Hello everyone, plant lost power for about forty minutes Sunday. Came in Monday and the extruder line controller, a 1756 L61 in a 7 slot chassis, has its OK LED solid red and RUN off. Go online and it asks to download, says there's no project in the controller. The tree is empty.
Electricians on days say the BAT LED had been red for weeks and nobody wrote it up. We power cycled the chassis, reseated the L61, moved it to another slot, all the same, and the March backup downloads and runs, so the hardware's alive.
What I can't work out is why it lost everything. Boss wants to order a new L61 today and I'd rather know first. Could someone explain whether a flat battery on its own empties the whole thing like that, or is the L61 gone as well?
BAT LED red for weeks and then a power loss. That's your whole answer, but tell me: is there a 1756-BA1 in the front door of that L61, and when was it last changed? The L6x keeps the project in RAM, the battery is the only thing holding it when the chassis is off.
Check the chassis PSU LED anyway while you're in there. But it's the battery.