Geometry Axis In Rotated Frame And Axis Replacement - Siemens SINUMERIK 840D sl Function Manual

K5: Mode groups, channels, axis interchange
6.4 Axis/spindle replacement
6.4.13

Geometry axis in rotated frame and axis replacement

Replacement expansion via Frame with Rotation
In JOG mode, a geometry axis with rotated frame can be traversed as PLC axis or as a
command axis via static synchronized actions. In order to achieve this, in machine data
MD32074 $MA_FRAME_OR_CORRPOS_NOTALLOWED, bit 10=1 must be set. The
reposition behavior of this axis is influenced via Bit 11.
Note
Before changing operational mode during JOG mode
Before changing the operational mode from JOG mode, all traverse motions of all PLC and
command axes, which have been linked as geometry axes in the rotated frame, must have
been concluded. These axes must at least have become neutral axes again, otherwise alarm
16908 will be generated when the operational mode is changed. This alarm is also
generated when only a single geometry axis is traversed as a PLC or command axis in the
rotated coordinate system.
Such an axis can only become a PLC or command axis within the channel, an axis
replacement in another channel is not allowed.
Prerequisite for changing from JOG to AUTOMATIC
When changing from JOG mode to AUTOMATIC, the Condition program is interrupted and
the end point of this geometry axis motion is only taken over if in MD 32074:
FRAME_OR_CORRPOS_NOTALLOWED bit 11=1. This positions the PLC or command
axes in relation to the rotation of the frame.
All axes influenced by a rotating frame are considered as geometry axes grouping and are
handled collectively. In this way, all axes of the
● assigned to the NC program or
● all axes are neutral or
● are active as main run axes (PLC, command, or oscillation axis).
For example, if one axis is programmed with a WAITP, waiting is performed for all further
axes of the geometry axis grouping, so that these axes can collectively become neutral axes.
If one of the axes becomes a PLC axis in the main run, then all other axes of this grouping
become neutral axes.
Boundary conditions
If in MD32074 $MA_FRAME_OR_CORRPOS_NOTALLOWED bit 10=0 and in NC program
ROT Z45 is programmed, then no axis replacement is possible for the X axis and the Y axis.
Similarly this applies to the Z axis, for instance with ROT X45 or ROT Y45 and also during
JOG mode, when a block with such programming is interrupted. In this case, however, the
signals for the X axis and the Y axis are at the VDI interface
IS DB31, ...DBX68.5 ("Replacement possible") = 1
IS DB32, ...DBX68.5 ("Replacement possible") = 1,
but both signals are reset to 0.
488
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions