Rockwell Automation 1771-DA,D17716.5.13 U MNL 1771-DA ASCII I/O MODULE - Manual (Page 186)

ASCII Module
PLC-2 Family Processors
Appendix A
AĆ18
A write (only) program for transferring data from your processor’s data
table to your ASCII device is presented with rung descriptions
(Figure A.7).
Figure A.7
Example Write (Only) Program
112
17
G
327
000
PUT
200
000
START
Loads zeros into command word one (CW1)
with switch, or first program scan
LADDER DIAGRAM DUMP
020
02
252
07
200
07
252
07
200
OFF 10
020
10
062
1.0
TON
PR 002
AC 000
062
15
020
OFF 10
U
SW1
SW1
Power-up initialization bit, reset
Energize on power-up to laod initialization
power-up initialization bit CW1
words into write BT file
Energize timer on power-up
De-energize after time-out
(Initialization words sent)
112
16
020
00
020
01
020
01
020
00
L
112
16
020
00
U
One-shot for Write BT
020
01
252
16
200
ON 16
L
020 252 200
ON 16
U
01 16
SW1-CW1 Write Handshake
L
Example Write (Only) Program