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WAGO-I/O-SYSTEM 750
Fieldbus Communication 265
750-882 Media Redundancy ETHERNET Controller
Manual
1.5.0
12.3.2 Protocol overview in the OSI model
In order to clarify the interrelationships between DeviceNet, ControlNet and
EtherNet/IP, the following diagram presents the associated ISO/OSI reference
model.
7
Application
Layer
Object Library
(Communications, Applications, Time Synchronization) Safety Object Library
C
om
on
In
du
str
ial P
ro
to
co
l (
C
IP
)
6
Presentation
Layer
Data Management Services
Explicit and I/O Messages
Safety Services and
Messages
5
Session
Layer
Connection Management, Routing
4
Transport
Layer
TCP/UDP
CompoNet
Network and Transport
ControlNet
Network and
Transport
DeviceNet
Network and
Transport
N
etw
ork
A
da
pta
tio
ns
o
f C
IP
3
Network
Layer
Internet
Protocol
2
Data Link
Layer
Ethernet
CSMA/CD
CompoNet
Time Slot
ControlNet
CTDMA
CAN
CSMA/NBA
1
Physical
Layer
Ethernet
CompoNet
ControlNet
DeviceNet
Table 187: ISO/OSI reference model