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SEVEN 3S-WD Wind Direction Sensor User Manual

Brand: SEVEN Sensor Solutions

1. Introduction

The Wind Direction Sensor is part of the SEVEN meteorological sensor range, which includes professional and intelligent measuring sensors with a digital or analog interface for environmental and industrial applications such as PV plants.

Visual Description: The sensor features a silver-colored body with a vane and cups, mounted on a cylindrical base. The SEVEN Sensor Solutions logo is present.

It is a measuring transmitter used for the measurement of the horizontal wind direction. The measured data is transmitted as analog or digital output signals to data loggers and receiver units according to input requirements.

SEVEN products utilize reliable and high-quality components for accurate meteorological information in environmental and industrial applications, specifically designed for PV plant monitoring systems.

Note: SEVEN reserves the right to make changes in this entire document without prior notice.

Models

  • 3S-WD: Small and economical wind direction sensors with magnetic field output. Ideal measurement transmitters with the best price/performance ratio for standard industrial and environmental applications, including PV plants.
  • 3S-WD-I: Wind direction sensors with analog output, specially designed for advanced industrial applications and environmental conditions. Housings are made of seawater resistant alloy aluminum, ensuring extreme durability and resistance.
  • 3S-WD-MB: Professional and intelligent measuring sensors with a digital interface for environmental and industrial applications like PV plants. The measured value can be transmitted to monitoring instruments, data loggers, and other receiving units via the serial RS485 interface with MODBUS RTU protocol.

2. Wind Direction Sensor Installation

It is suggested that the system be operated at ground level to ensure all components are working properly prior to installation. A general diagram of the installation steps is provided.

Visual Description: An installation process flowchart shows the steps: Start -> Unpacking and Control -> Deciding Where to Install -> Preparation of Materials -> Settings Configuration -> Electrical Connection -> End.

2.1. Unpacking and Control

Upon receipt, carefully check if the package content is complete. Contact Seven Sensor Solutions if any components are missing, damaged, or defective.

Visual Description: The packing list shows the Wind Direction Sensor (Qty: 1) and M5x12 Six Corner Head Bolts (Qty: 3).

Note: Quantity and content of the received material may differ based on customer confirmed order.

2.2. Site Requirements and Considerations

Each site presents unique challenges. The installation may vary. First, decide where the product will be installed. The Wind Direction Sensor can be affected by obstructions and local topography.

The Wind Direction Sensor should be placed no closer than 10 times the height of any obstruction.

Visual Description: A diagram illustrates site selection, showing a tree, a brick wall, and a building as potential obstructions. Arrows indicate the sensor should be positioned at a minimum distance of 10 times the height (10H) from these obstructions.

2.3. Preparation of Materials to be Used in Installation

SEVEN provides necessary materials. The user should prepare hand tools and personal protective equipment.

Visual Description: Images display the following materials: Gloves, Meter (measuring tape), Drill, 10-11 Wrench, Spirit Level, and Digital Compass.

2.4. Installation

The 3S-WD Wind Direction Sensor is designed with a Plug & Run principle. Installation can be easily completed by a qualified electrician following SEVEN instructions.

Pipe Mounting

Visual Description: Three steps are shown for pipe mounting.

  1. First Step: Place the Wind Direction Sensor parallel to the pipe.
  2. Second Step: Screw the M5 bolt into the holes on the sides of the sensor.
  3. Third Step: Tighten the bolt with an 8-9 mm wrench. Ensure the pipe is fixed on a flat surface.

Sheet Metal Mounting

Visual Description: Three steps are shown for sheet metal mounting.

  1. First Step: Ensure the mounting area is level and parallel to the ground.
  2. Second Step: Install using three M5x12 bolts.
  3. Third Step: Tighten the bolts using an 8-9 mm wrench.

2.5. Inspection and Maintenance

Periodically check fastener tightness, cable conditions, look for damage, deterioration, or disconnection of sensors and electrical enclosures, evidence of moisture or vermin, loose wiring connections, and embrittlement of attachments.

Note: We recommend using thread-locking fluid for fasteners.

According to IEC 61724-1:2021, the monitoring system should be inspected at least annually, or preferably at more frequent intervals.

3. Connections

The supply voltage for the Wind Direction Sensors is 12 - 30 V DC, with 24 V recommended.

The communication and power cables of the Wind Direction Sensor should always be laid separately from AC/DC cables.

Note: The installation and electrical connections of SEVEN sensors should be carried out by a qualified electrician.

3.1. Wind Direction Sensor (3S-WD-MB)

The 3S-WD-MB Wind Direction Sensor features an electrically isolated, half-duplex, 2-wire RS485 interface for configuration, communication, and firmware updates.

Wire Assignment for Power & Communication:

  • RS485 A / Data (+): Green
  • RS485 B / Data (-): Yellow
  • Positive Supply Voltage: Brown
  • Supply Voltage Ground: White

Visual Description: A diagram shows the wire connections: Green (RS485 A/Data (+)) and Yellow (RS485 B/Data (-)) connecting to a Datalogger, while Brown (V+) and White (V-) connect to the Power Supply.

3.2. 4-20 mA Wind Direction Sensor (3S-WD-I)

Wire Assignment for Power & Communication:

  • 4-20 mA (+): Green
  • 4-20 mA (-): Yellow
  • Positive Supply Voltage: Brown
  • Supply Voltage Ground: White

Visual Description: A diagram shows the wire connections: Green (4-20 mA (+)) and Yellow (4-20 mA (-)) connecting to a Datalogger, while Brown (V+) and White (V-) connect to the Power Supply.

Running Parameter Configuration (for datalogger):

Running ParameterValue
Lower Threshold0°
Upper Threshold359°
Start mA4 mA
End mA20 mA

4. Configuration and Communication

Once the Wind Direction Sensor is installed and connected correctly, it begins to take measurements autonomously.

Attention must be paid to the following points:

  • A measurement request should be made to the Wind Direction Sensor using the 3S-WD Configuration Tool to verify correct operation on site.
  • The Wind Direction Sensor must be aligned to the North to ensure accurate wind measurement data.
  • If multiple Modbus Devices are operated on a network, a unique device ID must be assigned to each device.

Note: The 3S-WD Configuration Tool is used for the 3S-WD-MB model. The 3S-WD-I model does not require configuration.

Follow SEVEN instructions to configure the Wind Direction Sensor on dataloggers.

4.1. 3S-WD Configuration Tool

The 3S-WD Configuration Tool is software for testing communication and adjusting Modbus parameters on the Wind Direction Sensor. It can also be used to update the sensor's firmware.

A Windows® PC with a serial bus interface (set as a COM port), the 3S-WD Configuration Tool software, and a USB to RS485 Converter are required for configuration and testing.

Download and install the software from: https://www.sevensensor.com/files/d/s/3S-WD-Configuration_Tool.zip

4.2. Modbus RTU Specifications

4.2.1. Supported Bus Protocol

The Wind Direction Sensor uses an RS-485 communication port supporting Modbus RTU commands. It can be configured with different communication parameters.

ParameterSupported Values
Baud Rate1200, 2400, 9600, 19200, 38400
ParityNone, Even, Odd
Stop Bit1, 2 (only at None parity)
Factory Default9600 Baud, 8N1, address: 1

4.2.2. Supported Function Codes

The Wind Direction Sensor supports a subset of Modbus RTU commands.

Function CodeDescription
0x03Read Holding Registers
0x04Read Input Registers
0x46Read & Change Parameters
0x08Diagnostics

Note: All Modbus protocol checksums are omitted but must be calculated and sent during communication.

4.2.2.1. Read Holding Registers (0x03)

Master Request:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x03
Start Register2 Byte (Big Endian)See register table below
End Register2 Byte (Big Endian)See register table below

Slave Response:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x03
Number of Bytes1 Byte0 to 255 (2xN) N = Number of Registers
Data2 Byte x N (Big Endian)See register table below

Holding Register Map (based on SunSpec Alliance standards):

StartEndValueTypeUnitsScale FactorConstant
4000040001SunSpec IDuint32N/AN/A"SunS"
4000240002SunSpec Device IDuint16N/AN/A0x0001
4000340003SunSpec Lengthuint16RegistersN/A65
4000440019ManufacturerString (32)N/AN/A"SevenSensor"
4002040035ModelString (32)N/AN/A"3S-WD"
4003640043Hardware VersionString (16)N/AN/A"1.1"
4004440051Software VersionString (16)N/AN/A"2.0"
4005240067Serial NumberString (32)N/AN/A"23.12.345.65.0013"
4006840068Device IDuint16N/AN/A1
4007540075Wind Directionint16Measured13
4010040100End of SunSpec Blockuint16RegistersN/A0xFFFF
4010140101Lengthuint16Registers00
4019940199Modbus ID - Write Registeruint16Device Address Read/Write RegisterN/A1

4.2.2.2. Read Input Registers (0x04)

Master Request:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x04
Start Register2 Byte (Big Endian)See register table below
End Register2 Byte (Big Endian)See register table below

Slave Response:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x04
Number of Bytes1 Byte0 to 255 (2xN) N = Number of Registers
Data2 Byte x N (Big Endian)See register table below

Input Register Map:

A common input register map is created for all SEVEN Modbus devices. Data marked in bold are defined for Wind Direction Sensor.

ID-DecID-HexValueRangeResolution
300190x13Wind Direction0...359°1

Additionally, internal data marked in bold can be read individually or in blocks:

ID-DecID-HexValueRange
300600x3CHardware VersionManufacturer Parameters Read Only
300610x3DSoftware VersionManufacturer Parameters Read Only
301170x75Wind Direction Enable SelectionManufacturer Parameters Read Only

Note: Values marked as "raw data" are for information only and should not be used for serial applications.

4.2.2.3. Read & Change Parameters (0x46)

Sub Function (0x04): Write Device Address

Master Request:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x46
Sub Function Code1 Byte0x04
New Address1 Byte1 to 247

Slave Response:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x46
Sub Function Code1 Byte0x04
New Address1 Byte1 to 247

Sub Function (0x06): Write Communication Parameters

Master Request:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x46
Sub Function Code1 Byte0x06
New Baud Rate1 Byte0 to 3, see table below
New Parity / Stop Bit1 Byte0 to 3, see table below

Slave Response:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x46
Sub Function Code1 Byte0x06
New Baud Rate1 Byte0 to 3, see table below
New Parity / Stop Bit1 Byte0 to 3, see table below

Note: When the "Write Communication Parameters" command is used, the "Write Device Address" command must also be used before the restart communication command.

Communication Parameter Settings

Parameter changes take effect after sensor restart (power on reset or restart communication command).

Baud RateValueParity / Stop BitValue
12001None/11
24002None/22
96003Odd3
192004Even4
384005Even5

Sub Function (0x07): Read Hardware & Software Versions

Master Request:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x46
Sub Function Code1 Byte0x07

Slave Response:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x46
Sub Function Code1 Byte0x07
Hardware Version2 Byte (Little Endian)0 to 65535
Software Version2 Byte (Little Endian)0 to 65535

Sub Function (0x08): Read Serial Number - Production Date - Calibration Date

Master Request:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x46
Sub Function Code1 Byte0x08

Slave Response:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x46
Sub Function Code1 Byte0x08

4.2.2.4. Diagnostics (Restart Command) (0x08)

Master Request:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x08
Restart Code4 Byte0x00000000

Slave Response:

FieldSizeValue
Address1 Byte1 to 247
Function Code1 Byte0x08
Restart Code4 Byte0x00000000

5. Additional Documents and Software

The following documents and software can be downloaded from www.sevensensor.com or requested from SEVEN Sensor Solutions:

  • User Manual: This document
  • Datasheet: Wind Direction Sensor Brochure
  • 3S-WD Configuration Tool: Windows® software for testing, firmware updates, and configuration of the device
  • Firmware: Current device firmware

6. Contact Details

Please feel free to contact SEVEN Sensor Solutions if you face any difficulties during installation or configuration.

  • Address: Pinarcay OSB Mahallesi Organize Sanayi Tesisleri Teknokent Idare Binasi No: 7, D:1, 19100 Merkez / Corum / Turkey
  • Phone: +90 530 889 8019
  • Email: sales@sevensensor.com
  • Website: www.sevensensor.com
Models: 3S-WD-I, 3S-WD Wind Direction Sensor, 3S-WD, Wind Direction Sensor, Direction Sensor, Sensor

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3S-WD User Manual

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