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CHAPTER6 FUNCTIONS
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6.30 CPU Module Change Function with Memory Card
6.30.1 Backup function to memory card
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6.30.1 Backup function to memory card
This function can save data in the CPU module to a memory card.
If a memory card is used in running system, data can be backed up by replacing the current memory card with the one
for storing a backup data.
(1) Methods
(a) Method with contacts
1) Setting
To back up data with contacts, turn on the device set in the “PLC module change setting“ screen in the PLC
system tab of the PLC parameter dialog box.
*1: The CPU module enters the STOP status at the rise of the backup start setup contact, the backup start contact cannot be turned on in the
sequence program.
*2: The backup start setup contact and backup start contact cannot be set to the same device.
*3: This indicates the default number of points. The setting range when the internal user device is set to the maximum number of points (60K
points) is M(0 to 61439) and B(0 to 0EFFF).
*4: If data to be backed up is deselected in "Backup target data", only device data and system data are backed up.
*5: The title is used for identifying backup data.
Settings for the title of the backup data stored in a memory card can be checked on the Delete PLC data screen of GX Developer.
Figure 6.114 PLC module change setting screen
Table6.51 Setting items
Item Description Setting range Default
Backup start setup
contact
*1
At the rise of the selected device among the items
shown in the right column, backup is ready to start.
Available devices
*2
• X (0 to 1FFF)
• M (0 to 8191)
*3
• B (0 to 1FFF)
*3
-
Backup start contact
At the rise of the selected device among the items
shown in the right column, backup enters
execution status.
Backup target data
Select data to be backed up stored in any of
memories shown in right column.
*4
• Program memory (drive 0)
• Standard RAM (drive 3)
• Standard ROM (drive 4)
All drives are backed up.
Format memory card
before backup
Select whether to format a memory card before
backup.
Formatted
Not formatted
Not formatted
Title setting
*5
Set a title appended to backup data stored in a
memory card.
32 characters (16 in two-byte
characters)
Set the title of the current time.
(Example) If data are backed up at 12
p.m. on October 1, 2008,
"200810011200" is set.