Siemens SINUMERIK 840D sl Function Manual page 99

Constraints
• The software limit switches refer to the machine coordinate system.
• The software limit switches must be inside the range of the hardware limit switches.
• The machine axis can be moved to the position of the active software limit switch.
• PRESET
• Endlessly rotating rotary axes
Effects
Automatic operating modes (AUTOMATIC, MDI)
• Without transformation, without overlaid movement, unchanged software limit switch:
• With transformation:
• With overlaid motion
Manual operating modes
• JOG without transformation
• JOG with transformation
Basic logic functions: Axis monitoring, protection zones (A3)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
After use of the function PRESET, the software limit-switch monitoring is no longer active.
The machine must first be re-referenced.
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
A part program block with a programmed traversing motion that would lead to
overrunning of the software limit switch is not started.
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.
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.
The machine axis stops at the software limit switch position.
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.
Detailed description
2.1 Axis monitoring
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