Hi. I need to read analog input from NH3 sensor !! The output is 0-24 mV,and te range of sensor is 0-14 mg/l I need to do this with step7 v5.4,and it MUST be with LADDER logic !!! After that,i need to display the results in wincc panel ! I just need to program this,its a faculty project ! I do not need to simulate step7 and wincc,i just need panel to simulate numbers between 0 - 14 mg/l . Have anybody idea how to do this with Ladder logic in step7 v.5.4 sp1 and wincc flexible 2007 !! Thanks !!