Mitsubishi Electric R16MTCPU Programming Manual page 163

■When the input value is between two points of scaling conversion data
The output value is calculated from the nearest two points of the input value.
N: Number of points
Positive conversion
 X (Input value)  X
X
0 N-1
Y
Output
value: Y
(X , Y )
i i
(X , Y )
0 0
Input value: X
■When the input value is not between two points of scaling conversion data
The output value is calculated from the first or last two points of scaling conversion data.
N: Number of points
Positive conversion
X (Input value) < X
0
Y - Y
1 0
× (X - X
Y = Y + )
0 0
X - X
1 0
(Y < Y )
0
Output value: Y
Input value: X
X < X (Input value)
N-1
Y
Output value: Y
(X , Y
N-1
(X , Y )
N-2 N-2
When the input value is outside the range of scaling conversion data or calculation result of output value is
outside the range of -32768 to 32767, an operation error will occur.
(X , Y )
N-1 N-1
(X , Y )
i+1 i+1
Y - Y
i+1 i
× (X - X
Y = Y )
i +
i
X - X
i+1 i
X
Y
(X , Y )
1 1
(X , Y )
0 0
Y - Y
N-1 N-2
× (X - X
Y = Y +
N-1 N-1
X - X
N-1 N-2
(Y < Y)
N-1
)
N-1
Input value: X
Inverse conversion
 Y (Input value)  Y
Y
0 N-1
Y
Input
value: Y
(X
(X , Y
0 0
Inverse conversion
Y (Input value) < Y
0
X - X
1 0
× (Y - Y
X = X +
0
Y - Y
1 0
(X < X )
0
X
Input value: Y
Output value: X
Y < Y (Input value)
N-1
Y
)
Input value: Y
(X
(X , Y
N-2
X
4 OPERATION CONTROL PROGRAMS
(X , Y )
N-1 N-1
(X , Y )
i+1 i+1
, Y )
i i
X - X
i+1 i
× (Y - Y
X = X
i +
Y - Y
i+1 i
)
Output value: X
Y
)
0
(X , Y )
1 1
(X , Y )
0 0
X - X
N-1 N-2
× (Y - Y
X = X +
N-1
Y - Y
N-1 N-2
(X < X)
N-1
, Y )
N-1 N-1
)
N-2
Output value: X
4.8 Data Control
4
)
i
X
X
)
N-1
X
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