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(1) Backup data file
After data are backed up, a backup data file "MEMBKUP0.QBP" is created in a memory card or SD memory card.
Only one backup data file can be stored to each card. If a backup data file has existed in the card, the data in the
file are overwritten whenever the backup operation is performed.
*1*2
*1 If there is no parameter file in the CPU module where the backup data are restored, and there is a parameter file in the
memory card or SD memory card, the CPU module operates using the parameter settings in the card.
*2 When data are backed up to a Flash card, only a backup data file is stored. (Other files cannot be stored.)
To delete a backup data file, perform the following operation using a programming tool.
[Online] [Delete PLC Data]
(2) Backup data details
(a) Backup target data
The following table lists the backup target data.
*1 Data in the program cache memory are backed up.
*2 Only data in the latch relay (L) and devices to which the latch range can be set are backed up.
*3 When an extended SRAM cassette is used, data in the cassette are also backed up.
Backup data (drive) Description Backup selection by the user
Program memory (drive 0)
All data in the program memory (drive 0)
*1
Selectable
Standard RAM (drive 3)
*3
All data in the standard RAM (drive 3)
Standard ROM (drive 4) All data in the standard ROM (drive 4)
Device data
*2
Internal user device
(L, B, F, V, T, ST, C, D, W)
Not selectable
(Data are automatically backed up by the
system.)
System data
Data managed by the system (such as error
history)
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