Siemens SINUMERIK 828D Function Manual page 1294

S1: Spindles
16.4 Configurable gear adaptation
DB31, ... DBX16.3 (Gear changed).
In this case, it does not matter whether NC/PLC IS:
DB31, ... DBX18.5 (oscillation mode)
is still set.
The actual gear stage, which should correspond to the set gear stage, is relevant
for selecting the parameter set.
If this is not the case, then Alarm 22010 :
MD11410 $MN_SUPPRESS_ALARM_MASK, Bit 3 = 0
is output.
Following acknowledgment of gear stage change via the PLC
with NC/PLC IS:
DB31, ... DBX16.3 (Gear changed)
the spindle is in speed control mode (DB31, ... DBX84.7).
For further instructions on signal exchange between PLC and NC, see:
References:
Functions Manual - Basic Functions; Diverse NC/PLC Interface Signals and Functions (A2)
Second gear stage Data Set
The automatic gear stage change M40 can be extended by a second configurable gear stage data set.
The second gear stage data set is used exclusively in connection with tapping without compensation chuck
(G331, G332) so that an effective adjustment of spindle speed and motor torque can be achieved.
The activation is undertaken by setting the following bit for the master spindle:
MD35010 $MA_GEAR_STEP_CHANGE_ENABLE, Bit 5 = 1
The number of used gear stages of the two gear stage datasets is defined with the machine data:
MD35092 $MA_NUM_GEAR_STEPS2
The second gear stage block dataset is deactivated if:
MD35092 $MA_NUM_GEAR_STEPS2 = 0 (basic setting)
The first gear stage data set then selects the gear stage when M40 is active.
Note
The number of gear stages in the second data set can vary from the first. If no appropriate
gear stage is found for a programmed speed for M40, then no gear stage change is carried
out (exceptions, see "M40: Automatic gear stage selection for speeds outside the configured
switching thresholds [Page 1351]").
For more information about a typical program sequence in thread cutting without
compensating chuck G331/G332 see:
References:
Programming Manual - Fundamentals; Chapter: Motion commands
The gear stages 1 to 5 of the second gear stage dataset can be parameterized via the following machine data:
1294
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions