Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 414)

F ACTORY T ALK V IEW M ACHINE E DITION U SER ’ S G UIDE
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2. In the button’s Properties dialog box, fill in the options on each tab:
 In the General tab, specify what the button looks like at run time, and how the
button changes state.
 In the States tab, specify what the button does when it is pressed and released. For
tips about setting up states, see page 21-3.
 In the Common tab, specify the button’s spacial properties, name, and visibility.
 In the Connections tab, specify the tags or expression with which the button
exchanges data. For information about assigning tags and expressions, see
page 20-36.
For details about the options in the tabs, see Help.
3. When you are finished, click OK.
Set up Latched push buttons
The Latched push button latches in the On position, and must be unlatched by another
button or process to return to the Off position. 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 controller and remain set until the process is completed.
You can also use a Latched push button when you have a controller with a long program
or long update times.
When the operator presses a Latched push button, it changes the Value connection to one
value, and remains at that value until the Handshake connection gives the signal to unlatch
the button.
The error state
The button’s error state is shown at run time when:
 The Value connection is unassigned.
 The Indicator connection’s value does not match one of the state values you set up.
 The Handshake connection is unassigned.
The error state is also shown when the display containing the Latched push button first
opens, if the Value connection’s value does not match one of the state values you set up.