Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 404)

F ACTORY T ALK V IEW M ACHINE E DITION U SER ’ S G UIDE
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 Auto repeat delay—the length of time the button has to be pressed and held down
before auto repeat starts.
To set up auto repeat for a button, use one of these methods
 In the Timing tab of the button’s Properties dialog box, specify the Auto repeat rate
and Auto repeat delay properties.
 In the Properties tab of the Property Panel, specify the AutoRepeatRate and
AutoRepeatDelay properties.
Ensure values are read by the data source before sending new
values
To ensure a value is read by the data source before the operator sends a new value, use
Enter key handshaking. While Enter key handshaking is in effect for an object, the
operator cannot send a new value to the object’s Value connection.
You can use Enter key handshaking with these graphic objects:
 Control list selector
 Piloted control list selector
 Numeric input enable button
 String Input Enable button
 Numeric input cursor point
If Enter key handshaking is in effect for one of these objects, the operator can still provide
input to other objects in the graphic display.
If the graphic display is closed while Enter key handshaking is in effect, the handshaking
is cancelled.
Methods of Enter key handshaking
Enter key handshaking works by setting the object’s Enter connection to 1. As long as the
Enter connection is set to 1, new values cannot be sent to the Value connection. How the
Enter connection is reset to 0 depends on how you set up Enter key handshaking.
There are two ways you can use Enter key handshaking:
 To hold the value at the data source for a specific period of time.
 To hold the value at the data source until the data source notifies FactoryTalk View
that the value has been read.
Choose the method that best suits your application needs and communication system.