Siemens Micromaster 420 or MM420 Drive
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Jul 01, 2024 6:37 am
Cause : No Data from USS (RS485 link) during Telegram Off Time comes when the drive isn't receiving the necessary commands or instructions from the USS master device (usually a PLC or HMI) to control the motor.
The F0072 fault in siemens micromaster 420 drive indicates No Data from USS (RS485 link) during Telegram Off Time. This means there is no response during telegram off time.
- Check connections to the communications board.
- Check the master.
