Chapter 8 Hardware Configuration
8.2 Setting Interrupts
8.2.1 Program Architectures
AH500 series PLCs uses IEC 61131-3. In the IEC 61131-3 architecture, a program is divided into several
program organization units (POUs). Every program organization unit can be developed independently, and
can be assigned a task.
The Classic architecture and the IEC 61131-3 architecture are shown below.
The figure below is a project created in ISPSoft. Program 4 is a POU of the function block type. The cyclic
programs and the interrupt program are POUs of the program type.
The interrupts supported by AH500 series CPU modules will be introduced in the following sections. Please
refer to ISPSoft User Manual for more information about creating interrupts, and writing programs.
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