Detailed Description
2.1 General functionality
Basic logic functions: Travel to fixed stop (F1)
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Function Manual, 11/2006, 6FC5397-0BP10-2BA0
If no torque has been programmed in the block or since the start of the program, then the
value is valid in the axis-specific machine data:
MD37010 $MA_FIXED_STOP_TORQUE_DEF
(Default setting for clamping torque)
is entered.
Fixed stop reached
As soon as the axis comes into contact with the mechanical fixed stop (workpiece), the
closedloop control in the drive raises the torque so that the axis can move on. The torque
rises up to the programmed limit value and then remains constant.
The "Fixed point reached" status can be calculated as follows depending on the machine
data:
MD37040 $MA_FIXED_STOP_BY_SENSOR (fixed stop recognition by sensor)
:
•
FIXED_STOP_BY_SENSOR = 0
The "Fixed stop reached" status is achieved when the axial contour deviation (=
difference between actual and expected following error) has exceeded the value set in
machine data:
MD37030 $MA_FIXED_STOP_THRESHOLD (Threshold for fixed stop detection)
has exceeded.
•
FIXED_STOP_BY_SENSOR = 1
External sensor signals the NC via the PLC, with the NST DB31, ... DBX1.2 ("Sensor
fixed stop"), the state "Fixed stop reached".
•
FIXED_STOP_BY_SENSOR = 2
The "Fixed stop reached" status is active either when the status has been detected by the
contour monitoring function or when the external sensor signals this status by a signal
change from 0 " 1 to (DB31,...DBX 1.2).
The axis contour deviation is explained in:
References:
/FB1/ Function Manual Basic Function; Diagnostics tool (D1)
Internal processes
Once the NC has detected the "Fixed stop reached" status, it deletes the distancetogo and
the position setpoint is made to follow. The controller enabling command remains active.
Subsequently the PLC is through the NST DB31, ... DBX62.5 ("Fixed stop reached")
informed.
If the machine data:
MD37060 $MA_FIXED_STOP_ACKN_MASK
is set correspondingly, the acknowledgement of the PLC via the NST DB31 is, ... DBX1.1
("Acknowledge fixed stop reached") is waited for.
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 ...