Pepper Computer RS485 User Manual

SMART I/O User’s Manual

March 12, 1996

Page 5 - 27

Chapter 5 Analog Modules

A complete list of the operate

COMMANDS

may be obtained by selecting a

project from the ISaGRAF projects group, opening an application and

observing the Common defines in the Dictionary pull-down menu. Note that

not all calls in the list may be used within the SMART I/O environment

however, the calls applicable to this module are :

O_INIT_CODE

: The syntax and usage have already been explained.

O_SET_LED

: This operate call allows the user to control the

yellow LED on the board’s front panel. The syntax

is as follows:

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

where

represents the analog return variable and can

be zero if the operate call is supported and the

correct

<var>

is passed or non-zero if an

error occurred.

<iovar>

represents any module variable and

<var>

represents the LED to be controlled and must

be one of

OA_LED1_ON

OA_LED1_OFF.

O_ENABLE_CONV

: This operate calls tells ISaGRAF to enable the

conversion of a particular channel of a connected

SM-DAD1 module. The syntax is as follows:

<analog var> := OPERATE(<iovar>, O_ENABLE_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.