Configuring SW900 Ebike Display

How to configure parameters on the SW900 electric bike display.

Menu Operation

Press UP + DOWN buttons to enter configuration menu. Parameter PXX, beginning with P01, will show on screen in the SPEED section. Parameter value will show in the bottom right of the display, in the ODO section.

Use Up and DOWN buttons to change value of parameter.

Short press M button to select next parameter.

Long press M button to save current parameter.

When in configuration menu, press UP + DOWN to save parameters and exit configuration menu.

After 10 seconds of inactivity, configuration will automatically be saved and exited.


P01 Backlight Brightness
1-3, Higher is brighter.
Brightness of the display in low light (night).

P02 Unit of Measurement
0 for Kilometers, 1 for Miles
Sets the displayed unit of measurement for odometer and speed.

P03 Battery/Controller Voltage
24/36/48 volts.
Sets battery voltage. This should match the output of your battery. Used to calibrate battery level indicator.

P04 Inactivity Timeout
0-60 minutes, 0 disables inactivity timeout.
Automatically sets display/controller to sleep after a given time of inactivity.

P05 PAS Levels
0 or 1
0 = 3 Levels, 1 = 5 Levels

Sets of the number of Pedal Assist System (PAS) levels available. More levels = finer control over amount of assistance given by the motor.

P06 Wheel Size
Diameter In Inches, Precision 0.1
Sets the wheel size of the bicycle in inches. Correct wheel size is required for accurate speed and odometer function.

P07 Motor Speed Magnet Type
Set to 47 for direct drive motor, 86 for geared motor

P08 Speed Limiter
0-100 km/h, 100 for unlimited
Shuts off motor when using PAS and above set speed limit. This parameter's value is always in km/h, so a mph limit must first be converted to km/h first!

P09 Throttle Response
0 for instant throttle, 1 for delayed throttle
Sets whether pressing throttle and motor beginning to spin is instant, or whether there is a delay between the actions.

P10 Throttle Mode
0 = PAS Only, 1 = Throttle Only, 2 = Both PAS and Throttle
Sets which sensors are used for throttle control.

P11 PAS Sensitivity
1-24, Higher = more sensitive
Sets how sensitive PAS is to movement of the pedals.

P12 PAS Start Strength
0-5, Higher = more assistance
Amount of assistance given when you start pedalling.

P13 PAS Magnet Type
5, 8, 12. Determined by magnets (dots) on PAS ring.
Sets PAS ring magnet type as determined by the number of magnets on the ring.

P14 Controller Current Limit
1-20 Amps, some versions of sw900/controller allow higher values.
Sets the current (amp) limit of your controller. Setting this value to something higher than your controller or motor can handle may cause damage!

P15 Not Implemented
This parameter is unused

P16 Odometer (ODO) Reset
Press and hold UP button for 5 seconds to reset ODO counter to zero.
Some versions of SW900 do not contain this parameter.

P17 Motor Wattage/Display Option
250-1000 Watts
Some versions of SW900 use this parameter to switch between displaying battery voltage and wattage.
Sets the wattage of the motor. Some versions of SW900 do not contain this parameter.

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