Hi there,
Just following up after some relevant discussion in Basic timer question :
If you set your Timer interval to 1000ms, and set Loops to true, you can use the Timer block Time in milliseconds to return the remaining time in milliseconds from this timer.
If Count Up is false, you will get the remaining time from the Timer’s interval in milliseconds.
If Count Up is true, you will get the elapsed time from the Timer’s interval in milliseconds.
You can see a project that demonstrates this behavior here.