Evaluation Function Synfct - Siemens sinumerik 840d Programming Manual

08.97
10
840D
NCU 572
NCU 573
10.4.9

Evaluation function SYNFCT

Programming
SYNFCT(Polynomial_No., real-time variable output, real-time variable
input)
Explanation
Polynomial_No.
Real-time variable output
Real-time variable input
Function
SYNFCT reads real-time variables in synchronism
with execution (e.g. analog input, actual value, ...)
and uses them to calculate function values up to the
3rd degree (e.g. override, velocity, axis position, ...)
using an evaluation polynomial (FCTDEF). The
result is output to real-time variables and subjected
to upper and lower limits with FCTDEF (see Section
10.4.7).
As real-time variables, variables can be selected and
directly included in the processing operation
• with additive influencing
• with multiplicative influencing
• as position offset.
Application
The evaluation function is used
• in AC control (Adaptive Control)
• in laser output control
• with position feedforward
 Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
10.4 Actions within synchronized actions
840Di
With polynomial defined with FCTDEF
(see Subsection "Polynomial definition").
Write real-time variable
Read real-time variable
Motion-Synchronous Action
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