Cause : Fieldbus interface setpoint timeout comes when the reception of setpoints from the fieldbus interface has been interrupted.

- bus connection interrupted.
- communication partner switched off.

For PROFIBUS:
- PROFIBUS master set into the STOP state. See also: p2040 (Fieldbus interface monitoring time), p2047 (PROFIBUS additional monitoring time)

Ensure bus connection has been established and switch on communication peer.