Mitsubishi Electric M700VS Series Setup Manual page 588

U10 Illegal PLC 0x0400 Number of ladder steps
Details
Software illegal interrupt
An abnormal stop occurred in the PLC program process due to an illegal code for software command.
(Note 1) The number of PLC program steps displayed on the screen may not match the actual number
of error occurrence steps because of the PLC program timing. Use this as a guideline of the
occurrence place.
(Note 2) Emergency stop (EMG) will be applied.
Remedy
Turn the power ON again.
If the error is not reset, download the correct PLC program.
U10 Illegal PLC 0x800x Number of PLC program steps
Details
Software exception
An abnormal stop occurred in PLC program process due to a bus error, etc.
bit0: BIN command operation error
bit1: BCD command operation error
(Note) The number of PLC program steps displayed on the screen may not match the actual number of
error occurrence steps because of the PLC program timing. Use this as a guideline of the
occurrence place.
Remedy
Refer to the methods for using the BCD and BIN function commands.
Details
Software exception
An abnormal stop occurred in PLC program process due to a bus error, etc.
bit6: CALL/CALLS/RET command error
bit7: IRET command execution error
(Note 1) The number of PLC program steps displayed on the screen may not match the actual number
of error occurrence steps because of the PLC program timing. Use this as a guideline of the
occurrence place.
(Note 2) Emergency stop (EMG) is applied for bit6/7.
Remedy
Turn the power ON again.
If the error is not reset, download the correct PLC program.
U50 PLC stopped
Details
The PLC program is stopped.
(Note) The number of PLC program steps displayed on the screen may not match the actual number of
error occurrence steps because of the PLC program timing. Use this as a guideline of the
occurrence place.
Remedy
Start the PLC program.
U55 PLC stopped / is not saved
Details
The PLC program is stopped and not written into ROM.
(Note) The number of PLC program steps displayed on the screen may not match the actual number of
error occurrence steps because of the PLC program timing. Use this as a guideline of the
occurrence place.
Remedy
Write the PLC program into ROM.
M700VS Series Setup Manual
Appendix 2.10 User PLC Alarms (U)
571