Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 191

Displayed items
Item
Total Capacity
Data Logging Total Capacity
Function
Setting No.1 to
10
Memory Dump Function
*1 Leaving this field blank allows the setting to be unused (0K bytes).
*2 A reduced capacity of the internal buffer decreases the extension of scan time, but it takes time to complete.
The internal buffer is also consumed in the real-time monitor function. Set the total of the internal buffer to no
more than 3072K bytes including the internal buffer to be consumed in the real-time monitor function as well.
The internal buffer for the real-time monitor function can be set with GX LogViewer. ( GX LogViewer
Version 1 Operating Manual)
The internal buffer capacity setting cannot be set in the CPU module used or the function that is not supported
by the engineering tool.
Check whether the engineering tool supports the function with availability for each model in the function list.
( MELSEC iQ-R CPU Module User's Manual (Startup))
Amount of internal buffer consumed
This value can be calculated by multiplying "Number of data points" by 2 bytes. Note, however, that additional space is
consumed by columns configured for output, as indicated below:
• Date/time column: 10 bytes
• Data collection interval column: 8 bytes
• Execution step No. column: 10 bytes
• Execution program No. column: 2 bytes
• Index column: 4 bytes
Ex.
When data logging is configured to collect as much data as one setting x 128 records and output all of the columns (i.e.,
maximum allowable configuration):
128  2 + (10 + 8 + 10 + 2 + 4) = 290 bytes
Description
Shows the total of the internal buffer capacity set in the
data logging function and the memory dump function.
Shows the total of the internal buffer capacity used for the
data logging function.
The internal buffer capacity used for each Setting No. of
the data logging settings
Set the internal buffer capacity used for the memory
dump function.
Setting range
60 to 3072K bytes

• Each setting range: 32 to 3040K bytes
*1
(in increments of 1K bytes)
• Total setting range: 32 to 3040K bytes
32 to 3040K bytes (in increments of 1K
*2
bytes)
11 DATA LOGGING FUNCTION
11.6 Steps Until the Collected Data Is Saved
Default
1536K bytes
1280K bytes
128K bytes
11
256K bytes
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