For The Standby System In A Redundant System Configuration - Mitsubishi Electric MELSEC iQ-R Series User Manual

For the standby system in a redundant system configuration

This section describes the procedure of replacing the remote head module of the standby system in a redundant system
configuration
The remote head module of the standby system can be replaced while the remote head module of the control system controls
the system at power-on (online).
1.
Check that the remote head module to be replaced is set to the standby system (the CTRL LED turns off). To replace the
remote head module of the control system, switch the module to the standby system using the engineering tool.
 GX Works3 Operating Manual
2.
Disconnect the Ethernet cable from the remote head module to be replaced.
 MELSEC iQ-R CC-Link IE Field Network Remote Head Module User's Manual (Startup)
3.
Set the switch of the remote head module of the standby system to the STOP position.
4.
Remove the remote head module of the standby system from the main base unit.
 MELSEC iQ-R Module Configuration Manual
5.
Set the switch of the remote head module to be replaced to the STOP position.
6.
Mount the remote head module to be replaced on the main base unit.
 MELSEC iQ-R Module Configuration Manual
7.
Reset the replaced remote head module of the standby system.
8.
Check that the RUN LED of the remote head module of the standby system turns on, and that power is being supplied
normally.
9.
When a file mismatch was detected by the consistency check between systems, memory copy from the control system to
the standby system is automatically executed. Then, the remote head module of the standby system is automatically
reset, and the system is restarted.
10.
Connect the Ethernet cable to the remote head module.
 MELSEC iQ-R CC-Link IE Field Network Remote Head Module User's Manual (Startup)
11.
Set the switch of the remote head module of the standby system to the same position as that of the remote head module
of the control system.
When the remote head module of the standby system is removed, a minor error occurs in the remote head
module of the control system. Replace the remote head module of the standby system, and clear the error in
the remote head module of the control system if required.
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4.5 Replacing the Remote Head Module