Born in early 2000, Ethernet/IP (Ethernet Industrial Protocol) has for many years contended with Profinet for the most widely used fieldbus with a market share of 15 to 20 percent.

EtherNet/IP is an open fieldbus standard based on CIP (Common Industrial Protocol), developed by Rockwell Automation and and certified by ODVA (Open DeviceNet Vendor Association). Common Industrial Protocol (CIP) networks follow the Open Systems Interconnection (OSI) model, which defines the framework conditions for implementing network protocols in seven layers, each with strictly defined tasks.

EtherNet/IP is an industrial Ethernet communication protocol designed primarily for multi-sector automation applications.

EtherNet/IP supports Ethernet, the Internet and is compatible with TCP or UDP (User Datagram Protocol). This compatibility thus enables seamless integration of EtherNet/IP into industrial networks and allows continuity control between IT and OT.

EtherNet/IP can be made real-time compatible in combination with UDP to transfer data faster.

TopologyStar, Tree,Ring, Daisy Chain
Network segmentationVia switch
Baud Rate100 Mbps with CAT5 4 cabling and RJ45 connections
Bandwidth10 / 100 Mbps
ChipEthernet Standards
Data TransmissionReal-time, cyclic, event-driven
Real-time synchronizationIEEE 1588
Organization SupportODVA
Compatible standardsCIP, ControlNet, DeviceNet, HTTP, FTP, SNMP, DHCP, TCP-IP, UDP
Cycle time10..1 ms
Max. no. of nodesDepends on IP subnetwork
ApplicationsProcess control, motor control, production automation
Device classesScanner, Adapter
Ethernet/IP technical data

SENECA range

Depending on the available Ethernet form factor and ports, SENECA offers 3 Ethernet/IP gateways: Z-KEY-E, R-KEY-LT-E, Z-KEY-2ETH-E. These are gateways for Modbus RTU/ASCII/TCP and EtherNet/IP network communications. To integrate existing Modbus devices into an EtherNet/IP network, the gateway acts as a Modbus master to collect data and exchange it with EtherNet/IP devices. The gateway converts the stored Modbus data into EtherNet/IP packets so that the EtherNet/IP scanner can control or monitor Modbus devices.

Code (model)Ethernet portsRS232/RS485 portsRS485 portsIsolated serial ports

SENECA’s Ethernet/IP gateways, configurable via web server, operate in the adapter / ModBUS Master mode in which an Ethernet/IP scanner PLC can be connected with ModBUS RTU/ASCII Slave type I/O devices

The gateway, on the serial side, operate as ModBUS Master devices and on the Ethernet side as an Ethernet/IP Adapter.

Modbus requests (read or write commands) are configured in the device and an EDS file is automatically generated. Once this file is imported into the PLC development software (e.g., Rockwell STUDIO 5000) all configured I/O will be accessible without any other additional configuration. In addition to serial devices, it is also possible to connect up to 3 Modbus TCP-IP servers.

Application schemes with Ethernet/IP gateway