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SMART I/O User’s Manual
©1996 PEP Modular Computers GmbHOctober 01, 1996 Page 5 - 125
5
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.