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SIMATIC S7-400 / S7-400H / S7-400F /FH

cpu ffrozen

Thread Starter: gfbemrah   Started: 2/20/2012 4:34 PM   Replies: 3

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  2/20/2012, 4:34 PM
gfbemrah
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we have a problem with s7 400.sometimes,  all of the s7 400 cpu s are frozen reason of ip overlap in the network.after we have to restart all cpus.
So production has been stopped and after that a lot of problem has been appeared.
Could you help?is there any idea against of frozen?
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  2/20/2012, 4:54 PM
Marcjan
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Hello,

What do you mean by Frozen?
Communication stops or PLC goes in stop?
Duplicate IP is not allowed and must be solved.

Regards,

Marcjan
Problem solved?
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Please no technical questions by PM, use the forum!
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  2/21/2012, 8:05 AM
gfbemrah
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communication was stopped.Each PLC were stopped in the same network.

Also tx/rx were not working.



=== Edited by gfbemrah @ 2/21/2012 8:06 AM [GMT ] ===
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  2/21/2012, 8:17 AM
Marcjan
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Hello,

So Cpu goes to stop, because off some communication problem and then ofcourse there will be no communication at all.
First you have to look in the Diagnostic buffer why CPU stops and what Error OB is needed to prevent CPU going to stop, download that OB (can be empty).
That will give you some air to really solve the problem
If you have problems understanding the Diagnostics, you can save i as a file and attach it here for us to evaluate.

Regards,

Marcjan
Problem solved?
Please let us know!

Please no technical questions by PM, use the forum!
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