WirelessHART Fieldgate SWG70, Руководство по эксплуатации

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C Appendix: HART OPC Connection WirelessHART Fieldgate SWG70
102 Hauser
C Appendix: HART OPC Connection
C.1 HART OPC server
The HART OPC server is software which runs under Microsoft Windows and provides a standard
OPC communications interface with HART-capable instrumentation.
The HART OPC server acts as a transport mechanism for communicating with HART devices. The
interface via the server to the device is the same whether the device is connected directly to the PC
or connected via some intermediate I/O system. While the intermediate I/O systems may vary, the
interface to applications using the OPC server remains the same. It is possible to read out primary
variables, send commands and parameterize a device using the HART server.
A main advantage of the HART OPC server is that access to the field devices is shared. Many OPC
client applications (see Chapter 10.4) can access HART data from the same device or several
different devices simultaneously. The OPC client can subscribe to the data item of interest. In
addition, it is possible for the client, for example to only get the data item when it changes.
The HART OPC server is delivered with the product CD, see Chapter 7.4.1.
C.2 Creating an Ethernet network
1 Start the HART Server application.
Start => Programs => HART Server => HART Server
The last used project of the HART Server software will be opened automatically.
Alternatively, if an existing project opens, create a new project by selecting
File => New
2 Right-click on the HARTServer entry in the project window and select Add Network
3 The Add Network window opens
– Select the TCP/UDP from the drop-down menu
– Press Add to add the network to the project
NOTE!
• Other choices are "Single port" (RS-232 to single or multidropped HART devices) or
"Serial port RS-485" (RS-485 network to I/O system or multiplexer)
• The configuration of the "Single port" and "Serial port RS-485" options differs slightly from that
of the Ethernet port