BW SENSING BWN467 Manuale utente

BWN467

Cost-effective Dual-Axis

Digital Output with Modbus

Inclinometer

Technical Manual

BWN467 is a cost-effective digital dual-axis inclination sensor bare board launched by Bewis Sensing

Technology LLC. The output mode is RS485 and TTL optional. It can be used vertically or horizontally. The

product adopts the latest technology micro-electromechanical production technology inclination unit, small

size, low power consumption, high consistency and stability, because it is a digital inclination sensor, the

linearity is easier to be corrected. The working temperature reaches industrial level -40℃～+85℃, it is a very

cost-effective inclination sensor.

When multiple sections are used in cascade, our company provides a multi-section tilt measurement

algorithm, which can achieve accurate displacement measurement of larger length and deeper depth, and

provides an automatic calibration algorithm.

●Biaxial inclination measurement

●Range：±30°

●Accuracy：0.01°

●Wide voltage input：9～35VDC

●Output mode: RS485/TTL optional with Modbus

●Multi-section cascade can be used

●Wide temperature work:-40℃～+85℃

●High vibration resistance>2000g

●Resolution：0.001°

●Bare board volume：67×20×8mm

BWN 467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

●Foundation pit monitoring

●Soil monitoring

●Dam tailings monitoring

●Exploration well

● Slope monitoring

● High-speed rail foundation monitoring

● Piling monitoring

●Deep displacement

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 189 2129 2620

Introduction

Features

Applications

BWN 467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 189 2129 2620

Specifications

Electrical Specifications

Parameters

Power supply(DC)

Operating current

Operating temperature

Store temperature

Conditions

Non-loaded

Min

-40

-55

Typical

Max

+85

+100

Units

℃

Performance Specifications

2000g,0.5ms,3times/axis

Conditions

Indoor

BWM467

±30

X-Y

0.01

0.001

±0.001

100

According to GBT17626

≥100 MΩ

≥100000 h

°/℃

Units

Measuring range

Measuring axis

Accuracy

Resolution

Frequency response

Electromagnetic

compatibility

Insulation resistance

Shock resistance

Zero temperature

drift

MTBF

Parameters

Max

-40~+85℃

Cross axis error 25℃0.01°

Resolution: The measured minimum change value that the sensor can detect and resolve within

the measurement range.

Accuracy: The error between the actual angle and the Root mean square(RMS) of the measured

angle of the sensor (≥16 times).

BWN 467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 189 2129 2620

Mechanical Characteristic

Connector

Protection level

Shell material

Installation

Line hole

Bare board

Four M2 screws

Package size

Product Size: L62*W20*H8（mm）

Circuit board schematic

Installation direction

The correct installation method can avoid measurement error. The following points should be made

when installing the sensor:

First of all, to ensure that the sensor mounting surface and the measured surface completely close,

the measured surface should be as horizontal as possible, can not have the angle shown in Figure A

and Figure C, the correct installation is shown in Figure B and Figure D.

the measured surface

uneven surface

generates the

angle

the measured surface

C D

the measured surface the measured surface

Secondly, the bottom cable of the sensor and the axis of the measured object shouldn't generate

the angle shown in E. When installing, the bottom cable of the sensor should be kept parallel or

orthogonal to the rotation axis of the measured object. This product can be installed horizontally

or vertically (vertical installation requires customization). The correct installation method is shown in

Figure F.

Finally, the installation surface of the sensor must be fixed with the measured surface tightly and

smoothly, to avoid measurement error that may be caused by the acceleration and vibration.

uneven surface

generates the

angle

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 510 8573 7158

Axis A

Axis B

Parallel

Axis A

Axis B

BWN 467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

BWN 467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 189 2129 2620

RED

VCC

9-35VDC

BLUE

BLACK

GND

GREEN

RXD

（485-）

YELLOW

TXD

（485+）

Electrical connectionss

RS 485 wiring definition

Cable color

Function

485+

485-

RS 485 wiring diagram

SensorSensor

RREEDD VVCCCC 9-35VDC

BBLLAACCK K GGNNDD GGNNDD

GGRREEEEN N DD--

InclinometerInclinometer SignalSignal 6666

2222

acquisitionacquisition

endend

YELLOWYELLOW D+D+

BBLLAACCK K GGNNDD

TTL wiring diagram

SensorSensor

GGNNDD

GGRREEEEN N DD--

InclinometerInclinometer SignalSignal 6666

2222

acquisitionacquisition

endend

YELLOWYELLOW D+D+

RREEDD VVCCCC 9-35VDC

GND

9-35VDC

BLACK GND

YELLOW TXD

RED VCC

GREEN RXD

RS 232 wiring diagram

Inclinometer

BLACK GND

BWN 467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

Note: P1 and P2 correspond to the same number

wiring, RX and TX of P3 are the receiving and sending

ends of TTL.

When RS485 is selected, VCC (9~35V), GND, AH (485+),

BL (485-) of P1 or P2 can be connected;

When TTL is selected, connect VCC (9~35V) of P1 or P2,

GND, and RX and TX of P3. The TX (transmitting end) of

the collecting end is connected to the RX (receiving

end) of the sensor P3, and the RX (receiving end) of the

collecting end is connected to the sensor. P3 TX

(transmitter)

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 189 2129 2620

BWN 467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 189 2129 2620

Debug software

Users can directly download serial assistant on official website (Supports-Download). You can also

use more convenient and intuitive PC software.

BWM467 supporting serial debugging software can be connected to the inclinometer on the

computer for angle display. The software debugging interface is as shown in the figure below. Using

the debug software, it can conveniently display the current X-direction tilt angle, and you can also

modify and set other parameters by yourself.

Correctly connect the inclinometer serial port hardware and connect the power supply.

Choose the correct device model. Select the computer serial port and baud rate and click

connect Serial Port.

Click Start and the tilt angle of the tilter in the X direction will be displayed on the screen.

Software use steps:

BWN467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 189 2129 2620

1 Data Frame Format：（8 data bits, 1 stop bit, non verification, default rate 9600）

Address

Code

（1byte）

0x01

Function

Code

（1byte）

0x03（read）

0x06（write）

The first low

address

（1byte）

xx xx

xx xxxx

The first high

address

（1byte）

High

number

（1byte）

Low register

number

（1byte）

Checksum

(2byte）

Data format: Hexadecimal

Address code: Default 01 (note: it should not exceed 255)

Function Code: 03 represents reading register,06 represents presetting register.

Checksum: it is calculated by the host. (We recommend that users need to use the CRC calculation software.)

2 Command Format：

Protocol

2.1 Read angle of X-axis Command: 01 03 00 01 00 01 D5 CA

0x00 0x01 0xD5CA

0x01 0x03

Command response:

Note: The data field is a hexadecimal number (PLC or configuration software reads the data directly with a 16-bit

register is decimal). After converting to decimal, the real data = (data field -10000)/100. If the data field is 3D52, it

is converted to decimal 15698, real data = (15698-10000)/100 = 56.98 degrees; the data field is 1230, converted

into decimal 4656, real data = (4656-20000)/100 = -53.44 degree.

0x00 0x01

Address

Code

（1byte）

Function

Code

（1byte）

The first low

address

The first high

address

High

number

Low register

number

Checksum

(2byte）

xx xxxx

0x01 0x03 0x02 xx

Address

Code

（1byte）

Function

Code

（1byte）

High

number

（1byte）

Number of

bytes

（1byte）

Low

number

（1byte）

Wrong CRC

checksum

(2byte）

2.2 Read angle of Y-axis Command: 01 03 00 02 00 01 25 CA

0x00 0x01

0x01 0x03 0x00 0x02

Address

Code

（1byte）

Function

Code

（1byte）

The first low

address

The first high

address

High

number

Low register

number

Checksum

(2byte）

xxxx

BWN 467

Cost-effective Dual-Axis Digital Output with Modbus Inclinometer

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 189 2129 2620

Command response:

xx xxxx

0x01 0x03 0x02 xx

Address

Code

（1byte）

Function

Code

（1byte）（1byte）

Number of

bytes

（1byte）（1byte）

Checksum

(2byte）

Data field

high

Data field

low

2.3 Read angle of both X-axis and Y-axis Command: 01 03 00 01 00 02 95 CB

0x01 0x03

X axis Angle

（2byte）

Y axis Angle

（2byte）

0x04 xx xxxxxx

xx xx

0x00

0x01

0x01 0x03 0x00 0x02

Address

Code

（1byte）

Function

Code

（1byte）

The first low

address

The first high

address

High

number

Low register

number

（1byte）

Checksum

(2byte）

xxxx

Address

Code

（1byte）

Function

Code

（1byte）

Number of

bytes

（1byte）

Checksum

(2byte）

Command response:

Address Code

(1byte)

0x01

Function Code

(1byte)

The high address

The low address

(2byte)

Checksum

(2byte)

0x0A

0000:

absolute zero

0001:

relative zero

Command:01 06 00 0A 00 00 A9 C8

2.4 Set relative/absolute zero

0x06 0x00

Address Code

(1byte)

0x01

Function Code

(1byte)

The first high

address register

(1byte)

The first low

address register

(1byte)

Data field

(2byte)

Checksum

(2byte)

0x0A

0000:

absolute zero

0001:

relative zero

0x06 0x00

Note: absolute zero：Based on the factory-calibrated zero point.

relative zero: Reference to the zero after the current installation.

0xA9 C8

0x68 08

2.5 Set communication rate Command: 01 06 00 0B 00 02 79 C9

Command response:

0x0002 0x79 C9

0x01

Address Code

(1byte)

Function Code

(1byte)

The high address

The low address

Data field

(2byte)

Checksum

(2byte)

0x0B

0x06 0x00

0x0002 0x79 C9

0x01

Address Code

(1byte)

Function Code

(1byte)

The high address

The low address

Data field

(2byte)

Checksum

(2byte)

0x0B

0x06 0x00

Indice

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