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S7-300 profibus communication

Created by: Ganeshraj at: 2/6/2012 3:07 PM (4 Replies)

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2/6/2012 3:07 PM	Rate (0)
Ganeshraj Posts: 32 Rating: (1)	Hi, I configured two 315-2DP PLC with profibus communication. I called OB 86 in the program. Whenever Master going down Slave is continuing in running mode, but whenever master coming up after a breakdown, slave fall to stop mode. As per the application requirement, slave needs to be continue in Run mode. Please give some suggessiion to solve this issue.
Ganeshraj Posts: 32 Rating: (1)
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2/6/2012 3:25 PM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 5/2/2023 Posts: 2957 Rating: (242)	Hi, You still miss some OB's. I think the one you need OB87. Load it and it should be ok. If not then check diagnostic buffer and here you will find some more required OB's if any. But normally OB87 should be enough.
	Best regards, Darius
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2/6/2012 4:49 PM	Rate (0)
Ganeshraj Posts: 32 Rating: (1)	Hi, I used OB87, but still I am facing the problem. Once after changing the slave to stop mode and getting back to run mode by using the switch clearing the fault. can you explain how to do thisby PLC program. Thanks & Regards, Ganeshraj.G
Ganeshraj Posts: 32 Rating: (1)
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2/6/2012 4:50 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 4/12/2023 Posts: 10221 Rating: (1176)	<OFFT> Which organization blocks do you need for error handling?

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2/6/2012 10:33 PM	Rate (0)
Marciano Bronze Member Joined: 4/30/2007 Last visit: 3/9/2023 Posts: 231 Rating: (23)	Dear Ganeshraj, have you checked the PLC Diagnostic Buffer as suggested, normally it tells the reason for the Stop...

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