7-15
7 File Operations
CJ2 CPU Unit Software User’s Manual
7-3 File Memory Operations
7
7-3-2 File Memory Operating Procedures and File Memory
Files
Read, write and other operations can be performed on these files using the CX-Programmer, FINS
commands, instructions, and Auxiliary Area bits.
The file names are user-defined.
*1 For ********, set eight ASCII characters or less.
*2 Supported only by the CJ2H-CPU6@-EIP and CJ2M-CPU3@.
*3 The text and CSV data files can be read and written only by using FWRIT(701) and FREAD(700) instructions. They can-
not be read or written from the CX-Programmer.
General-purpose Files
File type
File name
*1
Exten-
sion
Content Description
Program/network
symbol file
******** .OBJ • User program
• Network symbols
*2
Programs and network symbols in cyclic tasks
and interrupt tasks of the CPU Unit.
Parameter file ******** .STD • PLC Setup
• Registered I/O
tables
• Routing tables
• CPU Bus Unit Setup
Area
• Parameter area data in the CPU Unit
• The user does not need to differentiate the
data in the file.
Data file ******** .IOM Specified range of I/O
memory
• Data in word (16-bit)
increments in one
area from the start
word to the end
word.
• The area can be
CIO, HR (Holding
Area), WR (Work
Area), AR (Auxiliary
Area), DM (Data
Memory), or EM
(Extended Memory).
Binary data format
.TXT Text format (no delim-
iter or tabs)
*3
.CSV CSV format (comma
delimited)
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