Rockwell-automation 2711 PANELBUILDER SOFTWARE USER MANUAL Manual de usuario descargar pdf (Pagina 303)

The Objects

Chapter 10

10-38

Configure the Enter key with a handshake so the PLC controller can

acknowledge that a value has been received from the terminal. Define two

PLC addresses: the Enter Key Control address and the Enter Key

Handshake address. When the operator presses the Enter key to send the

value to the PLC controller, the terminal sets the Enter Key Control

address to 1 (after a 400 msec. delay). You must have a line in your PLC

program to turn on the bit at the Enter Key Handshake address, to inform

the terminal that the Enter Key bit has been received. When the terminal

sees this bit on, it turns off the Enter Key Control bit.

If the terminal does not receive acknowledgement (transition from 0 to 1)

within 4 seconds, (or the Enter Key Handshake is unassigned), it displays

an error message in the Fault Window and resets the Enter bit. If the Enter

Key Handshake is unassigned, the Enter bit will remain set for the duration

of the button hold time or for as long as the button is pressed, whichever is

longer.

IMPORTANT: All touch screen input is disabled while the terminal is

waiting for handshake acknowledgement.

Decimal Formatting

To allow an operator to enter numbers with decimal points, choose Format

from the Object menu. The menu item Decimal Point will be highlighted.

Press Enter to open the list of choices for Decimal Point entry and choose

one of the following:

Fixed Position specifies a set number of digits to be displayed after the

decimal point in the window. For example, if the setting was for three

digits after the decimal, an operator’s entry would appear as follows:

Table 10.O

Fixed

Position Decimal Point

Digits Entered Keypad Control Address Value Number Displayed

1 100 .1

12 120 .12

123 123 .123

1234 1234 1.234

12345 12345 12.345

PLC Controlled allows the PLC controller to set the number of digits

to be displayed after the decimal point.

1 2 ... 298 299 300 301 302 303 304 305 306 307 308 ... 467 468

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Rockwell-automation 2711 PANELBUILDER SOFTWARE USER MANUAL Manual de usuario Pagina 303