Pepper Computer Modular Computers RS485 - Manual (Page 281)

SMART I/O User’s Manual
©1996 PEP Modular Computers GmbH October 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.