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F0070 fault in siemens micromaster 420 or MM420 drive

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(@click2electro)
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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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Posts: 12492
Admin
Topic starter
(@click2electro)
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Joined: 3 years ago

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

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