Fpsigma help

hi, i have to do this program...
my sensor sensed five times, the counter have to show "5"
but the CT in this PLC can only count down.. and if i use f level high instruction it count up to 124559 ++ and count down to -825720++

i think i have to use comparison is it?? but i dont knw how to use!
Any1 can teach/tell me wht to do?!!

The manual:
http://www.ctiautomation.net/PDF/Panasonic/Panasonic-FP-Sigma-Manual.pdf

says that you can have a counter (CT) that decrements (counts down) from the preset value 'n' -OR- you can have an Up/Down counter (F118 UDC) that has an additional input that controls the count direction.