Measurement-computing DASYLab User Manual Manual do Utilizador descarregar pdf (Página 51)

DASYLab

real-time. The synchronization is like an additional invisible data channel

which uses computing time even when DASYLab is not executing an action.

DASYLab executes asynchronous actions directly after the condition is met.

An asynchronous action influences the data block processed by the executing

module. This need not be the data block that triggered the action. Use

asynchronous actions when the action is independent of the data to be

processed, for example, connecting and disconnecting channels to display

modules.

DASYLab executes asynchronous actions fast. If DASYLab does not trigger

an action, asynchronous actions do not need extra computing time, except for

the monitoring of the input channels.

Control Sequencer

Use the control sequencer as a worksheet test executive. The sequencer

connects worksheets and controls the sequence of worksheets using actions.

For example, use a sequencer to run different tests with different worksheets

in one experiment. The first worksheet generates calibration settings and

transfers these settings to the next worksheet. Then the second worksheet

controls the measurement acquisition and saves the measurement values in a

file. Finally the last worksheet analyzes and displays the measurement

values.

To create a sequencer for this test, click Sequencer on the function bar.

DASYLab opens the sequencer program window. Right-click the

Unknown root entry and select New Worksheet from the context menu. For

example, load the

Calibration worksheet. Then load the worksheets

Measure and Analyze consecutively. Right-click the first worksheet

Calibration and select Set Start Worksheet.

Then create the actions that control the worksheet sequence. Right-click the

Calibration worksheet and select New Action from the context menu.

Select the condition that the value of the variable VAR_101 changes and then

select the action

Load and start of the Measurement worksheet. Then

create a second similar action which loads and starts the worksheet

Analysis due to a value change of the VAR_2 variable.

If you now start the measurement, DASYLab loads the

Calibration

worksheet. The calibration runs until an action in this worksheet assigns a

new value to the VAR_101 variable. Then DASYLab loads the Measure

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Measurement-computing DASYLab User Manual Manual do Utilizador Página 51