Error message

MC change from SOM_2/SOM_3 to SOM_4 not possible

MC change from SOM_4 to SOM_2/SOM_3 not possible

Cause of error

- Safety-related mode of operation SOM_1 not selected
- E.g. keylock switch 1 not in SOM_1 position

Error correction

- Select safety-related mode of operation SOM_1
- E.g. keylock switch 1 in SOM_1 position