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}
To write to multiple channels, the C# code example below can be used:
using (Task AnalogWrite = DaqSystem.Local.LoadTask(*task name*))
{
AnalogMultiChannelWriter writer = new AnalogMultiChannelWriter(AnalogWrite.Stream);
writer.WriteSingleSample(true, *output array*);
}
When reading the sensors, the DAQ input needs to be converted before the values can be
used. The 2 - 6 [V] input must be converted into 0 - 20 [cm] (tank height). This is done by the
simple calculation below:
Converted sensor value = (5 * sensor value) – 10
When converting from 0 - 20 [cm] to 0 – 5 [V], only dividing by 4 is required (multiply by 4
when going from volt to cm).
5.1.5 Starting the control application
When the control application is initialized (without errors), the application can be started by
clicking the enabled ‘start’ button on the left side of the UI (User Interface), shown in Figure
5-3.
When the start button is clicked the control application will initialize the control algorithm
class (ControlAlgorithm) with the configuration values needed and start two timers named t1
(ControlTimer1) and t2 (ControlTimer2). A message confirming that the application is
running will be shown in the status field, the stop button will be enabled and the start button
will be disabled, this is shown in Figure 5-5.
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