Boot Operation - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

28.13

Boot Operation

This section describes precautions on using the boot operation in the redundant system.
Boot operation at start-up of the redundant system
Use the boot operation only to simultaneously start up both systems.
1.
Attach SD memory cards that have boot setting data to both systems.
2.
Simultaneously turn on or reset both systems and perform the boot operation for them.
Do not use the boot operation to restart one system. If only one system is restarted with the boot operation, a system
consistency check error may occur. The following operations are recommended.
• Remove the SD memory cards for boot operation after simultaneously starting up both systems.
• When using an SD memory card for other applications, such as the data logging function, prepare another one.
Online change in boot operation
It is recommended to remove SD memory cards for boot operation while the system is operating. Do not perform the online
change (online change (ladder block)). To copy project data to an SD memory card for boot operation, set the CPU module in
the STOP state and write the project data to the SD memory card.
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28.13 Boot Operation
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