ABB3HAC026185-001

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ABB 3HAC026185-001

 Self-defined TCP Communication  

The TCP Communication library (TCPCommLib) contains function block types for
AC 800M controller communication with external devices through Ethernet, using TCP.

It is similar to the Self-defined Serial Communication, but on Ethernet.
The typical application areas are the following:
• Communication with different road-infrastructure network nodes such as
variable speed signs, traffic direction and information signs.
• Vision Cameras: Many implement the Telnet protocol (ASCII TCP
communication over standard port number 23).
• TCP is used in Information server. The controller may act as both client and
server on the network. Example of server use is a SCADA application where a
supervisory system connects to different servers and collects information
periodically.

The TCPCommLib library supplies IEC 61131-3 function blocks that make it
possible to read and write a struct of dints or dwords from/to controller's 

on-board Ethernet channels, CN1 and CN2. Network redundancy is handled by RNRP.

The following function block types are available:
• TCPServerConnect: The TCPServerConnect function block is used to let the
controller become a TCP server waiting for connection requests initiated by
other TCP clients on the network.
• TCPClientConnect: The TCPClientConnect function block is used to open
and close a TCP connection to a remote TCP server on the network.
• TCPWrite: Writes a struct of dints or dwords.

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