Operation Of The Cpu Module - Delta AH500 series Quick Start Manual

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.
External input
device
Switch
Temperature
Pressure
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.
AH500 system
CPU module
System
operation
I/O
refresh
Program
operation
Ch ap te r 1 In tro duc tio n
External output
device
Relay
AC motor
drive
Electric
valve
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