Automatic Memory Copy - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Execution method of memory copy
The following methods are available for memory copy.
Item

Automatic memory copy

Memory copy with the engineering tool
Memory copy with the special relay
and special register
Execution of memory copy
The memory copy can be executed regardless of the operating statuses (RUN/STOP/PAUSE, stop error) of the control
system and standby system CPU modules.
The automatic memory copy can be executed only in backup mode.
Automatic memory copy
The following describes the execution procedure of automatic memory copy.
To execute the automatic memory copy, turn off and on or reset the standby system CPU module while the control system is
operating.
• Set the automatic memory copy in the CPU parameter in advance. Therefore, consider the use of automatic
memory copy when determining the maintenance policy in the system design phase.
• The automatic memory copy is executed when the parameter setting has been configured for the control
system CPU module. Even if the parameter setting has not been configured for the standby system CPU
module, the automatic memory copy is executed when the parameter setting has been configured for the
control system CPU module.
Parameter
To execute the automatic memory copy, set "Auto Memory Copy Setting" to "Enable" in the CPU parameter.
[CPU Parameter]  [Redundant System Settings]  [Redundant Behavior Setting]
Window
Displayed items
Item
Auto Memory Copy Setting
28 FUNCTIONS
470
28.4 Memory Copy from Control System to Standby System
Description
Automatically executes the memory copy by the system.
CPU parameter settings are required in advance.
Executes the memory copy with an online operation of
the engineering tool that is connected to the standby
system CPU module.
Executes the memory copy with operations of the special
relay and special register.
Description
Set whether to enable the automatic memory copy function or not.
Application
Executing the memory copy without using an engineering
tool or external devices (such as a GOT)
Using the engineering tool
Executing the memory copy from external devices (such
as a GOT)
Setting range
• Disable
• Enable
Default
Disable