Yaskawa FSP Amplifier - Manual (Page 291)

FSP Amplifier User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
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„ A.b1, A.b2
A.b1: Reference Speed Input Read Error
A.b2: Reference Torque Input Read Error
The alarm output, status, and remedy for A.b1 are the same as for A.b2.
Display and Outputs
Alarm Outputs
Alarm Code Output
ALO1 ALO2 ALO3
ALM Output
OFF OFF OFF OFF
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
During servomotor
operation
At power ON. A, B A, B, C
Cause of the Problem Solution
A
Error in reference read-in unit
(A/D Converter, etc.). Reset alarm and restart
operation.
B
Faulty reference read-in unit
(A/D Converter, etc.).
Replace servo amplifier.
C Defective circuit board (1PWB). Replace servo amplifier.