OPTO 22 PAMUX, User Manual

Page: 75 / 155

PROGRAMING WITH THE PAMUX DRIVER
3-14 Pamux User’s Guide
READ DIGITAL BANK 7
P
URPOSE
:
Reads a bank of eight digital I/O points.
C
OMMAND
T
YPE
:
Digital
P
ARAMETERS
:
COMMAND Contains the value 7.
ADDRESS
Contains the address of the Pamux brain board.
POSITION Contains the bank number.
VALUE ARRAY
The first element of this array contains returned data in the form of a one-byte
bitmask (0–255). This bitmask specifies the status of the bank. Each bit
corresponds to one module position. If a bit is set to 1, the corresponding
module position is active (on). If a bit is set to 0, the corresponding module
position is inactive (off).
E
XAMPLE
:
This example reads back eight points at address 4 of bank 1 and then displays the resultant value
bitmask.
100 COMMAND% = 7 ‘ Read Digital Bank command
110 ADDRESS% = 4 ‘ Address of brain board
120 POSITION% = 1 ‘ Bank number
130 GOSUB 1000 ‘ Call the driver
.
.
1000 CALL Pamux(ERRCOD%,ADDRESS%,COMMAND%,POSITION%,VALUE%(0))
1010 IF ERRCOD% < 0 THEN GOTO 2000
1020 RETURN