Mitsubishi Electric Melsec Q Series Programming Manual page 369

5 OPERATION CONTROL PROGRAMS
Positive conversion
 X (Input value)  X
• X
0
Y
Output
value: Y
(X Y )
i, i
(X Y )
0, 0
Input value: X
Positive conversion
• X (Input value) < X
0
Y - Y
1 0
Y = Y + (X - X
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
(X Y
N-2,
(2) The method for output value calculation is either positive conversion (Input value:
point X, Output value: point Y) or inverse conversion (Input value: point Y, Output
value: point X) and is specified with (S1).
Each of the calculation methods is as follows.
(a) 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-1
(X Y )
N-1, N-1
(X Y )
i+1, i+1
Y - Y
i+1 i
Y = Y +
i
X - X
i+1 i
(b) When the input value is other than (a), the output value is calculated from
the first or last two points of scaling conversion data.
Y
)
0
(X Y )
1, 1
(X Y )
0, 0
Y - Y
N-1 N-2
Y = Y +
N-1
X - X
N-1 N-2
(Y < Y)
N-1
Y )
N-1, N-1
)
N-2
Input value: X
 Y (Input value)  Y
• Y
0
Y
Input
value: Y
(X - X )
i
X
• Y (Input value) < Y
X
1
X = X +
0
Y
1
(X < X
X
Input value: Y
• Y < Y (Input value)
N-1
(X - X )
N-1
Input value: Y
X
5 - 146
Inverse conversion
N-1
(X
(X Y )
i+1, i+1
(X Y )
i, i
X = X
(X Y )
0, 0
Output value: X
Inverse conversion
0
Y
- X
0
(Y - Y )
0
- Y
0
)
0
(X Y
0,
Output value: X
Y
X
X = X +
N-1
Y
(X
N-1
(X Y )
N-1, N-1
(X Y )
N-2, N-2
Output value: X
Y )
N-1, N-1
X - X
i+1 i
+ (Y - Y )
i i
Y - Y
i+1 i
X
N: Number of points
(X Y )
1, 1
)
0
X
- X
N-1 N-2
(Y - Y )
N-1
- Y
N-1 N-2
< X)
X
N: Number of points