AL.502 STO B signal lost or error – Delta servo troubleshooting

<= See All alarms of Delta servo

Name Description ALM WRN SRV ON Clear


STO B lost

STO_B lost (signal loss or signal error)   NO Cycle power on

Causes Checking Method Actions
Loss of STO_B signal or STO_A and STO_B signals are not synchronized for more than 1 second. Make sure the wiring of STO_B is correct.

Cycle power on the servo drive.

(The above information is referenced from Delta Electronics IMSBU)

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Other reasons Checking Method Actions

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