WOLFRAM SYSTEM MODELER
TriggeredReadA block for reading data from items on an OPC server at intervals determined by an external Boolean signal (trigger) |
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Wolfram Language
In[1]:=
SystemModel["OPCClassic.Blocks.SamplerReal.TriggeredRead"]
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Information
This block reads data of type Real from the OPC server it is connected to. Unlike the read blocks that have a parameter for setting the sample period, the triggered read blocks read data when Boolean input signal trigger has a rising edge. The block inherits the properties of the partial model TriggeredSampler.
At every sampling instant, external function readExternalReal is called from within the block.
Relevant Parameters
- itemName: which OPC item to read data from
Interfaces
- y: a Real output, which is the sampled signal
- serverID: the connector that connects the block to the OPC server component
- trigger: a Boolean input that determines when the block should sample data
Parameters (2)
| itemName |
Value: Type: String Description: The OPC item that data should be written to or read from |
|---|---|
| y_start |
Value: 0 Type: Real Description: initial value of output 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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y |
Type: RealOutput Description: The data read from the item on the OPC server |
Used in Examples (1)
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OPCClassic.Examples Model that samples data from an OPC item irregularly |
Used in Components (1)
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OPCClassic.Blocks.SamplerReal A block for reading data from multiple items on an OPC server at intervals determined by an external Boolean signal (trigger) |