Polynomial Definition, Fctdef, Block-Synchronized - Siemens sinumerik 840d Programming Manual

Motion-Synchronous Action
10
10.4 Actions within synchronized actions
840D 840D
NCU 571 NCU 572
NCU 573
10.4.7

Polynomial definition, FCTDEF, block-synchronized

Programming
FCTDEF(Polynomial_No.,LLIMIT,ULIMIT,a
Explanation
Polynomial_No.
LLIMIT
ULIMIT
a ,a ,a ,a
0 1 2 3
Function
FCTDEF allows 3rd degree polynomials to be
defined as y=a
0
are used by the online tool offset FTOC and the
evaluation function SYNFCT to calculate function
values from the main run variables (real-time
variables).
The polynomials are defined either block-
synchronized with the function FCTDEF or via
system variables:
$AC_FCTLL[n]
$AC_FCTUL[n]
$AC_FCT0[n]
$AC_FCT1[n]
$AC_FCT2[n]
$AC_FCT3[n]
n
10-364
FM–NC 810D 840Di
2 3
x+a x +a x . These polynomials
+a
1 N 2 N 3 N
,a ,a ,a )
0 1 2 3
Number of the 3rd degree polynomial
Lower limit for function value
Upper limit for function value
Polynomial coefficient
Lower limit for function value
Upper limit for function value
a
0
a
1
a
2
a
3
Number of the polynomial
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
08.97
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