How to Generate ramp waveform in LabVIEW

[prasad145]

Dear Friends,

I want to generate an analog voltage waveform with initially 0V output for 5 sec followed by a ramp waveform with 1V/sec to reach 5V in sec. After reaching the 5V the waveform should stay at 5V for another 10sec. How can i Generate this LabVIEW please suggest me. I have attached the figure for detail 

Thank You 

[GerdW]

Hi prasad,

waveform with initially 0V output for 5 sec followed by a ramp waveform with 1V/sec to reach 5V in sec. After reaching the 5V the waveform should stay at 5V for another 10sec.

So there are 3 parts in your waveform:

1. a ramp from 0 to 0 with a duration of 5s
2. a ramp from 0 to 5 with a duration of 5s
3. a ramp from 5 to 5 with a duration of 10s

To create this you basically need three functions: RampPattern, BuildArray and BuildWaveform.

See how far you get. In case of problems attach your VI with your questions…

[prasad145]

Dear Sir,

I have Created this Pattern in Control and simulation loop. But I want to create the same in LabVIEW panel. I have attached the VI. Please help me to create the waveform in LabVIEW.  

[GerdW]

Hi prasad,

as I wrote before:

You basically need 3 functions: RampPattern, BuildArray and BuildWaveform.

So how far you get and post your VI for any other questions!

It's your homework - and you get the credit for learning LabVIEW…

[prasad145]

Dear Sir,

I created The VI as you told. But Do i Need To add these waveforms or any other Thing that i can do ? 

[GerdW · Accepted solution]

Hi prasad,

why do you create 3 waveforms when you only need one?

All those ramp parameters were different to your previous requirement…

[prasad145]

Dear Sir,

Thank You for the Result, I have a problem in building an array its not showing adding arrays its adding elements. How can i convert that element into array format. Please suggest. I attached the VI. 

[prasad145]

Thank You Sir,

I got the result. I got how to create that element to array type. Thank You for the Support.

[prasad145]

Dear Sir,

Here I have one more problem to generate analog waveform. Because there is no sample information. How can I add sample information to generate the voltage? I have attached the Application VI using the above ramp waveform. Please help me to generate analog voltage. 

[GerdW]

Hi prasad,

get rid of that ExpressVI (aka DAQAssistent) and create a proper DAQmx task with useful settings!

Right now the task is created with "1 sample on demand" timing - and you wonder about not being able to output a waveform?

LabVIEW comes with a huge example library. There are a lot of examples about DAQmx function. There are examples showing how to output waveforms. You can even use the timing information from your waveform for your DAQmx task…