BW SENSING BWM410 Series Programming manual

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
Designed by Bewis Sensing Technology LLC, BWM410 is a cost-effective single-axis inclinometer
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: [phone]

2000g,0.5ms,3times/axis
225g(Includes standard 1.5m cable, no box)
Conditions
Indoor
BWM410
0~±180
X
0.05
0.001
±0.005
100
according to GBT17626
≥100 MΩ
≥30000 hours/time
°
°
°/℃
Hz
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
12
20
10
-40
-55
Typical
50
Max
35
60
20
+85
+100
Units
V
mA
KΩ
nF
℃
℃
Conditions
Non-loaded
Resistivity
Capacitive
25
25
Full scale output
voltage 0-5V/0-10V optional
Bewis Sensing Technology LLC
www.bwsensing.com Tel: [phone]

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
30
41
47
36
Package size
Product Size: L90*W40.5*H26(mm)
90
78
29
40.5
4
11 26
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: [phone]

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
AB
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: [phone]

RS232 Electrical interfaces
RED
1
VCC
DC 9-35V
BLUE
2
NC
BLACK
3
GND
GREEN
4
B
485-
YELLOW
5
A
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
1
VCC
DC 12-35V
Cable color
&
Function
GRAY
3
Output
ground
BLACK
4
GND
GREEN
5
RS232 RXD
YELLOW
8
RS232 TXD
10
U XOUT
BROWN
12-35V
RXD
TXD
GND
1
5
4
3
Sensor
POWER+ POWER-
YELLOW: TXD
RED DC 12-35V 1
6
7
8
9
3
2
4
5
POWER
GREEN: RXD
BLACK: GND
12~35V
12
3
4
5
67
Bewis Sensing Technology LLC
www.bwsensing.com Tel: [phone]

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: [phone]

(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
0x05
0x00
0x00
Bewis Sensing Technology LLC
www.bwsensing.com Tel: [phone]

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
0x05
0x00
0x00
0x05
0x04
0x00
0x00 0x11
0x05
0x05
0x00
0x00 0x03 0x13
Bewis Sensing Technology LLC
www.bwsensing.com Tel: [phone]

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
0x05
（1byte）
Frame Length
（1byte）
Address Code
（1byte）
Command
（1byte） Data
（1byte） Checksum
（1byte）
Identifier
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: [phone]

Ordering Information
Executive standard
●Enterprise Quality System Standard: ISO9001:2008 Standard (Certificate No.:10114Q16846ROS)
●CE certification (certificate number: 3854210814)
●ROHS (certificate number: SO81426003)
●GB/T 191 SJ 20873-2003 General specifications for tiltmeters and spirit levels
●GBT 18459-2001 sensor main static performance index calculation method
●JF 1059-1999 Evaluation and Expression of Measurement Uncertainty
●GBT 14412-2005 mechanical vibration and shock mechanical installation of accelerometer
●General requirements for GJB 450A-2004 equipment reliability
●Quality control of key parts and important parts of GJB 909A
●GJB 899 Reliability Qualification and Acceptance Test
●GJB 150-3A high temperature test
●GJB 150-4A low temperature test
●GJB 150-8A rain test
●GJB 150-12A dust test
●GJB 150-16A vibration test
●GJB 150-18A impact test
●GJB 150-23A Tilt and Swing Test
●GB/T 17626-3A RF electromagnetic radiation immunity test
●GB/T 17626-5A surge (hit) impulse immunity test
●GB/T 17626-8A power frequency magnetic field immunity test
●GB/T 17626-11A voltage dips, short interruptions and voltage changes immunity
Product number Way of communication Package condition
IP67 Package/Metal Connector
IP67 Package/Metal Connector
BWM 410
Voltage Single-Axis Inclinometer
BWM410-180-05 Voltage/R 2
S 32
BWM410-180-10Voltage/R 2
S 32
Bewis Sensing Technology LLC
www.bwsensing.com Tel: [phone]

BWM410
Serials
Voltage Single-Axis Inclinometer
Wuxi Bewis Sensing Technology LLC
Address: Building 30, No. 58 Xiuxi Road, Binhu District, Wuxi City
Hotline: [phone]
Tel: [phone]-801
Email: [email protected]
Website: www.bwsensing.com