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? DIGOUT.C —Demonstrates the use of the outputs by using the Demonstration Board
whose LEDs are toggled on/off via the outputs.
Before you run this sample program, use the same power-supply connections and the same
connections between the Digital I/O Card and the Demonstration Board as for the DIG-
BANKOUT.C sample program.
Once DIGOUT.C is compiled and running, the Dynamic C STDIO window will prompt
you for a channel selection. Select output channel OUT00. Next you will be prompted to
select the logic level—set a high logic level to turn LED DS1 on. You can repeat these
steps for OUT01–OUT03 and LEDs DS2–DS4. You can use a voltmeter to check the volt-
ages on the remaining outputs.
2.6.2.2 Analog Inputs
The SAMPLES\RABBITNET\RN1100\AIN subdirectory contains the following sample
programs. The sample program will use rn_find() and the product RN1100 as the
search criteria to first find any Digital I/O Cards connected to the master. The first Digital
I/O Card found will run the sample program.
NOTE: The Demonstration Board does not have to be connected to run these sample
programs.
? AIN_CALDIFF_CH.C —Demonstrates how to recalibrate the differential A/D converter
channel using two known voltages to generate constants for that channel that are rewritten
into the Digital I/O Card flash memory. The voltages being monitored will be displayed
continuously.
Before you run this sample program, connect a 0–10 V
power supply, a voltmeter, and a network of resistors to
1.2 k W
AIN03+
inputs AIN03+ and AIN03– as shown in the diagram.
Adjust the power supply starting at 0 V until the voltme-
0?10 V
51 W
1.2 k W
ter shows approximately +0.235 V at AIN03+.
AIN03?
Now compile and run the sample program. Enter the
voltage reading when prompted by the Dynamic C STDIO window. Then reverse the
power supply + and – connections and hit the Return key in the Dynamic C STDIO
window. Now enter the voltage reading again.
? AIN_CALSE_CH.C —Demonstrates how to recalibrate one single-ended A/D converter
channel using two known voltages to generate constants for that channel that are rewritten
into the Digital I/O Card flash. The voltages being monitored will be displayed continuously.
Before you run this sample program, connect a 0–10 V power supply and a voltmeter
between the selected analog channel and ground. Now compile and run the sample pro-
gram. Follow the prompts in the Dynamic C STDIO window.
? AIN_RDDIFF_CH.C —Demonstrates reading the differential A/D converter channel using
two known voltages and constants for that channel. The voltage being monitored will be
displayed continuously.
Before you run this sample program, connect a 0–10 V power supply, a voltmeter, and a
network of resistors to inputs AIN03+ and AIN03– as shown for the AIN_CALDIFF_
CH.C sample program. Adjust the power supply on until the voltmeter shows approxi-
mately +0.20 V at AIN03+.
32
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