How should i read two counter through software of Ni 6602

Hello all,
i want to know that how should i read two counters same time of NI 6602 using c#.net.
Please guide me.

Hello,
I have a couple of suggestions for you to look into and determine which is best for you application.
- Use a Two Edge Separation task to count ticks and not seconds (by changing the units) between a start and stop trigger. The two trigger signals will need to come from different sources. The KnowledgeBase (KB) linked below describes the task in further detail. This KB explains why a reference trigger is not recommended. Open up the C# example in the Measure 2 Edge Separation folder from the location listed in the previous post.
AE KB 2IK8FRXA: How Do I Count Digital Edges Between a Start and Stop Trigger on an NI 6602 Counter/...
- Use an Arm Start Trigger as a start trigger with the Count Digital Event task. It will only allow of a start trigger and not necessarily a stop trigger. The Developer Zone link below provides a coded example.
Developer Zone: DAQmx - Event Counting on Multiple Counters with Digital Start Trigger (TIO) - LabVI...
- Use an Arm Start Trigger to synchronize multiple Count Digital Edge tasks and paired with Pause Triggers to pause acquisition based on source level.
Developer Zone: Synchronous trigger start of multiple counters and pause independently
For more information on the type of triggers mentioned, refer to the DAQmx Help.
Samantha
National Instruments
Applications Engineer

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Hi Tiano
LabVIEW General
Ask:
Please enter a one-line summary of your question
Resources
• Technical Support
• Development Library
• Measurement Encyclopedia
"data/time reading into chart"
"In the attached file, I am trying to read the first column of data, and the next column is the value on the x-axis I want it plotted at. How do I read two columns of different data? I have looked in the books I have access to and the help within Labview but am still having trouble.
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data_set (Plain Text, 3K)
-posted by Ellie on 9/11/2001
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Graph data from file (Binary Executable, 20K)
data.txt (Plain Text, 3K)
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Rate this answer:
Mikael Garcia on 9/11/2001 answered:
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ExtractAndPlot.vi (Binary Executable, 36K)
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Ellie on 9/12/2001 commented:
"Thank you. I am trying to get the data from the text file into a string and am having some trouble. I am reading the file from a spreadsheet, and sending the output array to "Array to Spreadsheet String", but I'm not sure this is what I want to do. Is there another way to make an array into a string? Do I need to reformat my data?
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data_1 (Plain Text, 3K)
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ReadExtractandPlot.vi (Binary Executable, 35K)
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Rate this answer:
I intend to read from a .txt file that contains a column of numbers. After reading I want to display it as a waveform. In fact the numbers represent points along a waveform/graph of Flow vs. time. Thus I want to have this info in the chart or graph with flow in the y0axis and time in the x-axis. Can someone give me some detailed help please? Thank you in advance.
Attachments:
The_file.txt ‏18 KB

All you have to do is use Read From Spreadsheet File.vi that's on the File I/O palette. For your example .txt, set the Transpose input to true and wire the First Row output to a waveform graph. The only problem I see is that since your file doesn't contain any sampling info, the time axis will be relative. If have that information elsewhere, then you can put a build waveform function between the read and the graph. Wire the First Row output to the Y input Build Waveform and add t0 and dt values. I've attached an example.
Attachments:
Graph_from_text.vi ‏29 KB

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