Simga2N Traction Advanced Manual– V1.3 Page 58 (166) ©2021 DMC GmbH Herten Germany
M1.4-4 Double PI speed threshold “SpdPITh”
This parameter sets the speed threshold for speed control to move from low speed PI gains to high speed PI
gains
M1.4-5 Proportional gain speed controller below threshold “KpSpdLow”
This parameter has the same meaning of “Proportional gain speed controller”. This is applied if “Enable double
PI gains for speed controller” is set to 1 and actual speed is above “Double PI speed threshold”.
M1.4-6 Integral gain speed controller below threshold “KiSpdLow”
This parameter has the same meaning of “Integral gain speed controller”. This is applied if “Enable double PI
gains for speed controller” is set to 1 and actual speed is above “Double PI speed threshold”.
M1.4-7 Transition time between the double PI regulators for speed controller “TransTim”
This parameter sets the time is needed for moving from low-speed gains to high-speed gains and vice versa. A
too small value can produce a bumpy transition.
Parameters for “smooth speed limiting” function
A second speed limiting function is available..
The new speed limiting feature is active in both speed and torque mode with different effects, with the goal to keep the
drive feeling of the vehicle more comfortable and avoid bumps caused by rough ground conditions.
M1.4-8 Speed limit tolerance “SpLimTol”
This parameter is active in both speed and torque mode for traction control. It is not active for pump control.
It sets the error tolerance in % around a speed limitation. It is defined as:
, thus setting this
parameter to 0% would deactivate the function.
Example: if “SpLimTol” is set to 10% and the active speed limit is 100 Hz, the speed will be allowed to vary in
range of 90-110 Hz.
To have a smooth speed limitation without overshoot it is suggested to set this parameter between 5% and
15%. Too large values will allow a very smooth action but the speed variation around the limit may be very
large. Too small values will give a tighter speed limitation but it may result more aggressive and bumpy.
! VERY IMPORTANT When “Speed tolerance” is activated in torque mode the PI speed controller adjustment
M1-4.1,2 and M1.4-5,6 are totally disabled for limiting the speed. The speed limitation won’t be fully accurate
and the speed limit value will be “held” with the Speed Limit tolerance value.
In speed mode this function allows to avoid continuous adjustment of current while driving on flat ground with
vehicle unloaded at speed limit, thus reducing the heating up of motor and controller. In speed mode the M1.4-
8 Speed limit tolerance “SpLimTol” is acting on the Drive torque limit as indicate in the following figure.
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