Redundant Group Setting; Redundant Module Group Settings - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Redundant group setting

The redundant group setting is used to ensure that when the Ethernet network is duplicated in a redundant system, system
switching is not executed for an error that occurs in one network.
There are two types of redundant group setting: redundant module group setting and port group setting.
The redundant group setting is not available for the CPU module (built-in Ethernet port part).

Redundant module group settings

This setting ensures that, by mounting two RJ71EN71s, on each of the control and standby systems, even if a communication
error occurs in one of the RJ71EN71s, as long as communication is possible using the network of the other RJ71EN71,
system are not switched and communication by the control system continues.
The redundant module group can be set only on modules that have adjacent start I/O numbers and are mounted on adjacent
slots of the base unit.
When both grouped RJ71EN71s have a communication error, a system switching request is issued.
■Setting procedure
The redundant module group is set using system parameters
[Navigation window]  [Parameter]  [System Parameter]  [I/O Assignment] tab  [Redundant Module Group
Setting]
If the RJ71EN71s set as a redundant module group are not mounted adjacently to each other on the base
unit, an error occurs. Check the mounting positions on the base unit and the start I/O number again.
1 FUNCTIONS
1.17 Redundant System Function
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