ABB 800XA 6.0.1 CONTROLLER HANG DURING LOADING OF MODBUS PROGRAMME.
Dear Sir,
We have PM866 Controller in ABB 800 XA 6.0.1
Presently Total System load is 92%
Total Cyclic Load: 70%
Today when i download 2 Nos.Conzerve meter then during downloading Both Controllers & Communication module becomes in Fault Mode & All plant trip and Complete DCS hanged.
Please suggest root cause of such situation.
Snaps attached for reference.
We have PM866 Controller in ABB 800 XA 6.0.1
Presently Total System load is 92%
Total Cyclic Load: 70%
Today when i download 2 Nos.Conzerve meter then during downloading Both Controllers & Communication module becomes in Fault Mode & All plant trip and Complete DCS hanged.
Please suggest root cause of such situation.
Snaps attached for reference.
Asked 9 days ago
Answers
0
Hello!
I'd suggest you to carefully read the AC 800M Configuration Manual (3BSE035980-...)
It states:
"The cyclic load is the percentage of controller CPU power used for program
execution of application code. If the cyclic load exceeds 70% in the controller,
so-called load balancing is initiated automatically. The interval time for all tasks,
except the time-critical task, is then generally increased, to limit the cyclic load to
70%. Load balancing is not available in High Integrity controllers."
You are running a severe system load and it is critical to address this issue before applying changes.
This in combination with risk assessment has to be done to avoid these kind of system and production disruptions.
Regards.
I'd suggest you to carefully read the AC 800M Configuration Manual (3BSE035980-...)
It states:
"The cyclic load is the percentage of controller CPU power used for program
execution of application code. If the cyclic load exceeds 70% in the controller,
so-called load balancing is initiated automatically. The interval time for all tasks,
except the time-critical task, is then generally increased, to limit the cyclic load to
70%. Load balancing is not available in High Integrity controllers."
You are running a severe system load and it is critical to address this issue before applying changes.
This in combination with risk assessment has to be done to avoid these kind of system and production disruptions.
Regards.
Answered 9 days ago
Add new comment