Mitsubishi Electric QD77MS User Manual page 930

Classification Error
Error name
of errors code
Encoder
1201 OPR data incorrect
errors
Absolute SSCNET
1205
position communication error
Servo
2999 Stepping driver fault
amplifier
Error
• The backup data for absolute position
restoration is illegal.
• The home position return has never been
executed after the system start.
• The home position return is started, but
not completed correctly.
• The servo alarm "Absolute position
erased" (alarm No.: 25) or the servo
warning "Absolute position counter
warning" (warning No.: E3) occurred.
• The servo parameter "Rotation direction
selection/travel direction selection (PA14)"
is changed.
Data received from servo amplifier is in
error.
Hardware is faulty.
16 - 50
Chapter 16 Troubleshooting
Operation status at error occurrence
The operation continues.
The operation continues.
At start : The system does not
operate.
During operation : The system stops
immediately.