Rockwell Automation 6008-SI IBM PC I/O SCNNR 6008-SI - Manual (Page 60)

Chapter 6
Discrete I/O
6-5
getbyte
Use this routine to get an 8-bit byte from the input or output image table.
Calling sequence:
value = getbyte(
inout, rack, group, hilow
);
Arguments:
inout: the constant IN (1) for input image or OUT (0) for output
image.
rack:
an integer 0 to 7, the logical rack number.
group: an integer 0 to 7, the module group number.
hilow: the logical constant HI (1) or LO (0) to select the high or low
byte. The high byte corresponds to slot 1 within a module group
(terminals 017-010), and the low byte to slot 0 (terminals 07-00).
Returned values
a character, the value of the byte.
getword
Use this routine to get a 16-bit word from the input or output image table.
Calling sequence:
value = getword(
inout, rack, group
);
Arguments:
inout: the constant IN (1) for input image or OUT (0) for output
image.
rack: an integer 0 to 7, the logical rack number.
group: an integer 0 to 7, the module group number.
Returned values:
an unsigned integer word, the value in the image table for that module
group.