BW SENSING BWM427 Manuale utente

BWM427 Serials

Modbus Dual-Axis Incli

nometer

Technical Manual

BWM 427

Modbus Dual-Axis Inclinometer

●Dual-axis inclination measurement

●Resolution: 0.001°

●Product size: L90*W40.5*H26(mm)

●Voltage input: 9~35V

●Max accuracy: 0.01°

●Measuring range: ±90°

●IP67 protection

●Communication: RS232/485/TTL optional

●Industrial automatic leveling

●Medical devices

●The solar automatic tracking system

●Tower tilt monitoring

●Hoisting angle control

●Structural deformation monitoring

●Measuring and mapping instrument

●Military equipment automation

Introduction

Features

Applications

and digital output. It has a measuring range of ± 90° and a full-scale accuracy of 0.01° and a

operating temperature of -40℃~+85℃. The product uses a high-accuracy MEMS accelerometer and

a high-resolution differential digital-to-analog converter with built-in automatic compensation and

filtering algorithms to reduce errors caused by environmental changes. It measures the change of

static gravitational field and converts it into angle change. The change directly outputs the horizontal

angle value through digital mode. It has high long-term stability, small temperature drift, simple use

and strong resistance to external interference. It apply to military equipment, industrial automation,

surveying and mapping, etc.

Bewis Sensing Technology LLC

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

Specifications

BWM 427

Modbus Dual-Axis Inclinometer

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).

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

150g(Excludes box)

Conditions

Indoor

BWM427-90

±90

X-Y

0.01

0.001

±0.005

100

according to GBT17626

≥100 MΩ

≥100000hs

°/℃

Units

Measuring range

Measuring axis

Accuracy

Resolution

Frequency response

Electromagnetic

compatibility

Insulation resistance

Shock resistance

N.W.

Zero temperature

drift

MTBF

Parameters

Max

-40~+85℃

Cross axis error 25℃0.01°

Bewis Sensing Technology LLC

www.bwsensing.com Tel: +86 510 8573 7178-801

孔Φ 2.1mm

40.5

4.5 通孔

Mechanical Characteristic

Package size

Product Size: L90*W40.5*H26（mm）

BWM 427

Modbus Dual-Axis Inclinometer

Connector

Protection level

Shell material

Installation

Metal connector（standard cable is 1.5m）

IP67

Magnesium alloy anodizing

Four M4 screws

Bare plate product size

Product size: L47*W36*H15(mm)

Note: ±1mm error for length and width dimensions, please refer to actual size.

Bewis Sensing Technology LLC

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

BWM 427

Modbus Dual-Axis Inclinometer

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

RED

VCC

DC 9-35V

BLUE

BLACK

GND

GREEN

RXD

（B、D-）

YELLOW

TXD

（A、D+）

Sensor

RED VCC DC9-35V

485+

485-

BLACK GND

RS 485 wiring diagram

GND

GREEN D-

GND

DC9-35V

BLACK GND

YELLOW TXD

RED VCC

GREEN RXD

RS 232 wiring diagram

Electrical connectionss

Electrical interfaces

Cable color

Function

Inclinometer

Signal 66

acquisition

end

YELLOW D+

BWM 427

Modbus Dual-Axis Inclinometer

Bewis Sensing Technology LLC

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

BWM 427

Modbus Dual-Axis Inclinometer

Debug software

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

use more convenient and intuitive PC software.

BWM427 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/Y direction tilt angle, and you can also

modify and set other parameters by yourself.

①

②

③

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

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 /Y direction will be displayed on the

Software use steps:

Note you can switch to Chinese or English version by the Upper right button

Bewis Sensing Technology LLC

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

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

Data format: Hexadecimal

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

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.)

X-axis Angle: Register 00 01

Y-axis Angle: Register 00 02

Product Address: Register 00 03

Zero Type: Register 00 04

The first high

address

（1byte）

High

number

（1byte）

Low register

number

（1byte）

Checksum

(2byte）

2 Command Format：

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

（1byte）

The first high

address

（1byte）

High

number

（1byte）

Low register

number

（1byte）

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）

BWM 427

Modbus Dual-Axis Inclinometer

Protocol

Bewis Sensing Technology LLC

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

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

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

0x00 0x01

0x01 0x03

Command response:

0x00 0x02

Address

Code

（1byte）

Function

Code

（1byte）

The first low

address

（1byte）

The first high

address

（1byte）

High

number

（1byte）

Low register

number

（1byte）

Checksum

(2byte）

xx xxxx

0x01 0x03 0x02 xx

Address

Code

（1byte）

Function

Code

（1byte）（1byte）

Number of

bytes

（1byte）（1byte）

Checksum

(2byte）

xxxx

0x00

0x01

0x01 0x03 0x00 0x02

Address

Code

（1byte）

Function

Code

（1byte）

The first low

address

（1byte）

The first high

address

（1byte）

High

number

（1byte）

Low register

number

（1byte）

Checksum

(2byte）

xxxx

Address

Code

（1byte）

Function

Code

（1byte）

Number of

bytes

（1byte）

Checksum

(2byte）

Command response:

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

Command response:

Note: 0000 represents 2400; 0001 represents 4800; 0002 represents 9600; 0003represents 19200.

0x0002 0x79C9

0x01

Address Code

(1byte)

Function Code

(1byte)

The high address

The low address

Data field

(2byte)

Checksum

(2byte)

0x0B

0x06 0x00

0x0002 0x79C9

0x01

Address Code

(1byte)

Function Code

(1byte)

The high address

The low address

Data field

(2byte)

Checksum

(2byte)

0x0B

0x06 0x00

The default is 0002:9600.

BWM 427

Modbus Dual-Axis Inclinometer

Data field

high

Data field

low

Bewis Sensing Technology LLC

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

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

2.5 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

2.6 Query relative/absolute zero Command: 01 03 00 04 00 01 C5 CB

Command response:

0x01

xx0x03 0x02 xx xxxx

0x00 0x01 0xC5CB

0x01 0x03 0x00 0x04

Address

Code

（1byte）

Function

Code

（1byte）

The first low

address

（1byte）

The first high

address

（1byte）

High

number

（1byte）

Low register

number

（1byte）

Checksum

(2byte）

Address Code

(1byte)

Function Code

(1byte)

Number of

bytes（1byte）

High number

（1byte）

Low

number

（1byte）

Wrong CRC

checksum

（2byte）

Command response:

2.7 Set module address Command: 01 06 00 0D 00 03 58 08

Module

address

Address Code

(1byte)

0x01

Function Code

(1byte)

The high address

The low address

Data field

(2byte)

Checksum

(2byte)

0x0D

0x06 0x00 xx xx

Module

address

Address Code

(1byte)

Function Code

(1byte)

The high address

The low address

Data field

(2byte)

Checksum

(2byte)

0x0D

0x06 0x00 xx xx

Module

address

BWM 427

Modbus Dual-Axis Inclinometer

Bewis Sensing Technology LLC

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

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