Yaskawa MP940 Reference Manual - Manual (Page 369)

Troubleshooting MotionSuite™ MP940 Machine Controller Reference Manual
10-16
A.74
A.74 is the overload alarm display for the surge current limit resistor. The
alarm output appears below.
Note: The indicates the output transistor is ON; 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
Cause Remedy
A The main circuit power has been fre-
quently turned ON/OFF. Do not repeatedly turn main cir-
cuit power ON/OFF.
B Circuit board (1PWB) defective. Replace servo amplifier.
Alarm occurs at main power
ON/OFF
A Alarm occurs at power ON B