Morning, 

I have a trouble with a TON in my program, that IEC_TIMER is a static variable in a FB.

Im not sure what Im doing wrong, so I recreate  a new FB to try it in a simpler program, the result was the same, it didnt work , I have activated its input but it IEC_TIMER.q have not activated.

So, I reduced even more the equatiom, and now, I have programmed a TON in OB1, the result was the same...

Memory has space enought ( Im using around 20% of CPU)

I cant remember if it was a limitation on the number of IEC_TIMERs (Im working with TIA PORTAL v15.1)

2 years programming and I can't program a TON timer... I think my boss  need another programmer '-.-

Thank u all!

Hello alvconsan,

check the help. There you would find, that a tag must be connected to at least one of the outputs of the timer (Q, ET) to see the status of the outputs.

Regards,

Frink

Prof gave me the answer, thanks.