Enable JavaScript to interact with content and submit forms on Wolfram websites. Learn how

WOLFRAM SYSTEM MODELER

MultipleServers

Demonstrates a possible use of multiple OPC UA servers

Diagram

Wolfram Language

In[1]:=

SystemModel["OPCUA.Examples.MultipleServers"]

Out[1]:=

Information

This example demonstrates that using the OPCUA Library, it is possible to connect to multiple servers from one model.

This example requires two OPC UA example servers running on localhost. Read about how to start the example servers here.

The read component reads data from a real-valued node "51031" on "opc.tcp://localhost:16664". The data is then passed through a Butterworth lowpass filter with a cutoff frequency of 0.2 Hz. Finally, the component write writes the filtered data to node "51031" on "opc.tcp://localhost:16665".

There are several possible applications of being able to connect to more than one server from one model, such as processing data read from one server and writing the modified data to another server.

If you have the possibility to set up a remote OPC UA server, what you need to do get this example to use the remote is to:

Change endpointUrl accordingly in component client1 or client2
Change the corresponding nodeID, nodeIDType and nodeNamespace in the connected read/write component so that it connects to a real-valued node on the remote server

Parameters (1)

errorHandling	Value: Types.ErrorHandling.ErrorWhenUncertain Type: ErrorHandling Description: How to handle node errors (request errors are handled by the connected Read/WriteNodeList component)

errorHandling

Value: Types.ErrorHandling.ErrorWhenUncertain

Type: ErrorHandling

Description: How to handle node errors (request errors are handled by the connected Read/WriteNodeList component)

Components (9)

	client1	Type: Client Description: Client for connecting to an OPC UA server
	filter	Type: Filter Description: Continuous low pass, high pass, band pass or band stop IIR-filter of type CriticalDamping, Bessel, Butterworth or ChebyshevI
	client2	Type: Client Description: Client for connecting to an OPC UA server
	combiTimeTable	Type: CombiTimeTable Description: Table look-up with respect to time and linear/periodic extrapolation methods (data from matrix/file)
	write	Type: Write Description: Adds writing of a Real scalar node to a WriteNodeList
	read	Type: Read Description: Adds reading of a Real scalar node to a ReadNodeList
	writeClock	Type: PeriodicExactClock Description: Generate a periodic clock signal with a period defined by an Integer number with resolution
	shift	Type: ShiftSample Description: Shift the input clock by a fraction of the last interval and provide it as output clock
	writeTableData	Type: Write Description: Adds writing of a Real scalar node to a WriteNodeList