Replacement Procedures Of Extension Cable - Mitsubishi Q12PRHCPU User Manual

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TROUBLESHOOTING

8.3.10 Replacement Procedures of Extension Cable

(1) Replacement of extension cable
An extension cable which connects the main base unit and the redundant type
extension base unit of the control system cannot be replaced during operation of the
redundant system.
Before replacing the extension cable, always switch the control system to the standby
system by GX Developer.
(2) Replacement procedures
The replacement procedure of the extension cable is shown in Diagram 8.37.
Checking the system where the extension cable to be replaced is connected
Check that the extension cable to be replaced is connected to the standby system (CONTROL LED
is turned OFF).
When connecting an extension cable of the control system, switch system to the standby system
by GX Developer.
Turning OFF power supply of standby system
Replacement of an extension cable of the standby system
Disconnect an extension cable from the main base unit.
Connect the extension cable to be replaced to the main base unit.
Turning ON power supply of standby system
(1) Check that RUN/STOP switch of the standby system CPU module is set to RUN/STOP
position.
(2) Check that RESET/L. CLR switch of the control system CPU module is set to center position
(reset cancel).
(3) Turn ON power supply of the standby system.
Checking POWER LED of the power supply module
Check that POWER LED of the power supply module is turned ON (green) and power supply is
supplied normally.
Start
Start standby system
Diagram 8.37 Replacement Procedures of Extension Cable
8.3.10 Replacement Procedures of Extension Cable
8.3 Replacing Module in Redundant System
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