User`s manual

Software Reference s 41XP8400
Address Target Board
 unsigned
_
eioPlcRelayAddr( unsigned BrdAddr );
Converts bit pattern 00000000 00pqrabc to pqrc 000b 000a
where pqr is the PAL number and abc is the address of the selected
board.
PARAMETERS: The low byte of BrdAddr should contain the logical
address (8*PAL# + Board#). The board number is 063 (07 if only
the factory default PAL is used).
RETURN VALUE: The bit-mingled BUSADR address pqrc 000b
000a
for the XP8400 board.
LIBRARY: EZIOPBDV.LIB
Operate Relays
 int plcXP84Out( unsigned address, int state );
Energizes a relay on an XP8400 expansion board.
PARAMETERS: address is 8*Board# + Relay#. The board number
is 063 (07 if only the factory default PAL is used). The relay number
range is 07.
state indicates whether the relay should be energizedthe specified
relay is energized when state is non-zero, but is not energized when
state is zero.
RETURN VALUE: 0 if the specified XP8400 and relay exist, other-
wise 1. If the specified relay/board do not exist, the global variable
eioErrorCode is bit-ored with the constant EIO
_
NODEV.
LIBRARY: EZIOPBDV.LIB
The plcXP84Out driver implements other function calls such as
eioPlcAdr12, eioPlcAdr4, eioReadD0, eioReadD1, and
eioWriteWR.
Refer to Appendix A, PLCBus, for a description of these
other functions.
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