Siemens SINUMERIK 828D Function Manual page 97

• PRESET
After use of the function PRESET, the software limit-switch monitoring is no longer active. The machine must
first be re-referenced.
• Endlessly rotating rotary axes
No software limit-switch monitoring takes place for endlessly rotating rotary axes:
MD30310 $MA_ROT_IS_MODULO == 1 (Modulo conversion for rotary axis and spindle)
Exception: Setup-rotary axes
Effects
Automatic operating modes (AUTOMATIC, MDI)
• Without transformation, without overlaid movement, unchanged software limit switch:
A part program block with a programmed traversing motion that would lead to overrunning of the software limit
switch is not started.
• With transformation:
Different reactions occur depending on the transformation type:
- Behavior as above.
or
- The part program block with a programmed traversing motion that would lead to overrunning of the
software limit switch is started. The affected machine axis stops at the active software limit switch. The
other machine axes participating in the traversing motion are braked. The programmed contour is left
during this process.
• With overlaid motion
The part program block with a programmed traversing motion that would lead to overrunning of the software
limit switch is started. Machine axes that are traveling with overlaid motion or have traveled with overlaid
motion stop at the active software limit switch in question. The other machine axes participating in the
traversing motion are braked. The programmed contour is left during this process.
Manual operating modes
• JOG without transformation
The machine axis stops at the software limit switch position.
• JOG with transformation
The machine axis stops at the software limit switch position. Other machine axes participating in the
traversing motion are braked. The preset path is left during this process.
General
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
A3: Axis Monitoring, Protection Zones
2.2 Axis monitoring
97