Hi There
I am having a strange problem, i have put all my pids in to a periodic task and now i am having synchronization of the processor problem. After some time, the primary processor becomes out of sync with srcondary and the switch over takes place. At the same time, previously primary processor OK LED starts flashing. I switched the key positions from remote to program and then run and back to remote. By doing so couple of times, red Flashing LED goes away but green comes in. Once system becomes synchronized again, after running sometime, now primary processor becomes outof synch and does the same thing....This problem starts coming right after i put my PIDs into periodic task, before they were in continous task and was not having this problem at all. I am using Control logix L63 redundant processors, here is the program task paramters:
Continuous task Scan time = 170 ms Approximately
PID Periodic Task scan time = 20 ms Aprox.
PID Periodic task Period = 250 msec
PID Loop update time = 250 msec
1756 Input card RTS(real time sampling) timer = 100 msec (can not reduce it down to 100msec)
1756 Input card RPI time is 100 msec
Anybody have any idea what is doing it? I am on site so please any of your comments will be highly appreciated. Thanks in advance
I am having a strange problem, i have put all my pids in to a periodic task and now i am having synchronization of the processor problem. After some time, the primary processor becomes out of sync with srcondary and the switch over takes place. At the same time, previously primary processor OK LED starts flashing. I switched the key positions from remote to program and then run and back to remote. By doing so couple of times, red Flashing LED goes away but green comes in. Once system becomes synchronized again, after running sometime, now primary processor becomes outof synch and does the same thing....This problem starts coming right after i put my PIDs into periodic task, before they were in continous task and was not having this problem at all. I am using Control logix L63 redundant processors, here is the program task paramters:
Continuous task Scan time = 170 ms Approximately
PID Periodic Task scan time = 20 ms Aprox.
PID Periodic task Period = 250 msec
PID Loop update time = 250 msec
1756 Input card RTS(real time sampling) timer = 100 msec (can not reduce it down to 100msec)
1756 Input card RPI time is 100 msec
Anybody have any idea what is doing it? I am on site so please any of your comments will be highly appreciated. Thanks in advance