8 Backup Operations
8-14
CJ2 CPU Unit Hardware User’s Manual
Note 1 If the number of banks in the EM data on the Memory Card is less than the number of EM banks in the
CPU Unit where the data is to be restored (e.g., if data backed up by the CJ2H-CPU64-EIP is to be
restored at the CJ2H-CPU68-EIP), the amount of EM data on the Memory Card will be restored. On the
other hand, if the number of banks in the EM data on the Memory Card is greater than the number of EM
banks in the CPU Unit where the data is to be restored (e.g., if data backed up by the CJ2H-CPU68-EIP is
to be restored at the CJ2H-CPU64-EIP), it will not be possible to restore the data.
2 When the EM file memory function is used, the EM file memory will be restored only if the backup data is
restored to a CPU Unit of the same model. If it is restored to a CPU Unit of a different model, the data will
not function as EM file memory.
3 The BKUPIOR.IOR file will be cleared when data is restored from the Memory Card at startup. If, however,
the IOM Hold Bit (A500.12) is ON and the IOM Hold Bit Startup Hold Setting in the PLC Setup is set to
hold the setting of the IOM Hold Bit, the CIO and Work Area data and Timer Completion Flags and PVs will
be held without being cleared from the Memory Card at startup.
4 If the Forced Status Hold Bit (A500.13) is ON and the Forced Status Hold Bit Startup Hold Setting in the
PLC Setup is set to hold the setting of the Forced Status Hold Bit, the forced status will be held without
being cleared when restored from the Memory Card at startup, to a CPU Unit of the same model. If the
data is restored to a CPU Unit of a different model, the status will not be held.
When CPU Bus or Special I/O Units that support the simple backup function are connected to the CPU
Unit, the data in the CPU Bus or Special I/O Units will also be backed up by the simple backup opera-
tion. Data in the CPU Bus and Special I/O Units is backed up separately for each Unit.
Note If the file does not exist when restoring data from the Memory Card to I/O memory, an error will not occur at
the CPU Unit but the data will not be restored to the CPU Bus or Special I/O Unit and an error will occur at
the CPU Bus or Special I/O Unit. For details on errors that occur at a CPU Bus or Special I/O Unit, refer to
the operation manual for the specific Unit.
Data in individual Units is saved to the Memory Card under the following file names.
Note The unit address is determined as follows:
• Built-in EtherNet/IP (CJ2H-CPU@@-EIP) or CPU Bus Unit: Unit number + 10 hex
• Special I/O Unit: Unit number + 20 hex
DM Area D00000 to D19999
Ye s Ye s N o
BACKUPDM .IOM
EM Area (See notes
1 and 2.)
E@_0 to E@_32767
(@: Bank No. 0 to 18.
The maximum bank
number depends on
the CPU Unit model.)
Ye s Ye s N o
BKUPEM@ .IOM
EM Area (forced
status) (See note 4.)
Only when bits are
force-set/reset in auto-
matically allocated
areas.
Ye s Ye s N o
BKUPEF@ .IOM
Unit Backup Data
Contents Backup Restore Compare File name Extension
Data in Unit with unit address @@ (The
contents depend on the Unit.)
Ye s Ye s Ye s B A C K U P @@ .PRM
I/O memory
Backup Restore Compare File name Extension
Area Addresses
BACKUP .PRM
Unit address of Unit/Board (hex)
File name:
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