Main Base Unit Replacement Procedure - Mitsubishi Q12PRHCPU User Manual

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TROUBLESHOOTING

8.3.6 Main Base Unit Replacement Procedure

(1) Main Base Unit Replacement
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- 45 8.3 Replacing Module in Redundant System
8.3.6 Main Base Unit Replacement Procedure
The control system main base unit cannot be replaced while the redundant system is
running.
In this case, switching its system to the standby system, then replace that main base
unit.
Main base unit
Control system
GX Developer
Diagram 8.32 System where Control System's Main Base Unit Is Replaced
Perform replacement of the standby system's main base unit after turning the standby
system's power supply OFF.
The power supply for the standby system can be turned OFF even when the
redundant system is active.
Control system
GX Developer
Diagram 8.33 System where Standby System's Main Base Unit Is Replaced
Standby system
Tracking cable
Replace after using GX Developer to
switch over to the standby system.
Main base unit
Standby system
Tracking cable
Replace after turning OFF the
standby system power.