Omron CJ1W-EIP21 用户手册

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The IOM format is a data format used for binary data specified by the ladder
instructions, READ DATA FILE (FREAD(700)) and WRITE DATA FILE
(FWRIT(701)), in the CPU Unit.

If five words of data from the I/O memory (1234 hexadecimal, 5678 hexadeci-
mal, 9ABC hexadecimal, etc.) is contained in an attached file in IOM format,
the data will be stored in the attached file as shown in the following diagram.

Example: Binary data format with a delimiter after every 10 fields.

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The TXT format is a data format (using tab delimiters) specified by the ladder
instructions, READ DATA FILE (FREAD(700)) and WRITE DATA FILE
(FWRIT(701)), in the CPU Unit. The format is configured according to the
specified FREAD(700) and FWRIT(701) parameters, as follows:

If data from the I/O memory (1234 hexadecimal, 5678 hexadecimal, 9ABC 
hexadecimal, etc.) is contained in an attached file in TXT format, the data will 
be converted into ASCII format in words or double-words. The words are 
delimited by inserting tabs ([HT]: 09), and carriage returns (CR) after specified 
fields ([CR][LF]: 0D0A). 

Memory 
Cards

1. Insert the Memory Card into the CPU Unit.

2. Initialize the Memory Card from a Programming Device

(Programming Consoles included).

EM File Mem-
ory

1. Specify in the PLC Setup the first bank to convert to file memory.

2. Initialize EM File Memory from the CX-Programmer.

+0

+1

+2

+3

+4

+5

+6

+7

+8

+9

+0

1234

5678

9ABC

DEF0

1234

5678

9ABC

DEF0

1234

5678

+10

9ABC

DEF0

1234

5678

9ABC

DEF0

1234

5678

9ABC

DEF0

XX XX

XX 12 34 56 78 9A BC DE F0 12 34

I/O memory

.IOM file contents

48 bytes

(Reserved by the system.)

• Words without delimiters
• Double words without delimiters
• Words delimited by tabs.
• Double words delimited by tabs

• No CRs
• CR after every 10 fields.
• CR after each field.
• CR after every 2 fields.
• CR after every 4 fields.
• CR after every 5 fields.
• CR after every 16 fields.