Cause : Ambiguous selection of parameter set or ramp-function generator (active in all operating states)

♦ While an optimization run is in progress, the function data set selection must not be changed. Fault F041 is displayed if another, different function data set is selected while an optimization run is being executed.

♦ Check whether ramp-function generator parameter set 1 or 2 or 3 (parameters P303 to P314) is clearly selected. If parameter sets 2 and 3 are selected simultaneously for more than 0.5s, then fault message F041 is displayed. While the parameter set selection is ambiguous, the system continues to apply the last clearly identified ramp-function generator parameters.

Possible fault causes
♦ P676 or P677 (selection of binectors which determine the active function data set in control word 2, bits 16 and 17) is incorrectly set

♦ P637 or P638 (selection of binectors which determine ramp-function generator setting) is incorrectly set

Fault value:
2. The selection of the function data set has been changed during an optimization run
3. Ambiguous selection of ramp-function generator parameter set