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6.Configuring Your OPC Client to use the FST OPC Server for FieldServers OPC Server.
The OPC Client refers to the Application Using the data available in the FieldServer. Normally this is a SCADA system or other third party software.
From your Client browse the OPC Servers installed on the machine. Select the one named “FieldServer.7.16k”. If you installed the Server on this machine then your Client should find this listed. If the FST OPC Server for FieldServers is on another machine then browse to that machine and select “FieldServer.7.16k”. If it is not visible, check that the hidden application “OPCENUM.EXE” is running on the Server machine. If this fails please refer to the troubleshooting section
You have now successfully connected to the Server; next browse the Server. (If your Client does not have a browse facility, you will need to enter addresses manually see below). The Browse hierarchy has two levels - FieldServers & Data Arrays. Each entry under Data Arrays is a hint, pointing to the first element of the Data Array, The user needs to delete the hint text and edit the offset number on the end to enter the desired address.
I/O addresses are in the following format (Analog & Bit Datatypes)
<FieldServerName>:<Data Array name>:<offset>
Address format for packed bits in Integer types
<FieldServerName>:<Data Array name>:<offset>:<bit>
* note for packed bits the OPC datatype MUST be VT_BOOL
6.1.OPC datatypes
This driver only has 2 canonical datatypes : VT_BOOL & VT_R4 (float). The default if no datatype is specified is VT_R4 (floating point). Many OPC Clients do not specify the datatype forcing the default.
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