l
From the variable properties dialog, select
Retain
, and click
OK
.
Creating a Programming Organization Unit
Logical Program Organization Units (POUs) are the language
elements of a program. They are small, independent software units
containing the program code. The name of a POU must be unique
within the project.
There are three different POU types:
n
Program
: contains a logical combination of function or function
block calls. Programs have input and output parameters and they
can have an internal memory.
n
Function Block
: POUs with multiple input/output parameters and
internal memory.
n
Function
: POUs with multiple input parameters and exactly one
output parameter.
To create a POU
1.
Click
IEC Programming Workspace
from the toolbar, or from Home
Page, click
Program with IEC61131-3
.
2.
From the
Project Tree Window
, right-click
Logical POUs
and select
Insert
>
Program
/
Function Block
/
Function
, the
Insert
dialog appears.
3.
Enter the
Name
for the new POU.
62
Chapter 4 - Software
Summary of Contents for ControlEdge 2020 SC-TEPL01
Page 28: ...Figure 3 8 Single star topology 28 Chapter 3 Hardware ...
Page 40: ...40 Chapter 3 Hardware ...
Page 66: ...66 Chapter 4 Software ...
Page 114: ...114 Chapter 6 Communication ...
Page 126: ...126 Notices ...