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Status and remedy for alarm, A.c1, Display and outputs – Yaskawa MP940 User Manual

Page 389

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SERVOPACK Inspection, Maintenance, and Troubleshooting

10.2.1 Troubleshooting Problems with Alarm Displays

10-22

Status and Remedy for Alarm

„

A.C1

A.C1: Servo Overrun

Display and Outputs

Note: OFF: Output transistor is OFF (alarm state).

ON: Output transistor is ON.

Status and Remedy for Alarm

Cause

Remedy

A

Error in reference read-in unit (A/D
Converter, etc.).

Reset alarm and restart operation.

B

Reference read-in unit faulty (A/D
Converter, etc.).

Replace SERVOPACK.

C

Circuit board (1PWB) defective.

Replace SERVOPACK.

Alarm Outputs

Alarm Code Outputs

ALM Output

ALO1

ALO2

ALO3

ON

OFF

ON

OFF

Cause

Remedy

A

Servomotor wiring incorrect or dis-
connected.

Check wiring and connectors at servomo-
tor.

B

Encoder wiring incorrect or discon-
nected.

Check wiring and connectors at encoder.

C

Encoder defective.

Replace servomotor.

D

Circuit board (1PWB) defective.

Replace SERVOPACK.

C

A,B

During servomotor

operation

At power ON

D

A,B,C,D

A,B,C

A,B,C,D

At power ON

Parameter

Pn50A.1 = 7

Occurred 1 to 3 seconds

after power ON

Parameter

Pn50A.1 = Other

than “7"

When servo ON (/S-ON)

signal turned ON

On speed reference input