FieldServer FS-8707-06, Руководство пользователя

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FS-8707-06 FST OPC Server for FieldServer Page 8 of 15
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6 CONFIGURING THE OPC CLIENT TO USE THE FST 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 the Client browse the OPC Servers on the network and select the one named “FieldServer.7.16.x”.
Note that the “x” is a wild card which references the revision number. If it is not visible, check that the
hidden application “OPCENUM.EXE” is running on the Server machine. Refer to Appendix A.1

Browse the Server. (If the Client does not have a browse facility, enter addresses manually - refer to
Appendix A.1 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
1
in Integer types
<FieldServerName>:<Data Array name>:<offset>:<bit>
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)1. Many OPC Clients do not specify the datatype forcing the default. Float is the only
compliant datatype per OPC Standards, and it is therefore recommended that this datatype is used.
1
For packed bits the OPC datatype MUST be VT_BOOL