Megmeet L6 Series User manual

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L6 Series Controller
Document Version: V1.0
Archive Date: 2021/09/02
BOM Code:
Shenzhen Megmeet Drive Technology Co., Ltd. provides full technical support for our
customers,customers can contact local Megmeet offices or customer service centers, or
directly contact Megmeet headquarters.
Shenzhen Megmeet Drive Technology Co., Ltd.
All rights reserved. The contents in this document are subject to change without notice.
Shenzhen Megmeet Drive Technology Co., Ltd.
Address: 5th Floor, Block B, Unisplendor Information Harbor, Langshan Rd., Science &
Technology Park, Nanshan District, Shenzhen, 518057, China
Website: www.megmeet-drivetech.com
Tel: [phone]
Fax: [phone]
Service email: [email protected]

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Foreword
Thank you for choosing L6 series controller manufactured by Shenzhen Megmeet Drive Technology Co., Ltd.
L6 series controller has the following features for low voltage motors:
1. Optimized PID control algorithm implementation;
2. Adopt the electric differential speed control, which saves the front axle and differential and makes the
control more flexible;
3. Advanced pulse width modulation technology to ensure high efficiency of battery utilization and reduce loss
of motor energy consumption and torque conversion;
4. The online programming of the controller can guarantee the upgradeability of the product;
5. Through accurate speed closed loop and position closed loop control, tire wear can be minimized and the
service life of the equipment can be extended;
6. Using the CAN bus communication technology used in the automobile, it has the characteristics of large
communication data, fast communication speed, good fault tolerance and high reliability;
7. By detecting the steering angle of the steering wheel and different vehicle speeds, the control strategy
independently developed by MEGMEET is used to realize different functions such as turning, speed limiting
and braking recovery. In addition, according to the different needs of customers, ESP electronic body
stabilization function can be realized;
8. Battery electrode reverse connection protection, output drive short circuit, charging fault alarm, overheat
protection, contactor adhesion alarm provides protection for motor and electronic control;
9. With the development of automation and intelligence in the future, the technology and products can be
applied to high-power AGV systems, automatic forklift control systems, battery touring buses, golf carts, lawn
mowers, cleaning vehicles, etc., realizing intelligent, unmanned development;
10. It can be directly connected to the host computer to monitor the running status of the vehicle in real time;
11. The product is completely autonomous design and can be customized according to customer needs.
Highlight the customer's product features;
12. Compared with foreign products, this product has higher cost performance and the overall cost can be
close to the counterbalance forklift, but the flexibility is better than the counterbalance forklift.
The relevant precautions during the installation, wiring, parameter setting, troubleshooting and daily
maintenance will be detailed in this manual. To ensure the correct installation and operation of the L6 series
controller as well as its high performance, please read carefully this user manual before installing the
equipment. This manual shall be kept properly and delivered to the actual users of the drive.
Precautions for unpacking inspection
Please check carefully when unpacking the product:
·Whether the product has the damage signs;
·Whether the rated value in the nameplate is consistent with your order requirement.

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We have implemented strict inspection on the manufacturing, package and delivery of the product. If there is
any error, please contact us or your distributor immediately.
We are engaged in the continuous improvement of controller. The relevant manuals provided by us are
subject to change without prior notice.
Safety precautions
Operation without following instructions can cause death or severe personal injury.
Operation without following instructions can cause medium or slight personal injury or
damage to the product and other equipment.
·Please install the product on the incombustible materials (e.g., metal), otherwise, fire may be caused.
·Do not place any combustible material near the product, otherwise, fire may be caused.
·Do not install the product in the environment with explosive gas, otherwise, explosion may be caused.
·Only qualified personnel can wire the drive, otherwise, electric shock may be caused.
·Never wire the controller unless the input AC supply is completely disconnected, otherwise, electric shock
may be caused.
·The grounding terminal of the controller must be reliably grounded, otherwise, electric shock may be
caused.
·The cover must be properly closed before power-up, otherwise, electric shock and explosion may be
caused.
·When powering up the controller that has been stored for over 2 years, the input voltage must be gradually
increased with the voltage regulator, otherwise, electric shock and explosion may be caused.
·Do not touch the terminals when the product is powered up, otherwise, electric shock may be caused.
·Do not operate the controller with wet hands, otherwise, electric shock may be caused.
·Maintaince operation can not be conducted until 10 minutes has passed after disconnecting the power
supply. Meanwhile, be sure to confirm that the chage LED is completely off and the DC bus voltage is
below 36V, otherwise, electric shock may be caused.
·Only qualified personnel can replace the components. Do not leave any wire or metal parts inside the
drive, otherwise, fire may be caused.
·After changing the control board, the parameters must be properly set before operating the drive,
otherwise, property damage may be caused.
·The bare parts of the terminal lugs in the main circuit must be wrapped with insulation tape, otherwise,
electric shock may be caused.

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·When carrying the drive, protect the operation panel and the cover against any stress, otherwise, the drive
may drop and cause human injury or property damage.
·Please install the controller on the place that can withstand the weight of the drive, otherwise, the drive
may drop and cause human injury or property damage.
·Do not install the controller in the environment with water splash (e.g., near the water pipe), otherwise, you
may suffer the property loss.
·Take care not to drop any foreign objects, such as the screws, gaskets and metal bars, into the controller,
otherwise, fire and property damage may be caused.
·Do not install and operate the controller if it is damaged or its components are not complete, otherwise, fire
and human injury may be caused.
·Do not install the product in the place exposed to direct sunlight, otherwise, property damage may be
caused.
·Cable lugs must be firmly connected to the terminals of main circuit, otherwise, property damage may be
caused.

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Contents
Chapter 1 Introduction of L6 Series Controller..............................................................................6
1.1 Introduction................................................................................................................................................................. 6
1.2 Product model............................................................................................................................................................6
1.3 Product nameplate....................................................................................................................................................6
1.4 Product series............................................................................................................................................................ 7
1.5 Technical specifications of product........................................................................................................................8
1.6 Outline, mounting dimensions and gross weight of controller........................................................................ 9
1.7 MEGMEET controller instrumentation................................................................................................................14
1.8 Product use environment and installation requirements................................................................................20
Chapter 2 Wiring of Controller.......................................................................................................22
2.1 Wiring and configuration of main circuit terminals...........................................................................................22
2.2 Wiring and configuration of control circuit......................................................................................................... 27
Chapter 3 Quick Operation Guide for Controller........................................................................ 30
3.1 Controller operation panel.....................................................................................................................................30
3.2 LED description....................................................................................................................................................... 30
3.3 Introduction to operation panel keys...................................................................................................................31
3.4 Identification of LED display symbols.................................................................................................................32
3.5 LED interface definition......................................................................................................................................... 32
Chapter 4 Parameter List............................................................................................................... 33
4.1 Basic menu function code parameter table.......................................................................................................33
Chapter 5 L6 Series Controller Debugging Steps...................................................................... 59
5.1 L6 series controller installation preparation...................................................................................................... 59
5.2 L6 series controller detection............................................................................................................................... 59
5.3 L6 series controller debugging.............................................................................................................................61
5.4 Controller and motor matching.............................................................................................................................63
5.5 Measurement........................................................................................................................................................... 64
Chapter 6 Troubleshooting.............................................................................................................66
6.1 LED indicator display mode..................................................................................................................................66
6.2 Alarm code table......................................................................................................................................................66
6.3 Fault code table.......................................................................................................................................................67
6.4 DIDO function definition.........................................................................................................................................69
Appendix 1 Precautions..................................................................................................................71
Appendix 2 Warranty and Service................................................................................................ 73

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Chapter 1 Introduction of L6 Series Controller
1.1 Introduction
This series of controller is a low voltage DC input, high current output AC motor controller, powered by a
battery system, can be used in electric forklifts, battery touring buses, golf carts, lawn mowers, cleaning cars,
AGV cars and various small passenger cars.
1.2 Product model
The description of the controller model on the nameplate indicates the information of the product, such as
product series, voltage class of power supply, power class, the software/hardware code of customized
product, etc.
1.3 Product nameplate
Shenzhen Megmeet Drive Technology Co., Ltd.
MODEL
VOLTAGE
CURRENT
S/N
: L 6 3 6 -4 8 4 5 -P
: 4 8 V
: 4 5 0 A
0100 0000 0100 0000
E6120009820187000019 L636-4845-P
:

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1.4 Product series
Table 1-1 Name and model of controller
Model
Voltage
level
Operating
voltage range
Power supply
starting voltage
Output current
IP
rating
Cooling
method
1
hour
2 min
1 min
30 s
L632-2420
24VDC
20V~28V
18V
150A
200A
*
*
IP65
Natural
cooling
L632-2437
24VDC
20V~28V
18V
185A
375A
*
*
IP65
Natural
cooling
L632-4827
48VDC
33V~60V
28.8V
120A
275A
*
*
IP65
Natural
cooling
L632-4835
48VDC
33V~60V
28.8V
175A
350A
*
*
IP65
Natural
cooling
L636-4845
48VDC
33V~60V
28.8V
150A
450A
*
*
IP65
Natural
cooling
L636-8035
80VDC
56V~96V
48V
120A
350A
*
*
IP65
Natural
cooling
L636-8045
80VDC
56V~96V
48V
150A
450A
*
*
IP65
Natural
cooling
L636-9620
96VDC
72V~120V
65V
90A
200A
*
*
IP65
Natural
cooling
L636-1420
144VDC
105V~165V
100V
90A
200A
*
*
IP65
Natural
cooling
L638-4865
48VDC
33V~60V
28.8V
200A
650A
*
*
IP65
Natural
cooling
L638-8050
80VDC
56V~96V
48V
155A
500A
*
*
IP65
Natural
cooling
L638-8065
80VDC
56V~96V
48V
200A
650A
*
*
IP65
Natural
cooling
L638-9650
96VDC
72V~120V
65V
155A
500A
*
*
IP65
Natural
cooling
L638-1435
144VDC
105V~175V
96V
100A
350A
*
*
IP65
Natural
cooling
L638-1450
144VDC
105V~175V
96V
135A
*
500A
*
IP65
Natural
cooling
L640-4D12
300VDC
250V~410V
*
53A
*
110A
*
IP67
Natural
cooling
L640-4D20
300VDC
250V~410V
*
96
*
192A
*
IP67
Air
cooling
L640-4D30
320VDC
250V~410V
*
120A
*
*
260A
IP67
Water
cooling
L650-5D60
500VDC
450V~600V
*
150A
*
*
300A
IP67
Water
cooling

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L650-5D90
500VDC
450V~600V
*
225A
*
*
450A
IP67
Water
cooling
L650-5DB0
500VDC
450V~600V
*
300A
*
*
600A
IP67
Water
cooling
Note: 96V and 144V models are being developed, * indicates that there is no such parameter.
1.5 Technical specifications of product
Table 1-2 Technical specifications of controller
Control
features
Control mode
Closed loop vector, IF mode, VF mode
Maximum output
frequency
300Hz
Product
functions
Basic frequency
0Hz~300.0Hz
Startup
frequency
0Hz~60.00Hz
PWM frequency
16kHZ
Logic input
current
<10mA
Over
temperature
protection
Pre-alarm at 75°C, cut off at 95°C
Radiator
insulation
strength
500Vac
Protection
degree
IP65
Cooling mode
Natural cooling (vehicle large heat sink), otherwise forced air cooling is required
Application
place
Used for a variety of electric vehicles, including material handling vehicles, industrial
vehicles, golf carts, off-highway vehicles and other low-speed vehicles.
Battery status
Have
Timer function
Have
Host computer
detection
function
Waveform status detection, IO port status detection, parameter online upload,
download
CANopen
communication
High-speed CAN communication, stable and timely monitoring of the working status of
the controller
Handheld
controller
Programmable control of the controller through the handheld controller
Protection
function
Over-voltage protection; over-current protection; over-temperature protection; power-on open circuit
protection; tire angle sensor fault; accelerator pedal fault; overload protection; contactor suction fault;
contactor open fault; long charging time protection; charging failure protection; current detection abnormal
protection; KSI startup abnormal protection; encoder fault; CAN communication fault.
Environment
Operating site
No condensation, icing, rain, snow, hail, etc., solar radiation is less than 700W/m2, air

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pressure is 70~106kPa.
Altitude
Used at the place lower than 1000m (derated at the place above 1000m, derated 1%
for every increase of 100m)
Ambient
temperature
-30℃~+50℃(derated when used in the ambient temperature of 40℃~50℃)
Humidity
5%~95%RH, non-condensing
Vibration
Less than 9.8m/s2(1g)
Storage
temperature
-40℃~+70℃
1.6 Outline, mounting dimensions and gross weight of controller
The dimensions of the controller are as follows:
Fig. 1-1 Outline, mounting dimensions of L632

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Fig. 1-2 Outline, mounting dimensions of L636

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Fig. 1-3 Outline, mounting dimensions of L638

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Fig. 1-4 Outline, mounting dimensions of L640

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Fig. 1-5 Outline, mounting dimensions of L650
Table 1-3 Outline, mounting dimensions and gross weight
Model
Gross weight (kg)
Dimension(mm)
L632-2420
2.23
180*140*73.5
L632-2437
L632-4827
L632-4835
L636-4845
4.12
244*165*92
L636-8035
L636-8045
L636-9620
L636-1420
L638-4865
6
244*275*92
L638-8050
L638-8065
L638-9650

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L638-1435
L638-1450
L640-4D12
5.6
322*242*271.5
L640-4D20
5.6
322*242*127.5
L640-4D30
5.4
322*242*131.5
L650-5D60
11.5
417*280.4*175
L650-5D90
L650-5DB0
Note: 96V and 144V models are being developed.
1.7 MEGMEET controller instrumentation
1.7.1 Product model description
1.7.2 Product series
Model
Voltage
level
Operating
voltage range
Power supply
starting voltage
IP rating
Operating
ambient
temperature
Cooling method
P6-24
24VDC
11V~48V
11V
IP65
-20℃~+70℃
Natural cooling
P6-80
80VDC
48V~90V
48V
1.7.3 Features

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Description of fault light flashing
No.
Fault light
Fault description
Troubleshooting
1
Communication fault
light flashing
The communication between
the instrumentation and the
controller is abnormal.
Check whether the communication
cable is connected correctly
2
Handbrake light stays
on
The handbrake switch is pulled
up
Release the handbrake switch
3
Seat fault light
flashing
Driver leaves the seat
The driver needs to be seated
correctly in the driver's seat
4
Battery fault light
flashing
Battery level is below 15%
Need to charge the battery
1.7.4 Main interface
Enter the menu
Back to previous menu level
Cursor up
Cursor down
Communication
fault light
Hand brake light
Seat switch fault
light
Low battery fault
light

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1. Battery level display, display value is 0% ~ 100%;
2. WORKED: The instrumentation 's working time is counted, and it starts to count after power on;
3. T: The communication status with the main drive is displayed, OK is displayed when the communication is
normal, and a corresponding fault function code appears when the communication is abnormal;
4. P: The communication status with the pump drive is displayed, OK is displayed when the communication is
normal, and a corresponding fault function code appears when the communication is abnormal;
5. ●: Gear status display. When the lever is turned, three states ( forward), ●(neutral) and
(backward) are displayed.
6. 0.0Km / h: Vehicle running speed display.
1.7.5 Menu interface
1.First-level menu bar
In hours
Communication with
the main drive
Communication with
pump drive
High and low
speed modes
Forward, backward and
neutral position display
Battery level display
Speed display
Icon display bar

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Entry method: In the case of the main interface, press key once to enter the first-level menu. The first-level
menu includes the “TESTER” and “SETTING” second-level menus.
Exit method: Press once to exit the menu and return to the main interface.
2. TESTER second-level menu bar
Entry method: With the cursor in "TESTER", press the key once to enter the second-level menu; the
"TESTER" submenu includes "CURRENT (output current)", "MOTOR SPEED (motor speed)", "MOTOR
TEMP ( Motor temperature), CNTRL TEMP (drive temperature).
Exit method: press key once to return to the first-level menu, press again to exit the menu and return to
the main interface.
3. SETTING second-level menu bar
The second-level menu bar is mainly used to modify the parameters. You need to enter the password before
changing the parameters.

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Entry method: In the case of the main interface, press once, then press ▼again, move the cursor to
SETTING, and then press to enter the hour meter clear input password interface, press ▲key, enter the
first password, and then press ▼to enter into the second password change, input the four digit password in
sequence, and press the confirm button to clear the hour meter.
Exit method: press key once to return to the first-level menu, press again to exit the menu and return to
the main interface.
1.7.6 Dimensions
Length * width * height = 180MM * 120MM * 58.5MM

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1.7.7 Terminal definition
Pin
Definition
Description
J1-PIN1
BATTERY+
Connect to battery positive, 18-90V DC input
J1-PIN2
BATTERY-
Connect to battery negative, 0V
J1-PIN3
SENDER1
0-3.3V analog input
J1-PIN4
SENDER2
0-3.3V analog input
J1-PIN5
SENDER3
0-5V analog input
J1-PIN6
SENDER4
0-5V analog input
J1-PIN7
Switched-input1
Digital input 1, active high
J1-PIN8
Switched-input2
Digital input 2, active high
J1-PIN9
Switched-input3
Digital input 3, active high
J1-PIN10
Switched-input4
Digital input 4, active high
J1-PIN11
Switched-input5
Digital input 5, active high
J1-PIN12
Switched-input6
Digital input 6, active high
J1-PIN13
KEY-Switched-input
Key switch input, active high
J1-PIN14
Mosfet-out1
Drive output 1, open collector
J1-PIN15
Mosfet-out2
Drive output 2, open collector
J1-PIN16
Mosfet-out3
Drive output 3, open collector
J1-PIN17
NC

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J1-PIN18
SENDER
0-5V analog input
J1-PIN19
NC
J1-PIN20
NC
Pin
Definition
Description
J2-PIN1
CAN-H
Communication with the drive CAN-H
J2-PIN2
CAN-L
Communication with the drive CAN-L
J2-PIN3
GND
Connect to battery negative
J2-PIN4
J2-PIN5
CAN-H
CAN communication terminal resistance strobe, short
with J2-PIN6 when needed
J2-PIN6
CAN-TERM
CAN communication terminal resistance strobe, short
with J2-PIN5 when needed
J2-PIN7
RS485-
Reserved for 485- communication, for external card
charging terminal
J2-PIN8
RS485+
Reserved for 485+ communication, for external card
charging terminal
J2-PIN9
J2-PIN10
GND
Grounding
J2-PIN11
J2-PIN12
+7Vout
7V power output, output current 0.1A
1.8 Product use environment and installation requirements
When selecting the installation environment, the following issues should be taken into account:
• The controller should be fixed on a clean and flat metal plate, and evenly apply a proper amount of thermal
silica between the bottom of the controller and the metal plate. The metal plate is generally selected from an
aluminum plate.
• The installation position of the controller should be selected where the ventilation and heat dissipation are
good.
• Keep the controller and its vicinity clean.
• The ambient temperature should be within -20℃~50℃. If the temperature exceeds 50℃, external forced
cooling or derating is required.
• The humidity should be less than 95％RH, non-condensing.
• The vibration at the installation place should be less than 5.9m/s2(0.6g).
• The device should be protected from the direct sunlight.
• Do not install the device in the place with corrosive gas and explosive gas.
Electrical connection requirements:
• The main fuse and control loop fuse must be installed, and the specifications should match the maximum
current value of the controller;