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int rn_anaOutVolts(int handle, int channel,
float voltage, struct rn_dacCalTable *tables,
int reserved);
Sets an analog output channel to a voltage using previously set calibration constants to obtain the desired
voltage. Remember to run the rn_anaOutRdCalib() function before executing this function so the
calibration table will contain valid data. Here's an example.
for(channel=0; channel < 8; channel++) {
rn_anaOutRdCalib(device0, channel, &DacCalTable1, 0);
}
If the D/A Converter Card is set to the asynchronous mode of operation (the default mode), the output
channel will be updated at the time the raw data are being written.
If the D/A Converter Card is set to the synchronous mode of operation, all the D/A converter outputs will
be updated with the raw data values previously written (or default value of zero) when the
rn_anaOutStrobe function is executed.
The voltage range of the D/A converter outputs will be 0–10 V (default) or one of the other voltage range
options previously set with the rn_anaInConfig() function. Make sure that the DCIN for the D/A
Converter Card is at least 3 V more than the maximum voltage of the D/A converter output voltage range
you will be selecting.
Configuration
Voltage Ranges
Code
0
1
2 *
3
4
5
Channels 0–1
0–2.5 V
0–5 V
0–10 V
0–5 V
0–10 V
0–20 V
Channels 2–7
0–10 V
0–10 V
0–10 V
0–20 V
0–20 V
0–20 V
* Default setting after reset
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to establish the
handle.
channel is the channel number (0 to 7) corresponding to AOUT0–AOUT7
voltage is the desired output voltage, which must be less than or equal to the maximum voltage in the
voltage range specified by the rn_anaInConfig() function
rn_dacCalTable *tables is a pointer to a table structure that contains the calibration constants
for channels 0–7 for the selected mode
reserved is reserved for future use. Set to 0.
RETURN VALUE
The status byte from the previous command and a return pointer to the voltage input data. -1 means that
device information indicates the D/A Converter Card is not connected to the master.
SEE ALSO
rn_anaOutConfig, rn_anaOut, rn_anaOutStrobe
94
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