Rockwell-automation FactoryTalk View Machine Edition Users Guide Manual do Utilizador descarregar pdf (Página 404)

FACTORYTALK VIEW MACHINE EDITION USER’S GUIDE

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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.

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