Technical data

172 • Ethernet/IP (Ethernet/Industrial Protocol)
General
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
7 Ethernet/IP (Ethernet/Industrial Protocol)
7.1 General
Ethernet/IP is a communication system that enables devices to exchange time-
critical application data in an industrial environment. The spectrum of devices
ranges from simple I/O devices (e.g., sensors) through to complex controllers
(e.g., robots).
Ethernet/IP uses CIP (Control and Information Protocol), which is
implemented on the fourth layer in the ISO/OSI reference model (transport
layer), and is also used by DeviceNet and ControlNet. Therefore, converting
from one of these protocols to Ethernet/IP is easy to do.
Ethernet/IP uses the standard Ethernet and TCP/IP technology (IEEE 802.3) to
transmit the CIP communication packets.
In order to clarify the interrelationships between DeviceNet, ControlNet and
Ethernet/IP, the following diagram presents the associated ISO/OSI reference
model.
Application device profiles
(e.g. positioning controllers, semi-conductors, pneumatic valves)
7 Application
layer
CIP application object library
6 Presentation
layer
CIP data management services
(explicit messages, I/O messages)
5 Session
layer
CIP message routing, connection management
CIP
4 Transport
layer
Encapsulation
protocol
TCP UDP
3 Network
layer
DeviceNet or ControlNet
transport
(transmission control,
addressing)
IP
2 Data Link
layer
CAN (CSMA/NBA) or
ControlNet (CTDMA)
Ethernet
(CSMA/CD)
1 Physical
layer
DeviceNet or ControlNet
physical interface
Ethernet
physical interface
ETHERNET/IP