Yaskawa FSP Amplifier - Manual (Page 275)

FSP Amplifier User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9-10
„ A.30: Regenerative Error Detected
Display and Outputs
Alarm Outputs
Alarm Code Output
ALO1 ALO2 ALO3
ALM Output
ON ON OFF OFF
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
Status and Remedy for Alarm
During servomotor
operation
About 1s after
main circuit power
is turned ON.
When the control
power is turned ON.
A, B D
A, B, C
Cause of the Problem Solution
A Malfunctioning regenerative transistor. Replace servo amplifier.
B Regenerative resistor is open.
Replace servo amplifier or
regenerative resistor.
C
Disconnected regenerative unit (for an
external regenerative resistor). Check the wiring of the external
regenerative resistor.
D Defective servo amplifier. Replace servo amplifier.