Returns an error code
is the error code
to linux errno error code, 0 is ok
_IEC_RESULT Error code
action ErrorCode DCP_Error [...] active xError BOOL TRUE: error occurred
aborts action ErrorCode [...] Function block active xError BOOL TRUE: error
by application code set x [...] is opened. xError BOOL FALSE Error occured
system error code (see CmpErrors [...] if the result code is ERR
system error code (see CmpErrors