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Curtis 1298 Manual, OS 11
3 — PROGRAMMABLE PARAMETERS: Speed Controller Parameters (SPEED MODE EXPRESS)
0 – SPEED MODE EXPRESS SPEED MODE EXPRESS MENU
ALLOWABLE
PARAMETER RANGE DESCRIPTION
Max Speed 100–8000 rpm Defines the maximum requested motor rpm at full throttle. Partially-
Max_Speed_SpdMx 100–8000 applied throttle is scaled proportionately; e.g., 40% applied throttle
corresponds to a request for 40% of the set Max Speed Value.
Note: The maximum motor rpm is subject to the constraints on page 25.
Kp 0–100 % Determines how aggressively the speed controller attempts to match
Kp_SpdMx 0–8192 the speed of the motor to the commanded speed. Larger values provide
tighter control.
If the gain is set too high, you may experience oscillations as the
controller tries to control speed. If it is set too low, the motor may behave
sluggishly and be difficult to control.
Ki 5–100 % The integral term (Ki) forces zero steady state error, so the motor
Ki_SpdMx 50–1000 will run at exactly the commanded speed. Larger values provide tighter
control.
If the gain is set too high, you may experience oscillations as the
controller tries to control speed. If it is set too low, the motor may take
a long time to approach the exact commanded speed.
Accel Rate 0.1–30.0 sec. Sets the rate (in seconds) at which the speed command increases
Accel_Rate_SpdMx 100–30000 when throttle is applied. Larger values represent slower response.
Decel Rate 0.1–30.0 sec. Sets the rate (in seconds) that is used to slow down the vehicle when
Decel_Rate_SpdMx 100–30000 the throttle is reduced. Larger values represent slower response.
Brake Rate 0.1–30.0 sec. Sets the rate (in seconds) at which the vehicle slows down when throttle
Brake_Rate_SpdMx 100–30000 is applied in the opposite direction. Larger values represent slower
response.
Pump Enable On/Off This parameter should be programmed On to operate a pump motor
AC_Pump_Enable_SpdM
On/Off rather than a vehicle drive motor. Speed controller responsiveness and
AC_Pump_Enable_SpdM_Bit0 [Bit 0] stability are enhanced, and the motor is allowed to turn only in the forward
direction.
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