Sigma II User’s Manual
Chapter 9: Inspection, Maintenance, and Troubleshooting
9-13
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A.51
A.51: Overspeed
Display and Outputs
Note:
OFF:
Output transistor is OFF (alarm state).
ON:
Output transistor is ON.
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Output
ALM Output
ALO1
ALO2
ALO3
ON
OFF
ON
OFF
Cause of the Problem
Solution
A
Incorrect servomotor wiring.
Check and correct wiring. (Check for
U-, V-, and W-phase wiring errors.)
B
Position or speed reference input is
too large.
Lower the reference input values.
C
Incorrect reference input gain set-
tings.
Check and correct parameter set-
tings.
D
Defective circuit board (1PWB).
Replace servo amplifier.
B, C
D
A
During high-speed
At power ON.
When Servo ON (S-ON)
signal is turned ON.
servomotor rotation
after a reference input.
