Siemens SINUMERIK 840D sl Function Manual page 514

TE3: Speed/torque coupling, master-slave
12.4 Torque compensatory controller
NOTICE
Mechanical coupling
When using the torque equalization controller, it is absolutely necessary to have a
mechanical coupling between the master and slave axis. Otherwise, the two drives involved
could accelerate in an uncontrollable fashion.
Activating/deactivating via the NC/PLC interface
The torque equalization controller can be activated on an axis-for-axis basis via the NC/PLC
interface:
DB31, ... DBX24.4 (torque equalization controller on)
Activating via the NC/PLC interface must be explicitly enabled:
MD37254 $MA_MS_TORQUE_CTRL_MODE[<slave axis>] = 1
The actual activation state can be read back via:
DB31, ... DBX96.4 (master/slave equalization controller active)
514
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions