Siemens sinumerik 840D sl Function Manual page 629

Constraints
3.2 Speed/torque coupling (up to SW 5.x)
No further machine data need be set to activate a measurement.
Up to 4 signals can be recorded in one measurement. The associated machine axis is
selected in the axis selection for the torque values; for the controller output, the machine axis
of the slave axis of this control is selected.
Example:
Master axis: X1
Slave axis: Y1
The following is to be recorded:
Master torque, axis selection, X1.
Slave torque, axis selection, Y1.
Controller output, axis selection, Y1.
With 4 active couplings, it is possible to record all 4 torque values of the master axes or 4
controller outputs.
With automatic scaling, the measured curves of a display are always overlaid. In order to
compare the values of the curves properly, the scaling must be set the same for both curves
(see graphic 2 in the following figure). The scaling can still be modified in the Scale menu
after the measurement.
Figure 3-1
42
Example of a measurement with 4 measured values
Special functions: Speed/Torque Coupling, Master-Slave (TE3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0