Yaskawa MP940 Reference Manual - Manual (Page 374)

MotionSuite™ MP940 Machine Controller Reference Manual Troubleshooting
10-21
A.84
A.84 is the absolute encoder data alarm display. 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 Absolute encoder malfunctioned Replace servo amplifier if error
occurs frequently.
B Circuit board (1PWB) defective. Replace servo amplifier.
Alarm occurs at power ON
Pn002.2=0 or 2
Pn002.2 = 1
A
B
Alarm occurs during
operation
Pn002.2=0 or 2
Pn002.2 = 1
A
B