How to run the program for specified time

Dear Friends,
I have a small problem, I want to run my labview program for specified amount of time, Say for example it might be 1 hour or 5 hours or 10 minutes or even milliseconds(The time will be specified by the user).
How to write programs for this
And I want to get the system time in an instance, how it can be achieved,
Could you please help me?
Regards,
Rathan

Hi,
Herewith my screenshot attached. There are thre inputs thres, tempX, xValue, it is in side the while loop.'xValue' will be acquired every iteration, It will be saved through shift register and acquired to 'tempX' for the next iteration, 'thres' is a constant value. I'm doing some logic, and calculating the dvalue and convert it to a string and concatenate it with end of line character, then after writing it into a file.
In the logic, inside of the functional logic I'm assigning some values dValue, if the logic is true or else dvalue will be 0
What I require is I don't want to write the dValue in to a file, if it is equal to zero. Could you please help me, how to tackle this problem?
Thanks.
Regards,
Rathan
Attachments:
writing except 0.GIF ‏9 KB

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