Using PWM and digital outputs of myDAQ to power multiple solenoids

Hello,
I am attempting to use LabVIEW and myDAQ to power 3 independent solenoids with PWM. I am new to Labview, so I am having trouble grasping the best was to use a digital output to power my solenoids. I have many codes to generate PWM to digital output, but I cannot figure out how to actually power my solenoid from these signals. Any help would be greatly appreciated.
Zach

Google ULN2003 which is a relay/solenoid driver chip. The digital outputs of your card feed to the inputs of the chip, Review the max current/voltage specs of your solenoids and compare to teh driver chip max ratings to ensure the chip can power them.
How fast do you plan to PWM the solenoids? Can they achieve your PWM rate?
-AK2DM
~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~

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Error -200279 with simultaneous analog input (different devices) and digital output.

Hi guys,
I am a beginner in Labview and have been dealing with this problem for a couple of weeks now and just can't seem to get it completely right, I have a feeling there are a few small bugs in my code/hardware setup.
I am running an scxi-1000 chassis with a 1600 module and 1302C along with a 1303 accesory for temperature measurements, this is connected to four thermoucouples. Unfortunately I have a limited number of modules available so I am also using a PCI-6221 DAQ card with an scb-68 breakout box used for a digital output and analog input voltage channel. Attached is my labview program. When I run the code at a 50 Hz sampling rate it runs with no errors but the data file comes out extremely wrong, this is also attached. When I run the code at 100 Hz I get error-200279 after a few loops. I used to have 2 daqmx timing VIs (one for each input), but the same error would eventually happen, I have also tried increasing the buffer size on said timing VI. I am also using an old computer (Pentium IV) could this effect the program?
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Attachments:
tc_2.txt ‏1102 KB
FinalCombined_2.vi ‏128 KB

Ok this makes sense. I have made the suggested modifications but still getting the same error with sampling rates of 100 Hz or higher. Could you check that I have implemented the queue VIs properly (new file attached)? Also when running at 50 Hz in debug mode it does not look like the second while loop (with the dequeue element) comes into play until I hit the stop button, once I hit the stop button I get the following error:
Error 1 occurred at Dequeue Element in FinalCombined_2.vi
Possible reason(s):
LabVIEW: An input parameter is invalid. For example if the input is a path, the path might contain a character not allowed by the OS such as ? or @.
=========================
NI-488: Command requires GPIB Controller to be Controller-In-Charge.
This leads me to believe I have programmed the queue elements incorrectly.
Thanks for your help, any suggestions are greatly appreciated.
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Attachments:
FinalCombined_2.vi ‏102 KB

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I love the smell of napalm in the morning
Attachments:
DIO simultaneously error.vi ‏31 KB

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Did you have any luck with the example Raven sent you?
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Andy Piper <[email protected]> wrote in message news:<[email protected]>...
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Using pwm to power solenoid

Hello,
I am new to electronics and would like to power a solenoid using pwm and digital output from myDAQ. Please help.
Zach

See duplicant here:
http://forums.ni.com/t5/LabVIEW/Using-PWM-and-digital-outputs-of-myDAQ-to-power-multiple/m-p/2615449...
-AK2DM
~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~

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Attachments:
1.png ‏51 KB
2.png ‏49 KB
3.png ‏49 KB

http://forums.ni.com/t5/Academic-Hardware-Products-ELVIS/bd-p/10

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Solved!
Go to Solution.
Attachments:
control_v2_DAQ loop.vi ‏46 KB

Robert, the specific error that I get is:
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Attachments:
control_v2_ML_simple.vi ‏83 KB

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guh. I'm retarded. Somebody delete this topic

Using PWM and digital outputs of myDAQ to power multiple solenoids

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