Remote-processing BASIC 52 Instrukcja Użytkownika Pobierz pdf (Strona 73)

RPBASIC-52 PROGRAMMING GUIDE

2-54

LINE# (Function)

Syntax: A = LINE#(line)

Where: line = connecto r number from 101 to 125 (Line ranges m ay vary. Check your hardw are

manual.)

Function: Returns status of a line at the digital I/O c onnector.

Mode: Command,Run

Use: A = LINE#(103) Reads level from digital I/O port connector number 3.

Card: Function ava ilable on all cards. Ranges will vary from card to card. See hardw are manual.

DESCRIPTION

The '#' modifier to LINE specifies the actua l line number at the d igital I/O port connector. line must range

from 101 to 125 or else a BAD ARGUMENT is returned. Line 102 is also not valid. LINE# cannot be used

for the on card opto rack (0 - 3). The line number is com puted by simply adding 100 to the connector pin

number.

LINE# returns a '0' or a '1', which correspond directly to the logic level at the connector. When using LINE#

to return the status of an opto output line, a '0' means the module is ON w hile a '1' indicates it is OFF. This is

in contrast to th e LIN E state ment which turns o n a module with a '1'. Whe n reading an opto input module , a

'0' indicates there is no voltage applied to the inputs.

The following example returns the status at digital I/O connec tor J3, pin 19 (82C5 5 port A, bit 0);

A = LINE#(119)

See LINE function for more program exam ples.

LINE, LINEB functions, LINE, LINE#, LINEB statements, CONFIG LINE

ERRORS

BAD SYNTAX When # is used for on card positions.

BAD DATA When line is out of range for a port.

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Remote-processing BASIC 52 Instrukcja Użytkownika Strona 73