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Example

Definitions

● Function number: 1

● Lower and upper limit value: -100, 100

● Gradient of the characteristic: a

= 1

● The operating point should be located at the center of the characteristic. Based on the

setpoint position of axis XA in the WCS at the instant that the function is defined in the NC

program, the characteristic must be shifted in the negative Y direction: a

= -a

* XA

= -1 *

$AA_IW

● a

= a

= 0

Characteristic

UL Upper limit value

LL Lower limit value

Setpoint of axis XA at the time that the function is defined in the NC program

Programming

Program code Comment

FCTDEF(1,-100,100,-$AA_IW[XA],1) ; Function definition

3.13.4.2 Write online tool offset continuously (PUTFTOCF)

Using the predefined procedure PUTFTOCF(...), an online tool offset is executed based on a

polynomial function previously defined with FCTDEF(...) (Page 751).

Note

The online tool offset can also be realized using a synchronized action.

For further information, see Function Manual Synchronized Actions.

Work preparation

3.13 Tool offsets

NC programming

752 Programming Manual, 12/2019, 6FC5398-2EP40-0BA0

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based

Siemens SINUMERIK 840D sl Programming Manual

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