Pressure Sensor Signal

NCIVAN · Apr 17, 2014

I have a Sensor that outputs 10vdc at no pressure and drops down to 0vdc at range of 100 pressure. My program is set up to work in reverse of this or 0vdc at 0 pressure and 10vdc at 100 pressure. How can I convert this signal inside the plc? Using Siemens 1200 plc.

Mickey · Apr 17, 2014

Subtract raw data signal from raw data max.

NCIVAN · Apr 17, 2014

Mickey, thanks for the quick reply. I am not sure what you mean? The analog signal I am getting in as a real is 30853 and it goes down to 0 at 100 full pressure on sensor.

Also I like the Chinese Proverb, although some may claim to get less time on the marriage..

micky · Apr 17, 2014

Mickey said:
Subtract raw data signal from raw data max.

RawSignal-RawMax=Signal

At 0 > 30853 - 30853 = 0
At 100 > 0 - 30853 = -30853

Strip the sign then scale 0-30853 to 0-100

Mickey · Apr 17, 2014

micky said:
RawSignal-RawMax=Signal

At 0 > 30853 - 30853 = 0
At 100 > 0 - 30853 = -30853

Strip the sign then scale 0-30853 to 0-100

Subtract raw data signal from raw data max.

Turn it around..micky

At 0: 30853-30853=0

At 100: 30853-0=30853

Then scale to engineering units if you like. See formula if you need it.

(((Scaled Max-Scaled Min)/(Max Raw Input-Min Raw Input))*(Raw Input-Min Raw Input))+Scaled Min = Scaled Value

Pressure Sensor Signal

NCIVAN

Member

Mickey

Lifetime Supporting Member

NCIVAN

Member

micky

Lifetime Supporting Member

Mickey

Lifetime Supporting Member

Similar Topics