Yaskawa MP940 Reference Manual - Manual (Page 373)

Troubleshooting MotionSuite™ MP940 Machine Controller Reference Manual
10-20
A.83
A.83 is the alarm display for an absolute encoder battery error. The alarm
output appears below.
Note: The x indicates the output transistor is OFF (alarm state).
Status when Alarm Occurred
Note: No alarm occurs in the servo amplifier while running even if a battery error occurs.
Alarm Output
Alarm Code Output ALM Output
ALO1 ALO2 ALO3
x x x x
Cause Remedy
A Battery not connected.
Battery connection defective. Check and correct the battery connection.
B Battery voltage below specified
value.
Specified value:2.7V Replace the battery with only the servo
amplifier control power ON.Turn power ON
again after replacing the battery.
C Circuit board (1PWB) defective. Replace servo motor.
Alarm occurs at power ON
Pn002.2=0 or 2
Pn002.2 = 1
A, B, C
C