Fig. 13 Protocols Running On Top Of Tcp/Ip And Udp/Ip - Beckhoff CX8190 Manual

Transmission Control Protocol (TCP)
The Transmission Control Protocol (TCP) which runs on top of IP is a connection-oriented transport protocol.
It includes error detection and handling mechanisms. Lost telegrams are repeated.
User Datagram Protocol (UDP)
UDP is connectionless transport protocol. It provides no control mechanism when exchanging data between
sender and receiver. This results in a higher processing speed than, for example, TCP. Checking whether or
not the telegram has arrived must be carried out by the higher-level protocol.
Protocols running on top of TCP/IP and UDP/IP
The following protocols can run on top of TCP/IP or UDP:
• ADS
• ModbusTCP
Both of these protocols are implemented in parallel on the Bus Coupler, so that no configuration is needed to
activate the protocols.
Fig. 13: Protocols running on top of TCP/IP and UDP/IP.
ADS can be used on top of either TCP or UDP, but ModbusTCP is always based on TCP/IP.
CX8190 Version: 1.5
Ethernet X001 Interface
55