Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 76

Processing details
■Inverse broken line correction
This function block outputs values according to a function generator pattern that consists of SN (the number of break points =
0 to 48) from the output variable OUT_ with regard to the values input from the input variable IN.
Ex.
When the number of break points is 4 (SN = 4)
Y
Y4_
Input(IN)
Y3_
Y2_
Y1_
X1_
• Processing details
Input (IN)
IN  Y1_
Yi-1_ < IN  Yi_
(i = 2 to n)
IN > Yn_
Xi_: Output coordinates
Yi_: Input coordinates
IN: Input value
OUT_: Output value
• Set the input coordinates (Yi_) as follows: Yi_  Yi + 1. (For Yi_ > Yi + 1_, the values to Yi_ are valid as break points.)
• If multiple Xi_ coordinates exist for a single Yi_ coordinate, the Xi_ coordinate with the smaller Yi_ coordinate is applied.
Ex.
Y1_ = Y2_
When the input coordinate (Y1_ = Y2_) is input to the input (IN), the output coordinate (X1_) is output.
Y
Y4_
Y3_
Input(IN) Y1_=Y2_
• Relation between the range of the number of break points (SN) and processing
Number of break points (SN)
SN = 0
0 < SN  48
SN < 0 or 48 < SN
5 CORRECTION OPERATION
74
5.2 Inverse Function Generator (M+P_IFG)
X2_ X3_
X1_ X2_
Output(OUT_)
X4_
Output(OUT_)
Output (OUT_)
OUT_ = X1_
Xi_-Xi-1_
OUT_=
Yi_-Yi-1_
OUT_ = Xn_
X3_ X4_
Processing
No processing is performed.
Broken line correction processing is performed.
An operation error occurs.
X
×(IN-Yi-1_)+Xi-1_
X