Yaskawa MP940 - Manual (Page 388)

10.2 Troubleshooting
10-21
10
„ A.b1
A.b1: Reference Speed Input Read Error
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
„ A.b2
A.b2: Reference Torque Input Read Error
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
Alarm Outputs
Alarm Code Outputs
ALM Output
ALO1 ALO2 ALO3
OFF OFF OFF OFF
Cause Remedy
A Error in reference read-in unit (A/D
Converter, etc.). Reset alarm and restart operation.
B Reference read-in unit faulty (A/D
Converter, etc.). Replace SERVOPACK.
C Circuit board (1PWB) defective. Replace SERVOPACK.
Alarm Outputs
Alarm Code Outputs
ALM Output
ALO1 ALO2 ALO3
OFF OFF OFF OFF
C A,B
During servomotor
operation
At power ON