WOLFRAM SYSTEM MODELER
TriggeredWriteA block for writing data to an item on an OPC server at intervals determined by an external Boolean signal (trigger) |
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Wolfram Language
In[1]:=
SystemModel["OPCUA.Blocks.SamplerReal.TriggeredWrite"]
Out[1]:=
Information
This block writes data of type Real to the OPC UA server it is connected to. Unlike the write blocks that have a parameter for setting the sample period, the triggered write blocks write data when Boolean input signal trigger has a rising edge. The block inherits the properties of the partial model TriggeredSampler. Only scalar nodes can be written to; i.e. no array or matrix nodes are supported.
At every sampling instant, external function writeExternalReal is called from within the block.
Relevant Parameters
- nodeID: which OPC UA node to write data to (ID value should always be inside quotes)
- nodeNamespace: which namespace the node is located in
- nodeIDType: which ID type to use, numeric or string
- uaRealType: which OPC UA Real type to use when writing data
- uMax: if useUMax is true, then uMax is the upper limit for the written data
- uMin: if useUMin is true, then uMin is the lower limit for the written data
- useUMax: if true, respect upper limit uMax
- useUMin: if true, respect lower limit uMin
Interfaces
- u: a Real input, which is the signal to be sampled and written to the OPC UA server
- serverID: the connector that connects the block to the OPC UA server component
- trigger: a Boolean input that determines when the block should sample data from the input signal
Parameters (8)
| nodeIDType |
Value: Type: UANodeIdType Description: The node identifier type |
|---|---|
| nodeID |
Value: Type: String Description: The node identifier |
| nodeNamespace |
Value: Type: Integer Description: The node namespace |
| uaRealType |
Value: Type: UAReal Description: OPC UA type used for writing |
| useUMax |
Value: false Type: Boolean Description: If true, use upper limit for written signal |
| uMax |
Value: 1.0 Type: Real Description: Upper limit of written signal |
| useUMin |
Value: false Type: Boolean Description: If true, use lower limit for written signal |
| uMin |
Value: 0.0 Type: Real Description: Lower limit of written signal |
Connectors (3)
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trigger |
Type: BooleanInput Description: Boolean input that determines when sampling should occur |
|---|---|---|
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serverID |
Type: BlockConnector Description: The unique ID of the server the block is connected to |
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u |
Type: RealInput Description: Input signal to be sampled |
Used in Examples (1)
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OPCUA.Examples Basic example that demonstrates how to write to and read from nodes on an OPC UA server using a signal trigger |