Real-Time Trend (DSC Module)
LabVIEW Datalogging and Supervisory Control Module 8.2 Help
August 2006
NI Part Number:
370246E-01
»View Product Info
August 2006
NI Part Number:
370246E-01
»View Product Info
Reads live data from shared variables and displays the data in a waveform chart.
| Dialog Box Options |
| Block Diagram Inputs |
| Block Diagram Outputs |
Dialog Box Options
| Parameter | Description |
|---|---|
| Shared Variable List | Contains the following options:
|
| Add | Adds the selected item(s) from Shared Variable List to the Added Shared Variable List. |
| Remove | Removes the selected item(s) from the Added Shared Variable List. |
| Added Shared Variable List | Lists the shared variables to display in the waveform chart. |
| Time between updates (seconds) | Specifies the time to wait before attempting to read data from the network. |
| Engineering units | Charts the data based on unit value. |
| Percent of full scale | Charts the data as a percentage of the data range. |
Block Diagram Inputs
| Parameter | Description |
|---|---|
| scale to % | Specifies the mode to chart the data. Set this input to TRUE to use engineering units. Set this input to FALSE to use a percentage of the full scale. |
| Shared Variable List | Lists the shared variables to display in the waveform chart. |
| time interval (secs)(1) | Specifies the time to wait before attempting to read data from the network. |
| Trend Reference | Specifies the control reference to a waveform chart. |
Block Diagram Outputs
| Parameter | Description |
|---|---|
| trend data | Specifies the real-time data points to display. Wire this output to a waveform chart. |
| error | Returns any error or warning condition from the Express VI. |
| shutdown | Specifies whether the shared variables are live. If this parameter is FALSE, the data that appears on the waveform chart is live shared variable data. If this parameter is TRUE, the shared variable has no value and the waveform chart displays a flat line. |