Siemens sinumerik 840D sl Function Manual page 624

Constraints
NCU 572.2
The Master/Slave for Drives function can be utilized on NCU 572.2 hardware only on
condition that is has been specifically enabled for the customer.
SINUMERIK 840Di
The compile cycles function of the SINUMERIK 840D are currently available only on request
for the SINUMERIK 840Di.
Virtual axis
In connection with "master-slave", the use of the function "Virtual axis" is not permissible in
the following machine data:
MD30132 $MA_IS_VIRTUAL_AX (axis is virtual axis)
Special functions: Speed/Torque Coupling, Master-Slave (TE3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
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