Mitsubishi Electric M800 Series Manual page 135

M800/M80/E80/C80 Series Alarm/Parameter Manual
10 User PLC Alarms (U)
U55 PLC stopped / is not saved
Details
The ladder is stopped and the edited sequence program is not stored in the built-in ROM.
(The contents of temporary memory area and sequence program in the built-in ROM are mismatched.)
Remedy
Run the PLC.
Use GX Developer or the built-in PLC edit function to perform write to the built-in ROM.
U60 Ladder is not saved
Details
The edited sequence program is not stored in the built-in ROM.
(The contents of temporary memory area and sequence program in the built-in ROM are mismatched.)
Remedy
Use GX Developer or the built-in PLC edit function to perform write to the built-in ROM.
IB-1501279-H 118