Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 597

• Check the operation of safety programs and standard programs.
2.
Switching the safety operation mode
Switch the safety operation mode to SAFETY MODE to run the system normally as a system using the SIL2 Process CPU.
Set the SIL2 Process CPU to the STOP state before switching the mode. ( Page 655 Switching Safety Operation Mode)
Setting the SIL2 Process CPU to the STOP state causes a continuation error due to the operating status
mismatch and the error is detected in the standby system.
3.
Executing a program
Power off the SIL2 Process CPUs and remote head module in both systems. After powering off, set the RUN/STOP/RESET
switch of the SIL2 Process CPU and remote head module in both systems to the RUN position and power on the systems.
Check that the PROGRAM RUN LED on the SIL2 Process CPU in the control system turns on.
Individually setting the RUN/STOP/RESET switch of each CPU module to the RUN position with the CPU
module powered on causes a continuation error due to the operating status mismatch and the error is
detected in the standby system.
4.
Monitoring the program
Check that the program is normally running on the engineering tool.
Starting up the standby system
When only the control system is started up first, start up the standby system subsequently.
When both systems are started up simultaneously, this procedure is not required.
Start up the standby system while the control system keeps operating.
Perform the same procedures as those for starting up the control system.
Page 590 Installing/mounting/inserting procedure
Page 590 Wiring procedure
Perform step 1, 3, and 4 for the following procedure.
Page 592 Procedure for the SIL2 Process CPU side
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 597 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 637 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 SIL2 Process CPU of the standby system and set it to the RUN state.
36 PROCEDURE FOR STARTING UP A SYSTEM USING THE SIL2 PROCESS CPU
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36.1 Overview