Mitsubishi Electric MELSEC iQ-R Series User Manual page 62

Starting up the standby system
Start up the standby system while the control system keeps operating.
Follow the steps 1 to 6 in the start-up procedure for the control system to start up the standby system. ( Page 57 Starting
up the control system)
Check that the two systems are exactly the same (modules on base units, their model names, and insertion
status of the extended SRAM cassette or the SD memory card) before starting up the standby system.
1.
Powering off the system
Power off the standby system.
2.
Connecting the redundant function modules
Connect the redundant function modules of both systems with tracking cables. ( Page 62 Redundant function modules)
3.
Starting up the system
Power on the standby system.
Connect the personal computer to the control system, and execute the memory copy function (from the control system to the
standby system) using the engineering tool by following the procedure below. ( Page 405 Memory Copy from Control
System to Standby System)
[Online]  [Redundant PLC Operation]  [Redundant Operation]
Select "Memory Copy" and click the [Execute] button.
Upon completion of the memory copy function, the MEMORY COPY LED of the redundant function module in the standby
system turns on.
After that, reset the CPU module of the standby system and set it to the RUN state.
When "Auto Memory Copy Setting" has been set to "Enable" in the CPU parameter in advance, the system
can be started up only by the following operation. ( Page 425 Redundant System Operation Setting)
• Set the RUN/STOP/RESET switch of the CPU module in the standby system to the RUN position and
power on the system.
4.
Checking the LEDs
Check that the LEDs of each CPU module and redundant function module are in the following states. The following figures
show the LED status when the control system has been started up as system A. The CARD READY LED status (on or off)
depends on whether an SD memory card is inserted to the CPU module or not.
• LEDs of system A
5.
Clearing errors
If the ERROR LED of the CPU module in the control system is on, clear the error using the engineering tool. ( Page 208
Error Clear)
When "Watching Standby System Setting" of the CPU parameter was set to "Disable" in the start-up process
of the control system, the ERROR LED may be off. ( Page 425 Redundant System Operation Setting)
6.
Monitoring the program
Check that the program operates normally on the engineering tool. ( Page 68 Monitoring the Program)
5 PROCEDURE FOR STARTING UP A REDUNDANT SYSTEM
60
5.1 Overview
• LEDs of system B