Datalogging of XY graph or Variables?

[nitinjainitm@yahoo.co.in]

Dear Friends,

          i have a VI and in this VI i m Plotting a XY(Voltage Vs Current) graph succesfully but i want log this data for several years and if i want to retrive this data from that data file with timing means on the particular date & Time how the X Vs Y Graph was looking . so pls give me the solution for having the data on the XY graph.  

[DFGray]

The VI you posted has several subVIs not included, so we need more information:

1. How fast are you taking and logging data (one per second, one per hour, ...)?
2. What format do you want the data stored in?  You are using two DBLs for your plot.  Would you prefer a timestamp for the X coordinate?
3. Are you reading the data from multiple platforms (Windows, Linux, RT, OSX, ...)?

ASCII, raw binary, or TDMS could all be good solutions, depending on your requirements.  Look at the LabVIEW examples on file I/O.

[nitinjainitm@yahoo.co.in]

Thanks for reply me

1. I want to log data in one per minute.
2. I am logging data in citadel 5, and read that data this file.  If any other solution is better than citadel library so please tell me. So I will use in my VI.
3. I am using window XP (SP2) with LAbview 8.6.1 

Regard,

Nitin Jain

[DFGray]

Citadel is a fine solution and is designed to be safe, much safer than most solutions.  You should have no problems with your data rate.  Check out the LabVIEW examples for how to implement.  Unfortunately, I have no experience with Citadel, so cannot help you much.

Do you need to read the data using software other than LabVIEW?