is this scaling of analog input PIW290?
It is the Analog input from the field.
HI_LIM is the upper value of the range of the instrument
LO_LIM is the lower value of the range of the instrument
BIPOLAR = FALSE means the IN cannot go negative you have only positive values.
RET_VAL is used to detect broken wire in 4-20 mA or conversion problems. 16#8000 is a broken wire.
OUT (#outval) is the out of the FC must be a REAL
MD84 must be REAL in order to have a consistent number.