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Diagnostic Repeater Watchdog Activated (6ES7 972-0AB01-0XA0)

Created by: YvonV at: 7/13/2012 3:04 PM (7 Replies)

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7/13/2012 3:04 PM	Rate (0)
YvonV Posts: 29 Rating: (0)	I havethree Diagnostic repeaters on a S7-319F PN/DP On the CPU Diagnostic Buffer all three diagnostic repeaters are reporting "Module problem or maintenance necessary" When I go look at the module information on the repeaters online I see in it's Diagnostic Buffer "Watchdog Activated" But also on each repeater I see the DP Cycle Time Never exceed 9ms. the watchdog on the DP Master is set just over 150ms. so why am I getting this? also how to I set the Date/Time on the Diagnostics Repeater? I have the time set on the PLC. Thanks Yvon Attachment HW Config Diag Screeny.JPG (541 Downloads)
YvonV Posts: 29 Rating: (0)	Last edited by: YvonV at: 7/13/2012 3:27 PM added screenshot of issue
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7/14/2012 12:18 PM	Rate (0)
jklm Platinum Member Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309)	Hello, I just wonder if there is a real problem. In my opnion "Watchog activated" is just an indication, not an error. In your picture, there is nowhere a red bullet with white cross indicating an error.
	Best regards jklm Suggestion was helpful? Feel free to rate it.
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7/16/2012 8:46 PM	Rate (0)
YvonV Posts: 29 Rating: (0)	The alarm in on the CPU only stays present for 2 seconds and each of the (3) diag. repeaters and then goes away. I would think the alarm would stay in the Diagnostic message window for historic purposes but this doesn't seem to be the case. Not really sure how else to diagnose this. Yvon
YvonV Posts: 29 Rating: (0)
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7/17/2012 1:30 PM	Rate (0)
Rated X Posts: 1547 Rating: (129)	Hello, can you post the diagnostic buffer of CPU for more details? Did you check the wiring of your profibus network about cascading the diagnostic repeater? Check chapter 3.1.4 in Manual --> SIMATIC Diagnostic Repeater for PROFIBUS-DP There are no bus terminals used in your network!
Rated X Posts: 1547 Rating: (129)
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7/19/2012 12:24 AM	Rate (0)
YvonV Posts: 29 Rating: (0)	Attached is the Module Diag for the issue I am having. I am reviewing the drawings against the section of the manual you pointed too. This network is set to 1.5M, under the typical Profibus rules at this speed you can go 200-300meters can't you. is this not the case when using these repeaters? On this system here are 3 of them, I am not sure of the cascade or the distance as of yet.Unfortunately I was not part of the design/installation. but I'm the one trying to fix it :) let me know your thougths once you look at the attached PDF Regards, Yvon Attachment Diag.pdf (258 Downloads)
YvonV Posts: 29 Rating: (0)
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7/19/2012 4:12 PM	Rate (0)
Rated X Posts: 1547 Rating: (129)	Hello YvonV, please let me know what device has the IO Adress 8186 and 8170? This address reports in detail the error.
Rated X Posts: 1547 Rating: (129)
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7/19/2012 8:44 PM	Rate (0)
YvonV Posts: 29 Rating: (0)	Those are the diagnostic Repeaters. When I check the Module Diagnostics on those devices I see no errors. is the Diagnostic buffer on the repeater not retentative? can it only be viewed while the fault is present? I'm nearly complete in the layout and length audit. Will report that once completed. Yvon
YvonV Posts: 29 Rating: (0)	Last edited by: YvonV at: 7/19/2012 11:43 PM
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7/20/2012 3:48 AM	Rate (0)
YvonV Posts: 29 Rating: (0)	I completed the audit of the network and the longest network length is 70 Meters. The network topology matches the examples from the manual above. Now something new that started out of the blue yesterday is I have 2 Nodes (1 from yesterday and one from today) that are about 3 meters appart that faulted. they both have the same error. They both had faulted and recovered within 200ms. But the strange thing about these two is these aren't from the longest network length below is the buffer information; Event 1 of 490: Event ID 16# 38C4 Distributed I/Os: station return Address of the affected DP slave: station number: 76 DP master system ID: 1 Log. base address of the DP slave: Input address: 8158 Log. base address of the DP master: 8191 Requested OB: Rack failure OB (OB86) Priority class: 26 External error, Outgoing event 02:42:34.399 PM 07/18/2012 Event 2 of 490: Event ID 16# 3842 Module OK Module type: Distributed I/0s Input address: 8158 User information available Diagnostic interrupt from substitute Requested OB: Diagnostic interrupt OB (OB82) Priority class: 26 External error, Outgoing event 02:42:34.226 PM 07/18/2012 Event 3 of 490: Event ID 16# 39C4 Distributed I/Os: station Failure Address of the affected DP slave: station number: 76 DP master system ID: 1 Log. base address of the DP slave: Input address: 8158 Log. base address of the DP master: 8191 Requested OB: Rack failure OB (OB86) Priority class: 26 External error, Incoming event 02:42:34.182 PM 07/18/2012
YvonV Posts: 29 Rating: (0)
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