Kim Hansen Posted February 7, 2014 Posted February 7, 2014 Umac system (pmac turbo controller cpu) Would anyone happen to know what could cause PLC 0 to suddenly become disabled? I've already ruled out disable plc instructions as well as changes of I5. Though rare, it happens in the midst of production for no apparent reason. Servo movements aren't affected, and all of the other PLC:s stay up and running. Global status flags looks normal. If i manually restart plc 0 then everything is ok again. Any help/suggestions appreciated!
Sina.Sattari Posted February 8, 2014 Posted February 8, 2014 Check your code and make sure you're not writing to bit 22 of Y:$3100 by mistake:
Kim Hansen Posted February 24, 2014 Author Posted February 24, 2014 Check your code and make sure you're not writing to bit 22 of Y:$3100 by mistake: Thank you for the suggestion, didn't know about this possibility to control the PLC execution. However, there are no M-variables assigned to this address and in this particular program there are no pointers/indexing so this probably isn't the issue. If it keeps happening I will probably suggest a CPU exchange to rule out firmware/hardware issues.
hibitor Posted March 23, 2014 Posted March 23, 2014 Kim. I encountered the same problem with you, I use the clipper. Till now, I haven't found the answer. I suggest that you can replace PLC0 with PLCCx if it can meet your needs. good luck
steve.milici Posted March 24, 2014 Posted March 24, 2014 A very unlikely condition would be if the PLC0 found a structural error at runtime (with older firmware, usually found in nested loops) PMAC will stop the PLC after one scan. All modern versions of firmware will catch 99% these at down load time.
dzrong Posted November 4, 2014 Posted November 4, 2014 I had same problem,PLC0 stop running itself.Maybe 2~3 times one year.
dzrong Posted November 4, 2014 Posted November 4, 2014 I had same problem,PLC0 stop running itself.Maybe 2~3 times one year.
chrisb Posted November 7, 2014 Posted November 7, 2014 I had same problem,PLC0 stop running itself.Maybe 2~3 times one year. I've deployed hundreds of Turbo PMAC2 (all varieties) systems, running a PLC0 and/or PLCC0: i5=3 and have never encountered this issue. If not a code problem, possible H/W issue? Have you checked your CPU load while your system is running all axes and PLC0 activated? Chris
chrisb Posted November 7, 2014 Posted November 7, 2014 I had same problem,PLC0 stop running itself.Maybe 2~3 times one year. I've deployed hundreds of Turbo PMAC2 (all varieties) systems, running a PLC0 and/or PLCC0: i5=3 and have never encountered this issue. If not a code problem, possible H/W issue? Have you checked your CPU load while your system is running all axes and PLC0 activated? Chris
hibitor Posted November 12, 2014 Posted November 12, 2014 I had same problem,PLC0 stop running itself.Maybe 2~3 times one year. I've deployed hundreds of Turbo PMAC2 (all varieties) systems, running a PLC0 and/or PLCC0: i5=3 and have never encountered this issue. If not a code problem, possible H/W issue? Have you checked your CPU load while your system is running all axes and PLC0 activated? Chris Maybe it's difficulty to check the load while the system is running when this problem occurs. after all, just three times in one entire year. what I feel strange is :Why are the same programs run time and time again over the days, but just several times, this problem comes out?
hibitor Posted November 12, 2014 Posted November 12, 2014 I had same problem,PLC0 stop running itself.Maybe 2~3 times one year. I've deployed hundreds of Turbo PMAC2 (all varieties) systems, running a PLC0 and/or PLCC0: i5=3 and have never encountered this issue. If not a code problem, possible H/W issue? Have you checked your CPU load while your system is running all axes and PLC0 activated? Chris Maybe it's difficulty to check the load while the system is running when this problem occurs. after all, just three times in one entire year. what I feel strange is :Why are the same programs run time and time again over the days, but just several times, this problem comes out?
chrisb Posted November 12, 2014 Posted November 12, 2014 I had same problem,PLC0 stop running itself.Maybe 2~3 times one year. I've deployed hundreds of Turbo PMAC2 (all varieties) systems, running a PLC0 and/or PLCC0: i5=3 and have never encountered this issue. If not a code problem, possible H/W issue? Have you checked your CPU load while your system is running all axes and PLC0 activated? Chris Maybe it's difficulty to check the load while the system is running when this problem occurs. after all, just three times in one entire year. what I feel strange is :Why are the same programs run time and time again over the days, but just several times, this problem comes out? My thought with PMAC CPU load was while the system is functioning normally and PLC0 is running. What is the average and peak loads on the PMAC CPU..??? Regards, Chris
chrisb Posted November 12, 2014 Posted November 12, 2014 I had same problem,PLC0 stop running itself.Maybe 2~3 times one year. I've deployed hundreds of Turbo PMAC2 (all varieties) systems, running a PLC0 and/or PLCC0: i5=3 and have never encountered this issue. If not a code problem, possible H/W issue? Have you checked your CPU load while your system is running all axes and PLC0 activated? Chris Maybe it's difficulty to check the load while the system is running when this problem occurs. after all, just three times in one entire year. what I feel strange is :Why are the same programs run time and time again over the days, but just several times, this problem comes out? My thought with PMAC CPU load was while the system is functioning normally and PLC0 is running. What is the average and peak loads on the PMAC CPU..??? Regards, Chris
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