Festo SFC-LAC CO Series, Manual, Page: 314 / 328

C. Object directory DS204 and CI
C−42
Festo P.BE−SFC−LAC−CO−EN en 0708NH
Permitted value ranges Transferred parameters and values are checked by the
SFC−LAC before being accepted.
Note
In the case of invalid parameters or values, an error
message will not appear in the response; rather, the
transferred value will always be returned (echo).
Invalid parameters will not be accepted.
Values outside the permitted value range will be limited
to the nearest valid value.
Recommendation
Check that values and parameters have been written correctly
by downloading the current contents of the parameter or
value with one of the following Read commands:
Transmission faults If there are faults in transmission (e. g. syntax faults,
transmission faults), the value <0xFF> will be transmitted
instead of the usual reply.
Possible causes:
incorrect initial character, separating character or empty
character
incorrect hex digit
incorrect value type.