Omron CJ1G-CPU series, Programming Manual

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Manipulating Files Section 5-2
The CMND(490) (DELIVER COMMAND) instruction can be executed to issue
a FINS command to the CPU Unit itself to perform file operations. File opera-
tions such as file formatting, deletion, copying, and renaming can be per-
formed on files in the Memory Card or EM file memory (Not supported by CS-
series CS1 CPU Units that are pre-EV1).
FREAD(700)/FWRIT(701) Instructions
FREAD(700) and FWRIT(701) transfer data between I/O memory and file
memory. All CJ CPU Units can transfer binary data (.IOM files) and the V1
CPU Units can also transfer ASCII files (.TXT and .CSV files).
FREAD(700)/FWRIT(701): Transfers
between I/O memory and file memory
CPU Unit
FREAD/FWRIT
instruction
I/O memory
I/O memory
Memory Card
EM file memory
I/O memory
CMND(490):
(Not possible for CS-series CPU Units that are pre-EV1) File memory operations
CPU Unit
Memory Card
EM file memory
CMND
instruction
I/O memory
Memory Card
EM file memory
Operation
Operation
Name Mnemonic Description
READ DATA
FILE FREAD(700) Reads specified data file data or data elements
to specified I/O memory.
WRITE DATA
FILE FWRIT(701) Uses specified I/O memory area data to create
a specified data file.