Siemens sinumerik 840D sl Function Manual page 530

Input signals
The clearance sensor input signals parameterized above:
• 840D: "Parameter settings for input signals (840D)" chapter
• 840Di: "Parameter settings for input signals (840Di)" chapter
are declared to the clearance control function via the following machine data:
• MD62502 $MN_CLC_ANALOG_IN = x (analog input for clearance control)
• MD62504 $MN_CLC_SENSOR_TOUCHED_INPUT = x (assignment of the input bit for
Exact stop
In order to be able to meet a programmed "Exact stop coarse/fine reached" block change
condition (G601/G602), the traversing velocity induced by the clearance control function in
the clearance-controlled axes must be lower than the standstill velocity tolerance at least for
the duration of the standstill delay time.
The following machine data must be modified to optimize the block change time:
• MD36000 $MA_STOP_LIMIT_COARSE[x] (exact stop coarse)
• MD36010 $MA_STOP_LIMIT_FINE[x] (exact stop fine)
• MD36020 $MA_POSITIONING_TIME [x] (delay time exact stop fine)
• MD36040 $MA_STANDSTILL_DELAY_TIME[x] (standstill monitoring time delay)
• MD36060 $MA_STANDSTILL_VELO_TOL[x] (high velocity/ speed "axis/ spindle
Complete parameterization
Set the remaining clearance control parameters in accordance with the data and signal
descriptions in the sections of the same name.
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
x =input number, as when addressing system variables $A_INA[x]
the "sensor collision" signal)
x =input number, as when addressing system variables $A_IN[x]
stopped")
x = Axis number of clearance-controlled machine axis
Detailed description
2.5 Startup
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