Internal Buffer - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Internal buffer

The internal buffer is a system area used to temporarily store collected data.
The collected data is temporarily stored in the internal buffer and stored in the specified data storage destination memory at
the time of a file save operation.
Internal buffer capacity setting
RnPCPU
RnCPU RnENCPU
(Process)
• This function cannot be used in the R00CPU.
Set the capacity of the area (internal buffer) used by the system to temporarily store the results of data logging and memory
dump processing. The capacity can be set individually for each data logging setting number (1 to 10).
[CPU Parameter]  [Memory/Device Setting]  [Internal Buffer Capacity Setting]
For trigger logging, increasing the internal buffer capacity allows an increase in the number of collected data before trigger
and also helps to prevent processing overflow. If the free space in the internal buffer is still insufficient after increasing the
internal buffer capacity, use the following workarounds:
• Increase the data collection interval or timing.
• Reduce the number of data records to be collected.
• Lower the frequency of file switching.
Window
11 DATA LOGGING FUNCTION
188
11.6 Steps Until the Collected Data Is Saved
RnPCPU RnPSFCPU RnPSFCPU RnSFCPU RnSFCPU
(Redundant) (Standard) (Safety) (Standard) (Safety)