1.2              System Components & Concepts

Networking is built into the design of WebAccess.  The basic components of WebAccess are:

SCADA Node - which connects to Automation Hardware and makes data available to network.

Project Node - which is a centralized database server used by the configuration tool. Thin Clients use the Project node to view static snapshots of animated graphics. Historical Data from all SCADA nodes can be recorded to central database.

Clients - which display real-time data with animated graphics and allow operators to change values, acknowledge alarms and control in real-time. Clients connect directly to a SCADA node to get real-time data.

Thin Clients - which display snapshots of graphics and use a text based interface to change data, acknowledge alarms and control.

Figure 1.6 WebAccess Network Components