Siemens SINUMERIK 840D sl Commissioning Manual page 186

NCK start-up
10.6 Parameterization of spindle data
DB number Bit, byte
31, ... 83.2
31, ... 83.1
31, ... 83.0
31, ... 84.7
31, ... 84.6
31, ... 84.5
31, ... 84.3
31, ... 86 and 87
31, ... 88-91
186
Name
Setpoint speed increased
Setpoint speed limited
Speed limit exceeded
Active spindle control mode
Active spindle mode oscillation mode
Active spindle positioning mode
Rigid tapping active
M function for spindle
S function for spindle
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
Reference
IBN CNC: NCK, PLC, drive