Data Systems, Inc. Computer Hardware User Manual

PMAC2A PC104 Hardware Reference Manual

Software Setup

In order to properly setup the digital outputs an initialization PLC must be written scanning through once

on power-up/reset, then disabling itself:

OPEN PLC1 CLEAR

M32=$FF ;BITS 0-8 are assigned as output

M34=$0 ;BITS 9-16 are assigned as input

M40=$FF00 ;Define inputs and outputs voltages

M42=$FFFF ;All lines are I/O type

DIS PLC1 ;Disable PLC1 (scanning through once on

;power-up/reset)

Note:

After loading this program, set I5=2 or 3 and ENABLE PLC 1.

Acc-2P with Jumper E5 in Position 2-3

M0->Y:$C0C0,0 ; Digital Output M00

M1->Y:$C0C0,1 ; Digital Output M01

M2->Y:$C0C0,2 ; Digital Output M02

M3->Y:$C0C0,3 ; Digital Output M03

M4->Y:$C0C0,4 ; Digital Output M04

M5->Y:$C0C0,5 ; Digital Output M05

M6->Y:$C0C0,6 ; Digital Output M06

M7->Y:$C0C0,7 ; Digital Output M07

M8->Y:$C0C0,8 ; Digital Input MI0

M9->Y:$C0C0,9 ; Digital Input MI1

M10->Y:$C0C0,10 ; Digital Input MI2

M11->Y:$C0C0,11 ; Digital Input MI3

M12->Y:$C0C0,12 ; Digital Input MI4

M13->Y:$C0C0,13 ; Digital Input MI5

M14->Y:$C0C0,14 ; Digital Input MI6

M15->Y:$C0C0,15 ; Digital Input MI7

M32->X:$C0C0,0,8 ; Direction Control (1=output, 0 = input)

M34->X:$C0C0,8,8 ; Direction Control (1=output, 0 = input)

M40->X:$C0C4,0,24 ; Inversion control (0 = 0V, 1 = 5V)

M42->Y:$C0C4,0,24 ; JI/O port data type control (1 = I/O)

In order to properly setup the digital outputs, an initialization PLC must be written scanning through once

on power-up/reset, and then disabling itself: