Siemens sinumerik 840d Programming Manual page 365

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• The system variables can be written from the part

program or from a synchronized action. When

writing from part programs, program STOPRE to

ensure that writing is block synchronized.

• SW 4 and higher:

The system variables $AC_FCTLL[n],

$AC_FCTUL[n], $AC_FCT0[n] to $AC_FCTn[n] can

be modified from within synchronized actions

(not SINUMERIK FM-NC,

not SINUMERIK 840D with NCU 571).

When writing form synchronized actions, the

polynomial coefficients and function value limits are

active immediately.

Programming example

Polynomial for straight section:

With upper limit 1000, lower limit –1000, ordinate

=$AA_IM[X] and linear gradient 1 the

polynomial is:

FCTDEF(1, -1000,1000,$AA_IM[X],1)

SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition

10.4 Actions within synchronized actions

Motion-Synchronous Action

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