BW SENSING BWM410 Series Programmierhandbuch

BWM410

Serials

Voltage Single-Axis Inclinometer

Technical Manual

●Single-axis inclination measurement

●Resolution: 0.001°

●Output mode: 0-5V/0-10V optional

●Voltage input: 12~35V

●Max accuracy: 0.05°

●Measuring range: ±180°

●Way of communication: RS232

●IP67 protection

●Industrial automatic leveling

●Medical devices

●The automatic tracking system of solar angle

●Tower tilt monitoring

●Hoisting angle control

●Structural deformation monitoring

●Measuring and mapping instrument

●Military equipment automation

Introduction

Features

Applications

with MEMS technology and voltage output. It has a measuring range of ± 180° and a full-scale

accuracy of 0.05° 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 voltage 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.

BWM 410

Voltage Single-Axis Inclinometer

Bewis Sensing Technology LLC

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

2000g,0.5ms,3times/axis

225g(Includes standard 1.5m cable, no box)

Conditions

Indoor

BWM410

0~±180

0.05

0.001

±0.005

100

according to GBT17626

≥100 MΩ

≥30000 hours/time

°/℃

Units

Specifications

Electrical Specifications

Performance Specifications

Measuring range

Measuring axis

Accuracy

Resolution

Frequency response

Electromagnetic

compatibility

Insulation resistance

Shock resistance

N.W.

Zero temperature

drift

MTBF

Parameters

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).

Note: The output voltage and corresponding angle are adjustable.

For example, the output variation range is ±15°, corresponding to -15° output voltage 0V, and 15° output

voltage 5V (10V).

For example, the output variation range is ±137°, corresponding to -137° output voltage 0V, and 137° output

voltage 5V (10V).

BWM 410

Voltage Single-Axis Inclinometer

Parameters

Power supply(DC)

Operating current

Output load

Operating

temperature

Store temperature

Min

-40

-55

Typical

Max

+85

+100

Units

KΩ

℃

Conditions

Non-loaded

Resistivity

Capacitive

Full scale output

voltage 0-5V/0-10V optional

Bewis Sensing Technology LLC

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

Mechanical Characteristic

Connector

Protection level

Shell material

Installation

Metal connector（standard cable is 1.5m）

IP67

Magnesium alloy anodizing

Four M4 screws

BWM 410

Voltage Single-Axis Inclinometer

孔Φ 2.1mm

Package size

Product Size: L90*W40.5*H26(mm)

40.5

4.5 通孔

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

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

BWM 410

Voltage Single-Axis Inclinometer

Bewis Sensing Technology LLC

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

RS232 Electrical interfaces

RED

VCC

DC 9-35V

BLUE

BLACK

GND

GREEN

485-

YELLOW

485+

Electrical connections

Cable color

Function

BWM 410

Voltage Single-Axis Inclinometer

RED

GREEN

YELLOW

BLACK

Output

ground

BROWN

GRAY

U XOUT

Electrical interfaces

RED

VCC

DC 12-35V

Cable color

Function

GRAY

Output

ground

BLACK

GND

GREEN

RS232 RXD

YELLOW

RS232 TXD

U XOUT

BROWN

12-35V

RXD

TXD

GND

Sensor

POWER+ POWER-

YELLOW: TXD

RED DC 12-35V 1

POWER

GREEN: RXD

BLACK: GND

12~35V

Bewis Sensing Technology LLC

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

Debug software

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

more convenient and intuitive PC software.

BWM410 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.

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 direction will be displayed on the screen.

Software use steps:

Note: You can switch to Chinese or English version by the bottom left button.

BWM 410

Voltage Single-Axis Inclinometer

Bewis Sensing Technology LLC

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

(nbyte)

Protocol

1Data Frame Format：

Data Format: Hexadecimal

Identifier: Fixed to 77

Frame Length: Length from Frame Length to Checksum（included）

Address Code: Address of acquiring module, default 0x00

Data: Content and length variable according to Command

Checksum: Sum of Frame Length, Address Code, Command and Data. (Please pay attention that

when the command or data changes, the checksum will change. )

（8 data bits，1 stop bit，No parity check，default baud rate 9600）

Identifier

(1byte)

0x77

Frame Length

（1byte）

Address Code

（1byte） Command

（1byte） Data Checksum

（1byte）

BWM 410

Voltage Single-Axis Inclinometer

2 Command Format:

2.1 Read angle of X axis Command：77 04 00 01 05

0x77 0x01

Command response：

0x77 0x81 SXXX.YY

Note: Data represents 3 byte angle value in format of compressed BCD code. S is the sign bit (0 positive, 1

negative), XXX is the three digit integer part, YY is the fractional part. For example, 102770 means -027.7 °,

013532 means +135.32°.

The address code is initially 00. If the address is changed to 01, the read angle command is: 77 04 01 01 06 (06 is

the checksum).

0x77

Command response：

2.2 Set address Command: 77 05 00 0F 01 15

0x0F

0x77 0x8F 0x00: success

0xFF: failure

XX Address

0x07

Identifier

(1byte) Frame Length

（1byte）

Address Code

（1byte）

Command

（1byte）

Data

（0byte） Checksum

（1byte）

Identifier

(1byte)

Frame Length

（1byte）

Address Code

（1byte）

Command

（1byte）

Data

（3byte） Checksum

（1byte）

Identifier

(1byte)

Frame Length

（1byte） Address Code

（1byte）

Command

（1byte） Data

（1byte）

Checksum

（1byte）

Identifier

(1byte)

Frame Length

（1byte）

Address Code

（1byte）

Command

（1byte） Data

（1byte）

Checksum

（1byte）

0x04 0x00

0x00

0x05

0x00

Bewis Sensing Technology LLC

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

BWM 410

Voltage Single-Axis Inclinometer

Command response：

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

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

0x77 0x85 0x00: success

0xFF: failure

0x77

Command response：

2.5 Set baud rate Command：77 05 00 0B 03 13

0x0B

Note：For data, 00: 2400, 01: 4800, 02: 9600, 03: 19200，04: 115200，Default 02:9600.

Note：Set baud rate to 115200 in high speed mode. When the Set baud rate command is executed successfully,

the command response will be return in the original baud rate and then communicate with new baud rate.

0x77 0x8B 0x00: success

0xFF: failure

0x77 0x05

0x00: absolute zero

0x01: relative zero

2.3 Set relative / absolute zero Command：77 05 00 05 00 0A

Identifier

(1byte)

Frame Length

（1byte） Address Code

（1byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

Identifier

(1byte)

Frame Length

（1byte）

Address Code

（1byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

Identifier

（1byte） Frame Length

（1byte）

Address Code

（1byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

Identifier

（1byte）

Frame Length

（1byte） Address Code

（1byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

0x77

Command response：

2.4 Query relative / absolute zero Command：77 04 00 0D 11

0x0D

Identifier

（1byte）

Frame Length

（1byte） Address Code

（1byte） Command

（1byte）

Data

（0byte）

Checksum

（1byte）

0x77 0x8D

0x00: absolute zero

0xFF: relative zero

Identifier

（1byte）

Frame Length

（1byte） Address Code

（1byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

0x05

0x00

0x05

0x04

0x00

0x00 0x11

0x05

0x00

0x00 0x03 0x13

Bewis Sensing Technology LLC

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

BWM 410

Voltage Single-Axis Inclinometer

2.6 Set output mode Command：77 05 00 0C 00 11

0x77 0x0C

0x00: question and answer Mode

0x01: 5Hz Data Rate

0x02: 10Hz Data Rate

0x03: 20Hz Data Rate

0x04: 25Hz Data Rate

0x05: 50Hz Data Rate

0x06: 100Hz Data Rate

0x77

Note: 5Hz Data Rate means that 5 sets of angle data are automatically output every second, and so on.

0x8C 0x00: success

0xFF: failure

Command response：

2.7 Save setting Command：77 04 00 0A 0E

0x77

Note: If Save setting command is not executed, all setting will be invalid after power off.

0x00: success

0xFF: failure

0x77 0x0A

0x8A

0x05

（1byte）

Frame Length

（1byte）

Address Code

（1byte）

Command

（1byte） Data

（1byte） Checksum

（1byte）

Identifier

（1byte）

Frame Length

（1byte）

Address Code

（1byte）

Command

（1byte）

Data

（1byte） Checksum

（1byte）

Identifier

（1byte）Frame Length

（1byte）

Address Code

（1byte） Command

（1byte）

Data

（1byte） Checksum

（1byte）

Identifier

（1byte）

Frame Length

（1byte）

Address Code

（1byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

Note: The default output mode is 00(when setting 100HZ output frequency.

Set baud rate to 115200 in high speed mode.

Command response：

0x05 0x00

0x00

0x040x00

0x00

0x0E

Command response：

0x1F

0x77 0x1F

2.8 Query address Command：77 04 00 1F 23

Identifier

（1byte）

Frame Length

（1byte）

Address Code

（1byte）

Command

（1byte）

Data

（0byte） Checksum

（1byte）

Identifier

（1byte）

Frame Length

（1byte）

Address Code

（1byte）

Command

（1byte）

Data

（1byte） Checksum

（1byte）

0x04

0x23

0x77

Bewis Sensing Technology LLC

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

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