Rockwell-automation 1768-EWEB EtherNet/IP Web Server Module User Manua Instrukcja Użytkownika Pobierz pdf (Strona 127)

Publication ENET-UM527E-EN-P - October 2006

Socket Interface 127

You can partition the 20 available socket instances between UDP and

TCP sockets. For example:

• Use all 20 instances for client TCP connections

• Use one instance to listen for incoming TCP connections and

then accept 19 connections from other device

• Perform both TCP client and server operations

• Perform both TCP and UDP operations

These socket services are available.

Once you open a connection on a client socket instance, you cannot

use the same socket instance to accept incoming connections.

Similarly, if you accept connections on a socket instance, you cannot

then use the instance to open outgoing connections. This behavior is

consistent with standard socket API behavior.

This Socket Service The Socket Instance Is See Page

CreateSocket Server or client 141

OpenConnection Client 143

AcceptConnection • if you issue an AcceptConnection service, the instance is listen type

• if the AcceptConnection service returns an instance as a result of an

incoming connection request, the socket instance is server type

146

Read Server or client 148

Write Server or client 151

DeleteSocket Server or client 153

DeleteAllSockets Server or client 154

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Rockwell-automation 1768-EWEB EtherNet/IP Web Server Module User Manua Instrukcja Użytkownika Strona 127