Protection Window Extension; Activating The Protection Function; Axis-Specific Acceleration - Siemens SINUMERIK 840D sl Function Manual

TE9: Axis pair collision protection
21.3 Startup
21.3.8

Protection window extension

The protection window can be expanded using the protection window (Page 749) extension
function. The protection window extension is set in the following item of machine data:
MD61533 $MN_CC_PROTECT_WINDOW_EXTENSION[<axis pair>] = <extension>
The resulting effective protection window of an axis pair is as follows:
Effective protection window = $MN_...WINDOW (protection window) +
$MN_...WINDOW_EXTENSION (protection window extension)
Note
Machine data change
A change to machine data item $MN_...WINDOW_EXTENSION[<axis pair>] may also be
made when the protection function is active, for example, from the part program and activated
when "NewConfig" is initiated.
21.3.9

Activating the protection function

The function is active if the following conditions are met:
● A valid machine axis pair is entered in machine data $MN_...PAIRS[<axis pair>]
● Machine data $MN_...PAIRS[<axis pair>] is active
● Both machine axes of the axes pair have been referenced
If, at the time when the protection function is activated, the distance between the two machine
axes is shorter than the minimum distance for which parameters have been assigned, the
machine operator must retract the machine axes. Traversing motion towards each other is
prevented.
21.3.10

Axis-specific acceleration

The acceleration of one machine axis, braked using the function "axis pair collision protection"
when approaching the other axes of the axis pair, is set using:
MD63514 $MA_CC_PROTECT_ACCEL[<axis>] = <acceleration>
with <axis>: Machine axis name, e.g. AX1, AX2, ...
Note
Without jerk limitation
The acceleration set in MD63514 is always effective without jerk limitation.
750
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions