4 — PROGRAMMABLE PARAMETERS
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017 Return to TOC
pg. 40
2 - TORQUE MODE — RESPONSE MENU
PARAMETER ALLOWABLE RANGE DESCRIPTION
Accel Rate
Accel_Rate_TrqM
0x3026 0x00
0.1 – 30.0 s
100 – 30000
Sets the rate (in seconds) at which the motor torque increases to full when
full throttle is applied. Larger values represent slower response.
Accel Release Rate
Accel_Release_Rate_TrqM
0x3028 0x00
0.1 – 2.0 s
100 – 2000
Determines how quickly deceleration will be initiated when the throttle
is released while the vehicle is still accelerating. If the release rate
is fast (i.e., set to a low value), the transition is initiated abruptly. The
transition is smoother if the release rate is set to a higher value (slower
transition); however, setting the rate too high can cause the vehicle to feel
uncontrollable when the throttle is released, as it will continue to drive for
a short time.
Brake Rate
Brake_Rate_TrqM
0x3029 0x00
0.1 – 5.0 s
100 – 5000
Adjusts the rate (in seconds) at which braking torque builds as the vehicle
transitions from drive to braking when direction is reversed, the brake
pedal is applied, or neutral braking begins. Lower values represent faster
times and therefore faster braking; gentler braking is achieved by setting
the braking rate to a higher value.
Brake Release Rate
Brake_Release_Rate_TrqM
0x3831 0x00
0.1 – 2.0 s
100 – 2000
Adjusts the rate (in seconds) at which braking torque releases as as the
vehicle transitions from braking to drive.
Neutral Braking
Neutral_Braking_TrqM
0x302E 0x00
0 – 100%
0 – 32767
Neutral braking occurs progressively when the throttle is reduced toward
the neutral position or when no direction is selected. The neutral braking
parameter is adjustable from 0 to 100% of the regen current limit (see
Current Limits menu, page 43).
Neutral Taper Speed
Neutral_Taper_Speed_TrqM
0x302F 0x00
200 – 6000 rpm
200 – 6000
Determines the motor speed below which neutral braking current is
adjusted when throttle is reduced; see Figure 9.
The neutral braking current is linearly reduced by the product of the
parameters, Neutral Braking x Regen Current Limit, at the Neutral Taper
Speed to the Creep Torque current at zero rpm motor speed.
NOTE: Setting the taper speed too low may cause oscillations in the motor.
Forward Full Restraint Speed
Forward_Full_Restraint_Speed _TrqM
0x386D 0x00
100 – 32000 rpm
100 – 32000
Sets the speed point at which the full regen current will be applied to
restrain the vehicle from rolling forward. Although this speed is never
actually reached, it does set the slope of the restraint strength and can
be thought of as a gain; see Figure 9. Setting this parameter too low can
cause oscillations.
Back Full Restraint Speed
Back_Full_Restraint_Speed_TrqM _TrqM
0x386E 0x00
100 – 32000 rpm
100 – 32000
Sets the speed point at which the full regen current will be applied to
restrain the vehicle from rolling in reverse (backward). Although this speed
is never actually reached, it does set the slope of the restraint strength and
can be thought of as a gain; see Figure 9. Setting this parameter too low
can cause oscillations.
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