Siemens SINUMERIK 840D sl Function Manual page 743

DB21, ...
DBX37.4
Edge evaluation: No
Signal state 1 or
edge change 0 → 1
Signal state 0 or
edge change 1 → 0
DB21, ...
DBX37.5
Edge evaluation: No
Signal state 1 or
edge change 0 → 1
Signal state 0 or
edge change 1 → 0
DB21, ...
DBX37.4-5
Edge evaluation: No
Signal state 1 or
edge change 0 → 1
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
CLC motion at lower motion limit
Signal(s) updated: Cyclic
The traversing movement of the clearance-controlled axes based on clearance control has
been stopped at the upper movement limit set in
MD62505 $MC_CLC_SENSOR_LOWER_LIMIT (Lower motion limit of clearance control)
or programmed with CLC_LIM(..).
Note:
The following signal is set at the same time:
DB21, ... DBX37.5 (CLC-stopped upper limit)
→ see above signal "CLC motion has stopped".
Clearance control has left the lower limitation.
CLC motion at upper motion limit
Signal(s) updated: Cyclic
The traversing movement of the clearance-controlled axes based on clearance control has
been stopped at the upper movement limit set in
MD62506 $MC_CLC_SENSOR_UPPER_LIMIT (Upper motion limit of clearance control)
or programmed with CLC_LIM(..).
Note:
The following signal is set at the same time:
DB21, ... DBX37.4 (CLC-stopped lower limit)
→ see above signal "CLC motion has stopped".
Clearance control has left the upper limitation.
CLC motion has stopped
Signal(s) updated: Cyclic
The traversing movement of the clearance-controlled axes based on clearance control is at a
standstill. The following conditions will set the signal:
The standstill conditions set in the following machine data are met:
MD62520 $MC_CLC_SENSOR_STOP_POS_TOL (positional tolerance for status message
"Clearance control zero speed")
MD62521 $MC_CLC_SENSOR_STOP_DWELL_TIME (wait time for status message
"Clearance control zero speed")
Programming of CLC_GAIN=0.0
PLC interface signal:
DB21, ... DBX1.4 (stop CLC motion)
Note:
The "CLC motion at standstill" signal is only set if bits 4 and 5 are set at the same time. If only
one of the two bits is set → see below.
Z3: NC/PLC interface signals
21.7 Clearance Control (TE1)
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