10-1
Overview of Modbus TCP Master
Function
The Modbus TCP is a protocol for using the message of the Modbus protocol on Ethernet. The Mod-
bus TCP Master function sends Modbus commands to the Modbus TCP slave and receives responses
from the Modbus TCP slave.
Built-in EtherNet/IP port
Ethernet
Modbus TCP Master
Omron RFID, etc.
Sending Modbus command
Sending Modbus command response
Modbus TCP slave
CPU Unit
10 Modbus TCP Master Function
10-2
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)