ICP DAS USA ISaGRAF I-8437-80, Getting Started

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Getting Started: I-8437-80/8837-80/8417/8817, Jul 2020 V4.0 24
2.3 Step 3 - Writing a Simple ISaGRAF Program
We are going to use ISaGRAF to write a simple ISaGRAF example program and then download it
to the PAC to make it work. If “ISaGRAF” and “ICP DAS Utilities for ISaGRAF” have not been
installed, go back to
2. 1:Step 1 & 2. 2:Step 2 .
This example contains two programs. One is
ST program and the other is LD program.
Variables declaration:
Name Type Attribute Description
INIT Boolean Internal Initial value at
“
TRUE
”
. TRUE means 1st scan cycle
OUT01 Boolean Output Output 1
OUT02 Boolean Output Output 2
OUT03 Boolean Output Output 3
K1 Boolean Input Push button 1
K2 Boolean Input Push button 2
T1 Timer Internal Time period of blinking
ST program –
“
ST1
”
outline:
IF INIT THEN
(* Do init steps here *)
INIT:= False;
T1:= T#1500ms;
END_IF;
Project name –
“
example1
”
Group name ("Test") for projects
One ST program –
“
ST1
”
One LD program –
“
LD1
”