The timer wont start because the setpoint is zero (T#0s).
Edit: actually one can gleen from the screenshot that the setpoint is 25 seconds. Not sure what goes wrong for you. I suggest you start all over.
The v5.5 sample for the FB is not correct either, since the preset time pin "PT" on the "Bell" timer is fed itself (!).
So dont copy this to TIA since it is a wrong way in v5.5 as well.
You have to decide if the timer must have a fixed setpint, or a variable setpoint.
If fixed setpoint, simply specify a time in TIME format, i.e. T#5S for 5 seconds.
If variable setpoint, you must forward another variable to the PT pin on the IEC timer.
Also, in TIA there is a more simple representation which you can use if you dont need to use the expired time value (ET pin). See my example.