Crestron Isys TPMC-12L Operation Manual page 58

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Isys 12" Wall Mount Touch Screen
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54 • Isys
12" Wall Mount Touch Screen: TPMC-12L
application can also be closed by pressing the "X" in the upper right hand corner of
Internet Explorer, we must keep the logic synchronized. If we do not, the toggle will
get out of sync. Similarly, using the reserved join to launch the embedded application
would result in the application being open, but the state of the toggle remaining low,
so a one-shot is used to set the state of the toggle if the embedded application is
opened in this way.
For example, the user presses button #10 and the output of the toggle
(<Open/Close_IE_FB>) is high. If the user presses the "X" on IE, IE closes. The
next time they touch button #10, <Open/Close_IE_FB> will go low, which tries to
close the application. However, the application is already closed. We need to reset
the state of the toggle to keep in sync with the actual state of the application.
The "Press" signal of the Open Close State Digital Join can be used to know the true
state of the application. When Press11 goes high, in this example, IE is open. When
Press11 goes low, IE is closed. Here, we use the falling edge of Press11 through a
One-Shot to reset the state of the Toggle symbol. Now the toggle is properly
synchronized if the user closes the application from the touch screen itself.
Crestron TPMC-12L
Operations Guide – DOC. 6686C