mcc

Well the point is to make my own scan timer. Thanks for the suggestion Phil. Is that really true about SL 20 being the scan time in units of 10 microseconds. I've look in the manual and the help files and have not found where it states that.

Hi I'm new to the Unitronics PLC's and I have a V350-35-B1. I'm trying to make my own scan time calculator program, I know how I want to do it I just don't know how to implement it. Here how I see it, I have an always on bit turning on a timer that is counting down in hundredths of a second. I have a counter that counting the number of scans. I have an initial on relay that turns on at the first scan and only the first scan that captures the start time from the timer. Then when the counter reaches 100000 scans it captures the stop time and then subtract the stop time from the start time. It's simple enough but as I look into the Vision program I find that I don't have timers that count down in the hundredths of seconds, the power-up bit which I though ran on the first scan actually runs before the program scan. So is there a way for me to implement this?