Clearance Control (Te1); Signals To Channel (Db21; Signals From Channel (Db21 - Siemens SINUMERIK 840D sl Function Manual

Z3: NC/PLC interface signals

21.7 Clearance Control (TE1)

21.7 Clearance Control (TE1)
21.7.1

Signals to channel (DB21, ...)

DB21, ...
DBX1.4
Edge evaluation: No
Signal state 1 or
edge change 0 → 1
Signal state 0 or
edge change 1 → 0
DB21, ...
DBX1.5
Edge evaluation: no
Signal state 1 or
edge change 0 → 1
Signal state 0 or
edge change 1 → 0
Application example
Corresponding to ....
21.7.2

Signals from channel (DB21, ...)

DB21, ...
DBX37.3
Edge evaluation: No
Signal state 1 or
edge change 0 → 1
Signal state 0 or
edge change 1 → 0
742
CLC stop
Signal(s) updated: Cyclic
Clearance control is deactivated in the same way as the part program command
CLC_GAIN=0.0.
Clearance control is enabled.
CLC_Override
Signal(s) updated: Cyclic
The channel-specific override DB21, ... DBB4 (feed rate override) also applies to the
clearance control
Override settings < 100% reduce corresponding to the velocity limitation for the overriding
motion, as defined in the following machine data:
MD62516 $MC_CLC_SENSOR_VELO_LIMIT (velocity of clearance control motion)
Override settings > 100% apply the limitation from the machine data.
The maximum velocity of the control motion is not dependent on the override setting
The difference for the operator is particularly dependent on whether the sensor motion is
stopped or not with a 0 override.
channel-specific override settings:
DB21, ... DBB4 (feed rate override)
DB21, ... DBX6.7 (feed rate override active)
CLC is active
Signal(s) updated: Cyclic
Clearance control is activated.
Clearance control is deactivated.
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions