Pepper-computer Modular Computers RS485 Manuel d'utilisateur télécharger pdf (Page 281)

SMART I/O User’s Manual

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 two

red LEDs on the board’s front panel. The syntax

is as follows:

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

where <analog var> 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_LED2_ON,

OA_LED1_OFF or OA_LED2_OFF.

O_ENABLE_CONV : This operate calls tells ISaGRAF to enable the

conversion of a particular channel of a connected

SM-DAC1 module. The syntax is as follows:

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

where <analog var> 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.

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Pepper-computer Modular Computers RS485 Manuel d'utilisateur Page 281