ACS850 drive emergency stop (off2) coming
ACS 850 drive 7 drives connected with S71500 PLC through profibus DP module . this machine running with PID control ,
after running few minutes , emergency stop off2 alarm coming and stop just 1 seconds and automatically reset. due to this alarm pid communication lose and stop the other following drive.
this alarm coming not same drive , for example one time its come in drive 2 , next time coming drive 4 like that.
i completely check the profibus cable and connection,
please advice how to solve this issue.
Thanks
Abdullah
Asked 10 months ago
Answers
0
Hi
it might not be a problem on the drives, but on the PLC .... if as you say it is random, it is difficult to give you safe suggestions.
To make a certain diagnosis, a careful analysis must be done with a ProfiBus network analyzer to understand who the source of the fault is OFF2
First things first: how long has your system been running smoothly?
Or did this type of failure function occur right from the start?
Has anything changed in the system configuration that may have a connection with these events?
Have you tried to reduce the transmission speed of the ProfiBus network?
Try giving some more info
BR
Flavio
it might not be a problem on the drives, but on the PLC .... if as you say it is random, it is difficult to give you safe suggestions.
To make a certain diagnosis, a careful analysis must be done with a ProfiBus network analyzer to understand who the source of the fault is OFF2
First things first: how long has your system been running smoothly?
Or did this type of failure function occur right from the start?
Has anything changed in the system configuration that may have a connection with these events?
Have you tried to reduce the transmission speed of the ProfiBus network?
Try giving some more info
BR
Flavio
0
Hi
in addition to my previous answer, I can tell you that if the drive goes into alarm for OFF2 and after a short time it is reset, you have to check who resets. In fact, when the intervention of OFF2 occurs, only the PLC can reset this fault, for example by sending the value 1278 in the CW ProfiBus of that drive. You have not yet indicated whether it is a fault that occurred some time after the commissioning of the system or if it is a fault that occurred immediately, at the first start-up
BR
Flavio
in addition to my previous answer, I can tell you that if the drive goes into alarm for OFF2 and after a short time it is reset, you have to check who resets. In fact, when the intervention of OFF2 occurs, only the PLC can reset this fault, for example by sending the value 1278 in the CW ProfiBus of that drive. You have not yet indicated whether it is a fault that occurred some time after the commissioning of the system or if it is a fault that occurred immediately, at the first start-up
BR
Flavio
0
thanks for your quick reply
First things first: how long has your system been running smoothly? some time 15 minutes , some time 30 or 40 minutes .
did this type of failure function occur right from the start? no this alarm coming during the running.
Has anything changed in the system configuration that may have a connection with these events? no , just we commissioning the machine
Have you tried to reduce the transmission speed of the ProfiBus network? no, what you recommend.
BR
Abdullah
First things first: how long has your system been running smoothly? some time 15 minutes , some time 30 or 40 minutes .
did this type of failure function occur right from the start? no this alarm coming during the running.
Has anything changed in the system configuration that may have a connection with these events? no , just we commissioning the machine
Have you tried to reduce the transmission speed of the ProfiBus network? no, what you recommend.
BR
Abdullah
Answered 10 months ago
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