HEM4300 Engine Controller User Manual Page 14 of 55
4.7.2
POTENTIOMETER SPEED CONTROL
After setting manual speed control, select speed control type: 1: Potentiometer Speed Control
.
Parameter setting example:
Potentiometer speed control: 1: Enable;
Start resistance value: 50Ω;
Max. resistance value: 950Ω;
Potentiometer sensor channel: 1: Aux. Sensor 1;
Aux. sensor 1 curve: 1: Custom Resistance Curve;
Engine rated speed: 2000r/min;
Engine idle speed: 40.0% (800) r/min;
Speed upper limit: 2000r/min.
When it is applied, connect potentiometer to the input port of aux. sensor 1, the other one is
connected to sensor COM. The potentiometer start resistance value corresponds to engine idle speed,
max resistance value corresponds to engine speed control upper limit. Change the resistance value,
speed changes accordingly. The potentiometer resistance value is proportional to speed. Speed control
curve is as following:
Fig.3 Potentiometer Speed Control Curve
4.7.3
THROTTLE SPEED CONTROL
After setting manual speed control, select speed control type: 2: Throttle Speed Control
.
Parameter setting example:
Throttle speed control: 1: Enable;
Start voltage value: 0.75V;
Max. voltage value: 3.84V;
Throttle sensor channel: 1: Aux. Sensor 1;
Aux. sensor 1 curve: 3: Custom Voltage Curve;
Engine rated speed: 2000r/min;
Engine idle speed: 40.0% (800) r/min;
Speed upper limit: 2000r/min.
When it is applied, connect throttle sensor voltage signal port to input port of aux. sensor 1, sensor
supply port is connected to (+5V OUT) port, the other one is connected to sensor COM. Throttle start
voltage value corresponds to engine idle speed value, max. voltage value corresponds to speed upper
limit. Change the throttle voltage value, speed changes accordingly. The throttle voltage value is
