ni.com is currently undergoing scheduled maintenance.

Some services may be unavailable at this time. Please contact us for help or try again later.

LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

buffer overflow problem

hi
i am using labview 8.6 with DAQ device ni-USB 6212. i am aquiring a Analog squarepulse of 0.5 Hz continuasly. i am having a problem with buffer overflow,  it is skiping one complete periode every after few cycles. can any body have some idea how i gonna fix this problem how to increase the buffer size? or is there any other solution?, bye the way i am using DAQ assitance express vi in labview to aquire the waveform.
 let me explain the situation a bit more, what i am doing in this vi is generating a digital pulse and then aquiring that pulse back on Analog input channel of DAQ 6212, the other signal is from a pressure sensor, i am measuring a rough time delay between both signals and then writing it into an spreadsheet, but the problem as i said that it skips one cycle during the acquisition.
the number of samples i setted to 1k and i run that test for 20 minutes or some time more
the setting for digital pulse is:
High time is 500ms or 1000ms
Low time is 500ms or 1000ms
 
 i am posting my VI  and the result in excel file to make my point more clear.may be it gives better idea of  problem i am facing. the code is really messy but hope u will understand.
 
thanks
0 Kudos
Message 1 of 2
(2,593 Views)
Duplicate post.
Message Edited by Ravens Fan on 03-17-2009 11:02 AM
0 Kudos
Message 2 of 2
(2,554 Views)