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Summary of Contents for WiT WT901C
- Page 1 USER MANUAL WT901C(RS485) Inclinometer Sensor WT901C RS485 | manual v23-0213 | www.wit-motion.com - 1 -...
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Page 2: Contact
Application ● AGV Truck ● Platform Stability ● Auto Safety System ● 3D Virtual Reality ● Industrial Control ● Robot ● Car Navigation ● UAV ● Truck-mounted Satellite Antenna Equipment WT901C RS485 | manual v23-0213 | www.wit-motion.com - 2 -... -
Page 3: Table Of Contents
3.4.2 Standby and Wake Up ........... - 24 - 3.4.3 Placement Direction ..........- 25 - 3.4.4 Data Recording ............. - 26 - 3.4.5 Data Playback ............- 28 - 3.4.6 Bandwidth ............- 30 - WT901C RS485 | manual v23-0213 | www.wit-motion.com - 3 -... - Page 4 3.4.8 6-axis/ 9-axis Algorithm ........- 33 - 3.4.9 Set MODBUS Address ..........- 34 - Multiple Module Cascades ............. - 35 - Software Operation ............. - 37 - Sample Code ..............- 38 - WT901C RS485 | manual v23-0213 | www.wit-motion.com - 4 -...
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Page 5: Introduction
1 Introduction The WT901C is a multi-sensor device detecting acceleration, angular velocity, angle as well as magnetic filed. The small outline makes it perfectly suitable for industrial retrofit applications such as condition monitoring and predictive maintenance. Configuring the device enables the customer to address a broad variety of use cases by interpreting the sensor data by smart algorithms. -
Page 6: Warning Statement
For proper instrument grounding: use WITMOTION with its original factory-made cable or accessories. For secondary developing project or integration: use WITMOTION with its compiled sample code. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 6 -... -
Page 7: Instructions Of 2023 New Software
Below is the new software and universal instruction download link. https://drive.google.com/drive/folders/1dnwmnH7mi4zBpNqDywLz rzsV7BfeKaD9?usp=share_link Note: The 2022 old version software will be reserved for use. You can check “Chapter 3 Use Instructions with PC” for more details. ↓↓↓ WT901C RS485 | manual v23-0213 | www.wit-motion.com - 7 -... -
Page 8: Use Instructions With Pc
PC software is only compatible with Windows system. WT901C RS485 Playlist 3.1.1 Serial Connection Step 1. Connect the sensor with a serial converter PIN Connection: VCC - 5-36V GND - GND (VCC 5-36V is recommended for connection) WT901C RS485 | manual v23-0213 | www.wit-motion.com - 8 -... - Page 9 Step 2. Unzip the software and install the driver CH340 https://drive.google.com/file/d/1I3hl9Thsj9aXfG6U-cQLpV9hC3bVEH2V/view ?usp=sharing *How to Install and update the CH340 driver Click the "Uninstall" button first. Then click on the "Install" button. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 9 -...
- Page 10 2）After opening the device manager, you will need to open the Ports (COM & LPT) tree. The CH340 should show up as USB-SERIAL CH340 (COM##). Depending on your computer, the COM port may show up as a different number. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 10 -...
- Page 11 Step 3. Open the software(Minimu.exe) Data will appear after auto-search finishes Notice: If not successful, please operate manually Choose the com port and baud rate 9600, data will be shown on the software. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 11 -...
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Page 12: Software Introduction
(Old version software instruction) Software Introduction Link to download software 3.2.1 Main Menu WT901C RS485 | manual v23-0213 | www.wit-motion.com - 12 -... - Page 13 For manufacturer internal test only Auto-search Auto searching the sensor Port Com port selection Baud Baud rate selection Type Fixed setting as Modbus for WT901C RS485 Open Open com port Close Close com port WT901C RS485 | manual v23-0213 | www.wit-motion.com - 13 -...
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Page 14: Menu Of Configuration
Menu of Configuration Menu of Configuration Button Function Read Config Reading the current configuration Lock Lock the sensor Unlock Unlock the sensor Calibrate Time Calibration time of chip Save Config Save configuration WT901C RS485 | manual v23-0213 | www.wit-motion.com - 14 -... - Page 15 Reset Z-axis Angle Reset Z-axis angle to 0 degree, not available for WT901C in 9-axis algorithm Angle Reference Setting current angle as 0 degree Gyro Auto Calibrate Auto-calibration of gyroscope WT901C RS485 | manual v23-0213 | www.wit-motion.com - 15 -...
- Page 16 Acceleration measurement range Gyro Gyroscope measurement range Band Width Bandwidth range GPS Time Zone GPS positioning of time zone Menu of Communication Button Function Baud Rate Baud rate selection Device Address 0X50 WT901C RS485 | manual v23-0213 | www.wit-motion.com - 16 -...
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Page 17: Calibration
After calibration, the measurement will be accurate. Methods: Step 1. Keep the module horizontally stationary Step 2. Click the accelerometer calibration Step 3. Click the “Start calibration”and wait for 3 seconds Step 4. Click “Complete Calibration” WT901C RS485 | manual v23-0213 | www.wit-motion.com - 17 -... - Page 18 0, 0,1, the X and Y axis Angle is around 0° . After calibration, the x-y axis Angle is accurate. Note: When putting the module horizontal, there is 1g of gravitational acceleration on the Z-axis. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 18 -...
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Page 19: Magnetic Field Calibration
Sensors should be 20CM away from magnetic and iron and other materials Methods: Step 1. Open the Config menu Step 2. Click the magnetic field calibration button. click the “Start calibration” WT901C RS485 | manual v23-0213 | www.wit-motion.com - 19 -... - Page 20 Step 4. After rotation, click “End calibration” Successful result: Most of data dots will be within the ellipse. If not successful, please stay away from the objective that can create magnetic field interference. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 20 -...
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Page 21: Gyroscope Automatic Calibration
The gyroscope calibration is to calibrate the angular velocity, and the sensor will calibrate automatically. It is recommended that the automatic calibration of gyroscopes can be inactivated only if the module rotates at a constant speed. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 21 -... -
Page 22: Reset Z-Axis Angle
Z axis backs to 0 degree in the module data bar. 3.3.5 Reset Height to 0 Only available for the module built-in barometer like WT901B, HWT901B, WTGAHRS1, WTGAHRS2. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 22 -... -
Page 23: Configuration
Note: After the change, the module will no longer output data at the original baud rate. The data will be output only when the baud rate that has been changed is selected on the PC software again. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 23 -... -
Page 24: Standby And Wake Up
Wake up: The module enters the working state from the standby state. The module defaults to a working state, in the“Config”of the software, click “Sleep”option to enter the sleep state, click“Sleep”again to release sleep. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 24 -... -
Page 25: Placement Direction
Step 1: Rotate the module 90 degrees around the X-axis Step 2: Place the sensor 90 degrees vertically Step 3: Click “Vertical” as install directions on “Config” menu WT901C RS485 | manual v23-0213 | www.wit-motion.com - 25 -... -
Page 26: Data Recording
3.4.4 Data Recording Method are as follows: Step 1: Click “Record” and “Begin” Step 2: Click “Stop” WT901C RS485 | manual v23-0213 | www.wit-motion.com - 26 -... - Page 27 Windows system’s time. The changes in other data is correct. It is highly recommended that data can be pasted to an Excel file. In this way, all data will be shown in order. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 27 -...
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Page 28: Data Playback
Recorded data playback method: Step 1: Disconnect the sensor Step 2: Click “File” Button and then click “Load” Step 3: Choose the original path of software installation and load the Bin file WT901C RS485 | manual v23-0213 | www.wit-motion.com - 28 -... - Page 29 Step 4: Click “Run” and the Binary file will be playback When playback, the rate can be editable. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 29 -...
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Page 30: Bandwidth
1. The higher rate of bandwidth setting will lead to the higher fluctuation in data waveform. Conversely, the lower rate of bandwidth, data will become more fluent. For example: Bandwidth as 20Hz, Output rate as 10Hz. The waveform is very steady. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 30 -... - Page 31 For example, if the bandwidth setting is 20Hz, retrieval rate as 100Hz, there will be 5 repeating data. If you prefer there is no repeating data, it is required to increase the bandwidth more than 100Hz. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 31 -...
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Page 32: Restore Factory Setting
Restore Factory Setting Operation method: Connect the WT901C module and the computer through the USB-RS485 module, click the setting tab, and click to restore the default. After restoring the factory settings, power on the module again. (This method needs to know the... -
Page 33: 6-Axis/ 9-Axis Algorithm
9-axis algorithm: Z-axis angle is mainly calculated and analyzed based on the magnetic field. Z-axis angle will have few drift. The default algorithm of WT901C is 9-axis. If there is magnetic field interference around installed environment, it is recommended to switch to 6-axis algorithm to detect the angle. -
Page 34: Set Modbus Address
“change”. Note: After the change, the modbus address will not be changed immediately, and the device address needs to be searched again to take effect. WT901C RS485 | manual v23-0213 | www.wit-motion.com - 34 -... -
Page 35: Multiple Module Cascades
2. Decrease the baud rate to a lower level due to the data packet missing when BUS cable is too long. Warning Statement: 1. Make sure each sensor powered with enough input voltage 2. Working voltage requires 3.3-5V input WT901C RS485 | manual v23-0213 | www.wit-motion.com - 35 -... - Page 36 3. Hardware Connection Diagram Note: when multiple cascades, check carefully for correct wiring between modules (VCC-VCC A-A B-B GND-GND). WT901C RS485 | manual v23-0213 | www.wit-motion.com - 36 -...
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Page 37: Software Operation
Note: When cascading multiple modules, you must remember the MODBUS address of the module (you can rotate the module to verify whether the data on the PC software is the data of the module). WT901C RS485 | manual v23-0213 | www.wit-motion.com - 37 -... -
Page 38: Sample Code
5 Sample Code Link to download all sample code WT901C RS485 | manual v23-0213 | www.wit-motion.com - 38 -...
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