Pepper Computer Modular Computers RS232 Manual De Usuario

SMART I/O User’s Manual

October 01, 1996

Page 5 - 126

Chapter 5 Analog Modules

O_DISABLE_CONV

: This operate call tells ISaGRAF to disable the

conversion of a particular channel of a connected

SM-DAC1 module. The syntax is as follows:

<analog var> := OPERATE(<iovar>, O_DISABLE_CONV, 0);

where

represents the analog return variable and can

be zero if the operate call is supported and the

correct

<iovar>

is passed or non-zero if an

error occurred.

<iovar>

is the variable name for the channel where the

operate call is to take effect.

O_GET_LINE_STATE

This operate call allows the user to check the line

state on the current version of the SM-DAC1. The

syntax is as follows:

<analog var> := OPERATE(<iovar>, O_GET_LINE_STATE,

<var>);

where

represents the analog return variable and is

zero if an open loop is detected. Otherwise it

returns 1.

<iovar>

is the variable name for the channel where the

operate call is to take effect.

<var>

is not used.