Cause : CU: System limit exceeded - comes when t least one system overload has been identified. Fault value (r0949, interpret decimal):

1: Computing time load too high (r9976[1]).
5: Peak load too high (r9976[5]). As long as this fault is present, it is not possible to save the parameters (p0971). See also: r9976 (System utilization)

Re fault value = 1, 5:

- reduce the computing time load of the drive unit (r9976[1] and r9976[5]) to under 100 %.

- check the sampling times and adjust if necessary (p0115, p0799, p4099).

- de-activate function modules.

- de-activate drive objects.

- remove drive objects from the target topology.

- note the DRIVE-CLiQ topology rules and if required, change the DRIVE-CLiQ topology.