Technical FAQs

Ask a Question

Why ASF LED Indication is On in Altivar Process Drive

ASF LED Indicates that the safety function is activated. Status of LED at different events is as follows:

Possible causes are exceeded delay between STOA and STOB signals > 1 s and internal hardware detected error. Please Verify the wiring of the digital inputs STOA and STOB.

For more details on safety function of ATV630/650 please refer the Safety Function Manual. You can download it from the Following Link:

Was this helpful?
What can we do to improve the information ?