Delta AH500 - 8.3 Installation and Wiring

AH500 Programming Manual
6-102
x=Source value (S
1
)
b=Offset =Minimum destination value–Minimum source value×Slope
The parameters above are being substituted for y, k, x, and b in the equation y=kx+b, and the
operation equation in the instruction is obtained.
y=kx+b=D=kS
1
+b=Slope×S
1
＋Offset＝Slope×S
1
＋Minimum destination value–Minimum
source value×Slope=Slope×(S
1
–Minimum source value)＋Minimum destination value
=(S
1
–Minimum source value)×(Maximum destination value–Minimum destination
value)÷(Maximum source value–Minimum source value)＋Minimum destination value
9. If S
1
is larger than the maximum source value, the maximum source value will be the value in
S
1
. If S
1
is less than the minimum source value, the minimum source value will be the value in
S
1
. After the input values and the parameters are set, the output curve is as shown below.
Example 1:
1. Suppose the value in S
1
is 500, the maximum source value in D0 is 3,000, the minimum
source value in D1 is 200, the maximum destination value in D2 is 500, and the minimum
destination value in D3 is 30. When X0.0 is ON, the instruction SCLP is executed, and the
scale value is stored in D10.
2. The operation equation: D10=[(500–200)×(500–30)]÷(3,000–200)+30=80.35
80.35 is rounded off to the nearest whole digit, and becomes 80. 80 is stored in D10.