Specifications

4.2 POUs
4.2.1 Types of POU
4-5
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PROGRAM CONFIGURATION
4.2 POUs
A POU (abbreviation for Program Organization Unit) is a program component defined by each
function.
4.2.1 Types of POU
The following three types can be selected for each POU according to the content to be defined.
• Program
• Function
• Function block
Each POU consists of a program and local labels
*1
.
A process can be described in a programming language that suits the control function for each
POU.
*1: Local labels are labels that can be used only in programs of declared POUs. For details
of local labels, refer to the following section.
Section 4.3.2 Local labels
Project
Project
Program file
Program file
Tas k
Task
Project
Program file
Tas k
POU folder
POU
Program
POU
Program
POU
Function
POU
Function block
Registration