1
OVERVIEW
1.1 Features
1.1.4 Features of Redundant CPU
1 - 18
1
Overview
2
Performance
Specification
3
Sequence Program
Configuration and
Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files
Handled by CPU Module
6
Functions
7
Communication using
built-in Ethernet ports of
CPU module
8
Communication with
Intelligent Function
Module
1.1.4 Features of Redundant CPU
The features specific to the Redundant CPU are described below.
(1) Supporting redundant system in addition to the Process CPU functions
(a) Redundant system using Redundant CPU
With the Redundant CPU, a redundant system as a whole including base units,
power supply modules, and CPU modules (Redundant CPUs) can be configured.
The redundant system realizes high reliability since the standby system takes
over the control even if a failure occurs in the control system.
Figure 1.5 Operation of Redundant CPU
Standby system
Control system
Data tracking
During stop, power supply module,
faulty module or other module can
be changed!
Continuous operation
can be performed!
Continued with device data
used in control system
Control system
Stop!
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