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Sigma II User's Manual
n
A.40
A.40: Main Circuit DC Voltage Error Detected: Overvoltage
Display and Outputs
Status and Remedy for Alarm
During servomotor
operation.
When main circuit
power is turned ON.
Power supply voltage is not within the
A
range of specifications.
Load exceeds capacity of the regenera-
B
tive unit.
C
Malfunctioning regenerative transistor.
D
Defective rectifying diode.
E
Defective servo amplifier.
Alarm Outputs
Alarm Code Output
ALO1
ALO2
OFF
OFF
Note:
OFF:
Output transistor is OFF (alarm state).
ON:
Output transistor is ON.
A, B, C, D
A, D
Cause of the Problem
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
ON
OFF
When control power
is turned ON.
Solution
Check power supply.
Check specifications of load inertia
and overhanging load.
Replace servo amplifier.
9-11
E
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