Cause : Defect in a monitoring channel comes when cross-comparing the two monitoring channels, the drive detected a difference between the input data or results of the monitoring functions and initiated a STOP F. One of the monitoring functions no longer reliably functions - i.e. safe operation is no longer possible. If at least one monitoring function is active, then message C01701 "SI Motion: STOP B initiated" is output.

The message value that resulted in a STOP F is displayed in r9725. The message values described involve the crosswise data comparison between processor 1 and processor 2.

1. check the setting of the gear parameters on both monitoring channels (p9521/p9321, p9522/p9322).
2. check the numerator of the gear ratio to ensure that it takes into account the motor pole pair number (p9522/p9322).