Polynomial Coefficients, Parameters ($Ac_Fct - Siemens SINUMERIK 840D sl Function Manual

References
For a detailed description of the function, refer to:
Function Manual, Special Functions, Section "Path length evaluation (W6)"
3.3.16

Polynomial coefficients, parameters ($AC_FCT ...)

Function
Using the FCTDEF function, as a maximum, a 3rd degree polynomial can be defined:
f(x) = a
Note
The definition must be made in a part program.
Syntax
FCTDEF(<Poly_No>,<Lo_Limit>,<Up_Limit>,a
Meaning
Parameter
<Poly_No>:
<Lo_Limit>:
<Up_Limit>:
a0, a1, a2, a3:
Note
Polynomial coefficients (a
FCTDEF(...) function.
System variable
Read and write access to polynomial coefficients and parameters is also possible from
synchronized actions via the following system variables:
System variable
$AC_FCTLL[<Poly_No>]:
$AC_FCTUL[<Poly_No>]:
$AC_FCT0[<Poly_No>]:
$AC_FCT1[<Poly_No>]:
Synchronized actions
Function Manual, 08/2018, 6FC5397-5BP40-6BA2
+ a x + a x + a x
2 3
0 1* 2* 3*
, a ) that are not required can be omitted when programming the
2 3
3.3 System variables for synchronized actions
,a ,a ,a )
0 1 2 3
Meaning
Number of the polynomial function
Lower limit of the function values
Upper limit of the function values
Polynomial coefficient
Meaning
Lower limit for function value
Upper limit for function value
a
0
a
1
Detailed description
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