Mitsubishi Q12PRHCPU - 8.3.5 Network Module Replacement Procedure

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8.3 Replacing Module in Redundant System
8.3.5 Network Module Replacement Procedure
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TROUBLESHOOTING
8.3.5 Network Module Replacement Procedure
(1) Network Module Replacement
The control system network module cannot be replaced while the redundant system is
running.
In this case, switch its system to the standby system, then, start the replacement
operation.
Perform replacement of the standby system's network module after switching the
standby system's power supply OFF.
The power supplies of standby systems can be turned OFF even when the redundant
system is active.
(2) Replacement Procedure
The replacement procedure for network modules is indicated in Diagram 8.31.
Diagram 8.29 System where Control System Network Module Is Replaced
Diagram 8.30 System where Standby System Network Module Is Replaced
Confirm the Network Module Targeted for Replacement
Confirm that the CPU module of the system to be replaced is the standby system (CONTROL LED
is off).When replacing the network module of the control system, make it the standby system using
GX Developer's system switching.
Refer to Section 5.2, for system switching using GX Developer.
Turn the Standby System's Power Supply OFF
Control system Standby system
Tracking cable
Replace after using GX Developer to
switch over to the standby system.
network module
GX Developer
Control system Standby system
Tracking cable
Replace after turning OFF
the standby system power.
network module
GX Developer
Start