IAI America XSEL Ethernet - Manual (Page 15)

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1. Overview
This option allows the X-SEL controller to perform control in an open network environment using the
Ethernet infrastructure, the de-facto standard and most common form of communication media for linking
PCs and host computers.
(1) Remote I/O control (Modbus/TCP  EtherNet/IP)
The X-SEL controller supports remote I/O control (a maximum of 256 input points and 256 output
points) via Modbus/TCP.
Modbus/TCP is an Ethernet application of the Modbus protocol used in serial communication.
* EtherNet/IP is supported only by X-SEL controllers of P/Q types (main application version 1.05 or
later). Also note that to use EtherNet/IP, you need an interface board compatible with EtherNet/IP.
(2) Message
communication
The communication capabilities supported by the RS232C communication function of the X-SEL
controller can be implemented via Ethernet.
 IAI protocol B/TCP
IAI protocol B for serial communication is supported.
The X-SEL controller can be connected to PC software.
 Transmission by SEL program (4 channels)
Four channels of ASCII-based, delimiter-controlled communication are supported, using a set of
transmission commands in a system roughly equivalent to that used in the X-SEL controller’s serial
communication.
 Substitute programs
 Send work data
(IAI protocol)
 Send/receive I/O signals
(Modbus/TCP
 EtherNet)