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File Memory Section 3-2
Easy Backup Files
Note 1. Specify 8 ASCII characters. For a file name with less than 8 characters,
add spaces (20 hex).
2. Always specify the name of files to be transferred automatically at power-
up as AUTOEXEC.
3. Easy backup file names must be named BACKUP@@.
4. Supported for CS/CJ-series CPU Units with unit version 3.0 or later only.
3-2-2 Initializing File Memory
File type Contents File name Extension
Data files Words allocated to Special I/O
Units, and CPU Bus Units in the
DM area
BACKUP .IOM
CIO area BACKUPIO .IOR
General-purpose DM area BACKUPDM .IOM
General-purpose EM area BACKUPE@ .IOM
Program files All user programs BACKUP .OBJ
Parameter files PLC Setup, registered I/O tables,
routing tables, CJ-series CPU
Bus Unit settings, and Controller
Link data link tables
.STD
Unit backup
files (CJ1-H
CPU Units
only)
Data from specific Units (e.g.,
protocol macro data for a Serial
Communications Unit)
BACKUP@@ .PRM
Symbol table
files (See note
4.)
CX-Programmer global symbol
tables, local symbol tables, set-
tings for automatically allocated
areas
BKUPSYM .SYM
Comment files
(See note 4.)
CX-Programmer rung com-
ments and comments
BKUPCMT .CMT
Program index
files (See note
4.)
CX-Programmer section names,
section comments, and program
comments
CKUPPRG .IDX
File memory Initializing procedure Data capacity after
initialization
Memory Card 1.Install Memory Card into
CPU Unit.
2.Initialize the Memory
Card using a Program-
ming Device (including the
CX-Programmer and Pro-
gramming Consoles).
Essentially the specific capacity
of the Memory Card
EM file memory 1.Convert the part of the
EM Area from the specified
bank No. to the last bank
No. to file memory in the
PLC Setup.
2.Initialize the EM file
memory using a Program-
ming Device (including the
CX-Programmer and Pro-
gramming Consoles).
1 bank: Approx. 61 KB
7 banks: Approx. 445 KB
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