Wesley BC-620-4CA - Manual (Page 40)

36 Curtis 1234/36/38 Manual,
OS
11
3 — PROGRAMMABLE PARAMETERS: Fine Tuning Parameters (TORQUE MODE)
2 – TORQUE MODE FINE TUNING MENU
ALLOWABLE
PARAMETER RANGE DESCRIPTION
Creep Torque 0–100 % Determines the amount of torque applied to the vehicle at a stop with
Creep_Torque_TrqM 0–32767 no throttle input, to emulate the feel of an automatic transmission
automobile; see Figure 8.
WARNING! When interlock is engaged,
creep torque allows vehicle propulsion if a direction is selected even
though no throttle is applied. Care should be taken when setting up
this parameter.
If pedal braking is enabled (see page 45), creep torque is
progressively disabled as brake is applied so as to prevent the motor
from driving into the brakes and thus wasting energy.
Brake Full Creep Cancel 25–100 % Determines the amount of brake pedal input that will fully cancel the .
Brake_Full_Creep_Cancel_TrqM 8192–32767 creep torque. Amount of cancellation is proportional to the brake input.
Creep Build Rate 0.1–5.0 sec Determines how fast the programmed creep torque builds when
Creep_Build_Rate_TrqM 100–5000 a direction is selected.
Creep Release Rate 0.1–5.0 sec Determines how fast the programmed creep torque releases when the
Creep_Release_Rate_TrqM 100–5000 brake is cancelling the creep torque or when the direction switches are
cleared (neutral).
Gear Soften 0–100 % Adjusts the throttle take-up from linear (0% setting) to an S curve.
Gear_Soften_TrqM 0–5000 Larger values create softer throttle take-up, in forward and reverse.
Softening is progressively reduced at higher speeds; see Figure 9.
Brake Taper Speed 200–6000 rpm Determines the motor speed below which the maximum braking current
Brake_Taper_Speed_TrqM 200–6000 is linearly reduced from 100% to 0% at zero speed; see Figure 10.
Setting the taper speed too low for the braking current will cause
oscillations in the motor as it attempts to brake the vehicle to a stop
on very steep slopes.
Taper speed is applicable only in response to brake pedal input; it
does not affect direction reversal braking or neutral braking.
Reversal Soften 0–100 % Larger values create a softer reversal from regen braking to drive
Reversal_Soften 0–3000 when near zero speed. This helps soften the transition when the regen
and drive current limits are set to different values.
Max Speed Decel 0.1–30.0 sec In some applications, the Max Speed value is changed frequently,
Max_Speed_Accel_TrqM 100–30000 through VCL or over the CAN bus. The Max Speed Accel parameter
controls the rate at which the maximum speed setpoint is allowed to
change when the value of Max Speed is lowered. The rate set by this
parameter is the time to ramp from Typical Max Speed rpm to 0 rpm.
For example, suppose you change Max Speed from 3000 rpm to
1000 rpm. If Typical Max Speed is 5000 rpm, and the rate is 5.0 sec-
onds, it will take 5.0 * (3000–1000) / 5000 = 2.0 seconds to ramp from
3000 rpm to 1000 rpm.