You timer FGV is fine, you just need to move the controls in your main into the loop so they are read every iteration. If you controls are outside the loop, they populate the loop tunnels with static values. Once inside the loop, those controls are never read again, so they retain whatever initial value they have.
If you turn on highlight execution or probe those inputs, you'll see the values coming from the tunnels on the left side of the loop don't change with changes to the front panel control state.
When you start the VI, make sure the enum is set to "start" and the target time is something reasonably high (10s works well). Then, once you have started the VI, change the enum to "Read Time". That will then start updating the indicators.
I forgot to mention I also changed the boolean constant on the stop button of your FGV from F to T. If you set this to true, the loop inside your FGV will run indefinitely and will never return any values to the calling VI. You want your FGV to execute 1 iteration per call and then call it in a loop if you need to query it more often.
