Hi experts. I'm using logo to monitor CO2, temp, humidity, ORP, salinity and PH. Based on the value, it triggers switches etc. Using Analog Input ports 0-10v.

I would like to show lowest and highest reading over a period of 24 hrs. And read it and show over a HMI device.

Anyone who can suggest a solution ?

Thanks !

Take a look at this Siemens web site:

LOGO!-Library – Functions for analog value processing and communication

There is a entry with examples:

Storage of analog min./max. Values