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

Operation of when a mismatch is detected
If a mismatch of the installation of the SD memory cards or the status of the write protect switch is detected, a stop error
occurs on the standby system CPU module. If a mismatch between the mounting statuses of the main base units is detected
when the CPU modules of both systems are simultaneously turned on or reset, a stop error occurs on the control system CPU
module as well.
28.6

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
External device
(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.
(1)
(3)
(2)
External device
28 FUNCTIONS
28.6 Program Execution in Both Systems
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