Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 291)

17 • Use your application
17-33
•
•
•
• •
Problems with the string pop-up windows
Problems with the string pop-up keyboard and scratchpad occur under these
circumstances:
 If the graphic display changes remotely before the user has pressed the Enter button,
the pop-up window closes without writing out a string.
 If the screen resolution is smaller than 236 pixels wide by 208 pixels high, the pop-up
keyboard cannot open.
 If the screen resolution is smaller than 236 pixels wide by 44 pixels high, the pop-up
scratchpad cannot open.
 If the string pop-up window is set up to accept more characters than the Value
connection tag length, the pop-up window remains open and the string is not written to
the connection. The scratchpad area changes to red to alert the operator of the error.
 If Enter key handshaking is still in effect, the pop-up window closes but the value is
not written to the connection.
Change tag values
This section gives an overview of the graphic objects you can use to change tag values.
For information about setting up the objects, see Chapter 21 and Help.
The operator uses these objects to start and stop plant operations, and to control machines
and processes. Choose the objects that best suit your process. Set up the data source to
carry out the desired actions in response to the changes in tag values.
The operator can use function keys with all of these objects except control list selectors,
third-party ActiveX objects, and drawing objects with slider animation. The last three
types of objects can be pressed using a mouse or touch screen.
For information about assigning function keys to graphic objects, see page 21-5.
You can also use macros to assign values to tags. For more information, see Chapter 30.
The operator can change tag values at run time using these graphic objects:
Do not use push buttons for emergency stops. Emergency stop buttons must be hard-wired.
Use this graphic object To do this
Momentary push button Start a process or action by sending one value to the tag when
pressed, and another value when released.