Siemens SINUMERIK 840D sl Function Manual page 744

Z3: NC/PLC interface signals
21.7 Clearance Control (TE1)
DB21, ...
DBX37.4-5
Signal state 0 or
edge change 1 → 0
Corresponding to ....
744
CLC motion has stopped
Clearance control generates traversing movements directly in the clearance-controlled axes.
As long as the axes are traversing due to clearance control, the axial interface signals cannot
be set:
DB31, ... DBX60.6/7 (position reached with exact stop coarse/fine)
DB3x DBX30.6/7 "Position reached, exact stop coarse/fine"
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions