Moran Posted January 27, 2016 Report Share Posted January 27, 2016 hello, i need to monitor a square wave of 3V amplitude and 190 Hz. can i display this signal on HMI trend graph? what extantion do i need ? analog input ? i am using V570. thanks. Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted February 4, 2016 MVP 2023 Report Share Posted February 4, 2016 Our analog inputs are not that fast. So no, you can't trend it. What exactly do you need to monitor - frequency, amplitude, or what? Joe T. Quote Link to comment Share on other sites More sharing options...
Moran Posted February 8, 2016 Author Report Share Posted February 8, 2016 hi joe, i need to monitor the frequency and amplitude, can i use digital input? and maybe convert the 0V -3.3V square wave to open gnd and display this on trend graph? Quote Link to comment Share on other sites More sharing options...
AlexUT Posted February 8, 2016 Report Share Posted February 8, 2016 Moran, 1.Trend have minimum sample time 0.1 sec. 2.As Joe say, Analog input is not so fast to sample 190 Hz. 3.Digital input does not sense levels, different from logical 0 and 1. So it cannot measure amplitude. 4.You can convert logical level to 0V/24V and use High Speed Counter to measure frequency, or period. But not signal amplitude. 5.With some kind of RC filter you can measure average of input signal by analog input. Trend will not show high frequency signal. This is not a scope. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.