Yaskawa MP940 Reference Manual - Manual (Page 378)

MotionSuite™ MP940 Machine Controller Reference Manual Troubleshooting
10-25
A.b1
A.b1 is the alarm display for the speed reference input read error alarm. The
alarm output appears below.
Note: The x indicates the output transistor is OFF (alarm state).
Status when Alarm Occurred
Alarm Output
Alarm Code Output ALM Output
ALO1 ALO2 ALO3
x x x x
Cause Remedy
A Part malfunctioned in reference read-in unit
(A/D converter, etc.). Reset alarm and restart operation.
B Part defective in reference read-in unit
(A/D converter, etc.). Replace servo amplifier.
C Circuit board (1PWB) defective. Replace servo amplifier.
Alarm occurs at power ON C
Alarm occurs during motor
operation
A,B