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All iFIX network traffic is session-oriented. Transactions between two nodes occur over a session. Before a View client can initiate a request, a session must be established with the SCADA server. Only one socket is created when using iFIX on a TCP/IP network. However, two logical sessions are maintained. The session initiated by the iClient is used to retrieve data from the SCADA servers. Another session is established from a SCADA server to an iClient to send alarms to the client. In this case, the request portion of the transaction consists of the alarm data and is acknowledged by a response. These two logical sessions are maintained over one physical connection. To establish a connection, the address of the remote node must be obtained. The method of finding this address, address resolution, is especially important for Wide Area Network (WAN) environments.
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Important Notice You do not have the latest version of iFIX! You are missing out on the newest capabilities and enhanced security. For information on all the latest features, see the iFIX product page. For more information on upgrades, contact your GE Digital sales agent or e-mail [email protected]. For the most up-to-date documentation, go here. |
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