Delta AH500 series Manual download pdf (Page 10)

Chapter 1 Introduction

extension backplanes at most.

1.3 Operation of the CPU module

The CPU module is the nucleus of the AH500 system. It is responsible for not only the execution of

the logic program, but also the data exchange and the processing of the communication data. The

relation between the AH500 system and the external devices are illustrated below.

System

operation

I/O

refresh

Program

operation

Input module

Output module

CPU module

AH500 system

Switch

Relay

C motor

drive

Temperature

Pressure

Electric

valve

External input

device

External output

device

The operation of the CPU module is illustrated above. The system procedures related to the

initialization, the diagnosis, and the communication, and the program procedures related to the

external interrupts and timed interrupts are simplified. Users can refer to other manuals for more

information. The operation of the CPU module is described below.

1-9

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Delta AH500 series Manual Page 10