204 • Fieldbus Communication
ETHERNET
WAGO-I/O-SYSTEM 750
Linux Fieldbus Coupler
10.1.3.2 Communication Protocols
In addition to the ETHERNET standard, the following important
communication protocols are implemented in the WAGO ETHERNET based
(programmable) fieldbus couplers and controllers:
• IP Version 4 (Raw-IP and IP-Multicast )
• TCP
• UDP
• ARP
The following diagram is intended to explain the data structure of these
protocols and how the data packets of the communication protocols Ethernet,
TCP and IP with the adapted application protocol MODBUS nested in each
other for transmission. A detailed description of the tasks and addressing
schemes of these protocols is contained in the following.
Fig. 10-8: Communication Protocols G012907e
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