Rockwell Automation 1747-PTxx Getting Started Guide for HHT - Manual (Page 48)

A–B
A Appendix
Getting Started Guide
for HHT
A–1
Additional Ladder Program Exercises
This appendix lets you apply what you have learned in the previous chapters.
It covers:
•
Entering a program with input and output branches
•
Entering a program with a timer instruction
The important feature of this program is the output and input branch. The
input branch is based on what is called OR or parallel logic. This means that
if either input #0 OR input #1 is true, then output #0 and #1 turn on. If the
rung is true, all outputs will be energized. If the rung is false, all outputs will
be de–energized.
We will be editing the program created in chapter 3 to look like the one
shown in the display below. It will consist of one input branch and one
output branch.
<END>
F1 F2 F3 F4 F5
] [ ( )
] [ ( )
I:1/1
I:1/0
O:3/1
O:3/0
Creating the Program
1. Start from the main display, which you ended with in chapter 4, Online
Operations.
SLC 500 PROGRAMMING SOFTWARE Rel. 2.03
1747 – PTA1E
Allen–Bradley Company Copyright 1990
All Rights Reserved
F1 F2 F3 F4 F5
PRESS A FUNCTION KEY
SELFTEST TERM PROGMAINT
OFL
UTILITY
2. Press the following function keys (in order): [F3] – PROGMAINT , then
[F3] – EDT_FIL .
3. Enter the file number, which is 2 . Then press [ENTER] . The program
entered in chapter 3 is displayed.
F1 F2 F3 F4 F5
>
2.0.0.0.*
INS_RNG MOD_RNG SEARCH DEL_RNG UND_RNG
OFL
<END>
] [ ( )
Entering Input and Output
Branches