I tried to start this timer but it didn't start counting the time as shown in the attachments. 
I thought this is due to the scan cycle so the timer resets itself every cycle. I deleted the timer block and tried to start from the "start TON timer" instruction but it didn't start too. 

This is my second try to use the Start timer instruction. 

Any help yet?

Before you will know what you are doing, use a timer only once in the code. In first attempt you are using it twice.

For familiarizing use M-area instead of physical inputs/outputs. I.e. instead %I0.0 use e.g. %M10.0 and so on. You should not use the same M tag for input and output.

Do not access physical I/Os directly, i.e. no %I0.0:P or %Q0.0:P. I do not think you need it at this stage. Simply use %I0.0 or %Q0.0.

In your second attempt, make sure that the input changes from FALSE to TRUE while the PLC is running.

Hi Mickey_2022,

please also check instance of timer in I-DB. The start value of parameter "IN" must be "false"!

If start values of timer instance i DB was modified (for example due to a snapshot), the timer will not work correctly.

regards

sancruz