Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 245)

5.8 DDC Instructions
5.8.10 Inverse Function Generator (IFGN)
5-176
( 4 ) Additional Information
The IFGN instruction searches for the pair X
n
and Y
n
where Y
n
≤ Input Y ≤ Y
n
+ 1 to calculate output value X.
If the pair X
n
and Y
n
, where Y
n
≤ Input Y ≤ Y
n+1
, does not exist, the calculation is as follows:
• If Input value Y < Y
1
,
• If Input value Y > Y
N
,
= X
n
+
–
Y
n
) (1 ≤ n ≤ N – 1) × ( Output value X
X
n+1
– X
n
Y
n+1
– Y
n
Input value Y
= X
1
+
–
Y
1
) × ( Output value X
X
2
– X
1
Y
2
– Y
1
Input value Y
= X
N
+
–
Y
N
) × ( Output value X
X
N
– X
N-1
Y
N
– Y
N-1
Input value Y