Analog function block setpoint

[Ehsan]

Hi All

we have on plc schneider model TM 258 and we have one analog input level transmitter connect to plc then want measure the value and also we put one set point Hi and low for open and close the valve how we can manage this  program.

4 mA = ?

20 mA = ? 

[cHud]

look for hysteresis function block