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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.
*1: The file size of the Q00UJCPU,Q00UCPU,Q01UCPU,and Q02UCPU is 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.
*5: The file size of the Q00UJCPU, Q00UCPU, and Q01UCPU is 89790 bytes and that of the Q02UCPU is 93630 bytes.
Figure 6.108 PLC file tab
Table6.46 Sizes of files to be stored
Data to be backed up File size
Device data
Internal user device (M, L, B, F, V, T, ST, C, D, W)
Index register (Z)/standard device register (Z)
• Serial number (first five digits) is "11042" or
earlier: 110890 bytes
*1
(When the default device assignment is set)
*2
• Serial number (first five digits) is "11043" or
later: 117310 bytes
*5
(When the default device assignment is set)
*2
Error history
SFC program continuation start information
Module error collection file (stored in system memory.)
Module error collection file (stored in standard RAM.)
File register (R, ZR)
*3
, extended data register (D)
*3
, extended link register (W)
*3
64 + 2 Number of file register points
ÉgTrace setting (sampling trace file)
*4
16 + Sampling trace file size
Selecting this option
starts backup.