Yaskawa MP900 Series Machine Controller New Ladder Editor - Manual (Page 157)

1.7 DDC Instructions
1-147
1
Double-length Integer Type Operation (Number of Data: N = 20)
#L00000 to #L00080 are used for the parameter table.
Real Number Type Operation (Number of Data: N = 20)
#F00000 to #F00080 are used for the parameter table.
1.7.10 INVERSE FUNCTION GENERATOR Instruction (IFGN)
„ Outline
The IFGN instruction generates a function curve according to the contents of a previously
set parameter table. The input to the IFGN instruction can be integer, double-length integer,
or real number data.
The configuration of the parameter table differs according to the type of data.
If the data set in the parameter table for the IFGN instruction are X
n
and Y
n
, the data must be
set so that Y
n
is less than or equal to Y
n+1
. The IFGN instruction searches for an X
n
/Y
n
pair
within the parameter table in which Y
n
is less than or equal to Y which is less than or equal
to Y
n+1
from input value Y and calculates the output value X.
Deviation input value
Head address of parameter table
FGN output value
Deviation input value
Head address of parameter table
FGN output value
Table 1.24 Integer Type IFGN Instruction Parameters
ADR Type Symbol Name Specifications I/O
0 W N Number of data Number of pairs of X and Y IN
1 W X1 Data 1 IN
2 W Y1 Data 1 IN
3 W X2 Data 2 IN
4 W Y2 Data 2 IN
••• ••• ••• ••• ••• •••
2N-1 W XN Data N IN
2N W YN Data N IN