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We have installed SLC 5/04 (Allen-Bradley) for our control process in DM plant. We are facing the problem of abnormal behaviour of the PLC intermittently, wherein some of the valves of the process streams get open without command. Most importantly, we do not get any logging of abnormality in RSView (connected with PLC) or the rungs.
We had migrated from old PLC PLC-5 (cards 1771) and added new streams in the new PLC with the same logic.
We have carried out the following exercises:
1. Replacement of ASB card
2. Checking of logic
3. Checking of processor & other cards
Kindly share your experiences on these incidents.
We had migrated from old PLC PLC-5 (cards 1771) and added new streams in the new PLC with the same logic.
We have carried out the following exercises:
1. Replacement of ASB card
2. Checking of logic
3. Checking of processor & other cards
Kindly share your experiences on these incidents.