Cause : Ti and To unsuitable for DP cycle comes when the configured times for PROFIBUS communication are not permitted and the DP cycle is used as the actual value acquisition cycle for the safe movement monitoring functions.

Isochronous PROFIBUS: The sum of Ti and To is too high for the selected DP cycle. The DP cycle should be at least 1 current controller cycle greater than the sum of Ti and To.

No isochronous PROFIBUS: The DP clock cycle must be at least 4x the current controller clock cycle.

1. Configure Ti and To low so that they are suitable for the DP cycle or increase the DP cycle time.
2. Alternative when SI monitoring integrated in the drive is enabled (p9601/p9801 > 0): Use the actual value acquisition cycle p9511/p9311 and, in turn, set independently from DP cycle.
3. The actual values sensing clock cycle must be at least 4x the current controller clock cycle. A clock cycle ratio of at least 8:1 is recommended.