Section 5 EtherNet/IP Communications Protocol
Setting Connections
If I/O memory addresses are specified for the communications areas, the information in the communications areas
will be cleared when the operating mode of the PLC changes unless addresses in the CIO Area, which are
maintained, are specified.
The following assembly object is required to specify instances when the EDS file is not used.
If you connect to an OMRON master, the maximum data size for one tag data link connection depends on the model of
the master. Use the sizes in the following table for reference.
Setting item Description
Originator device (PLC) Input tag sets Tag set name on PLC [40 to 1,032 bytes]
Input connection types Cannot be changed (point to point connection).
Output tag sets Tag set name on PLC [40 to 1,032 bytes]
Output connection types Cannot be changed (point to point connection).
Target device (Reader/Writer) Output tag sets Input_11 [40 to 1,032 bytes]
Input tag sets Output_10 [40 to 1,032 bytes]
Requested packet interval (RPI) User specified (2.0 to 10,000 ms, default: 10.0 ms)
Parameter name Set value Remarks
Instance ID 100 Output connection (40-byte tag set and tags)
101 Output connection (264-byte tag set and tags)
102 Output connection (520-byte tag set and tags)
103 Output connection (1,032-byte tag set and tags)
110 Input connection (40-byte tag set and tags)
111 Input connection (264-byte tag set and tags)
112 Input connection (520-byte tag set and tags)
113 Input connection (1,032-byte tag set and tags)
EtherNet/IP master
Maximum data size per
connection
Recommended data size
setting for tag or tag set.
NX701 CPU Unit 1,444 bytes 1,032 bytes
NJ-series CPU Unit 600 bytes 520 bytes
Built-in EtherNet/IP function on CJ2H-series CPU Unit 1,444 bytes 1,032 bytes
Built-in EtherNet/IP function on CJ2M-series CPU Unit 1,280 bytes 1,032 bytes
EtherNet/IP Unit 1,444 bytes 1,032 bytes
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