Omron OMNUC W Series Manual page 239

9 Troubleshooting
9
A.C1
A.C1: Runaway Detected
Display and Outputs
Alarm Outputs
Alarm Code Outputs
ALO1 ALO2
ON OFF
Note OFF: Output transistor is OFF (alarm state). ON: Output transistor is ON.
Status and Remedy for Alarm
At power ON
Parameter
Pn50A.1=7
Occurred 1 to 3 seconds
after power ON
Parameter
Pn50A.1= Other
than ì7î
Cause
A Servomotor wiring incorrect or discon-
nected.
B Encoder wiring incorrect or disconnected.
C Encoder is defective.
D Circuit board (1PWB) is defective.
9-28
ALM Output
ALO3
ON OFF
When servo ON (RUN)
signal turned ON
D
On speed reference input
A, B, C, D
Check wiring and connectors at Servomo-
tor.
Check wiring and connectors at encoder.
Replace the Servomotor.
Replace the Servo Driver.
A, B, C, D
A, B, C
Remedy