Detailed description
2.1 Axis monitoring
Basic logic functions: Axis monitoring, protection zones (A3)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
31
Zero-mark monitoring
PROFIBUS drives with incremental encoders
Zero-mark monitoring is performed by the drive software.
PROFIBUS drives with absolute encoders
The drive software performs the monitoring function, while the plausibility check is carried
out in the NCK (as for SIMODRIVE 611D systems).
2.1.7
Limit switches-monitoring
Overview of the end stops and possible limit switch monitoring:
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2.1.7.1
Hardware limit switches
Function
A hardware limit switch is normally installed at the end of the traversing range of a machine
axis. It serves to protect against accidental overtravelling of the maximum traversing range of
the machine axis while the machine axis is not yet referenced.
If the hardware limit switch is triggered, the PLC user program created by the machine
manufacturer sets the corresponding interface signal:
DB 31, ... DBX12.0 / 12.1 = 1 (Hardware limit switch minus / plus)
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...