Mitsubishi Electric MELSEC iQ-R-R04CPU - Program Execution in both Systems

37 FUNCTIONS
37.5 Program Execution in Both Systems
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37
37.5 Program Execution in Both Systems
This function detects an error in the external device or network of the systems (control system and standby system) by
executing a program that diagnoses external devices or networks of both systems.
The program set in "Both Systems Program Executions Setting" is executed on the CPU modules of both systems.
Ex.
When an error in the external device of the standby system is notified through a continuation error
Programs whose execution type is the fixed scan execution type or event execution type and safety programs cannot be
executed in both systems.
Setting for the program execution in both systems
Configure the setting for each program to be executed on both systems.
[CPU Parameter]  [Program Setting]
Window
Displayed items
(1) The diagnostic program set as a both systems execution program is executed.
(2) An error is detected on the standby system external device by the diagnostic program.
(3) The PALERT instruction is executed, and the detailed information on a continuation error is displayed.
Item Description Setting range Default
Both Systems Program
Executions Setting
Set whether to execute a program only on the control system CPU module or on
the CPU modules of both systems.
• "Both Systems Executions" can be set for programs whose execution type is
the initial execution type, scan execution type, or standby type program.
• Only "Control System Execution" can be set for programs whose execution
type is the fixed scan execution type or event execution type and safety
programs.
• Control System
Execution
• Both Systems
Executions
Control System
Execution
(3) (3)
(4)
(4)
(1)
(2)
(1)
(2)
(5) (5)