setting up a wirelesshartnetworkfiles.messe.de/abstracts/...a_wirelesshart_network.pdf ·...
TRANSCRIPT
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Setting Up A WirelessHARTNetworkPresenter
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Steps for Planning a Wireless Project
1. Scope the project (objectives)• Monitoring or Control• Asset Management
2. Planning the Network (Best Practices)
• Segmentation and network capacity
• Geographic layout & P&ID’s3. Host Integration
• Integrate the gateway into the system
• Security • Commissioning
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Scope the Project (Objectives)
• Process monitoringReduce Operator RoundsAd hoc low cost measurement to improve process visibilityHealth, safety, environmental monitoringOpen loop or non-critical control
• Asset MonitoringOptimize maintenance scheduleMonitor critical assets
Controller with bus (Modbus – Profibus Gateway connection
WirelessHART Instrument MESH
Gateway Gateway
Asset OptimisationEthernet connection
WirelessHART Instrument MESH
Gateway Gateway
AO WorkplaceCMMS
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Device Location
• Locate Instruments based upon segmentation criteria
• Check coverage via scaled site drawing
• Locate repeaters as required
• The gateway can be moved into the plant (check certification)
• You could use directional or remote antennae
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Understanding the Network Components
• One Network Manager
• Multiple Gateways (Only one per wireless network)
• Multiple Access Points per Gateway(for Redundancy and Throughput)
• Devices Per Access Point =Average Update Rate (Sec) X 30
1Sec AUR X 30 = 30 Devices60Sec AUR X 30 = 1800 Devices if faster update/more devices then add an Access Point!
AccessPoint
AccessPoint
GatewayWirelessHandheld
Network Manager
Security Manager
WirelessAdapter
HART-enabledField Devices
WirelessHARTField Devices
Process AutomationController
Host Application(e.g., Asset Management)
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Host System Communication
• Industry Standard ProtocolsEthernet• Modbus TCPIP• OPC• FOUNDATION Fieldbus HSE• ProfiNet• Https• XML• VPN
Serial (RS232/RS485)• Modbus RTU• Profibus DP• HART/485
GatewayPLC/Controller
Wired Wireless
Ethernet
Fiber Optic
Serial
Bandwidth
Cyclic and Acyclic
GatewayPLC/Controller
Wired Wireless
Ethernet
Fiber Optic
Serial
Bandwidth
Cyclic and Acyclic
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Host Data Capacity
• Serial Data CapacityData telegram size may have a limit (244 bytes Profibus DP)
• Controller I/O CapacityMay be based upon TAG limit or memory
• Gateway CapacityMay be designed for specific network size
10001001101
110
GatewayPLC/Controller
Wired Wireless
Ethernet
Fiber Optic
Serial
Bandwidth
Cyclic and Acyclic
GatewayPLC/Controller
Wired Wireless
Ethernet
Fiber Optic
Serial
Bandwidth
Cyclic and Acyclic
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HCF Cooperates with WCTWirelessHART Mesh NetworkWirelessHART Mesh Network
Interface
CommunicationTechnology
CommunicationTechnology
Specified by WCT
Specified by the respective organization
Validated Specifications in 2009
Gateway
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Accessing Cyclic Data
• Mapping PV to registers –Function blocks or modules
Gateway
Register TAG45001 TT101.PV45003 TT102.PV40005 PT506.PV45007 LT699.SV
Modbus RegisterMapping
Database RegisterTT101A 45001TT102A 45003PT506A 45005LT699A 45007
Modbus
System
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Accessing Cyclic Data
• Mapping PV to registers –Function blocks or modules
Gateway
Module Device TAGM1 TT101.PVM2 TT102.PVM3 PT506.PVM4 LT699.SV
Profibus ModuleMapping in Gateway
Database Slave/Module
TT101A M1TT102A M2PT506A M3LT699A M4
Profibus DP
System
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Accessing Cyclic Data
• Mapping PV to registers –Function blocks or modules
Gateway
TransducerBlock Device TAGTT101_TB.HART_PV TT101.PVTT102_TB.HART_PV TT102.PVTT506_TB.HART_PV PT506.PVTT699_TB.HART_SV LT699.SV
FF TransducerMapping in Gateway
Cyclic data access to
transducer block
System
HSE
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4-20 mA Control Loop
Existing HART Device
Asset Management SystemExisting non-HART
Control System
WirelessHART Device• Battery Powered• Solar Powered• Field Powered
WirelessHARTAdapter WirelessHART
GatewayPV + HART DataPV + HART Data
HARTDATA
From Wired …To Wired + Wireless = WirelessHART
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Establishing the Network
Control or Asset Management
System
WirelessHARTGateway
WirelessHART Mesh Network
Handheld Terminal
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Summary
• Pick the appropriate “physical” connection• Select the appropriate protocol• Understand the constraints of the system
interface and gateway• Continuously monitor the network diagnostics