Rockwell-automation FactoryTalk View Machine Edition Users Guide Manuale Utente Scaricare il pdf (Pagina 441)

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21 • Set up graphic objects

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Set up control list selectors

Control list selectors allow an operator to scroll through a list of states for a process and

select one of the states. A highlight in the list shows the current state.

A control list selector can show several states at the same time, but only one state can be

selected at a time. As the operator scrolls through the list, each successive state is selected

automatically. If you want the operator to confirm the selection of a particular state before

the state’s value is written to the programmable controller, create an enter button on the

same display as the control list selector, and select the “Write on enter” option.

The operator can scroll through the control list selector using:

 Key button graphic objects. These are graphic objects that duplicate the functions of

keyboard keys.

 The arrow keys and Enter key on a terminal’s keypad.

 The arrow keys and Enter key on a keyboard.

Use buttons with the control list selector

The operator presses the buttons to scroll up or down the list, or to make selections from

the list. The buttons can be set up to work with the control list selector that has input

focus, or you can link the buttons to a specific control list selector.

How Enter key handshaking works

When the operator selects a state in the control list selector and presses an enter button or

Enter key, the highlighted state’s value is written to the programmable controller or

device.

Use this button To do this

Backspace Move the cursor back to the highlighted item in the list.

End Move to the bottom item in the list.

Enter Select the item the cursor is pointing to.

Home Move to the top item in the list.

Move down Move down one item in the list.

Move up Move up one item in the list.

Page down Move down one page in the list.

Page up Move up one page in the list.

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Rockwell-automation FactoryTalk View Machine Edition Users Guide Manuale Utente Pagina 441

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