Siemens SINUMERIK 840D Function Manual page 796

S1: Spindles
18.4 Configurable gear adaptations
Status feedback signals
● DB31, ... DBX84.6 == 1 (oscillation mode)
● DB31, ... DBX82.3 == 1 (changeover gear stage)
● DB31, ... DBX82.0 - 2 == <set gear stage>
● DB31, ... DBX61.5 == 0 (position controller active)
The load gear can now "disengage".
Start oscillation
The PLC user program can now set the oscillation enable signal.
● DB31, ... DBX18.5 = 1 (oscillation enable)
The motor accelerates with the oscillation acceleration to the oscillation speed in the start
direction for the direction of rotation dependent oscillation time:
● MD35410 $MA_SPIND_OSCILL_ACCEL (acceleration when oscillating)
● MD35430 $MA_SPIND_OSCILL_START_DIR (start direction when oscillating)
● MD35400 $MA_SPIND_OSCILL_DES_VELO (oscillation speed)
● MD35450 $MA_SPIND_OSCILL_TIME_CCW (oscillation time for the M4 direction)
● MD35440 $MA_SPIND_OSCILL_TIME_CW (oscillation time for the M3 direction)
Reversing the direction of rotation
After the direction-dependent oscillation time has expired, the motor is braked with the
oscillation deceleration and is accelerated in the opposite direction of rotation to the oscillation
speed for the other oscillation time.
Oscillation controlled by the PLC
Requirement
● DB31, ... DBX18.4 = 1 (oscillation controlled by the PLC)
● DB31, ... DBX18.5 = 1 (oscillation enable)
Status feedback signals
● DB31, ... DBX84.6 == 1 (oscillation mode)
● DB31, ... DBX82.3 == 1 (changeover gear stage)
● DB31, ... DBX82.0 - 2 == <set gear stage>
● DB31, ... DBX61.5 == 0 (position controller active)
The load gear can now "disengage".
Start oscillation
The PLC user program can now set the oscillation enable signal:
● DB31, ... DBX18.7 = 1 (setpoint direction of rotation, counterclockwise) or DB31, ...
DBX18.6 = 1 (setpoint direction of rotation, clockwise)
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Axes and spindles
Function Manual, 06/2019, A5E47437747B AA