Mitsubishi Electric MELSEC Q Series Programming Manual page 517

APPENDICES
Control mode
Error
code
901
902
(5) System errors (900 to 999)
These are errors detected at the power-on.
The error codes, causes, processing and corrective actions are shown in Table
1.7.
Table 1.7 System error (900 to 999) list
Error cause
• The motor travel value while
the power is off exceeded
the "System setting mode-
allowable travel value during
power off" set in the system
settings at the turning on of
the servo amplifier.
• At VC (CKD Nikki Denso)
power-on, ABS/INC setting
in "System Setting" differs
from the installed servo
driver setting. (Check when
VC is used only).
APP - 26
Error
Corrective action
processing
• Check the position.
• Check the battery of encoder.
Further
operation is
possible.
Further • Correct ABS/INC setting in
operation is "System Setting".
possible
according to
servo driver
setting.