WOLFRAM SYSTEM MODELER
MultirateDemonstrates how to read node values using different sample rates |
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Diagram
Wolfram Language
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SystemModel["OPCUA.Examples.Multirate"]
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Information
This example shows how to read data with multiple rates from an OPC UA server.
This example requires an OPC UA example server running on localhost.
Read about how to start the example server here.
The convenience client OPCUA.Client can only read data with one sample rate and write data with one (possibly different) sample rate.
In some situations it is necessary to read (or write) with multiple sample rates.
For that, the OPCUA.Components.Core.Client must be used.
That client cannot be connected directly to read/write components; instead it is connected to one or more WriteNodeList/ReadNodeList.
Each list can use its own clock.
In this example, two ReadNodeLists are used to read, for ease of comparison, the same node but with two different sample rates.
Parameters (1)
| errorHandling |
Value: Types.ErrorHandling.ErrorWhenUncertain Type: ErrorHandling Description: How to handle request and data value errors |
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Components (13)
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readReal1x |
Type: Read Description: Adds reading of a Real scalar node to a ReadNodeList |
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writeReal |
Type: Write Description: Adds writing of a Real scalar node to a WriteNodeList |
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writeClock |
Type: PeriodicExactClock Description: Generate a periodic clock signal with a period defined by an Integer number with resolution |
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shift1x |
Type: ShiftSample Description: Shift the input clock by a fraction of the last interval and provide it as output clock |
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client |
Type: Client Description: Client for connecting to an OPC UA server |
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writeNodeList |
Type: WriteNodeList Description: Write the values of a list of nodes in a single OPC UA request |
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readNodeList1x |
Type: ReadNodeList Description: Read the values of a list of nodes in a single OPC UA request |
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readReal2x |
Type: Read Description: Adds reading of a Real scalar node to a ReadNodeList |
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readNodeList2x |
Type: ReadNodeList Description: Read the values of a list of nodes in a single OPC UA request |
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readBaseClock1x |
Type: PeriodicExactClock Description: Generate a periodic clock signal with a period defined by an Integer number with resolution |
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shift2x |
Type: ShiftSample Description: Shift the input clock by a fraction of the last interval and provide it as output clock |
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readBaseClock2x |
Type: PeriodicExactClock Description: Generate a periodic clock signal with a period defined by an Integer number with resolution |
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sine |
Type: Sine Description: Generate sine signal |