Siemens SINUMERIK 840D sl Function Manual page 1259

● Writing of NC/PLC IS:
DB31, ... DBX16.0-16.2 (actual gear stage A to C)
by the PLC.
● After signal:
DB31, ... DBX16.3 (gear stage changed),
the last movement to be active is continued, if available.
For indirect encoders (motor encoders), the referencing status is cleared:
DB31, ... DBX60.4/5 = 0.
The spindle is in speed control mode and NC/PLC IS:
DB31, ... DBX84.7 (open-loop control mode)
is output.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
S1: Spindles
16.4 Configurable gear adaptation
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