LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

Sorry, Messed up my question in previous posting.Triggering one waveform and contoniously generating the other

Hi,

I am using a PCI6014 DAQ board with LAbview.I have to generate two square waveforms at my analogoutput channels. The first wave form has to be contionously generated. The second wave form has to be started on every event occurence and wait till the waveform is complete(AOWait).

Thanks.
0 Kudos
Message 1 of 4
(2,778 Views)
Hello,

If you want to generate two square waveforms, I recommend that you use the counter outputs of your PCI-6014 board. You can set up one counter to do continuous pulse train generation and setup the second counter to do triggered pulse train generation.

Do you need the signals to have different specs than 0 to 5V? The counter outputs use TTL logic level signals, so if your square wave amplitude needs to be something other than TTL, you will need to use the Analog Outputs. It is also good to know that the analog outputs share the same update clock, so getting the data to output on the AO that is started from the occurrence may be tricky. I recommend using the counter outputs if at all possible. Check the example programs that ship with LabVIEW. Foll
ow this path to find the counter example programs: Help >> Find Examples >> Hardware Input and Output >> DAQ >> Counters >> DAQ-STC.

Reply to this post if you are certain you cannot use the counter outputs.

Regards,
Bill B
Applications Engineer
National Instruments
0 Kudos
Message 2 of 4
(2,778 Views)
Please see this link for an answer:
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HFORCEKWTID=83432:5&HOID=50650000000800000022B40000&HExpertOnly=&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0
0 Kudos
Message 3 of 4
(2,778 Views)
Hi Bill,

I am using my counter for two frequency measurement purpose. Moreover I may may need a different voltage waveform in future.

My application requires one signal to be present only when a event triggers it(Based on machine status). This event is non periodical. Another signal has to be periodical as it is required for triggering periodical measurement.Please suggest

Thanks
0 Kudos
Message 4 of 4
(2,778 Views)