Curtis 1239E - Page 64

4 — PROGRAMMABLE PARAMETERS
Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
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MOTOR: FIELD WEAKENING CONTROL MENU, cont’d
PARAMETER ALLOWABLE RANGE DESCRIPTION
Weakening Rate Drive
Field_Weakening_Rate_Drive
0x383C 0x00
0 – 100%
0 – 500
Sets the control loop gains for eld weakening. Setting the rate too low may
create surging in the vehicle as it accelerates at mid to high speeds. Setting
the rate too high may create high frequency oscillations (usually audible)
when the vehicle accelerates at mid to high speeds.
Min Field Current
Min_Field_Current
0x3821 0x00
0 – 800 A
0 – 8000
Sets the eld current when no torque is requested from the motor. This
current pre-uxes the motor and can improve initial take-off at the expense of
some battery consumption.
Swap Two Phases
Swap_Two_Phases_OptionBits3
[Bit 3]
0x306C 0x00
On / Off
On / Off
[PCF]
If, after Swap Encoder Direction has been set correctly, the vehicle drives in
the wrong direction (i.e., drives forward when in reverse, and vice versa), try
changing the setting of the Swap Two Phases parameter.
This parameter has the same effect as physically swapping the cables on any
two of the three motor phase connections.
Positive motor speed must be in the forward direction in order for the
emergency reverse feature to operate properly.
NOTE: Do not change this parameter while the controller is powering the
motor. Any time this parameter is changed a Parameter Change Fault (fault
code 49) is set and must be cleared by cycling power; this protects the
controller and the operator.
Adjusting this parameter can be hazardous. For instructions, see Chapter
7, Step 12.
Swap Feedback Direction
Swap_Feedback_Direction
OptionBits3 [Bit 0]
0x306C 0x00
On / Off
On / Off
[PCF]
Changes the motor encoder's effective direction of rotation. The encoder
provides data used to calculate motor position and speed. This parameter
must be set such that when the motor is turning forward, the controller
reports back a positive motor speed.
Positive motor speed must be in the forward direction in order for the
emergency reverse feature to operate properly.
Note: Do not change this parameter while the controller is powering the motor.
Any time this parameter is changed a Parameter Change Fault (fault code 49)
is set and must be cleared by cycling power; this protects the controller and
the operator.
Adjusting this parameter can be hazardous. For instructions, see Chapter 7,
Step 10.
Motor Type
IM_Motor_Type
0x3809 0x00
0 – 504
0 – 504
[PCF]
This parameter references a predened table of motor parameters for many
AC induction motors.
Motor Type 0 is reserved for using the auto-characterization procedure in
Chapter 8A.
NOTE: Changing this parameter requires the re-setting of the FW Base
Speed parameter. Other parameters may also need to be reset or evaluated
by following the Initial Setup and Tuning Guide chapters instructions.
Consult the Curtis distributor or support engineer for information how to set
this parameter based on the application and motor.
WARNING
WARNING