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Manipulating Files Section 5-2
Backup Files The backup function can be used to store all of the CPU Unit’s data (the entire
I/O memory, program, and parameter area) on the Memory Card without a
Programming Device. If a problem develops with the CPU Unit’s data, the
backed-up data can be restored immediately. (Not supported by CS-series
CS1 CPU Units that are pre-EV1)
Symbols Table Files The CX-Programmer can be used to save program symbols and I/O com-
ments in symbols table files called SYMBOLS.SYM in Memory Cards or EM
file memory.
Comment Files The CX-Programmer can be used to save program rung comments in com-
ment files called COMMENTS.CMT in Memory Cards or EM file memory.
5-2 Manipulating Files
The following procedures are used to read, write and otherwise work with files
using the following methods.
• Programming Devices
• FINS commands
• FREAD(700), FWRIT(701), and CMND(490) instructions in the user pro-
gram (CMND(490)
: Not supported by CS-series CS1 CPU Units that are
pre-EV1
.)
• Replacement of the entire program using AuxilIary Area control bits (Not
supported by CS-series CS1 CPU Units that are pre-EV1)
• Automatic transfer at startup
• Backup function (Not supported by CS-series CS1 CPU Units that are
pre-EV1)
5-2-1 Programming Devices (Including Programming Consoles)
The following operations are available through Programming Devices.
Use A.STD.
Operation CX-Programmer Programming
Console
Reading files (transfer from file memory
to CPU Unit)
OK OK
Writing files (transfer from CPU Unit to
file memory)
OK OK
Comparing files (compare files in the
CPU Unit and file memory)
Not possible OK
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