Siemens SINUMERIK 840D sl Function Manual page 499

Figure 10-3
Activation
The setpoint is exchanged and the corresponding interface signals are evaluated in the PLC
user program.
Note
An existing PLC user program may need to be modified due to changes in the meaning of
interface signals in comparison with the technology card solution.
Only one of the machine axes with the appropriate logical drive number may have control via
the setpoint channel of the drive at any one time.
Requests to transfer drive control are sent using NC/PLC interface signal:
DB31, ... DBX24.5 (change setpoint output assignment)
The current status of drive control is displayed in the NC/PLC interface signal:
DB31, ... DBX96.5 (setpoint output assignment)
Access rights to the shared drive must be managed in the PLC user program.
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Setpoint exchange with 2 axes
S9: Setpoint exchange - 840D sl only
10.2 Startup
499