Detailed Description
2.1 General functionality
Basic logic functions: Travel to fixed stop (F1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
13
Sequence in case of a fault or abnormal termination
The NST DB31, ... DBX62.4 ("Activate travel to fixed stop") is reset.
Depending on the machine data:
MD37060 $MA_FIXED_STOP_ACKN_MASK
the acknowledgement of the PLC is awaited through resetting of the NST
DB 31, ... DBX3.1 ("Enable travel to fixed stop") is waited for.
The torque limitation is then canceled and a block change executed.
Deselection
The NC recognizes the function deselection via programming of the command
FXS[x]=0
.
Then an advance stop (
STOPRE
) is internally released, since it can't be forseen where the
axis will be after deselection.
The torque limitation and monitoring of the fixed stop monitoring window are canceled.
The NST DB31, ... DBX62.4 ("Activate travel to fixed stop") and DB31, ... DBX62.5 ("Fixed
stop reached") are reset.
Depending on the machine data:
MD37060 $MA_FIXED_STOP_ACKN_MASK
the acknowledgement of the PLC is awaited through resetting of the NST
DB 31, ... DBX3.1 ("Enable travel to fixed stop").and/or
DB 31, ... DBX1.1 ("Acknowledge fixed stop reached") is waited for.
The axis will then change to position control. The followup mode of the position setpoints is
ended and a synchronization to the new actual position is carried out.
A programmed traverse motion can then be executed. This motion must lead away from the
fixed stop or else the stop or even the machine may sustain damage.
A block change is executed after the target position has been reached.
Multiple selection
A selection may only be carried out once. If the function is called once more due to faulty
programming (
FXS[Axis]=1
) the alarm 20092 "Travel to fixed stop still active" is initiated.
Blockrelated synchronized actions
By programming a blockrelated synchronized action, travel to fixed stop can be connected
during an approach motion.
Programming example:
N10 G0 G90 X0 Y0
N20 WHEN $AA_IW[X]>17 DO FXS[X]=1
; If X reaches a position greater
N30 G1 F200 X100 Y110
; 17mm FXS is activated
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 ...