Dear Sarangani thanks for your quick answer.
For sure I misunderstand the meaning of "ladder function n°"...after reading your message I checked in the "help" of Unilogic about "ladder function"...If I understand each ladder function can has many regions and each region can has many row...it is correct? In the help I found that exist a instruction called "jump to region"...maybe I have to create a new region instead of a new "ladder function" and, at the end of the first region, insert the jump to region instruction...it is correct? however I don't found or better I don't understand how I have to do for enable or jump from a "ladder function" to others...can you help me in this way?
Thank in advance