Yaskawa FSP Amplifier - Manual (Page 293)

FSP Amplifier User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9-28
„ A.C2: Commutation (Phase Finding) Error
Display and Outputs
Alarm Outputs
Alarm Code Output
ALO1 ALO2 ALO3
ALM Output
ON OFF ON OFF
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
Status and Remedy for Alarm
At first motor on
sequence after power-
up, using motor with A
quad B encoder
A, B, C
Cause of the Problem Solution
A Motor parameters are faulty
Ask your local distributor for a new
parameters file.
B
The initial value of Pn191.0 (phase
order) is not correct
Set Pn191.0 to 0. (The FSP Amplifier
will automatically find the right phase
order and update this parameter value).
C
Undesired motor motion was
detected when the motor was turned
on for the first time after power-up Before turning servo on, be sure that
there is no mechanical
movements/vibrations