Siemens TIA Portal: How Long are the Timers ON for?

[@taurusengineering7517]

Thank a lot for proper explanation. Good luck

[@morningstar8954]

This basic is very important.

[@ScantimeAutomationTraining]

They certainly are!

[@blaisofotso3439]

Hallo Scantoime Team, I am so confused why the second timer does not last for 1 second. What are the conditions for the output Q to be true? Inst the elapsed time should be equal to the preset time for the Q in the second timer to be on? if it last for less than 1 second , then how is the output true? Please explain. Thank you

[@mahadihasan93]

What if the second timer is TOF , Only then the second timer runs for 1 second.

[@ScantimeAutomationTraining]

Remember, the TOF only begins to run when the Enable signal turns ON and then OFF, on the falling edge of the Enable signal.