KerryP
Member
I have a 1756-L55/A, Rev. 11.25 that lost it's program while running. When I got to the panel, the BAT LED was dark and the OK LED was solid red. When I tried to go online with it, there was no program in the PLC. I downloaded and power cycled and sure enough, no program, BAT LED not lit. I replaced the battery, downloaded and power cycled, no problem. Power cycled like 8 more times, no problem. Returned the system to production and it has been running like 20 hours now.
Any clues as to why this can happen or advice on how to prevent geriatric controllers from arriving at complete dementia would be greatly appreciated.
Of course we are planning and allocating to replace grandpa with a new baby L62, but that could take a little while.
Any clues as to why this can happen or advice on how to prevent geriatric controllers from arriving at complete dementia would be greatly appreciated.
Of course we are planning and allocating to replace grandpa with a new baby L62, but that could take a little while.