller is in alarm (e.g., shorted or open).The Common Control Temperature Calculation Method (Minimum, Average, or Maximum) will define the type ofconditioning to be used on the values obtained from each unit controller in the multiple-unit control group.

Note: Control temperature is calculated only from running units. Control temperature is written to all units, even unitsthat are off.

OM775-1 21

The conditioned value of the control temperature for a multiple-unit control group will be written to the ControlTemperature object of each unit in that multiple-unit control group at a BACnet priority of 7. The Control Temperatureobject of each unit will be released at a priority of 7 whenever the Common Control Temperature is not to be used. TheCommon Control Temperature is not to be used when:1. The Common Control Method is changed from "Return" or "Space" to "No."2. The selected Common Control temperature Source is not available from any unit in the multiple-unit control group.3. The number of units operating in the multiple-unit control group is one or zero.When "Space" or "Return" is selected as the Common Control Temperature for a multiple-unit control group, the OccupiedZone Setpoints for that multiple-unit control group shown in the figure below are to be written to all unit controllers in thatmultiple-unit control group.

Figure 13. Common Control Temp Control

Table 9: Common Control Temp Control

Source This feature is disabled if Source is set to No. Otherwise the feature is enabled and usesthe specified temperature

Calculation Method This value tells the MAC which method to use when calculating the group common controltemperature. Select either Minimum

Occupied Cooling Setpoint (°F) If Source is not set to No, this Occupied Cooling Setpoint is written to all units in thegroup.

Occupied Heating Setpoint (°F) If Source is not set to No, this Occupied Heating Setpoint is written to all units in thegroup.

Unit Controller SetupWhen "Space" or "Return" is selected as the Common Control Temperature, the items listed in the table below must be setto common values via the keypad or with McQuay ServiceTools™ because these parameters are not available via standardBACnet objects. All values may be set to any value as long as each value is the same for all unit controllers in the multiple-unit control group.

22 OM775-1

The default values are shown in Table 10 below.

Table 10: Parameters To Be Set In Unit Controllers

Common Control Temperature Unit ParametersKeypad Menu/Item Zone Control DAT Control

Zone Cooling / Clg Deadband= 2°F 2°FZone Heating / Htg Deadband= 2°F 2°FZone Temp Setup / Period 60 Seconds N/AZone Temp Setup / Clg Propbd= 10°F N/AZone Temp Setup / Htg Propbd= 10°F N/AZone Temp Setup / Clg Int Time= 60 Seconds N/AZone Temp Setup / Htg Int Time= 60 Seconds N/A

Common Duct Static Pressure ControlWhen two or more VAV units feed a common supply duct, their Discharge Fan air volumes must modulate in unison tomaintain a common duct static pressure setpoint.The MAC ensures this happens by 1) reading the duct static pressure value from each unit controller in a multiple-unitcontrol group, 2) conditioning these values with a minimum or averaging function, 3) calculating a common airflow setpointby comparing the resulting pressure value and the common duct static pressure setpoint and 4) distributing the resultingairflow setpoint to each unit controller in the multiple-unit control group.The MAC will only use the pressure sensor values from operational controllers in any multiple-unit control group.

MAC SetupCommon Duct Static Pressure SetpointThe Common Duct Static Pressure Setpoint defines the common duct static pressure setpoint for the multiple-unit controlgroup.Common Duct Static Pressure Calculation MethodThe Common Duct Static Pressure Calculation Method (Minimum or Average) will define the type of conditioning to beused on the values obtained from each unit controller in the multiple-unit control group.

OM775-1 23

Figure 14. Common Duct Static Pressure Control Screen

Table 11: Common Duct Static Pressure Control Screen

Enable Setting this value to Yes enables the common duct static pressure control feature. Setting thisvalue to No disables it.

Minimum DischargeFan Capacity (%)*

This is the minimum discharge fan capacity value that is sent from the MAC to the MicroTech IIcontrollers when Enable is set to Yes.

Calculation Method This value tells the MAC which method to use when calculating the group common duct staticpressure. Select either Minimum or Average.

Static PressureSetpoint ("WC)

This value sets the group duct static pressure setpoint used for controlling the discharge air faninlet vanes or VFD. The inlet vanes or VFD is modulated to maintain the duct static pressuresensor input at this setpoint.

Deadband ("WC) This value sets a group deadband around the Static Pressure Setpoint. No duct static pressurecontrol action is taken when the current group duct static pressure is within this deadband aroundthe Static Pressure Setpoint.

Sample Time (sec) This value sets the "sampling period" used in the PID control function that modulates the dischargeair fan inlet vanes or VFD. In general, increasing this value has a slowing effect and decreasingthis value has a speeding effect on the control of the discharge fan inlet vanes or VFD.

Prop Band ("WC) This value sets the "proportional band" used in the PID control function that modulates thedischarge air fan inlet vanes or VFD. In general, increasing this value has a slowing effect anddecreasing this value has a speeding effect on the control of the discharge fan inlet vanes or VFD.

Integral Time (sec) This value varies the "integral time" used in the PID control function that modulates the dischargeair fan inlet vanes or VFD. In general, increasing this value has a slowing effect and decreasingthis value has a speeding effect on the control of the discharge fan inlet vanes or VFD.

*The Minimum Discharge Fan Capacity should not be set less than 17% for units with inlet vanes or less then 25% for units with variable frequency drives.

24 OM775-1

Common Discharge Fan Capacity SetpointThe Common Discharge Fan Capacity Setpoint is the common fan capacity setpoint that is distributed to each unit controllerin the multiple-unit control group.When the Duct Static Pressure Control strategy is selected, the calculated percentage value is written to the Capacity Signalin the unit controllers.To calculate the Common Discharge Fan Capacity Setpoint, the MAC uses four Proportional-Integral (PI) parameters thatare dedicated to duct static pressure control for each multiple-unit control group.ExampleAssume Group 1 contains two unit controllers; one with a 1.00"WC duct static pressure reading and one with a 1.25"WCduct static pressure reading. If the Group 1 Duct Static Pressure Setpoint is 1.20"WC and the Group 1 Duct Static PressureCalculation Method is "Minimum," the Group 1 Discharge Fan Capacity Setpoint used by both unit controllers will be risingsince the MAC uses the 1.00"WC (minimum) reading in its control process.

How Unit Startup Affects OperationWhen one or more unit controllers are operating and another unit is started, a high pressure condition will occur if thecapacity signal sent to the operating fans is not changed. To minimize such over-pressurization effects, the fan capacitysignal sent to unit controllers is reduced to a minimum value when another unit in the same multiple-unit control groupstarts.When the Discharge Fan is operating in one or more unit controllers in a multiple-unit control group and the Unit Statuschanges to Startup for another unit in that multiple-unit control group, a startup sequence is initiated for that multiple-unitcontrol group. The value of the Capacity Signal, identified above, is set to the Minimum Discharge Fan Capacity Setpoint,Default = 25%. Cooling and Heating are disabled by setting the Application Mode to Fan Only.The outdoor air dampers are driven closed by setting the Outdoor Air Minimum Position to zero.

Unit Controller SetupThe Discharge Fan Capacity Control item, DF CapCtrl in the Unit Configuration Menu, must be set to "Position" via thekeypad in any VAV unit that uses Common Duct Static Pressure Control. The MAC does not read, write or check thissetting.

PI Control ParametersAssociated with each modulating output device, there is a set of three adjustable PI control parameters. These are theSample Time, Proportional Band and Integral Time.Since the factory settings for these parameters should provide the best control action, field changes to these parameters arenot recommended. If problems arise, these parameters should first be set back to the factory settings if they have beenchanged in the field. If adjustment is then required, caution must be used since parameters grossly out of adjustment cancause erratic unit operation and possible equipment damage. Changes should be made in small increments and to only oneparameter at a time. After each change, the system should be allowed ample time to stabilize before making furtherchanges. Refer to the following sections for guidelines regarding how the specific parameters affect the control action ofthe PI algorithm.

Sample TimeUnless grossly misadjusted, changing the Sample Time parameter generally will have little effect on the PI control action.If the Period is set too long, loss of system control will likely occur. If the Period is set too short, dramatic system huntingwill likely occur. When in doubt, this parameter should be set to the factory default setting.

Proportional Band and Integral TimeThe Proportional Band and the Integral Time parameters have a similar effect on the PI control action. Increasing either theProportional Band or the Integral Time will have a slowing effect on the control action. Decreasing either the ProportionalBand or the Integral Time will have a speeding effect on the control action. Increasing or decreasing both parameters at thesame time will have a more dramatic slowing or speeding effect. Increasing one while decreasing the other will tend tohave countering effects on the control action. Therefore, it becomes necessary to slow down or speed the control action,these two parameter should generally not both be changed at the same time. One parameter should remain unchanged whilethe other is increased or decreased. Proper tuning of the Proportional Band and the Integral Time parameters involvefinding a balance between the two. Refer to "Adjusting PI Control Parameters" on next page.

OM775-1 25

Adjusting PI Control ParametersPlots of static pressure versus time are provided on the common Duct Static Pressure Control Screen. These provide a visualimage of the effectiveness of the control parameters.

Correcting System Instability (Hunting)If the system control is unstable (hunting), this generally means the control response is too "fast". To correct systemhunting, the first step is to slow down the response by increasing the Integral Time until the system becomes stable. Thismay, however, cause sluggishness in the controlled variable’s approach to the set point during transient conditions (such asat unit start up). * If system sluggishness occurs after the Integral Time is adjusted, it means the overall control response isnow too slow and reducing the Proportional Band must speed up the response. When the Proportional band is changed sothat the controlled variable’s approach to the setpoint is acceptable, it may then be necessary to readjust the Integral Time tore-stabilize the control action.When in doubt, these parameters should be set to the factory default setting.

Correcting System SluggishnessIf the system is sluggish, meaning the controlled variable’s approach to the setpoint during transient conditions (such as atunit startup) is too slow, this generally means the overall control response is too slow. *To correct system sluggishness, thefirst step is to speed up the overall system response by decreasing the Proportional Band so that the controlled variable’sapproach to the set point is acceptable. This may, however, result in system instability (hunting). If system instabilityoccurs, the Integral Time should be increased to slow down the control response and stabilize the control action.When in doubt, these parameters should be set to the factory default setting.

! CAUTION

Grossly misadjusting PI parameters can cause erratic unit operation and equipment damage.

Trained personnel having a thorough understanding of how the parameters affect overall system operation shouldonly adjust PID control parameters. Generally these parameters do not need to be adjusted from the factory defaultsettings.

* Once operating, the system can be checked for sluggishness by changing the setpoint and measuring the time it takes for the controlled variable to reachthe setpoint.

Group ScreensThere are a total of 4 group screens; one for each possible group in the MAC. The purpose of these screens is to providelive data from the rooftop and self-contained controllers, as well as group setpoints and parameters.

Note: Images on these screens may take longer to display until your browser caches them. Please be patient and allowthe screen to finish loading before attempting to change pages.

A red X on top of a unit controller graphic signifies that that particular unit does not exist in this group. For example, ifyour group only consists of 3 self-contained units, there will be a red X through the graphic for one of the units. See Figure15.

26 OM775-1

Viewing Group Data

Figure 15. Group #3 Data Screen

Figure 16. Self-Contained Units, Group #3 Data Screen

OM775-1 27

Figure 17. No Units, Group #1 Data Screen

Figure 18. Rooftop Units, Group #3 Data Screen

While viewing the group screens, the live data may at times be highlighted with a color. Here is a description of what eachcolor means.

• Orange = Bad Sensor Value• Yellow = Loss of Communications• Magenta = Overridden value• Cyan = Out of Service flag is set• Red = in Alarm.

Here are a couple of examples where this color coding can be very helpful.• You can easily tell which unit in the group was selected as the source unit for common outdoor air temperature

control by looking at the colors. The units that have their outdoor air temperatures overridden will have thesetemperatures highlighted in magenta. The unit that is the source unit, will be the one that is not highlighted withany color.

• If the MAC has lost communications with a unit, all the sensor values will be highlighted in yellow and the textwill show up as NaN (Not A Number).

• If a sensor is shorted or open, the bad sensor value will be highlighted in orange and the text will show up as NaN(Not A Number)

28 OM775-1

Saving or Documenting your MAC DatabaseWe recommend you save the current database after making any changes. To do so, simply navigate to the Configurationscreen of the MAC’s user interface screens and press the Save Database button. If the database is not saved, all changeswill be lost if the MAC loses power and the battery is bad.We also recommend that you keep a written copy of the User Admin screen and the Device Addressing screen. Eitherprinting the page from Internet Explorer or taking screen captures and saving them in an electronic file can do this.

Figure 19. Configuration Screen

OM775-1 29

Troubleshooting

Using Status LEDsThe MAC controller includes a series of LEDs that can be used to determine the status of a variety of normal operatingparameters for the unit. They are located on the circuit board. From the top of the board to the bottom, these include thefollowing:

• Ethernet Port• Heartbeat• Serial Ports

Refer to Board Layout, Figure 20 for the exact locations of status LEDs on the MAC controller.

Figure 20. Board Layout

Ethernet PortThere are two green LEDs associated with the Ethernet port, located below the port. The LED marked “100” indicateswhether the MAC is operating at 10 Mbps (Ethernet) or 100 Mbps (Fast Ethernet). If the 100 LED is on, the networkconnection is operating at 100 Mbps. Otherwise, the port is communicating at 10 Mbps.The ACT LED indicates activity on the port as follows:

• Off—No Ethernet link is made• On—Ethernet link is present, but no activity on the LAN• Blinking—Ethernet link is present with data activity on the LAN

30 OM775-1

Serial PortsThe status LEDs for the serial ports are located above the RS-232 and RS-485 ports. They are marked COM1 throughCOM6 and correspond to the software configuration of the COM ports. They show the transmission and receive informationfor the serial ports and optional modem.The yellow transmit LED indicates that the MAC is sending data out the serial port over a communications line to aconnected device. The green receive LED indicates that the MAC is receiving data from a connected device.These LEDs are driven by pulse detectors that provide a fixed on-time when data is detected on the port. If these LEDs areon constantly, this indicates a problem with the communications channel, such as a shorted wire or reversed wiring.

HeartbeatThe Heartbeat LED is located below the Ethernet Port LEDs, and is red. Under normal operation, this LED should blinkabout once per second. The blink pattern will differ as station activity increases, but any pulse rate from once per second to10 blinks per minute usually indicates normal control engine activity. If the heartbeat LED stays on constantly or does notlight, contact the McQuay Controls Support Group at phone number 886-4McQuay, (866-462-7829).

OM775-1 31

Application and Network IssuesProblem Possible Solution

The MAC is set up to control to Common DuctStatic Pressure, but the units are still controllingindependently.

The Discharge Fan Capacity Control item, DF CapCtrl in the Unit Configuration Menu,must be set to "Position" via the keypad in any VAV unit that uses Common Duct StaticPressure Control. The MAC does not read, write or check this setting.

The MAC is set up to control to Common ControlTemperature (Space or Return), but all units in thegroup are controlling to their local ControlTemperature.

A common control temperature is not written to all the units in the group if one of thefollowing are true:(1) The Common Control Method in the MAC is changed from "Return" or "Space" to

"No".(2) The selected Common Control temperature Source is not available from any unit in

the group. The temperature is not available if the MAC is not communicating witha unit controller or if the associated sensor for that unit controller is in alarm (e.g.,shorted or open).

(3) The number of units operating in the group is one or zero.The MAC is set up to control to Common ControlTemperature (Space or Return), however thecorrect temperature is not being written to all theunits.

(1) Though the Control Temperature is written to all units in the group regardless oftheir Unit Status, the Control Temperature is only calculated using the units thatare running.

(2) The Control Temperature is written from the MAC to the units at a BACnet priorityof 7. Make sure that a BAS is not writing to the Control Temperature at a higherpriority.

At least one, but not all, of the units in the groupare not communicating.

(1) Double check wiring.(2) Make sure that the Type, MS/TP Address and Device Instance on the DeviceAddressing page is set correctly.

All of the units in the group are notcommunicating.

(1) Double check the wiring. Make sure that the MicroTech II controllers are wired tothe comm port defined on the Configuration page. See the Troubleshooting StatusLEDs section for more information on troubleshooting Serial Ports.

(2) Make sure that the Type, MS/TP Address and Device Instance on the DeviceAddressing page is set correctly for all units.

Cannot communicate between the PC and theMAC.

(1) Make sure that the PC is on the same IP subnet as the MAC, and that the PC andMAC have unique Host Ids.

(2) If you are not accessing the MAC via a hub, make sure you are using an Ethernetcrossover cable.

(3) The date and time may have been lost due to a bad battery. (See Date and Timefor more information.) Now try connecting again and check the alarm buffer to seeif a battery TestFailed alarm occurred (http://<IPAddress>/alarm/alarmDisplaywhere <IPAddress> is the IP address of the MAC.) If a batteryTestFailed alarmappears in this table, replace the battery.

Having BACnet communications problems fromthe MAC to the MicroTech II unit controllers.

(1) Check to see that the MAC is assigned a unique address on the BACnet network.This address is the "Instance Number" that appears on the Configuration page.

(2) Make sure that "Enabled" on the Configuration page is set to Yes.The setup changes made to the MAC are nolonger present.

If the battery is bad and the MAC loses power, all changes that were made since thedatabase was last saved will be lost. The MAC records a batteryTestFailed alarm inthe alarm buffer when the battery is bad. To view the alarm buffer, type the followingaddress into the address bar in your Internet Explorer browser:http://<IPAddress>/alarm/alarmDisplay where <IPAddress> is the IP address of theMAC. If a batteryTestFailed alarm appears in this table, replace the battery.

32 OM775-1

Determining the MAC’s Network Setting

If you are unsure of the network settings on a MAC controller, first attempt to connect to the MAC at the default IP address(listed on the packaging slip that was shipped with the unit). The previous installer may have left the controller at thosesettings for convenience.If you changed the IP address of the MAC using the browser, but are unsure what you changed it to, you can use theHyperTerminal to figure it out.Since the MAC does not run Windows as its OS, Windows networking will not provide the name of a MAC. If a MAC hasbeen added to a DNS server (and you know the name of it) you can still use the ping command to determine the IP address.However, if you do not know the name or it is not in DNS, you can still determine the IP address and subnet mask byconnecting to the VxWorks target shell and reading them, because they are displayed during the boot sequence.

! CAUTION

Be very careful when using the target shell on a MAC. You must log on to the MAC with administrative privileges,which means you can change many settings. Changes you make could have unexpected consequences, includingmaking the MAC inoperable.

Procedure 12: Determining an IP address of a MAC.Step 1. Using HyperTerminal on your PC, connect to the VxWorks command shell following Step 1 to Step 14 of

Procedure 13.Step 2. When the controller stops displaying new messages, press ENTER to reach the command prompt. You see a

prompt similar to the following: ->Step 3. Using the scroll bars on the HyperTerminal window, scroll up until the section that begins with the line Press any

key to stop auto-boot... (see Figure 21).

Figure 21. IP address read from a HyperTerminal boot sequence

OM775-1 33

The IP address of the MAC is listed on the line that begins inet on ethernet (e) :. The IP address is listed (in dotteddecimal), followed by a colon, and then the subnet mask (in hexadecimal).Step 4. After making note of the IP address, disconnect from the application and reboot the MAC as described in

Procedure 14.Step 5. Connect to the MAC using the Internet Explorer and change the faulty network settings as described in Changing

Networking Properties on page 6.

About the VxWorks Target ShellYou can use HyperTerminal to directly connect to a MAC when you cannot access it remotely across a LAN and need tochange settings to make it accessible. You actually connect to the target shell of the VxWorks operating system (OS).The target shell is a command-line interpreter for VxWorks. It can be reached using HyperTerminal. It allows you to seestation output from the MAC, as well as execute commands.

! CAUTION

Be very careful when using the target shell on a MAC. You log on to the MAC with administrative privileges, whichmeans you can change many settings. Changes you make could have unexpected consequences, including makingthe MAC inoperable. If possible, use the Browser instead.

Use the following procedure to directly connect to a MAC using HyperTerminal.

Procedure 13: Connecting to a MAC using HyperTerminal.Step 1. Attach a flat silver satin cable with standard male RJ-45 (8-wire) connectors to the lower RJ-45 port (the RS-232

port) on the MAC.Step 2. Connect the other end of the cable to a RJ-45 to DB-9 null modem adapter.Step 3. Connect the DB-9 adapter to a serial port (generally COM1 or COM2) of a Windows NT or 2000 computer.The two devices are now physically connected

! CAUTION

Connecting to the MAC via the serial port disables communication to any serial device previously using the COM1port. If you have configured another serial device to use COM1 on the MAC, any driver configured to use that port willreceive an error. This is especially relevant for the MAC where the COM ports are software-selectable. If the RS-485port is configured as COM1 and you attach to the MAC on the RS-232 port, the RS-485 port will not function until youdisconnect from the RS-232 port.

Step 4. Open HyperTerminal as follows:• On Windows NT - Click Start then choose Programs > Accessories > HyperTerminal > HyperTerminal• On Windows 2000 - Click Start then choose Programs > Accessories > Communications > HyperTerminal

Step 5. In the Connection Description dialog box, type a name for this session. For example:Direct connect to MACStep 6. Click OK.Step 7. In the Connect to dialog box, choose either COM1 or COM2, depending on which serial port the null modem

cable or adapter is attached to on your PC.This makes the remaining options on the dialog box unavailable.

Step 8. Click OK.Step 9. On the Comm Properties dialog box, choose the following settings:

• Bits per Second: 9600• Data bits: 8• Parity: None• Stop bits: 1• Flow control: Hardware

Step 10. Click OK.The HyperTerminal session is now set up.

34 OM775-1

Step 11. Open the cover.Step 12. Find the 4-pin connector on the motherboard: The connector is at the top of the board and is marked MODE. It is

in the top right quadrant.Step 13. Connect a jumper to the outer most two pins of the connector (see Figure 22).

Figure 22. 4-pin connector with correct jumper position on the MAC

Step 13. With HyperTerminal open on the Windows PC, unplug the 6 position power connector on the MAC, then plugpower connector back in.

Procedure 14: Disconnecting from the MAC when using HyperTerminal.

Step 1. Press the Disconnect button on the HyperTerminal tool bar.Your session is disconnected from the MAC.Step 2. Close the application by choosing File > Exit to exit the HyperTerminal application.Step 3. Remove the jumper from the MAC.Step 4. Reboot the MAC by removing the power connector, waiting for all lights to extinguish, and plugging the power

connector back in.

OM775-1 35

Connectivity Troubleshooting UtilitiesipconfigThe ipconfig (for IP configuration) command is a command-line utility available on Windows NT 4.0 and Windows 2000hosts. You can use this command to find the IP configuration information for your computer.Note (or Tip): For PCs running Windows 95/98, the winipconfig (Windows IP Configuration) program provides similarinformation. It is also a command-line utility.

Procedure 15: Determining the IP address of your PCStep 1. Open the DOS prompt.Step 2. At the prompt type: ipconfig or ipconfig /allFigure 23 shows typical IP Config information returned for a host.

Figure 23. Ipconfig Command Prompt

pingPacket Internet grouper (ping) is a utility that checks the availability and response time of a network host. It uses theInternet control message protocol (ICMP).The ping utility is typically used to determine whether one host can reach another host. For example, if your PC was havingdifficulty connecting to the MAC, you could ping the IP address (or name) of the MAC to see if it responds. If the hostdoes not respond, there could be a problem with the host configuration, or the Ethernet connectivity (cable, Ethernet card,hub).The typical use of the ping command is to type the following at the DOS prompt:ping <ipaddress>Orping <hostname>Where<ipaddress> is the IP address of the MAC<hostname> is the name of the MAC

36 OM775-1

Figure 24 shows two examples of the ping command.

Figure 24. ping Command Prompt

Above, the ping command was executed 2 different times.• In the first example, the host responded in fewer than 10 milliseconds showing good connectivity.• The second example shows the response you see when an IP address is not responding.

OM775-1 37

Index of Procedures

Changing Networking PropertiesNetwork Setting for Microsoft Windows 95 and 98Procedure 1: To change the network setting in Microsoft Windows 95 and 98 computer ----------------------------------------------------------- 6Procedure 2: To restore the network setting in Microsoft Windows 95 and 98 computer----------------------------------------------------------- 6Network Setting for Microsoft Windows NTProcedure 3: To change the network settings in a Microsoft Windows NT computer --------------------------------------------------------------- 7Procedure 4: To restore the network settings in a Microsoft Windows NT computer --------------------------------------------------------------- 7Network Setting for Microsoft Windows 2000Procedure 5: To change the network settings in a Microsoft Windows 2000 computer ------------------------------------------------------------- 7Procedure 6: To restore the network settings in a Microsoft Windows 2000 computer ------------------------------------------------------------- 8Setting the IP address on a new MAC.Procedure 7: Setting the IP address on a new MAC ------------------------------------------------------------------------------------------------------ 8

Configuring User AccountsProcedure 8: Adding a new User Account and Password ---------------------------------------------------------------------------------------------- 13Procedure 9: Removing a User Account and Password ------------------------------------------------------------------------------------------------- 13Procedure 10: Creating a new password for an already existing user--------------------------------------------------------------------------------- 13

Web User Interface (WebUI)Procedure 11: How to Open the WebUI------------------------------------------------------------------------------------------------------------------ 14

Determining the MACs Network SettingProcedure 12: Determining an IP address of a MAC ---------------------------------------------------------------------------------------------------- 32Procedure 13: Connecting to a MAC using Hyperterminal--------------------------------------------------------------------------------------------- 33Procedure 14: Disconnecting from the MAC when using Hyperterminal ---------------------------------------------------------------------------- 34

Connectivity Troubleshooting UtilitiesProcedure 15: For determining IP address of your PC ------------------------------------------------------------------------------------------------- 35

38 OM775-1

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