5. CONFIGURATION
Figure 89: Selecting the OPC DA Server in the Client Configuration
In cases where the server is remotely located, it may be necessary to add the network path or IP address of the computer
in which the server is installed. In these cases, there are two configuration options. The first is to directly configure it, being
necessary to enable the COM/DCOM Windows Service. However, a simpler way is to use a tunneller tool that abstracts the
COM/DCOM settings, and enable a more secure communication between the Client and the Server. For more information on
this type of tool, refer to theNAP151 - Tunneller OPC.
Once the Client connects with the Server, it’s possible to use the TAGs import commands. These commands consult the
information declared in the PLC, returning a list with all the symbols available in it.
Figure 90: Symbols list consulted by the OPC Client
The list of selected variables will be included in the Client communication list and can be used, for example, in a SCADA
system screen.
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