Create an interlocked button

An interlocked push button is one of a group of buttons that have the same control tag. The buttons function together in much the same way as the station selector buttons on a car radio: pressing one cancels the other and makes a new selection. Although interlocked push button function as a group, you add them to the screen one at a time.
When the operator presses the interlocked push button, the application sends the button’s value to the data source and highlights the selected button.
IMPORTANT:
Do not use push buttons for emergency stops. Emergency stop buttons must be hard-wired.
To create an interlocked push button:
  1. In the
    Graphics
     editor, click
    Objects
     >
    Push Button
     >
    Interlocked
    , or click the interlocked push button icon in the toolbox.
  2. Drag the mouse to position and draw a rectangle the general size and location you intend the button to be.
  3. In the
    Interlocked Push Button Properties
     dialog box, specify how the button looks, the button’s value, and its tags.
    TIP:
    The interlocked push button remains highlighted as long as the value at the data source is the same as the button value. Therefore, only one button in the group is active and highlighted at any given time, unless you assign the same value to two or more interlocked push buttons.
    You can use a single interlocked push button to set a value.
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