4 — PROGRAMMABLE PARAMETERS
pg. 39
Return to TOC Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017
1- SPEED MODE — PUMP PARAMETERS
PARAMETER ALLOWABLE RANGE DESCRIPTION
Pump Enable*
|AC_Pump_Enable_SpdM
|AC_Pump_Enable_SpdM_Bit0 [Bit 0]
0x3896 0x00
On / Off
On / Off
This parameter should be programmed On to operate a pump motor
rather than a vehicle drive motor. Speed controller responsiveness and
stability are enhanced.
Regen Lower Enable*
Regen_Lower_Enable_SpdM
Regen_Lower_Enable_SpdM_Bit0
[Bit 0]
0x3877 0x00
On / Off
On / Off
This parameter works together with Pump Enable as follows:
1) When Pump Enable = On and Regen Lower Enable = On, the pump
motor can turn in both the forward and the reverse direction. In this
case, the pump can be used as the Lower function (reverse). The
pump motor, when “driven in reverse by a load” will also regen current
in a similar fashion to a drive-motor regenerative braking.
2) When Pump Enable = On and Regen Lower Enable = Off, the pump
motor can turn only in the forward direction. In this case, a hydraulic
valve is typically used for the Lower function.
3) When Pump Enable = Off, the Regen Lower Enable parameter has no
effect on the control system.
* This parameter appears twice in the parameter menu structure. Changing the value of this parameter affects the same parameter in Speed Mode
Express.
2 – TORQUE MODE — SPEED LIMITER MENU
PARAMETER ALLOWABLE RANGE DESCRIPTION
Max Speed
Max_Speed_TrqM
0x3021 0x00
500 – 8000 rpm
500 – 8000
Denes the maximum allowed motor rpm for torque control mode
(independent of throttle position). In torque control mode, full throttle
requests 100% of the available torque. Partially-applied throttle is scaled
proportionately; e.g., 40% applied throttle corresponds to a request for 40%
of the available torque.
NOTE: The maximum motor rpm is subject to the constraints on page 24.
Kp
Kp_TrqM
0x3023 0x00
0 – 100%
0 – 8192
Determines how aggressively the speed controller attempts to limit the speed
of the motor to Max Speed. Larger values provide tighter control.
If Kp is set too high, you may experience oscillations as the controller tries to
control speed. Setting Kp too low may result in a top speed much higher than
Max Speed.
Ki
Ki_TrqM
0x3025 0x00
5 – 100%
50 – 1000
The integral term (Ki) forces zero steady state error, so the motor speed will
be limited to Max Speed. Larger values provide faster control.
If the gain is set too high, you may experience oscillations as the controller
tries to limit speed. If it is set too low, it may take a long time for the motor to
approach Max Speed from overspeed.
Kd
Kd_TrqM
0x3836 0x00
0 – 100%
0 – 8192
Provides damping as the vehicle approaches top speed, thereby reducing
overshoot. If Kd is set too high, the vehicle may take too long to reach top
speed. If Kd is set too low, the vehicle may overshoot top speed, especially
when traveling downhill.
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