|
|
The features on this page require an add-on to work with GENESIS64 Basic SCADA. |
|
|
The features on this page require an add-on to work with GENESIS64 Basic SCADA. |
The Modbus OPC Server is the actual runtime module. The Modbus OPC Server is responsible for accessing the data on the OPC clients' requests. The OPC server has no user interface. It will be started automatically when the OPC client connects to the server.
The runtime module operates directly with the database. Read and write operations are performed directly with no intermediate cache level. It has the effect that every client works with accurate data. In normal situations, the data in the database will be accessed (read/write) by OPC clients. However, the data are stored in a standard database, and other software applications can manipulate its data as well through programming techniques such as Microsoft's ADO (ActiveX Data Objects) or OLE DB. The Modbus OPC Server refreshes (with a configurable delay) its tags in order to inform the OPC clients of changes through some external application.
One of the basic concepts of the Modbus OPC server is that monitored data are relatively stable in time. The runtime module resides in the ICONICS/Modbus OPC Server 3.6 directory.
See Also:
Active Configuration Database File Setting