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6 RAS FUNCTIONS
6.5 Program Cache Memory Auto Recovery Function
Precautions
Clearing the event history during execution of another function
No event history can be cleared during execution of the following functions. Check that the following functions are not being
executed and then clear the event history.
• CPU module data backup/restoration function
• iQ Sensor Solution data backup/restoration function
Reading the event history during execution of another function
No event history can be read during execution of the following function. Check that the following function is not being
executed and then read the event history.
• CPU module data restoration function
6.5 Program Cache Memory Auto Recovery Function
If the contents of memory of the CPU module have been rewritten by itself due to the factors such as excessive electrical
noise, the program cache memory recovers the corresponding areas automatically during the run of the program. This
function becomes active with RUN state of the CPU module and works during the run of the program. No special settings are
required as the system performs this task automatically.
RnCPU
RnENCPU
RnSFCPU RnSFCPU
RnPSFCPU RnPSFCPU
RnPCPURnPCPU
(Standard) (Safety)(Standard) (Safety)
(Redundant)
(Process)
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