Posted 13 Dec 2019 (edited) Hi! Does anyone know why my TON timer won't reset? When In goes false, ET does not reset itself.. The controller is a NX1P2-9024DT1 From the manual: The TON instruction outputs TRUE when the set time elapses after the timer starts. The time is set in nanoseconds. The timer starts when timer input In changes to TRUE. Elapsed time ET is incremented as time elapses. When ET reaches set time PT, timer output Q changes to TRUE. ET is not incremented after that. The timer is reset when In changes to FALSE. ET changes to 0 and Q changes to FALSE. If the timer is started and then In changes to FALSE before ET reaches PT, the timer is reset. Edited 14 Dec 2019 by kroald Share this post Link to post Share on other sites
Posted 14 Dec 2019 Figured it out. Seems one can not have the timer in the IF sentence. Moved it below END_IF and it worked. Share this post Link to post Share on other sites