PLACING AUDIO AND VIDeO eLemeNTS ON THe PALeTTe
Two types of AV elements can be added to your palette: An AVI player for animations and
movies, and a WAV player for sound files.
Figure 26: AudVid Tab
Playing an Audio or Video message
You can have the real-time screen play an audio message when an I/O point meets certain con-
ditions. The audio message must be a Windows Wave (WAV) file, which can be created with
a sound card, microphone and the Windows
Sound Recorder
program located under
Programs>
Accessories>Multimedia.
The Wave file can be set to play when an I/O value is Equal (EQ), Not
Equal (NE), Less Than (LT), Less Than or Equal (LE), Greater Than (GT), or Greater Than
or Equal (GE). To use this feature, follow the steps below. Note that the components placed
on the palette for this feature will be invisible in Run mode.
1. Click the AudVid tab and place the Wavplayer component on the palette.
2. On the properties menu, double-click in the
Filename
field and select the Wave
file you want played. You can click the
Play
box to hear the message play once.
3. Click the DataPoint tab and place the
DataPointAlert
component on the palette.
4. From the properties menu, set the
AlertInterval.
This is how often the Wave file
will be played when the logical condition is true.
5. Double-click in the
Datapoint
field and select the I/O point you wish to use to
activate the Wave file.
6. Click in the
DynComponent
field and click the down arrow. Choose the
Waveplayer1 component.
7. Click in the
DynProperty
field and click the down arrow. Choose the
Play
prop-
erty.
8. Click in the
ThresholdType
field and select the logical threshold you want to use to
determine when to play the file.
9. Set the
ThresholdValue
that will be used to compare against the datapoint value.
Figure 27: WAV palette & properties
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