Oscillation - Siemens sinumerik 840d Programming Manual

Motion-Synchronous Action
10
10.3 Special real-time variables for synchronized actions
840 D
NCU 572
NCU 573
10.3.5 Machine and setting data read/write, as from SW 4
Function
From SW 4 upwards, it is possible to read and write
the machine and setting data (MD, SD) of
synchronized actions.
• Read fixed MD, SD
They are addressed from within the synchronized
action in the same manner as in normal part
program commands and are preceded by a $
character.
Example:
ID=2 WHENEVER $AA_IM[z]<$SA_OSCILL_REVERSE_POS2[Z]-6 DO $AA_OVR[X]=0
;In this example, reverse position 2 for oscillation is addressed assumed to be unmodifiable.
• Read modifiable MD, SD
They are addressed from within the synchronized
action, preceded by $$ characters and evaluated
in the interpolation cycle.
Example:
ID=1 WHENEVER $AA_IM[z]<$$SA_OSCILL_REVERSE_POS2[Z]-6 DO $AA_OVR[X]=0
;It is assumed here that the reverse position can be modified by a command during machining.
• Write MD, SD
Precondition:
The current setting for access authorization must
permit write access. It is only appropriate to
modify MD and SD from the synchronized action
when the change is active immediately. The
active states are listed for all MD and SD in
References: /LIS/, Lists
Addressing:
The MD and SD to be modified must be
addressed preceded by $$.
Example:
ID=1 WHEN $AA_IW[X]>10 DO $$SN_SW_CAM_PLUS_POS_TAB_1[0]=20
10-356
810 D 840Di
CCU2
;Changing the switching position of SW cams. Note: The switching positions
must be changed two to three interpolation cycles before they reach their position.
$$SN_SW_CAM_MINUS_POS_TAB_1[0]=30
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
12.97
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