Yaskawa Sigma II Series Servo System - Manual (Page 414)

Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
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A.C1
A.C1: Servo Run Away
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 or disconnected
servomotor wiring.
Check wiring and connectors at
the servomotor.
B
Incorrect or disconnected
encoder wiring.
Check wiring and connectors at
the encoder.
C Defective encoder. Replace servomotor.
D Defective circuit board (1PWB). Replace servo amplifier.
A A, B, C, D
A, B, C
A
D
A, B, C, D
At power ON.
When parameter
Pn50A.1 = 7.
Within 1 to 3s after
power is turned ON.
When parameter
Pn50A.1 ≠ 7.
When Servo ON (S-ON)
signal is turned ON.
When the speed reference
is entered.