Create a Latched push 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 connection 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 update times.
To create a Latched push button
  1. In the
    Graphics Display
     editor, select
    Objects > Push Button > Latched
     or drag Latched push button from the toolbox.
  2. Drag the mouse to position and draw a rectangle the general size and location you want the button to be.
  3. Double-click the button to open its
    Properties
     dialog box.
  4. IMPORTANT:
    Do not use push buttons for emergency stops. Emergency stop buttons must be hard-wired.
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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