How to extend the analog inputs and outputs - PLC scaling examples

Analog IO connection either 4-20mA or 0~10V pressure sensors, level probe and other analog devices. Since the programmable logic control plc or control engineer, you will need to get some knowledge from the PLC IO expansion modules, analog signal. Zoom helps the analog value measurement unit (pressure, level, etc.).
Most industrial applications often require measurement of engineering units to provide more meaningful data.
Input method as an example
If we want from our analog cards 32000 (engineering units) measured from the tank level 0-65 m so our L = 0, H = 65 maximum. From the analog input current value A13454. Now, if we calculate using our formula, we'll get on the current level of 23.7 meters.
Now the situation looks slightly different analog output module.
Digital PLC program must calculate the value is sent to the plc analog input output io modules. There are many ways to do this, but most industrial applications, if you use the measuring engineering units understanding easier.