Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 240)

5.8 DDC Instructions
5.8.9 Function Generator (FGN)
5-171
Instructions
5
( 4 ) Additional Information
The FGN instruction searches for the pair X
n
and Y
n
where X
n
≤ Input X ≤ X
n
+ 1 to calculate output value Y.
If the pair X
n
and Y
n
, where X
n
≤ Input X ≤ X
n+1
, does not exist, the calculation is as follows:
• If Input value X < X
1
,
• If Input value X > X
N
,
= Y
n
+
–
X
n
) (1 ≤ n ≤ N – 1) × ( Output value Y
Y
n+1
– Y
n
X
n+1
– X
n
Input value X
= Y
1
+
–
X
1
) × ( Output value Y
Y
2
– Y
1
X
2
– X
1
Input value X
= Y
N
+
–
X
N
) × ( Output value Y
Y
N
– Y
N-1
X
N
– X
N-1
Input value X