9 Backup Functions
9-26
NJ-series CPU Unit Software User’s Manual (W501)
9-4 Automatic Transfers from SD
Memory Cards
This function automatically transfers the data in a backup file to the Controller when the power supply is
turned ON. The backup file must be stored in the /autoload directory on the SD Memory Card in the
CPU Unit. You can use this to operate the CPU Unit with the data in a backup file on the SD Memory
Card. The only way to perform this operation is to use the front-panel DIP switch on the CPU Unit.
The automatic transfer uses a backup file that is created with the backup function and an automatic
transfer command file. Save both files in the /autoload directory in advance.
The following tables gives the procedure, the applicable directory, and the timing at which the transfer is
executed.
• When the power is turned ON, the data in the backup file in the /autoload directory on the SD Mem-
ory Card is automatically transferred to the Controller.
• The automatic transfer function transfers the data in the data groups that are specified in the Autload-
Command.ini file in the /autoload directory. Refer to 9-11-4 Specifications of an Automatic Transfer
Command File for details on the automatic transfer command file.
• If an AutoloadCommand.ini file is not in the /autoload directory on the SD Memory Card, all of the
data from the backup file in the /autoload directory that can be transferred will be transferred.
• The operating mode that is set in the Startup Mode setting in the Controller Setup is used after com-
pletion of the automatic transfer.
• While the data is being automatically transferred, the CPU Unit will be in startup state.
• If an error occurs in the checks that are performed before starting the automatic transfer, the previous
data will be retained in the Controller.
• If the power supply to the Controller is interrupted while the data is being automatically transferred, a
User Program/Controller Configurations and Setup Transfer Error (a major fault level Controller error)
will occur. If that occurs, the data in the Controller is not dependable. Use one of the following meth-
ods to clear the error.
File Function
Backup file This file contains the Controller data that is handled by the functions that are
related to data backup.
Automatic transfer command
file
This file specifies the data groups to transfer when transferring data from a SD
Memory Card. You can edit this file with a text editor on a computer to specify
the data groups to transfer.
Procedure Directory
Execution tim-
ing
CPU Unit front-panel DIP
switch
/autoload directory on the SD Memory Card At startup
Processing Contents
Backup file and automatic
transfer command file
Data that is
backed up
/autoload
Set the DIP switch
pins to OFF, ON,
OFF, and OFF, and
then turn ON the
power.
ControllerSD Memory Card
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