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
A process can be described in a programming language that suits the control function for each
POU.
Project
Project
Project
Program file
Program file
Program file
Task
Task
Task
POU
POU folder
POU
POU
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
*1
.
Registration
Program
Program
Function
Function block
4.2 POUs
4.2.1 Types of POU
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