Siemens SINUMERIK 840D sl Function Manual page 157

N... <status> <MaxDist>[0] ≙ X
710 1221
820 102121
Supplementary conditions
Axis status
All machine axes considered by CALCPOSI() must be homed.
Circle-related distance specifications
All circle-related distance specifications are always interpreted as radius specifications. This
must be taken into account particularly for transverse axes with activated diameter
programming (DIAMON/DIAM90).
Traversing distance reduction
If the specified traversing distance of an axis is limited, the traversing distance of the other
axes is also reduced proportionally in the <MaxDist> return value. The resulting end point is
therefore still on the specified path.
Rotary axes
Rotary axes are only monitored when they are not modulo rotary axes.
It is permissible that no software limit switches, working area limits or protection zones are
defined for one or more of the relevant axes.
Software limit switch and working area limitation status
Software limit switches and working area limits are only taken into account if they are active
during the execution of CALCPOSI(). The status can be influenced, for example, via:
● Machine data: MD21020 $MC_WORKAREA_WITH_TOOL_RADIUS
● Setting data: $AC_WORKAREA_CS_...
● NC/PLC interface signals DB31, ... DBX12.2 / 3
● Commands: GWALIMON/WALIMOF
Software limit switches and transformations
With CALCPOSI(), the positions of the machine axes (MCS) cannot always be clearly
determined from the positions of the geometry axes (WCS) during various kinematic
transformations (e.g. TRANSMIT) because of ambiguities at certain positions of the traversing
distance. In normal traversing operation, the uniqueness generally results from the history and
the condition that a continuous motion in the WCS must correspond to a continuous motion in
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
<MaxDist>[1] ≙ Y
0.000 21.213
18.000 18.000
A3: Axis Monitoring, Protection Zones
Remarks
Frame with translation and rotation active. The permissible
traversing distance in _MOVDIST applies in the shifted and
rotated WCS.
The software limit switch of the Y axis is violated. The calcu‐
lation of a further traversing direction is requested with _TES‐
TLIM = 17. This direction is in _MOVDIST (0.707, 0.0, 0.707).
It is valid because the hundred thousands digit is set in
_STATUS.
3.3 Protection zones
157