Mitsubishi Electric melsec q00ujcpu User Manual page 293

When backing up the data in the file register, extended data register (D), and extended link register (W), pay attention to the
following.
• The data are backed up only when the file register in the standard RAM is set to be used.
• Select "Transfer to Standard ROM at Latch data backup operation." on the PLC file tab of the PLC parameter
dialog box.
(3) File size for storing backup data
The system automatically creates storage file for backup data when the latch data backup function to standard
ROM is performed.
Table6.46 shows the size of storage file.
Internal user device (M, L, B, F, V, T, ST, C, D, W)
Device data
Index register (Z)/standard device register (Z)
Error history
SFC program continuation start information
*3
File register (R, ZR) , extended data register (D)
ÉgTrace setting (sampling trace file)
*1: The file size of the Q00UJCPU,Q00UCPU,Q01UCPU,and Q02UCPU are 87210 bytes.
*2: The size depends on the parameter setting.
*3: Storage files are created only when data in the file register, extended data register (D), and extended link register (W) are backed up.
*4: Storage files are created only when the trace registration has been made.
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Selecting this option
starts backup.
Table6.46 Sizes of files to be stored
Data to be backed up
*3
, extended link register (W)
*4
Figure 6.108 PLC file tab
110890 bytes
(When the default is set to the device assignment
setting)
*3
64 + 2
16 + Sampling trace file size
File size
*1
*2
Number of file register points