diagnostic & troubleshooting date 06/09/00, page 1 diagnostic & troubleshooting s

Diagnostic & TroubleshootingDate 06/09/00,

Diagnostic & Troubleshooting

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Always the 1st step - Stay out of Trouble!

Installation according to PROFIBUS Installation Guideline (Document 2.112, available from PTO)

Use REAL PROFIBUS cable according to the standard

Choose a master with an “easy to use” configuration tool

Use appropriate shielding & grounding



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Check the Physical Setup - with the BT 200

Wire break/crisscross

Short circuit

Termination

Bus scan

Length

Reflections

RS 485 interface



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How to use the BT 200? Connect test plug with first connector and BT200 with

last connector

Termination “ON” at the test plug only while testing the cable

Turn the BT 200 “ON” and press the test key

If everything is ok, you see the message “cabling o.k. (1R)” otherwise an error message appears

TestPlug BT200

Connector

Termination ON, interrupts daisy chain



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How to use the BT 200? (continued) In case of an error - work your way “up”

TestPlug

BT200

Connector

Termination ON, interrupts daisy chain

TestPlug

BT200



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During Operation - Utilize LEDs of Devices



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Diagnostic is built into PROFIBUS DP...

6 Bytes Mandatory

Header Header Header

Device Related

(Optional)

Identifier Related

(Optional)

Channel Related

(Optional)

Up to 244 Bytes



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…so each Controlling Device can provide it!

e.g. via flow charts in a Soft PLC...

…or via a message on an HMI panel...

…or via a function call in a PLC.



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PROFIBUS Monitor Monitors bus

traffic

No bus address

No influence on performance

Live list

Trigger on events

Detailed knowledge required

! Expert Tool !

! Expert Tool !



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Diagnostic Repeater

Segment 2 Segment 3

Segment 1

Segment 4

! NEW - 3 rd quarter 2001 !


Standard PROFIBUS

Automatic search for transmission rate

Repeater functionality

Works with existing components



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Diagnostic Repeater (continued)

How does it work? Bus address assigned to diagnostic repeater

Repeater determines and stores network topology

Action is started by the configuration tool starts

Errors determined via reflection measurements

Standard PROFIBUS diagnostic used to report problems back to master





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Segment 2 Segment 3

Segment 1

Segment 4

Error detection for segments 2 and 3

9 pin sub D for PC connection, e.g. for diagnostic purposes (segment 4)

How does it work?



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Wire break

Short circuit A, B or versus shield

Termination

Sporadic errors

What type of errors can be detected?





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Name of the disturbed segment

Cause of disturbance

Location (between station X and Y)

Distance

Error rate (percentage)

What is reported?

Diagnostic Repeater (continued)! NEW - 3 rd quarter 2001 !




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Diagnostic Repeater (continued)! NEW - 3 rd quarter 2001 !


Online Diagnostic via

Configuration Tool

diagnostic & troubleshooting date 06/09/00, page 1 diagnostic & troubleshooting s

Documents

diagnostic repeater

diagnostic purposes

bytes slide

interface slide

interrupts daisy chain

profibus dp

test key

bus address