Cause : Net Loss comes when control over the Modbus communications link has been interrupted or faulty communication cable.

A "Net Loss" fault with Allen-Bradley equipment typically refers to a communication issue between a drive and its controlling device.

These are the steps to correct the fault:

1. First power off drive and wait 5 min then power on.
2. Check Modbus or DSI setting.
3. Check Modbus or DSI status.
4. Check communications cabling, may be communication cable faulty.