adccommunitymod (AutomationDirect) asked a question.
Created Date: January 28,2009
Created By: rta53
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Using V2.23 of C-more programming software. I have a 10 " Cmore connected to an AB Compact Logix via ethernet. Occasionally I get the PLC-011 error code. Evidentially there is something in my PLC logic that is generating this. Is there some way I can determine exactly what is causing this? I am using some compute instructions in the PLC to calculate remaining time in some timers but it is all basically subtraction and division. One thing I tried was to change the Poll time from 0 to 250 msec. This seemed to get rid of the error but it also caused my timer display to be erratic.
Created Date: January 29,2009
Created by: jackson
What is the rest of the error code? There should be another number following the PLC-011.
Oops, never mind. That is the error saying that C-more didn't get the response it expected.
That could possibly be a noise issue. Have you tried wiresharking the transactions to see if you could catch the 'rougue ' response?
Created Date: February 05,2009
Created by: rta53
Well I checked the error log and it basically contained 100 of my tags. Maybe 100 is the max it will display. :) Maybe it is a noise or timing issue. I was at a loss as to what you meant by "wiresharking " but I see that it is some kind of network analyzer. What can I do about the noise? This is my first C-more job, may be my last.
Created Date: February 05,2009
Created by: jackson
Yea, that sounds more and more like noise if it seems to affect 100 different tags.
Again, using wireshark to analyze the data would give you more info on exactly what is happening. The tool is free and pretty easy to use.
This is my first C-more job, may be my last.
Understood, but if it is electrical noise it will really matter little whose panel you use in that environment. Electrical noise is not picky about the manufacturer it affects. I have seen it and fought it with everybody's stuff.
Grounding is a key point. Cable isolation is another (don't run cables next to VFD lines, etc...).
Just do a search on electrical noise and how to deal with it and you will get a long list of things to do. Simply grounding somewhere is not enough. You have to ground in the correct way.
Created Date: January 28,2009
Created by: rta53
Using V2.23 of C-more programming software. I have a 10 " Cmore connected to an AB Compact Logix via ethernet. Occasionally I get the PLC-011 error code. Evidentially there is something in my PLC logic that is generating this. Is there some way I can determine exactly what is causing this? I am using some compute instructions in the PLC to calculate remaining time in some timers but it is all basically subtraction and division. One thing I tried was to change the Poll time from 0 to 250 msec. This seemed to get rid of the error but it also caused my timer display to be erratic.