Yaskawa Sigma II Series Servo System - Manual (Page 401)

Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9 - 13
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.
During high-speed
At power ON.
When Servo ON (S-ON)
signal is turned ON.
servomotor rotation
after a reference input.
A
B, C
D