seaston_65
Member
This morning I was called to reset a PLC fault on a SLC 5/03 (1747-L531E)
Plugging into the PLC, I realised that the PLC has lost it's program data.
I was able to download without any issue but I was surprised when I looked at the "Errors" Tab under "Processor Status" and saw that there was no battery alarm. I figured that they had the machine off all weekend, and the battery was toast and needed to be replaced.
Turns out, this machine was powered on the entire weekend. Operators/Supervisors encountered a PLC fault, cycled power, when that didn't work, contacted Maintenance.
After Downloading the program, I cycled power a few times and the PLC rebooted without issue.
I've looked through SLC 500-Instruction Set Manual and the SLC 500-Modular Hardware Style Manual, but couldn't really find anything. The Instruction Set mentioned some noise, and feedback through the powersupply, but without an Error Code, I couldn't really find anyhting. Last Major Error S:54=652h, but searching didn't find anything for that code.
Whould the Power Supply be the cause or could I have an issue with the PLC? I know I'm not giving too much info on the PLC fault, just everything I could gather. Just don't want this to be a sitting problem that happens on the weekend or night shift.
Thanks in advance for any help.
Shawn
Plugging into the PLC, I realised that the PLC has lost it's program data.
I was able to download without any issue but I was surprised when I looked at the "Errors" Tab under "Processor Status" and saw that there was no battery alarm. I figured that they had the machine off all weekend, and the battery was toast and needed to be replaced.
Turns out, this machine was powered on the entire weekend. Operators/Supervisors encountered a PLC fault, cycled power, when that didn't work, contacted Maintenance.
After Downloading the program, I cycled power a few times and the PLC rebooted without issue.
I've looked through SLC 500-Instruction Set Manual and the SLC 500-Modular Hardware Style Manual, but couldn't really find anything. The Instruction Set mentioned some noise, and feedback through the powersupply, but without an Error Code, I couldn't really find anyhting. Last Major Error S:54=652h, but searching didn't find anything for that code.
Whould the Power Supply be the cause or could I have an issue with the PLC? I know I'm not giving too much info on the PLC fault, just everything I could gather. Just don't want this to be a sitting problem that happens on the weekend or night shift.
Thanks in advance for any help.
Shawn