I have upgraded from a nano to a FMD1616 and am trying to run a program that worked on the nano that I transfered to the FMD. I am trying to read the pulse period on input #4 on every scan and I did do a PMON 2 on the first scan. My statement is "temp1=PULSEPERIOD (2)" and when I monitor temp1, the numbers are all over the place, from 300 to 400,000 or more and sometimes negative. I am using an old nano to trigger input #4 with what I believe to be a pulse every second; on for 2 tenths and off for 8 tenths. My expectation is to see a number in temp1 around 1,000,000. I do use input #4 to trigger other events functions. What all am I missing??