Where is your VI? We can't help you with your VI if you don't attach it to your post.
What timer are you talking about? What power supply?
Solution for what?
Please attach the VI and an actual question rather than just throwing out a few phrases and asking for a "solution" to that.
Please Check with Elapsed Timer Concepts
The VI is made to keep running......I want the timer to be on when I connect the power supply to the com port...
Plz give me the solution for this
We cannot "give you the solution for this". We don't know (because you haven't told us):