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function generator or polynomial block in PLC5

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How can I create a function generator or polynomial in PLC5/80?
By this I mean I need a eleven point curve that changes the output based on the input.
I do this all the time with DCS logic, but I don't see a "Polynomial" of "Function" block in RSLogix5.
A simple curve might look like this.

input   output  
x1= 0 y1= 0
x2= 10 y2= 20
x3= 20 y3= 31
x4= 30 y4= 49
x5= 40 y5= 59
x6= 50 y6= 79
x7= 60 y7= 101
x8= 70 y8= 142
x9= 80 y9= 178
x10= 90 y10= 224
x11= 100 y11= 300

typical-curve-2-screenshot.jpg.045e16af3

 


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