Mitsubishi Electric M700VS Series Setup Manual page 589

MITSUBISHI CNC
Appendix 2 Explanation of Alarms
U60 Ladder is not saved
Details
The PLC program is not written into ROM.
(Note) The number of PLC program steps displayed on the screen may not match the actual number of
Remedy
Write the PLC program into ROM.
572
error occurrence steps because of the PLC program timing. Use this as a guideline of the
occurrence place.