Mitsubishi Electric MELSEC iQ-R-R00CPU - Page 191

11 DATA LOGGING FUNCTION
11.6 Steps Until the Collected Data Is Saved
189
11
Displayed items
*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
Item Description Setting range Default
Total Capacity Shows the total of the internal buffer capacity set in the
data logging function and the memory dump function.
60 to 3072K bytes 1536K bytes
Data Logging
Function
Total Capacity Shows the total of the internal buffer capacity used for the
data logging function.
 1280K bytes
Setting No.1 to
10
The internal buffer capacity used for each Setting No. of
the data logging settings
• Each setting range: 32 to 3040K bytes
(in increments of 1K bytes)
*1
• Total setting range: 32 to 3040K bytes
128K bytes
Memory Dump Function Set the internal buffer capacity used for the memory
dump function.
32 to 3040K bytes (in increments of 1K
bytes)
*2
256K bytes