TFmini-i User Manual

TFmini-i User Manual

Benewake (Beijing) Co., Ltd

PREFACE

Dear users: Thank you for choosing Benewake products. For the purpose of offering better operation experience to you, we hereby write this manual for an easier and simpler operation of our product, hoping to better solve the common problems you may meet. This user manual contains the relevant information on product introduction, usage and maintenance of TFmini-i, covers the product operation introduction and common problem solutions. Please read this manual carefully before using the product. Remember the precautions to avoid hazards, and please follow the described steps in the manual when using it.

If you have any problems in the process of usage, you are welcome to contact Benewake at any time for help.

Contact Details Official website: https://ai.benewake.com/en/products/tfmini-i/ TEL：+86-10-57456983 Technical questions，please contact： support@benewake.com Consult sale information or request brochure，please contact： bw@benewake.com

Headquarters Address Benewake (Beijing) Co., Ltd. 3rd Floor, Haiguo Jiaye Sci-Tech Park, Haidian District, Beijing, China

Copyright Statement This User Manual is copyright © of Benewake. Please do not modify, delete or translate the description of this manual contents without the official written permission from Benewake.

Disclaimer As our products are constantly improving and updating, the specifications of TFmini-i are subject to change. Please refer to the official website for latest version.

CONTENTS

1 OVERVIEW....................................................................................................................................... 1

1.4 Storage.................................................................................................................................. 4 1.5 Application............................................................................................................................ 4 2 INTERFACE.......................................................................................................................................5

OVERVIEW

1 OVERVIEW

TFmini-i is an updated single-point ranging LiDAR based on TFmini-S. It has been optimized in communication interface and input voltage, making it satisfy different industrial applications. The product is based on the ToF (Time of Flight) principle and provides stable, accurate and reliable ranging performance.

1.1 Technical Specification

Table 1- 1 Technical Specification of TFmini-i Type Parameters Values

90% reflectivity, 0Klux 0.1m~12m

Frame rate② 1Hz~100Hz（adjustable, default100Hz） Ambient light immunity 70Klux Enclosure rating IP65

FoV③ 2° Supply voltage DC 7V~30V

Electrical Average current ≤65mA @12V parameters Power consumption ≤0.8W @12V

Peak current 100mA Dimension 50mm×34mm×41mm (L×H×W) Housing ABS/PC/PMMA

Others Operating temperature -20℃~60℃

Storage temperature -30℃~75℃ Weight 52g (with cables) Cable length④ 70cm/200cm

OVERVIEW

Note 1 The detection is measured with the standard white board (90% reflectivity). 2 The frame rate can be adjusted. The default value is 100Hz and the maximum value is 100Hz, the customized frame rate should be calculated by the formula: 200/n (n is an integer with ≥ 2). 3 The angle is a theoretical value, the actual angle value has some deviation. 4 200cm cable without terminals at the end, for the loose wire state.

1.2 Maintenance and Cleaning

 Before switching on, please check if the exposed window mirror is clean, and clean it promptly if it is dirty.  After using the device, check the optics. If it is contaminated, please clean it promptly.  The optics should be cleaned regularly if the device be operated in a severe environment for a long time.  Before regular cleaning, please disconnect the power. Using a soft cloth to gently wipe the window in the same direction when the device is not operating, to avoid repeated wiping and damage to the window mirror.  When cleaning the window, do not use alcohol to clean, so as not to damage the window.  If you require deep cleaning of internal optics, please contact bw@benewake.com to offer professional advice.

1.3 Appearance and Installation

The appearance and dimensions of TFmini-i are shown in Figure 1- 1:

OVERVIEW

Figure 1- 1 Appearance and dimension of TFmini-i (Unit: mm)

TFmini-i has four φ1.6 mounting screw holes in the back, hole depth of 5mm, as shown in Figure 1- 2. The installation is recommended to use four M2 cross round head flat-tailed self-tapping screws, the length of the screws is related to the thickness of the installed structural parts, it is recommended that the depth of the screws installed more than 3mm, you can choose the screws according to the following table.

Figure 1- 2 The mounting holes of TFmini-i

Table 1- 2 TFmini-i mounting screw model recommendation The thickness of the installed structural parts Recommended screw type

≤1mm M2*4 1mm~3mm M2*6 3mm~5mm M2*8

Warning 1 Two sizes of screws, M2*6 and M2*8, are included in the package, please choose according to the actual situation. 2 Do not use excessively long screws to prevent penetration of the product housing and compromise the protective characteristics of the product. 3 To prevent the optical surface from being dirty, the product optical

OVERVIEW

window will be pasted with dustproof film, it is recommended to remove the film before use. 4 Please do not block the front of the product optical lens, the front surface of the product is recommended to be flush with the surrounding structural parts to prevent affecting the light path.

1.4 Storage

 Device should be stored at -30 ° C to 80 ° C with a relative humidity ≤ 60% and ventilation free from corrosive gases.  Before storage, please make sure that all connections are disconnected or dust covers are inserted or covered to ensure cleanliness.  If storage time is over three months, please carry out a working test before using, to ensure that the device can be used in normal condition.  For ensuring the product performance, do not open the product shell or remove the IR-pass filter.

1.5 Application

When using the product, please read the specifications, user manual and the precautions mentioned in the user manual in detail to ensure that the product is used within the rated specifications. The product is designed for use in the following scenarios:  Robot  Intelligent Transportation  Intelligent Device  UAV  Other Industrial Products If you use the product beyond the above application scope, please carefully evaluate whether the reliability requirements of the product to be applied match this product, or contact Benewake at any time to assist in solving it.

INTERFACE

2 INTERFACE

2.1 Description About Wiring Sequence

Terminal model: MH1.25-7P-W/B, size of single wire is AWG26, diameter of single wire is 0.404mm, cross-sectional area is 0.129mm2, which show in Table 2- 1.

Figure 2- 1 TFmini-i external wiring connector and wiring sequence

Table 2- 1 The Function Description of Each Wire

Pin Wiring color Function Comment 1 Red VCC Power supply 2 White/Yellow RS485-B/CAN_L RS485-B/CAN bus 3 Green RS485-A/CAN_H RS485-A/CAN bus 4 N/A N/A N/A 5 Blue/Orange UART_RXD UART receive (Debug) 6 Brown UART_TXD UART transmit (Debug) 7 Black GND Ground Warning 1 The hardware of RS-485 and CAN is different; 2 Do not mix UART cable with RS485 or CAN bus, otherwise it will

cause damage of MCU. 3 TFmini-i with RS-485 interface does not support UART debugging pins.

2.2 Electrical Characteristics Table 2- 2 Main Electrical Parameters of TFmini-i

Parameter Values Supply voltage DC 7V~30V Average current ≤65mA@12V Peak current 100mA

Average power consumption ≤0.8W@12V

COMMUNICATION PROTOCOL

3 COMMUNICATION PROTOCOL

There are two communication interfaces available. The hardware of RS485 and CAN is different. The interface cannot be switched by command. 3.1 RS-485 Communication Protocol

3.1.1 Communication protocol Modbus protocol is the default setting for RS-485 interface. The parameter is shown in Table 3- 1. The default value of baud rate and slave ID is 115200 and 0x01. Table 3- 1 RS-485 Communication protocol of TFmini-i

Characteristics Values Communication interface RS-485 Baud rate 115200 Data bit 8 Stop bit 1 Parity None

Note The following baud rates are supported: 9600，14400，19200，38400，43000， 57600 ， 768000 ， 115200(default) ， 128000 ， 230400 ， 256000. It is not recommended to use a baud rate above 115200 for communication because of communication stability.

3.1.2 Parameter configuration description of Modbus protocol

3.1.2.1 Description of data frame

When Modbus protocol of TFmini-i is enabled, the Modbus command format of reading distance is shown in Table 3- 2. Table 3- 2 The command format of reading distance Addr. Function code Register Addr. Register Value CRC_Low CRC_High 01(Default) 03 00 00 00 01 xx xx The response data frame format is shown in Table 3- 3. Table 3- 3 The response date frame format Addr. Function code Length Dist_High Dist_Low CRC_Low CRC_High 01(Default) 03 02 XX XX xx xx

COMMUNICATION PROTOCOL

3.1.2.2 Function code

The function code of TFmini-i is shown in Table 3- 4. Table 3- 4 The function code

Function Code Description 03 Read register 06 Write register

3.1.2.3 Register address list

 All register addresses are hexadecimal and register values are 16 bits;  After setting parameter, save and restart to take effect. Register address list using function code: 0x03(read only) Table 3- 5 Register address of function code (0x03) Register Definition Description Addr. 00 00 Dist Distance value, unit: cm 00 01 Strength Signal strength

version

00 07 Low 16 bits of firmware version Sub-version and revised version

number

Register address list using function code: 0x06(write only)： Table 3- 6 Register address of function code (0x06) Register Definition Description Addr. 00 80 Save setting Write any value to save settings

Register value:

00 81 Power off/Reboot 0x00: power off (Not currently supported)

0x01: reboot

00 82 Disable Modbus Register Value:

0x01: Disable Modbus

00 83 High 16 bits of baud rate Set baud rate, save and reboot to take

effect

COMMUNICATION PROTOCOL

00 84 Low 16 bits of baud rate Set baud rate, save and reboot to take

effect

00 85 Slave ID Set slave ID, save and reboot to take effect

(default 0x01)

00 86 Frame rate Set frame rate, save and reboot to take

effect (default 100Hz)

Set working mode, save and reboot to take

00 87 Working mode effect. Register value:

0x00: continuous detection mode (default)

0x01: triggering mode

Set low power consumption mode, save

Low power consumption and reboot to take effect. Register value:

00 88 mode 0x00: Disable (default)

0x0N: Enable, N is a positive integer with ≤

10,which is sampling frequent of TFmini-i

00 89 Restore default Write any value, save and reboot to take

effect

3.1.3 Parameter configuration Table 3- 7 General command of RS-485 serial communication mode Function Command Respnse Description Enable Modbus 5A 05 15 01 75 5A 05 15 01 75 Save and reboot to take effect

The default setting is:

LL(Low bit)=FF，HH(High bit)=FF

Save setting 5A 04 11 6F 5A 05 11 00 70

Table 3- 8 General command of Modbus protocol Function Command Response Description

DH: High 8 bits of distance

Read distance 01 03 00 00 00 01 03 02 DH DL DL: Low 8 bits of distance

01 84 0A CL CH CH: High 8 bits of CRC

CL: Low 8 bits of CRC

Read distance 01 03 00 00 00 01 03 04 DH DL SH: High 8 bits of signal strength and signal 02 C4 0B SH SL CL CH SL: Low 8 bits of signal strength

COMMUNICATION PROTOCOL

strength Read firmware 01 03 00 06 00 01 03 04 00 VM VM: Main version number version 02 24 0A VS VC CL CH VS: Sub-version number

VC: Revised version number BH1: High 8 bits of baud rate BH2: Secondary high 8 bits of

baud rate

01 06 00 83 01 06 00 83 BL1: Secondary low 8 bits of

Set baud rate to 9600 (0x00002580): BH1=00 BH2=00 CL=78 CH=22, BL1=25 BL2=80 CL=D2 CH=D3 IH: High 8 bits of slave ID

01 06 00 85 IH 01 06 00 85 IH IL: Low 8 bits of slave ID

Modify slave ID IL CL CH IL CL CH For example:

Modify slave ID to 0x0002: IH=00 IL=02 CL=19 CH=E2 FH: High 8 bits of frame rate FL: Low 8 bits of frame rate

Modify frame 01 06 00 86 FH 01 06 00 86 FH For example: rate FL CL CH FL CL CH Modify frame rate to 100

(0x0064):

FH=00 FL=64 CL=69 CH=C8 LH: High 8 bits of sampling frequent in low power consumption mode

For example: Set it to 5Hz low power consumption mode, LH=00 LL=05 CL=C9 CH=E3

Save setting 01 06 00 80 00 01 06 00 80 00 Save and reboot to take effect

00 88 22 00 88 22

COMMUNICATION PROTOCOL

Disable Modbus 01 06 00 82 00 01 06 00 82 00 Save and reboot to take effect

01 E8 22 01 E8 22

Restore factory 01 06 00 89 00 01 06 00 89 00 setting 00 58 20 00 58 20

Warning 1 RTU mode is only supported for communication in serial communication.

For example:

1) Enable Modbus protocol in RS-485 serial communication mode: 5A 05 15 01 75 //Enable Modbus protocol 5A 04 11 6F //Save settings Enter Modbus protocol mode after rebooting.

2) Disable Modbus protocol: 01 06 00 82 00 01 E8 22 //Default address is 0x01, disable Modbus protocol 01 06 00 80 00 00 88 22 //Default address is 0x01, save setting Exit Modbus protocol after rebooting.

3.2 CAN Communication Protocol

3.2.1 Communication Protocol The CAN communication protocol of TFmini-i supports customer-defined protocol parameters or customized services, and the CAN protocol baud rate and ID can be modified. The CAN protocol is shown in Table 3- 9. Table 3- 9 CAN communication protocol of TFmini-i

Characteristics Default values Communication interface CAN Baud rate 250kbps Transmitting ID 0x00000003 Receiving ID 0x00000003 Frame format Standard frame

Warning 1 0 is the broadcast ID and cannot be set as transmitting/receiving ID. 2 The following baud rates are supported: 1000kbps ， 900 kbps ， 800 kbps，666 kbps，500 kbps，400 kbps，250 kbps，200 kbps，160 kbps， 125 kbps，100 kbps.

COMMUNICATION PROTOCOL

3.2.2 CAN Communication Data Frame The data protocol of CAN is shown in Table 3- 10. Each data frame consists of 8 bytes and the data contains the distance (unit: cm), signal strength and timestamp (unit: ms). Table 3- 10 The date frame format of CAN communication

3.2.3 CAN Bus Network The CAN bus network is mainly hung in CAN_H and CAN_L, and each node performs serial differential transmission of signals through two lines. In order to avoid signal reflection and interference, it is recommended to connect 120Ω end point resistors at both ends of the bus, as shown in Figure 3- 1.

Figure 3- 1 CAN bus network of TFmini-i

The maximum recommended number of cascading stations for CAN networks is shown in the table below. Table 3- 11 The maximum recommended number of cascading stations for CAN networks

COMMUNICATION PROTOCOL

Note It is recommended to contact Benewake to communicate the details of use to complete networking requirements.

3.2.4 Parameter Configuration of CAN Communication The configuration command format of CAN communication is shown as below. Table 3- 12 The configuration command format

Type: 0(Standard Frame), 1(Extended Frame); Recv_id: TFmini-i receiving ID, Little Endian; Send_id: TFmini-i transmitting ID, Little Endian. Baudrate: The code of baud rate, default 250kbps, corresponding to 0x08. The relation between baud rate(unit: kbps) and Byte4 is shown as below:

Table 3- 13 The byte4 value corresponds to the baud rate

Example of configuration: Example1: Standard frame, Baud rate 500kbps, receiving ID=0x00000010, transmitting ID=0x00000020 Command: 5A 0E 51 00 05 10 00 00 00 20 00 00 00 EE Example2: Extended Frame, Baud rate 250kbps, receiving ID=0x0000AABB, transmitting ID=0x0000CCDD Command: 5A 0E 51 01 08 BB AA 00 00 DD CC 00 00 D0 3.2.5 Other Parameter Configuration Table 3- 14 General parameter configuration of TFmini-i

COMMUNICATION PROTOCOL

HH: High 8 bits of frame rate

5A 05 02 01 62 Failed

Disable/Enable 5A 05 07 00 66 5A 05 07 00 66 Disable data output output 5A 05 07 01 67 5A 05 07 01 67 Enable data output

The default setting is:

LL(Low bit)=FF，HH(High bit)=FF

5A 05 11 01 71 Failed

Enable/Disable 5A 05 60 01 C0 5A 05 60 01 C0 Enable 120Ω terminal resistor 120Ω terminal 5A 05 60 00 BF 5A 05 60 00 BF Disable 120Ω terminal resistor resistor⑤

Warning 1 The customized frame rate should be calculated by the formula: 200/n (n is an integer with ≥ 2). 2 SU is checksum, checksum is disable by default. 3 Please keep power on and wait 1s after sending system reset command, otherwise the settings will not take effect. 4 After parameters configuration, send saving settings command to save the configuration, otherwise the settings will not take effect. 5 120Ω terminal resistor is disable in default.