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Summary of Contents for Lambrecht ARCO-Modbus
- Page 1 USER MANUAL ARCO-Modbus Wind Sensor...
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Page 2: Table Of Contents
LAMBRECHT meteo | ARCO-Modbus Contents Features and benefits Warranty Disposal What is the ARCO-Modbus? Start-up 5.1 Installation conditions 5.2 Tools and installation material 5.3 Unpacking the sensor 5.4 Incoming goods inspection 5.5 Power supply 5.6 Mounting the cup rotor and wind vane 5.7 Installation work (short description) 5.8 Mounting the sensor 5.9 Alignment of wind vane Power and signal connection Safety regulations Maintenance 8.1 Regular maintenance and calibration 8.2 Visual check and cleaning Transport Dimensional drawing Connection diagram Modbus data protocols 12.1 General 12.2... -
Page 3: Features And Benefits
Warranty Please note the loss of warranty and non-liability by unauthorized manipulation of the system. You need a written permission of the LAMBRECHT meteo GmbH for changes of system components. These activities must be operated by a qualified technician. The warranty does not cover: Mechanical damages caused by external impacts (e. g. icefall, rockfall, vandalism). -
Page 4: What Is The Arco-Modbus
LAMBRECHT meteo | ARCO-Modbus What is the ARCO-Modbus? The sensors of the ARCO series are very robust, compact and extremely reliable. When developing these sensors particular consideration has been given to the fulfillment of meteorological requirements. The system acquires the horizontal air flow and processes the measuring data to the meteorological parameters wind speed and wind direction. The sensors and further system components are mounted in a splash water resistant and dust-proof metal housing. The measured data are output via a galvanically isolated RS485 interface via Modbus RTU after switching on the supply voltage. Due to their shock and vibration proof construction the sensors ARCO-Modbus are particularly qualified for use under severe environmental conditions. The housing and the measuring elements are made of seawater resistant aluminum alloys. The housing, the cup rotor and the wind vane are anodized. An electronically controlled sensor heating device allows for operation of the sensor over the wide range of -30...70 °C. Start-up Wind can be represented by a vector quantity. For a complete description of the wind it is necessary to specify its speed and direction. The two components are subject to spatial and temporal variations; thus, strictly speaking, the values are only valid for the site where the measuring instrument is installed. We therefore recommend selecting the place of installation very carefully. 5.1 Installation conditions For professional wind measurements the location and height of the wind sensor are important for accurate, correct results and representative wind conditions. Ideally, the sensor should be installed 10 m above the ground on a mast. There should also be nothing affecting wind flow within a radius of 150 m around the sensor. This may be buildings, trees, tall towers, lifting cranes, moving vehicles, aircrafts, helicopters or other obstructions. In the case of mobile measurements on vehicles often the above mentioned conditions are not practicable. Then you have to find compromises. Generally, wind measuring instruments should not measure the specific wind conditions of a limited area, but indicate the typical wind conditions of a wider area. The values measured at different places must be comparable. Thus, when installing the sensor you should make sure the place of installation is not under the lee of great obstacles. The distance between the obstacles and the sensor should be 10 times the height of the obstacles (this corresponds to the definition of an undisturbed terrain). If an undisturbed terrain of this kind does not exist, the sensor must be put up at a height of at least 5 m above the obstacle height. If the sensor must be installed on a roof top, the place of installation must be in the middle of the roof to avoid predominant wind directions. If you want to measure both wind direction and wind speed, if possible, the sensors should be mounted at the same measuring point, with any mutual interference of the sensors being avoided. The sensor ARCO-Modbus meets this requirement. The sensor must not be installed on to, or close to, transmitting plants or antennas. A minimum distance of 2 m is to be kept for interference-free signal transfer. -
Page 5: Tools And Installation Material
LAMBRECHT meteo | ARCO-Modbus 5.2 Tools and installation material There are no special tools or materials required for installation or maintenance. All work can be carried out with standard tools available in a regular workshop. 5.3 Unpacking the sensor The sensor is packed in a separate box, carefully protected against mechanical influences, in order to avoid damage during transport. When securely installed, the sensor can withstand shock and vibration, which normally occurs on ships. Please verify that the following parts and documents are enclosed: • 1 sensor ARCO-Modbus • 1 user manual Accessories: Dependant on order size, always separately packed) 5.4 Incoming goods inspection Please thoroughly check the delivery with regard to completeness and eventual transport damages. In case of eventual claims please contact us in writing immediately. 5.5 Power supply The sensor requires at the input connector a 24 volt nominal DC power source for operation. The sensor heating has a power consumption of 2·9 W. 5.6 Mounting the cup rotor and wind vane The drill holes on the cup rotor are arranged in such a way that it can only be mounted in a specific, unambiguous position. All screws have to be used and the cup rotor or the wind vane have to be fixed with them. This ensures the correct direction of rotation. The required Allen key is included in the scope of delivery. The wind vane can only be mounted in a specific position. Use all two screws to attach the wind vane to the sensor head. This is the only way to ensure a correct measurement of the wind direction. aem.eco page –... -
Page 6: Installation Work (Short Description)
LAMBRECHT meteo | ARCO-Modbus MOUNTING THE CUP ROTOR MOUNTING THE WIND VANE Schraube mit Innensechskant Halbrundschraube mit Innensechskant screw with hexagon socket round head screw with hexagon socket M3x12 DIN7380 M3x8 DIN7380 Windfahne / wind vane Schalenstern / cup rotor... -
Page 7: Power And Signal Connection
LAMBRECHT meteo | ARCO-Modbus You have to turn the marking on the wind vane so that it is exactly over the marking on the sensor shaft. Fix the position of the wind vane with, for example, a piece of adhesive tape. After alignment the adhesive tape has to be removed. When you have fixed the wind vane you can locate the reference point by aiming at it over the axis. Now you must turn the sensor casing on the mounting tube until the tip of the wind vane points to the reference point in the north. To set up the sensor’s north orientation select a landmark which is as far as possible up north with regard to the final position of the wind direction sensor. The reference point can be selected using a topographical map (1:25000). The exact position of the reference point is determined using an amplitude compass that can be adjusted horizontally on a stand. The compass declination has to be considered! A functional check at three points offset by 90° directions is recommended. Follow all safety instructions while setting up the sensor on to a mast. Power and signal connection If the sensor is mounted in the correct manner and connected with the right cable (accessory), you can attach the wires for the power supply and signal outputs to the data acquisition equipment (computer). The ARCO-Modbus sensor requires a 4-pole M12 plug connector. The cable shield should be connected with both ends at the ground wire (PE). To reduce the risk of inductive interference the sensor must be properly grounded (screening on both sides). The external connection is carried out via a central connector which is located in the housing base. For further details about the electrical connection please see section "Electrical connection“. The typical power supply of the sensors is 24 VDC with a current consumption of max. 920 mA (incl. heating). The input voltage range can be 20...28 VDC. The heating of the ARCO-Modbus has a heating power of 2·9 W. Under most climatological conditions the heating prevents blocking of the moving sensor parts. Neither the cup rotor nor the wind vane are heated. In the case of icing or formation of ice on the moving sensor element the function is restricted for the period of icing. The output signal of the sensor conforms to the Modbus RTU to RS485 standard. Safety regulations Because the wind sensor is often mounted in exposed locations at dangerous heights the installation personnel have to pay attention to the relevant safety regulations. During the electrical installation work the external circuitbreaker must be switched off. It is not permitted for unauthorized persons to open the housing! aem.eco page –... -
Page 8: Maintenance
LAMBRECHT meteo | ARCO-Modbus Maintenance 8.1 Regular maintenance and calibration The sensors are very low-maintenance and designed for a very long lifetime. Regular visual checks are recommended, regarding dirt build-up on the surface caused by the weather. Whenever this is the case, we strongly recommend that you clean it. A regular visual and functional check of the wind sensor is recommended. If reference measurements are necessary, it must be stringently noted that a comparison of the measured values is given only if the measurements take place under same conditions. I.e. the reference equipment must be used very close to the sensor! The sensor is a measuring instrument and thus user specific standards apply regarding the period of recalibration. Manufacturer's recommendation: 2 years. For the long-term assurance of the function and accuracy of the proposed components, we are pleased to offer you our professional maintenance and calibration services. 8.2 Visual check and cleaning The use of the sensor under the respective environmental conditions requires certain actions. It is thus recommendable to clean the outside of the housing and shelter within specific intervals. The intervals are dependent on the environmental conditions and the degree of soiling. We recommend a regular visual and functional check. In case you should be faced with any specific problems, which you are unable to solve, please contact the LAMBRECHT meteo service: Tel: +49-(0)551-4958-0 E-mail: support@lambrecht.net Transport In case it is necessary for you to ship or transport the sensor, it must be carefully packed to prevent damages during transport. page – aem.eco... -
Page 9: Dimensional Drawing
LAMBRECHT meteo | ARCO-Modbus 10 Dimensional drawing aem.eco page –... -
Page 10: Connection Diagram
LAMBRECHT meteo | ARCO-Modbus Connection diagram page – aem.eco... -
Page 11: Modbus Data Protocols
LAMBRECHT meteo | ARCO-Modbus 12 Modbus data protocols 12.1 General The Lambrecht meteo Modbus sensors follow the specification of the Modbus organization: “MODBUS APPLICATION PROTOCOL SPECIFICATION V1.1b3” (see www.modbus.org). 12.2 Data encoding MODBUS uses the “Big-Endian” format for addresses and data. This means that if a value is transmitted with a number format which is larger than a single byte, that the “most significant byte” is sent first. Example Big-Endian: Register size value 16 - bits 0x1234 is transmitted in the sequence: 0x12 0x34. To obtain the real measuring value, divide the received register value by the divisor. Values of -9999 indicate an internal sensor error. 12.3 Standard configuration - Default Baud rate: 19200 Baud Byte frame: 8E1 (1 start bit, 8 data bits, 1 parity bit (even parity), 1 stop bit) RTU Sensor address: DEFAULT ADDRESSES OF THE L AMBRECHT SENSORS Address Sensor Wind speed Wind direction Precipitation rain[e] EOLOS IND · u[sonic]WS6 com[b] PREOS ARCO... -
Page 12: Available Modbus Commands
LAMBRECHT meteo | ARCO-Modbus 12.4 Available Modbus commands The LAMBRECHT Modbus sensors support the following commands: • “Read Holding Register” command: 0x03 (descriptive sensor data registers) • “Read Input Register” command: 0x04 measured value register (each value must be requested individually) • “Write Multiple Register” command: 0x10 (write to configuration registers) 12.5 Instantaneous values / Real-time values (Input register) The following measured values are provided: Register address Parameter name Unit Divisor Quantity of registers Access type 30001 Wind speed Read only 30201 Wind direction ° Read only 30401 Air temperature °C... -
Page 13: Descriptive Sensor Parameter Registers (Holding Register)
LAMBRECHT meteo | ARCO-Modbus The data are valid for the period between the current request and the previous request. The maximum range of a period is 1 hour. Recalling the average value of a minimum, maximum and average group will erase the appropriate registers. Retrieve the values of a group in the sequence minimum, maximum, average. Use command: 0x03 Example: Retrieve wind speed (min. max. avr.) and erase the register content Transmission Source Dest Function Func Desk Checksum Query => Master Slave 1 Read Input Register (4) Address=30004, Quantity of Register=1... -
Page 14: Configuration Registers (Holding Register)
LAMBRECHT meteo | ARCO-Modbus Example: Retrieve the device identification number (The identification number shown in the example is sensor-dependent. It is only used here for demonstration purposes). 00.16480.000130 Transmission Source Dest Function Func Desk Checksum Query => Master Slave 13 Read Holding Register (3) Address=40050, Quantity of Register=8 OK:8BCA Transmission Source Dest Function Func Desk Data Checksum Response <= Slave 13... -
Page 15: Technical Data
LAMBRECHT meteo | ARCO-Modbus 14 Technical data ARCO-Modbus 00.14581.030430 Range of application Temperature :-40...+70 °C heated *; wind speed: 0...80 m/s; rel. humidity: 0...100% r. h. Interface RS485 Protocol Modbus RTU Supply voltage sensor 20...28 VDC/ max. 920 mA at 24 VDC incl. heating 24 VDC/ 2·9 W Housing seawater-resistant aluminum; specially coated; IP 65 in vertical operating position Dimensions see dimensional drawing Weight approx. 1,7 kg Standards • EMC/EMI: EN 60945 • Low voltage guideline 73/23/EWG and VDE 0100 • WMO No. 8 • VDI 3786 Part 2 • NMEA 0183 PARAMETER WIND DIRECTION Measuring range 0...360°...
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