how to initiate a trigger based on threshold value from DAQ

[LV_Enthu]

Hello,

         can anyone please tell me how to start a counter/trigger based upon a threshold value/??i would like to measure the amount of time

the particular input value is greater than the threshold value...

I tried out the simple VI attached, but the start time and the end time show the same values... can anyone please suggest/???

[Dennis_Knutson]

Without any data, it's impossible to know what you mean. Run this so you have data visible in the 'Signals' input. Go to the Edit menu and select 'Make Current Values Default'. Save the VI. Post that.

[LV_Enthu]

sorry, attached the wrong VI,

here you go,,, this should work....

[Dennis_Knutson]

If you connect a graph to the output of the Trigger and Gate function you would see that you are just getting a flat line out. Never used this Express VI but you have the stop trigger set to 1 sample. The simulate signal is also set to square - not sine like your comment on the front panel.

[LV_Enthu]

Apart from this VI, I am using the DAQ to acquire a signal, and determining if a particular signal is greater than a threshold value, if it is,

then start a timer.....

How to implement this in labview/??? The vi i attached was a simple program I used to start from...

[LV_Enthu]

hi,

 can any please suggest me how to solve this problem???