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FS-8707-06 FST OPC Server for FieldServers
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.
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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It is incumbent on the user to configure the ports and the Map
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