Create a latched button

Use the latched push button object to create a button with a latched and unlatched state. This type of button is useful for starting a machine or process.
For example, use the latched push button when you want the Value control to start a process within a programmable logic controller (PLC) and remain set until the process is completed. You can also use a latched push button when you have a PLC with a long program or long scan times.
IMPORTANT:
Do not use push buttons for emergency stops. Emergency stop buttons must be hard-wired.
To create a latched push button:
  1. In
    FactoryTalk View Studio
    , in the
    Graphics
     editor, select
    Objects
     >
    Push Button
     >
    Latched
    , or click the latched 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
    Latched Push Button Properties
     dialog box, specify how the button looks, how to unlatch the button, and its tags.
    TIP:
    Use the Handshake connection to signal that the program has read the Value connection.
    The latched push button sends a value to the data source when pressed, and retains this value until reset by the Handshake connection.
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