When One System Is Started Automatically Even Though A Tracking Communication Error Has Occurred - Mitsubishi Electric MELSEC iQ-R Series User Manual

When one system is started automatically even though a tracking
communication error has occurred
In a redundant system without extension base units
cables at start-up, the CPU module enters the state that waits for the other system to start. The following shows examples,
such as a system configuration and a program, to start up either of two systems using external signals without waiting for the
other system to start, and prevent both systems from operating as control systems.
*1 In a redundant system with redundant extension base unit, even when the other system is powered off or there is an error with tracking
cables at start-up, either of two systems starts up without waiting for the other system to start.
*2 Instead of configuring the system described below, configuring a redundant power supply system is recommended when taking a
measure against failure of the power supply module in the other system.
In a redundant system with redundant extension base unit, the "Control System Start-up Setting (Input (X))" is disabled.
When using this program example, do not power off and on or reset the CPU module of each system in
separate mode. Change the mode to the backup mode before powering off and on or resetting the CPU
module.
System configuration
The following figure shows a configuration example of the system.
(1) (2) (3) (4) (5)
(1) Power supply module (R62P)
(2) CPU module (RnPCPU)
(3) Redundant function module (R6RFM)
(4) Input module (RX40C7)
(5) Output module (RY40NT5P)
(6) Tracking cable
*1
, when the other system is powered off
(1)
(6)
11 BASIC CONCEPT OF REDUNDANT SYSTEM
*2
or there is an error with tracking
(2) (3) (4) (5)
11.6 System Determination
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