Features Of The Redundant Cpu - Mitsubishi 00JCPU User Manual

1.5.4 Features of the Redundant CPU

The features specific to the Redundant CPUs are described below.
(1) Support of the redundant system in addition to the Process CPU functions
(a) Redundant system using the Redundant CPU
Using the Redundant CPU can configure a redundant system including base units, power supply modules, and
CPU modules (Redundant CPUs).
In case of a failure of the control system, the standby system takes over the control in the redundant system,
enabling high reliability of the system.
The power supply module and faulty
module can be changed while the
programmable controller stops.
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Control system
Stop
Figure 1.22 Operation of the Redundant CPU
Standby system
Data tracking
Continues control with device
data used by the previous
control system.
New control system
Operation can be
continued.