Denso Power Net Terminal BHT-7500 Especificações descarregar pdf (Página 129)

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7.2 Input from the Keyboard

7.2.1 Function Keys

Any of the following operations makes the pressed key act as a function key:

- Pressing one of the function keys.

- Pressing one of the function keys while holding down the Shift key.

- Pressing one of the numeric keys while holding down the Shift key.

Since each of the function keys is assigned its default value of a character code

or control code, pressing it enters the default value. New assignment is possible

with a KEY statement as described below.

If pressed with the Shift key held down, not only the function keys but also

numeric keys serve as function keys.

For the keyboard layouts, key numbers, and key assignments, refer to Appendix E, "Key Num-

ber Assignment on the Keyboard."

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Assigning a character string to a function key

You can assign a desired character string (up to two characters) or a single control code to a

function key by using the

KEY statement, as shown below.

- Example for characters

KEY 1,"AB"

- Example for a control code

KEY 2,CHR$(8) ‘-Backspace

Where a backspace code is assigned to the function key numbered 2.

NULL Character or String Assignment

Assigning a NULL character or string to a function key makes the entry of that function key

invalid if pressed. In the example below, pressing the keys numbered 3 and 4 produces no

keyboard entry.

KEY 3,""

KEY 4,CHR$(0)

1 2 ... 124 125 126 127 128 129 130 131 132 133 134 ... 559 560

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