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1.FST OPC Server for FieldServers Description
This OPC Server (I/O Driver) communicates with the FieldServer. The method of data transfer is called Data Array Access (DAA). The Data Arrays are arrays of typed data memory in the FieldServer. The source of the information in the Data Arrays can be any one of the standard FieldServer I/O Drivers. It is incumbent on the user to configure the ports and the Map Descriptors on the FieldServer. The Map Descriptors are FieldServer objects containing polling instructions for an I/O Driver to copy data from the Low level Devices into a Data Array. One of the many advantages of this architecture is that it allows many disparate proprietary devices PLC/DCS’s etc. to share common data in a reliable embedded device (FieldServer) while providing access to the SCADA/PC application level via this OPC Server. Please refer to the FieldServer Configuration Manual for instructions on configuration on the FieldServer side, the tools required are not part of this package.
Note for Users with a Client that uses the Syncio Interface: Please note that the Device mode is preferred over Cache mode when using this driver. The driver does support Cache mode, and this can be used if necessary.
1.1.OPC Version Supported
The FST OPC Server supports OPC Version 2
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