Hello experts,
I am new with siemens,
I have CPU 317 with 4 racks with im-153 (profibus)
Sometimes every 2 days the fourth rack stopped for one 0.027 sec only then back again to normal.
We concentrate on monitoring on CPU bf and found that it illuminate for one second then go off!!!
We check the tighten of profibus cables connector and check for all racks led, all seems normal.
Start to improve grounding and shielding without progress
Attached is the buffer diagnostics results (date and time is not adjusted)
Noted that this setup was from 3 years without any change.
I think that changing profibus cable may solve the problem but need to ask if there is any troubleshooting recommended before doing that as it will be a very hard job.
OB 86 and OB 122 are included at CPU programe
I am new with siemens,
I have CPU 317 with 4 racks with im-153 (profibus)
Sometimes every 2 days the fourth rack stopped for one 0.027 sec only then back again to normal.
We concentrate on monitoring on CPU bf and found that it illuminate for one second then go off!!!
We check the tighten of profibus cables connector and check for all racks led, all seems normal.
Start to improve grounding and shielding without progress
Attached is the buffer diagnostics results (date and time is not adjusted)
Noted that this setup was from 3 years without any change.
I think that changing profibus cable may solve the problem but need to ask if there is any troubleshooting recommended before doing that as it will be a very hard job.
OB 86 and OB 122 are included at CPU programe