# Bit number for control of a DC brake (P-AXIS-00410)

P-AXIS-00410 | Bit number for control of a DC brake
Description | This parameter assists the control of a DC brake for spindles. A control bit that enables DC braking is transferred to the motor controller. The value of the parameter describes the bit number of the drive control word that is used for transmission. A value of 0 for P-AXIS-00410 means for example that bit zero (bit mask 0x0001) of the drive control word is used for transmission. A value of -1 for this parameter disables this function, i.e. no control bit for DC braking is transferred to the drive controller.

The control bit is 0 when:

- The axis accelerates to its target velocity (in either positive or negative direction).
- The axis reverses its movement direction (M3 -> M4, or M4 -> M3).

In all other cases the control bit is set.

The real control of the DC brake (e.g. monitoring of minimum velocities and magnetisation times) has to be implemented in the drive controller.

Parameter | antr.dc_brake_control_bit
Data type | SGN16
Data range | -1 ≤ dc_brake_control_bit ≤ 15
Axis types | S
Dimension |  | S: ----
Default value | -1
Drive types | Simulation, Profidrive
Remarks | DC brake control is only implemented for drive types Simulation and PROFIDRIVE.
Drive type P-AXIS-00020 | Valid values for P-AXIS-00410 (bit number)
4 (Simulation) | -1 , 0 .. 15
3 (Profidrive) | -1, 8, 9, 13, 15