WOLFRAM SYSTEM MODELER
WriteA block for writing data to an item on an OPC server at intervals determined by parameter samplePeriod |
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Wolfram Language
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SystemModel["OPCClassic.Blocks.SamplerReal.Write"]
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Information
This block writes data of type Real from the OPC server it is connected to. It inherits the properties of the partial model Sampler, which contains parameters such as samplePeriod and itemName that determine how often and to which OPC item the data should be written.
At every sampling instant, external function writeExternalReal is called from within the block.
Relevant Parameters
- samplePeriod: determines how often to sample data from the OPC item
- startTime: when the block should start to read data
- itemName: which OPC item to read data from
- 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 server
- serverID: the connector that connects the block to the OPC server component
Parameters (7)
| samplePeriod |
Value: Type: Time (s) Description: Sample period of component |
|---|---|
| startTime |
Value: 0 Type: Time (s) Description: First sample time instant |
| itemName |
Value: Type: String Description: The OPC item that data should be written to or read from |
| 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 Type: Real Description: Lower limit of written signal |
Outputs (2)
| sampleTrigger |
Type: Boolean Description: True, if sample time instant |
|---|---|
| firstTrigger |
Type: Boolean Description: Rising edge signals first sample instant |
Connectors (2)
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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 (3)
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OPCClassic.Examples Basic example that demonstrates how to write to and read from items on an OPC server |
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OPCClassic.Examples Example that demonstrates a possible use of multiple servers |
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OPCClassic.Examples A tank system model where height data is written to and read from an OPC item |
Used in Components (1)
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OPCClassic.Blocks.SamplerReal A block for writing data to multiple items on an OPC server at intervals determined by parameter samplePeriod |