get date time in seconds

[newbeginer]

Hi I am using get date time in seconds, function to send the current date and time to a sub vi in which I can use it to calculate the time difference in waveform's time stamps and the time when it started to get the time passed in seconds. Thus I wnated to know that if I pass this value to a sub-vi will this value be constantly updated in the sub-vi or will it remain constant until the execution of the sub-vi is over.

[Yamaeda]

Unless you actively change it it'll retain it's value.

[krispiekream]

if you are passing date/time through the subvi it will remain constant until the execution of the sub-vi is over. 

it will update once the main vi updates it and passes the new value to the subvi again.

[tbob · Accepted solution]

Yes it will remain constant because the time was read only once, from the main.  Whatever value is passed to the subvi stays the same.  If you want an updated time, you need to put the Get Date/Time function inside the subvi.