Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 428

Starting up the standby system
Start up the standby system while the control system keeps operating.
Follow step 1 to 6 in the start-up procedure for the control system to start up the standby system. ( Page 424 Starting up
the control system)
Check if the model of the module which is mounted on the base unit and insertion of the extended SRAM
cassette or SD memory card are the same between the control system and standby system before the starting
up.
1.
Powering off the system
Power off the standby system.
2.
Wiring the redundant function modules
Connect the redundant function modules of both systems with tracking cables. ( Page 428 Wiring the redundant function
modules)
3.
Starting up the system
Power on the standby system.
Connect the personal computer to the control system and copy the memory of the control system to the standby system with
the engineering tool by following the procedure described below. ( Page 468 Memory Copy from Control System to
Standby System)
[Online]  [Redundant PLC Operation]  [Redundant Operation]
Select "Memory Copy" and click the [Execute] button.
When copying the memory is completed, the MEMORY COPY LED of the redundant function module of the standby system
turns on.
After that, reset the CPU module of the standby system and set it to the RUN state.
If "Auto Memory Copy Setting" has been set to "Enable" in the CPU parameter settings in advance, the
system can be started up only with the following operation. ( Page 485 Redundant System Operation
Setting)
• Set the RUN/STOP/RESET switch of the CPU module of the standby system to the RUN position and
power on the system.
4.
Checking the LEDs
Check that the LEDs of the CPU module and redundant function module are in the following states. The following figure
shows the LED status when the control system has been started up as the system A. The CARD READY LED status depends
on whether an SD memory card has been installed to the CPU module or not.
• LEDs of System A
27 PROCEDURE FOR STARTING UP A REDUNDANT SYSTEM
426
27.1 Overview
• LEDs of System B