Hi expert,
I’m using AI signal 4-20mA with data range temperature : 0 -100C .
I find the formula in manual but it just about 0 - 20 ma : like 0- 65535
How about scale ADC in 4-20 mA
Thanks you so much .
Hello,
If I think if you want a scale from 4-20 instead 0-20, you should be able to do an offset of 4 with a scale of 4,095.9375 (65535/16)
-TIm
i see . 0- 0, 20ma - 65535 .is this mean : 4ma -> 4*20/65535 = 0.001221
temperature sensor : 4-20ma : 0- 100 oC:
–> 0—> 0.001221
–>100–>65535.
my understanding is right ?
if I understand right, do you mean that 4ma = 0 degrees celsius and that 20ma = 100 degrees celsius, I think that should be correct
yes. the sensor return : 4ma - 0oC , 20 ma - 100oC.IS this mean
we will scale in flexy : 4ma --> 0.001221
20ma -->65535
is this right?
We should be able to follow this example:
But I believe we’ll set the following:
Y1 = 0
Y2 = 100
X1 = 1/5(65535) = 13107
X2 = 65535
a = (100 - 0) / (65535-13107) = 0.001907377
b = (100 * 13107) - (0 * 65535) / (13107-65535) = -25
so y = 0.001907377x - 25