Simga2N Traction Advanced Manual– V1.3 Page 42 (166) ©2021 DMC GmbH Herten Germany
If controller is in torque mode the deceleration delay correspond to the time, when accelerator fully released
(direction selected and brake not pressed), for torque to decrease from 100 % to 0%.
If controller is in speed mode the deceleration delay correspond to the time, when accelerator fully released
(direction selected and brake not pressed), for speed to decrease from 100 % to 0% or from the active speed
limit to 0%, depending upon parameter “M2-13 Variable/Constant ramp time “CnRmpTm””.
! IMPORTANT this parameter affects the partial release of accelerator. If accelerator is fully released the neutral
braking related settings are active.
Important for speed control:
When speed control selected (“M2-1 Control Mode “Spd/Torq””=0) using a low value of ramp
time will bring bumpy response to accelerator release.
M1.1-3 Neutral brake torque “NBrake”
This parameter is active only in torque mode.
This sets the strength of the braking when the vehicle is in neutral, i.e. no drive signal in either direction and
no brake pressed. The setting is a percentage of maximum motor torque. The maximum motor torque is
defined by “Maximum motor current” (adjustable in “Menu 3 “Autotuning””), assumed to be 100% of torque.
M1.1-4 Neutral brake ramp time “NBrkRamp”
In Torque Control mode this sets the time taken to ramp from null braking torque demand to full braking torque
(100% of torque) when the vehicle enters neutral, i.e. no drive signal in either direction and no brake pressed.
Increasing the value gives a smoother but longer transition from drive to braking.
Example: if “Nbrake” is set to 10% and “NBrkRamp” is set to 10s the time to apply “Nbrake” torque is 1.0s.
In Speed Control mode this sets the time taken to ramp down the speed form 100% to zero (0%) or from the
active speed limit to 0% (depending on “M2-13 Variable/Constant ramp time “CnRmpTm””), when the vehicle
enters neutral, i.e. no drive signal in either direction. Increasing the value gives a smoother but longer transition
to zero speed.
Important for speed control:
When speed control selected (“M2-1 Control Mode “Spd/Torq”” = 0) using a very low value of
time will bring a very harsh neutral braking.
M1.1-5 Proportional direction brake ”PropDB”
This sets how the strength of the direction regenerative braking is controlled.
The behavior in direction braking also depends on the parameter “M2-1 Control Mode “Spd/Torq””:
Torque Control
• If set to 0 (Fixed), the braking strength is as set by the parameter “M1.1-6 Direction brake torque
“DBrake””, regardless of Accelerator potentiometer position.
• If set to 1 (Proportional), the braking strength depends on the Accelerator potentiometer position. At
the minimum Accelerator potentiometer position, the braking strength will be as set by the parameter
“M1.1-3 Neutral brake torque “NBrake””, while at the maximum Accelerator potentiometer position
the braking strength will be as set by the parameter “M1.1-6 Direction brake torque “DBrake””.
Between minimum and maximum, the braking strength is a value between the neutral and direction
braking settings, proportional to the Accelerator potentiometer position.
Speed Control
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