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IM151-8PN/DP in STOP mode

Created by: COOLRAJ at: 12/8/2009 8:15 AM (3 Replies)

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12/8/2009 8:15 AM	Rate (0)
COOLRAJ Posts: 28 Rating: (0)	We have one PLC IM151-8PN/DP which is frequently going in STOP mode. Whenever PLC is in run mode and I try to go online with my laptop the PLC immediately switches to STOP mode. the Diagnostic buffer file is attached. what could be the probable reason.Can someone help me in analysing this problem. Attachment diagnostic buffer.pdf (39 Downloads)
COOLRAJ Posts: 28 Rating: (0)
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12/8/2009 8:31 AM	Rate (0)
Tomcat Posts: 433 Rating: (48)	Hi, in your programm you call the FB49 and DB49. But these blocks are not loaded in the CPU. This is an programming error and the CPU tries to call OB121 (programming error OB). This OB is also not loaded in the CPU and so the CPU goes to STOP. You have to load FB49 and DB49 into your CPU. Tomcat
Tomcat Posts: 433 Rating: (48)	Last edited by: Tomcat at: 12/8/2009 8:36 AM
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12/8/2009 8:50 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 6/5/2023 Posts: 2966 Rating: (1025)	COOLRAJ Whenever PLC is in run mode and I try to go online with my laptop the PLC immediately switches to STOP mode. Hello COOLRAJ Tomcatis correct, FB49 and DB49 are missing from the PLC (gut feeling tells me that they are used for Report system Error and while they are automatically created they still need to be downloaded). The root cause that leads to the call of the (non-existing) FB49/DB49 seems to be a (short lived?)failure of a Profinet I/O station though. Event 10 to4in your Diag buffer all relate to OB122 I/O access error, followed by a "return to healthy"of the Profinet I/O station which is registered bya call to OB86 (event 3). I wonder if you either "upset" the Ethernet somehow when you plug your Laptop into the network (e.g. loose Plug in the switch,poor Profinetcable connection in Plug etc.) or if your Laptop perhaps hasthesame IP address as the I/O station? Food for thought and I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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12/10/2009 1:53 PM	Rate (0)
COOLRAJ Posts: 28 Rating: (0)	Thanks a lot TOMCAT and FRITZ. But the problem still present is that the PLC is neither in STOP mode nor in RUN mode. The STOP LED keeps blinking and I cannot go online. I am not able to clear PLC or reset it.
COOLRAJ Posts: 28 Rating: (0)
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