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  • paxtana
    started a topic 750c Display Documentation

    750c Display Documentation

    https://lunacycle.com/luna-750c-full...dhd-and-bbs02/


    This covers the basics of the 750C display.
    • 3.2 inch High-contrast IPS colorful dot screen.
    • CAN-BUS Communication Protocol.
    • Password control
    • Speed display: RT SPEED,MAX SPEED,AVG SPEED
    • KM / Mile: Setting up adjustable
    • Mileage : ODO,Trip,Time.Range.
    • Clock. (note: internal battery needs a long charge before keeping time, see below)
    • Power indicator.
    • Error codes and built in diagnostics
    • Software Update capability
    • 48V/52V Bafang mid drive motor compatible
    • Rain proof, but not fully waterproof


    Common questions:
    Password for advanced settings: 1199
    Throttle is tied to selected PAS level no more full throttle in lower PAS modes
    How do I access the display settings, basic settings and advanced settings?
    2 quick pushes of the M button
    Walk mode for going up stairs?
    Hold down “-”
    Night mode?
    Hold down “+”
    Reset Odometer?
    Hold down both “+/ -”
    Error codes
    Error Code Error description Error display 750c
    0x01 Normal No error
    0x03 Brake signal No error
    0x04 Throttle on high position show 04H
    0x05 Throttle error show 05H
    0x06 Low voltage protection show 06H
    0x07 High voltage protection show 07H
    0x08 Motor’s hall sensor error show 08H
    0x09 Phase line of motor error show 09H
    0x10 Controller over temperature show 10H
    0x11 Motor over temperature show 11H
    0x12 Current sensor error show 12H
    0x13 Battery’s temperature sensor error show 13H
    0x14 Motor‘s temperature sensor error show 14H
    0x15 Speedo sensor issue show 15H
    0x21 unknown show 21H
    0x22 BMS communication error show 22H
    0x23 Head light error show 23H
    0x24 Head light sensor error show 24H
    0x25 Torque sensor error-Torque show 25H
    0x26 Torque sensor error-speed show 26H
    0x30 Communication error show 30H
    Settings:

    Display Settings
    • System - Metric or Imperial (imperial changes to MPH on main display screen but not on the speed limit setting in advanced setting, it stays on kmph)
    • Brightness - 1 thru 5
    • Auto Off - 1 thru 9 minutes or OFF
    • Scenes - Analog or Digital (doesn't seem to change anything)
    • Battery Indication - Percent, Voltage or OFF
    • Clock - Date and Time Settings


    Basic Settings
    • Wheel Size - 16, 18, 20, 22, 24, 26, 27, 27.5, 28, 29, 30, 31
    • Battery - 24v, 36v, 48v, 52v


    Advanced Settings (access with password 1199)
    • Speed Limit - Has no effect on throttle or PAS
    • Current Limit - Has no effect on throttle or PAS
    • Poles In Motor - Has no effect on throttle or PAS
    • Start After Poles - Has no effect on throttle or PAS
    • Clockwise Start - No effect on throttle or PAS
    • Throttle 6km - No effect on throttle or PAS
    • Throttle - Ties throttle to level of PAS (variable throttle)
    • Start Mode - Has no effect on throttle or PAS
    • Assist Levels - Levels of assist 5, 9 or (UBE?)
    • Key Anti jam- Seems to have no effect

    Clock keeping time when off:
    Thanks to forum members in this thread for figuring out solution to this. Battery needs a long charge before it will have enough charge to keep time when off, so turn off auto shutoff and leave it on long enough for internal batt to get a good charge. See this part of the thread below for details


    Basic video walkthrough

  • paxtana
    replied
    That's probably for the best, the display cannot do current limiting anyway, you need to do that with the program cable.
    https://electricbike.com/forum/forum...shd-mid-drives

    Leave a comment:


  • prh88
    replied
    The beginning of this thread has a picture of the Advance Settings screens. Starts with Speed limit, followed by Current Limit and so forth. My screen starts with Speed Limit, but next item is Assist levels. It does not show the Current Limit nor the so forth. Any suggestions?
    This is pic from the beginning of this documentation thread This is pic of my display in Advance Setting.  Where is Current Limit and so forth?

    Leave a comment:


  • rkives
    replied
    The 750C I recently received (amazon) required the password 1919 to access advance settings.

    Leave a comment:


  • fatfoldingebike-bc
    replied
    Originally posted by paxtana View Post


    [TABLE]
    Error codes
    Error Code Error description Error display 750c
    0x01 Normal No error
    0x03 Brake signal No error
    0x04 Throttle on high position show 04H
    0x05 Throttle error show 05H
    0x06 Low voltage protection show 06H
    0x07 High voltage protection show 07H
    0x08 Motor’s hall sensor error show 08H
    0x09 Phase line of motor error show 09H
    0x10 Controller over temperature show 10H
    0x11 Motor over temperature show 11H
    0x12 Current sensor error show 12H
    0x13 Battery’s temperature sensor error show 13H
    0x14 Motor‘s temperature sensor error show 14H
    0x15 Speedo sensor issue show 15H
    0x21 unknown show 21H
    0x22 BMS communication error show 22H
    0x23 Head light error show 23H
    0x24 Head light sensor error show 24H
    0x25 Torque sensor error-Torque show 25H
    0x26 Torque sensor error-speed show 26H
    0x30 Communication error show 30H
    I purchased the 750C and the RisunMotor documentation that came with it shows different values in the error code table. i am particularly looking at 06H (low voltage as shown above, or Throttle error as shown in supplied documentation)

    Leave a comment:


  • EL34
    replied
    Thanks for this info.
    I did not get any instructions with my 750c and had no idea how the thing worked.

    Got it all working now :)

    Leave a comment:


  • paxtana
    commented on 's reply
    That's not a valid setting. If you want to limit current you need to do so in programming on the controller not the display
    https://electricbike.com/forum/forum...shd-mid-drives

  • prh88
    replied
    At the beginning of the 750c postings, there is a picture of the Advanced setting menu. The 2nd item is "Current Limit". A couple of days I looked at this menu and could see the "Current Limit". Now, the my Advanced Menu is not showing me "Current Limit"and other things. How do I get the Advanced settings menu to show me everything it showed me a couple of days ago? I am attaching a picture of what it is showing now. Thank you
    Why doesn't this list of settings show "Current Limit" anymore.  (It showed it a couple of days ago.)

    Leave a comment:


  • paxtana
    replied
    I understand it may appear that way but it is not the case.

    The controller has 9 levels programmed. If you are using a 5 level display it looks at what is programmed for levels 1-9 and only goes off of the odd numbers, it uses 1-3-5-7-9.

    It still uses the same overall range from 1-9 just doesn't offer the same level of granilarity.

    Leave a comment:


  • Ebiking Cajun
    replied
    Originally posted by prh88 View Post
    The 750 display offers 9 assist Levels in the Advanced Settings.

    Does this access more power? (power level 5 vs power level 9)?

    Or is it just fine-tuning (total assist divided by 5 vs total assist divided by 9?
    The motor will spin faster per revolution pedaled, the higher the assist level you select. So it does access more more power compared to how fast you’re pedaling.

    Leave a comment:


  • paxtana
    commented on 's reply
    It doesn't access more power

  • prh88
    replied
    The 750 display offers 9 assist Levels in the Advanced Settings.

    Does this access more power? (power level 5 vs power level 9)?

    Or is it just fine-tuning (total assist divided by 5 vs total assist divided by 9?

    Leave a comment:


  • LI-ghtcycle
    replied
    Still waiting to see on a wet or cold day for sure, but I had issues with moisture inside the display, so first I tried just sealing it, no dice, so now I have used a cell phone protector (the kind you put on the touch screen) that I had spare, trimmed it down, and used permatex form a gasket silicone to glue it to the back side of the screen, and so far, no moisture!
    Last edited by LI-ghtcycle; 03-11-2018, 06:06 PM.

    Leave a comment:


  • paxtana
    commented on 's reply
    Battery management system. You would need:
    A new battery with currently unavailable bms
    Some way for bms to communicate this with controller

    Bafang has been trying their hand at prefab bikes lately and this is rolled into those bikes but not for kits. They even bought the factory that built the 750c for us so it's now an official part of bafang rather than a Luna product.

  • dwturbo70
    replied
    What is a bms? Will it be available?

    Leave a comment:

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