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Commands - 92

OPTO

Process Statement

SYNTAX: OPTO channel, value

PURPOSE: To turn output modules on and off on 24 position opto-isolator racks that are external to the card.

REMARK S: The channel parameter ranges from 0 to 23 (0-3 on RPC-30) or 100 to 123 and corresponds to the

position numbers on the opto-module racks.

The value is the state of the output. To turn an output on, enter a 1 or ON. To tur n the output off,

enter a 0 or OFF. The ON and O FF execute faster than 1 or 0.

Inputs and outputs are ac tive low when interfacing with opto-isolator r acks. Thus, writing a “1” to

an opto output module will turn it off. This confusion is eliminated with the OPTO statement. It

automatically inverts the logic so that a “1” represents on and a “0” represents off.

The OPT O statement is similar to the BIT statement in that individual I/O bits or channels can be

controlled. It differs in that it is used specifically with opto-isolator racks and it executes much

faster.

RELATED: OPTO function

EXAMPLE: 10 OPTO 3,ON

20 PRINT OPTO(103)

RUN

In this example channel 3 was turned on. Thus, a 1 is returned.

ERROR: < Data negative> – channel and value

< Data out of range> - if channel > 23 or value > 1 or ON/OFF

1 2 ... 120 121 122 123 124 125 126 127 128 129 130 ... 207 208

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Remote-processing CAMBASIC Manual de usuario Pagina 125