Program Execution In Both Systems - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

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
(1) (2)
(3)
(4)
(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.
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
Item Description
Both Systems Program Set whether to execute a program only on the control system CPU module or on
Executions Setting 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.
(1)
(5)
(3)
(4)
(2)
(5)
Setting range
• Control System
Execution
• Both Systems
Executions
37.5 Program Execution in Both Systems
37
Default
Control System
Execution
37 FUNCTIONS
647