Siemens SINUMERIK 840D sl Function Manual page 746

Z3: NC/PLC interface signals
21.8 Speed/Torque Coupling, Master-Slave (TE3)
DB31, ...
DBX96.3 Master/slave coarse
Edge evaluation: No
Signal state 1 or The differential speed is in the range defined by the following item of machine data:
edge change 0 → 1
MD37270 $MA_MS_VELO_TOL_COARSE
Signal state 0 or The differential speed has not reached the range defined in MD37270.
edge change 1 → 0
DB31, ...
DBX96.4 Master/slave compensatory cont. active
Edge evaluation: No
Signal state 1 or Torque compensatory control is active.
edge change 0 → 1
Signal state 0 or Torque compensatory control is not active.
edge change 1 → 0
The signal at the slave axis of a coupling is relevant.
DB31, ...
DBX96.7 Master/slave active
Edge evaluation: No
Signal state 1 or Master-slave coupling is active.
edge change 0 → 1
Signal state 0 or Master-slave coupling is not active.
edge change 1 → 0
The signal at the following axis of a coupling is relevant.
746
Signal(s) updated: Cyclic
Signal(s) updated: Cyclic
Signal(s) updated: Cyclic
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions