Memory Copy From Control System To Standby System - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

When data is different between the control system and the standby system
Store the same program, FB file, CPU parameter, and global label setting file in the control system CPU module and the
standby system CPU module for tracking transfer. ( Page 468 Memory Copy from Control System to Standby System)
If there is any difference, global devices, system data, and PID control instruction information are transferred.
28.4
Memory Copy from Control System to Standby
System
This function transfers data such as parameters and programs in the CPU module of the control system to the CPU module of
the standby system to maintain the consistency of the memory in the two CPU modules.
Ex.
Replacement of the standby system CPU module using the memory copy
(1) Remove the standby system CPU module.
(2) Mount a new CPU module.
(3) Execute the memory copy to match the memory contents of the control system CPU module and the standby system CPU module.
The following memories are available for the memory copy.
• Program memory
• Device/label memory (copying only the file area of file register)
• Data memory (copying only the files in the system folder ($MELPRJ$))
• SD memory card (copying only the files in the system folder ($MELPRJ$))
The memory copy is executed on memories that have differences between the control system and the standby system. It is
not executed on memories without difference between the systems.
For the module replacement method and maintenance procedure using the memory copy, refer to the
following.
Page 516 Module Replacement in the Redundant System
28 FUNCTIONS
468

28.4 Memory Copy from Control System to Standby System

(1)
(3)
(2)