Siemens Micromaster 420 or MM420 Drive
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Jun 09, 2022 5:05 am
F0070 fault in siemens micromaster 420 or MM420 drive - comes when no set-point received via the communications bus during the telegram failure time.
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Jun 09, 2022 5:07 am
F0070 CB setpoint fault in siemens micromaster 420 or MM420 drive
Cause - no setpoints received via the communications bus during the telegram failure time. Triggered by A0702 /A0703 / A0704.
Diagnosis & Remedy
- check the communications module (CB) and communications partner.
- check connection to communication partners and ensure valid control word (see A0702 / A0703 / A0704)
1. Check connections to the communications board
2. Check the master
