seiral port read and write timing issues

[Almost]

I have probably a simple question but am new to signal express.  I desire to read and log data from an RS232 balance in addtion to reading and logging voltages using signal express.

I have created a labview vi  and incorporated into signal express.  It reads and logs the balance fine except I am unsure  of how to control the execution  (timing)  of the read and write process.  It appears to run continusouly and reads the balance and creates a log file with time steps of less than a second or so.

How can I have this step run and log data at the same sample period as the voltage readings?  Also, how can I combine this sample with the voltages into one data log file?  Currently it creates a seperate data log file for the balance VI.  I wish all the reads (voltages plus balance) to be included into one log file.

I did look for a balance IVI type of driver but could not find one so that is why I am taking the route I am on.



Any pointers would be helpful.

[O_Proulx]

Hello Almost,

I think the best way to solve your issue might be to convert your signal express project (for analog signal acquisition) into LabVIEW code (serial and file IO).  You can look at this article for help on converting your signal express code to LabVIEW.

If you need more assistance, please do not hesitate to post back.  I suggest also posting your VIs on the forum.  Have a great day.