cause : STOP D initiated comes when the drive is stopped via a STOP D (braking along the path). "Safe Operating Stop" (SOS) is activated after the parameterized time has expired.

Possible causes:
- stop request from the higher-level control.
- subsequent response to the message C01714 "SI Motion CU: Safely-Limited Speed exceeded".
- subsequent response to the message C01715 "SI Motion CU: Safely-limited position exceeded".
- subsequent response to the message C01716 "SI Motion CU: tolerance for safe motion direction exceeded".

- remove the cause of the fault at the control.
- carry out a diagnostics routine for message C01714/C01715/C01716.