ventus is a seawater-resistant wind meter which in addition to determining wind direction and wind speed is also capable of calculating virtual temperature.

The equipment is connected by way of an 8 pole screw connector.

The measured values can be requested over a variety of interfaces:

- RS485 interface in half or full duplex o UMB binary protocol o UMB ASCII protocol o NMEA protocol o SDI-12 protocol o Modbus-RTU and Modbus-ASCII protocols

- Analog data output of 2 adjustable channels with 4-20 mA, 0 – 10V or (channel 1 only) as frequency 2 – 2000Hz

During commissioning, configuration and measurement polling takes place using the UMB-

Config-Tool (Windows

PC software).

6.1 Wind

The measurement principle implemented for the Ventus-UMB is based on the measurement of the time of flight of ultrasonic pulses in air.

The measurement setup includes two measurement sections, arranged at an angle of 90°, with two ultrasonic transceivers each. The measurement sections are activated in turn and the time of flight of the ultrasonic pulses between the respective transmitter and receiver is measured. Within one measurement cycle each of the ultrasonic heads will work once as transmitter and once as receiver.

Figure 1:

Measurement

Sections

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

ventus

Figure 2: Influence of

Wind on Time of

Flight

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When measuring in still air all times of flight of one cycle will be equal on average.

If however an air flow is passing through the sensor, the ultrasonic pulse packet moving in the direction of the air flow will be accelerated, while the packet moving in opposite direction to the air flow will be decelerated. That means, the time of flight in the direction of wind will be shorter, while that in direction opposite to the wind direction will be longer.

The orthogonal arrangement of the measurement sections allows to evaluate the x and y components (resp. North-south and east-west components) of the air flow.

Basically the sonic velocity, and with it the time of flight of the ultrasonic pulse packets, will be influenced by air temperature and air humidity. The alternating measurement (north-

>south / south->north, west->east / east->west) compensates this influence.

The differences of the time of flight are averaged over a number of measurements, then the wind speed and wind direction is evaluated from the average.

The design of the sensor head protects, to a large extend, the measurement sections against rain and snow. The heating of the sensor prevents icing of the ultrasonic transceivers.

The aerodynamic design of the sensor head minimizes influences on the wind flow.

Remaining deviations are evaluated during device calibration so that they are compensated during the calculation of wind speed and wind direction.

6.2 Virtual Temperature

Due to the physical relationship between the velocity of propagation of sound and the air temperature, the approximate ambient temperature can be determined with the aid of ultrasound sensors.

6.3 Air Pressure

The air pressure is measured by an integrated air pressure sensor

6.4 Heating

Ventus is heated for winter operation.

The measurement section is heated from top and bottom (V200A-UMB: bottom only).

To reduce the maximum operating current of the device, upper and lower heating can be switched alternatingly.

The operating modes of the heating are explained in chapter 12.5.

Separate measurement channels are available for the surveillance of the temperatures of upper and lower heater.

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7 Generation of Measurements

7.1 Current Measurement (act)

In accordance with the specified sampling rate, the value of the last measurement is transmitted when the current measurement value is requested. Each measurement is stored in a circular buffer for the subsequent calculation of minimum, maximum and average values.

7.2 Minimum and Maximum Values (min and max) ventus

When requesting the minimum and maximum values, the corresponding value is calculated

- via the circular buffer at the interval specified in the configuration (1- 60 measurements) - and transmitted.

Note: In the case of wind direction, the minimum / maximum value indicates the direction at which the minimum / maximum wind speed was measured.

7.3 Average Value (avg)

When requesting the average value, this is calculated - via the circular buffer at the interval specified in the configuration (1 - 60 measurements) - and transmitted. In this way moving averages can also be calculated.

7.4 Vectorial Average Value (vct)

In the specific case of wind measurement, measurements are calculated vectorially. To this end, the average values of the vectors are generated internally. Hence the value (wind speed) and angle (wind direction) of the vector are calculated.

Note: On delivery, the interval for the calculation of minimum, maximum and average values is set at 60 measurements. If necessary, this can be adjusted to the particular

requirements with the aid of the UMB-Config-Tool (see page 23).

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8 Measurement Output

The factory default setting for the transmission of measurements is UMB binary protocol.

You can find an example of a measurement request for the various protocols and a complete summary of the list of channels in the Appendix.

8.1 Virtual Air Temperature

Sampling rate 1 – 10 seconds

Generation of average value 1 – 60 measurements

Units

Request channels:

°C; °F act

UMB Channel min max avg Measurement Variable

Measuring Range min max unit

100 120 140 160 Virtual air temperature -50.0 70.0 °C

105 125 145 165 Virtual air temperature -58.0 158.0 °F

Note: In order to transmit the current measurement value the second measurement values are averaged over the sampling rate.

8.2 Heating Temperature

Sampling rate 1 – 10 seconds

Generation of average value 1 – 60 measurements

Units

Request channels:

°C; °F act

112

113

117

118

UMB Channel min max avg Measurement Variable

Heating temperature top

Heating temperature bottom

Heating temperature top

Heating temperature bottom

Measuring Range min max unit

-50.0 150.0 °C

-50.0 150.0

-58.0 302.0

°C

°F

8.3 Air Pressure

Sampling rate 10 seconds

Generation of average value 20 measurements

Units

Request channels: hPa act

300

UMB Channel min max

320 340 avg

360

Measurement Variable

Absolute air pressure

Measuring Range min max unit

300.0 1200.0 hPa

305 325 345 365 Relative air pressure 300.0 1200.0 hPa

Note: For pressure measurement a hardware version equal or greater than 3.0 and a software version equal or greater than 1.6 is necessary!

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8.4 Wind Speed

Sampling rate 250ms; 1 – 10 seconds

Generation of average value 1 – 60 measurements

Generation of maximum value 1 – 60 measurements based on the internal second measurement values

Units

Response threshold

Request channels: m/s; km/h; mph; kts

0.1 m/s (metal) or 0.3 m/s (plastics) act min

UMB Channel max avg vct Measurement Variable

Measuring Range min max unit

400

405

420

425

440

445

460

465

480

485

Wind Speed

75.0 m/s

270.0 km/h

410 430 450 470 490 Wind Speed

Wind Speed

0 167.8 mph

415 435 455 475 495 0 145.8 kts

Note: In order to transmit the current measurement value the second measurement values are averaged over the sampling rate.

8.5 Wind Direction

Sampling rate 250ms; 1 – 10 seconds

Generation of average value 1 – 60 measurements

Generation of maximum value 1 – 60 measurements based on the internal second measurement values Unit °

Response threshold

Request channels:

0.1 m/s (metal) or 0.3 m/s (plastics) act min

UMB Channel max avg vct Measurement Variable

Measuring Range min max unit

500 520 540 580 Wind Direction 0 359.9 °

Note: In order to transmit the current measurement value the second measurement values are averaged over the sampling rate.

The minimum / maximum wind direction indicates the direction at which the minimum / maximum wind speed was measured.

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8.6 Wind Measurement Quality

Sampling rate 250ms; 1 – 10 seconds

Units

Request channels:

% act min

UMB Channel max avg vct Measurement Variable

Measuring Range min max unit

805 Wind measurement quality 0 100 %

Note: The value is updated every 0.25 – 10 seconds and transmits the minimum wind quality of the last measurement.

This value allows the user to assess how well the measurement system is functioning in the respective ambient conditions. In normal circumstances the value is 90 - 100%. Values up to 50% do not represent a general problem. If the value falls towards zero the measuring system is reaching its limits.

If during critical ambient conditions the system is no longer able to conduct reliable measurements, error value 55h (85d) is transmitted for wind speed and wind direction

(device unable to execute valid measurement due to ambient conditions).

8.7 Status Information act min

UMB Channel max avg

4006

4007

4997 vct Measurement Variable

Status supply voltage, lower threshold (~ 20V)

Measuring Range

0 : Voltage >= 20V

1: Voltage < 20V

Status supply voltage, upper threshold (~ 28V)

0 : Voltage <= 28V

1: Voltage > 28V

Status lower heating

Status upper heating

0: Heating off

1: Heating on

0: Heating off

1: Heating on

4998

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9

The sensor bracket is designed to be installed on the top of a mast with a diameter of

50mm or 2”.

The following tools are required for the installation:



Hexagon socket 4.0



Compass for aligning ventus to the North

9.1

Installation

Fastening

Nuts

Mast tube ventus

Figure 3: Fastening to the Mast



Loosen nuts



Push the sensor onto the top of the mast from above



Align the sensor to the North



Tighten both nuts evenly and secure with locking varnish

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ventus

Figure 4: North

Markings

Figure 5: Alignment to North

9.2 North Alignment

Point of reference in the North

Procedure:



If the sensor is already installed, first loosen both nuts evenly until you can turn the sensor easily



Using the compass, identify the North and fix a point of reference on the horizon



Position the sensor in such a way that the South and North sensors are in alignment with the fixed point of reference in the North



Tighten both nuts evenly

Point of reference in the North

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In order for the wind direction to display correctly, the sensor must be aligned to the North.

The sensor has a number of directional arrows and a North drill hole for this purpose. poor good

Note: As the magnetic North Pole indicated by the compass differs from the Geographic

North Pole, account must be taken of the declination (variation) at the location when aligning the sensor.

Depending on the location, the variation can be more than 15° (in North America for example). In Central Europe the variation can be largely ignored at present (< 3°). You can find further helpful information on this subject on the Internet.

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9.3 Selecting the Installation Location

In order to guarantee long service life and correct equipment operation, please pay attention to the following points when selecting the installation location.

9.3.1



General Instructions

Stable subsurface for installing the mast

Free access to the equipment for maintenance works



Reliable power supply for permanent operation



Good network coverage when transmitting over a mobile communications network ventus

Note: The computed measurements specifically apply to the equipment location only. No conclusions can be drawn with regard to the wider environment or a complete road section.

ATTENTION:



Only approved and tested appliances (conductors, risers etc.) should be used to install

the device on the mast.



All relevant regulations for working at this height must be observed.



The mast must be sized and anchored appropriately.



The mast must be earthed in accordance with regulations.



The corresponding safety regulations for working at road side and in the vicinity of the

road carriageway must be observed.

If the equipment is installed incorrectly



It may not function.



It may be permanently damaged.



Danger of injury may exist if the equipment is allowed to fall.

9.3.2



 ventus

Installation at the top of the mast

Installation height at least 2m above the ground

Free field around the sensor

Note: Buildings, bridges, embankments and trees may corrupt the wind measurement.

Equally, passing traffic may cause gusts which may influence the wind measurement.

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

ventus

Figure 6: Installation

Sketch

9.3.3 Installation Sketch min. 10 m

Tree, bush etc. min. 2 m min. 10 m ventus

Mast

Operating Manual V16/05.2016

Road carriageway

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10 Connections

There is an 8 pole screw connector on the underside of the equipment. This serves to connect the supply voltage and interfaces by a connection cable.

Equipment connector:

View on cable socket solder connection ventus

Figure 7:

Connections

Pin assignment full duplex:

Serial interface RXD-

Serial interface TXD-

Control connection

Serial interface RXD+

Serial interface TXD+

Analog ground

Supply voltage -

Supply voltage +

Pin assignment half duplex/analog interface:

Analog interface A

Analog ground

Supply voltage -

Supply voltage +

Serial interface RXD/TXD-

Control connection

Analog interface B

Serial interface RXD/TXD+ pink yellow red grey green blue white brown pink yellow red grey green blue white brown

Pin assignment SDI-12 interface:

SDI-12 Data

SDI-12 activation pink yellow red grey green

SDI-12 GND and SDI-12 activation blue

Supply voltage - white

Supply voltage + brown

(for SDI12 connection please always follow the detailed notes in Chap. 10.7)

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The connection cable screen must NOT be laid to ground in the control panel for

Ventus

! The

Ventus

will be earthed through the screws with the earthed mast .

The connection cable screen MUST be laid to ground in the control panel for V200A !

If the equipment is not connected correctly

- It may not function

- It may be permanently damaged

- The possibility of an electrical shock may exist under certain circumstances

10.1 Supply Voltage

The supply voltage for ventus

is 24V DC ± 10%. The power supply unit used must be approved for operation with equipment of protection class III (SELV).

10.2 RS485 Interface

The equipment has an electrically isolated RS485 interface for configuration, measurement polling and the firmware update.

The RS485 interface is designed as optionally half or full duplex, 2 or 4 wire connection.

The following operating restrictions exist depending on the half or full duplex operation setting:

Full duplex Half duplex

No autonomous telegram transmission possible

Autonomous telegram transmission is possible

Transmission of values via current output is not possible

Heating control via control pin is possible

Transmission of values via current output is possible

Heating control via control pin is possible

Triggering of NMEA telegram transmission over Control-PIN is possible

SDI-12 Mode not possible

Firmware update not possible

Triggering of NMEA telegram transmission over Control-PIN is not possible

SDI-12 Mode possible

Firmware update possible

Restrictions in full and half duplex operation

See page 30 for technical details.

10.3 Analog Interface Circuits

2 analog interface circuits are provided for analog data transmission.

Interface A can be configured for 0 or 4-20mA current output, 0 or 2-10V voltage output as well as for frequency output in the range from 2 – 2000Hz (with adjustable voltage level up to 10V)

Note : For the use of the analog outputs the serial communication protocol must be set to

UMB binary!

Interface B can be configured for 0 or 4-20mA current output and 0 or 2-10V voltage output

The channels to be transmitted by way of these interfaces can be adjusted with the aid of the UMB-Config-Tool. The default values are Channels 400 (current wind speed in m/s (A)) and 500 (current wind direction (B)).

The scaling of the outputs is also adjustable.

The maximum load on the current output is 300



Factory setting

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Operating Manual V16/05.2016 ventus

10.4 Control line

The respective function can be adjusted using the UMB-Config-Tool. The control line can be used either to control heating in half or full duplex operation or to control telegram transmission in full duplex mode. In this case control is possible by means of a volt-free switching contact.

Control line at “high” when control and analog ground are not connected.

Control line at “low” when control and analog ground are short-circuited.

For activation of the SDI12 mode the control line is to be set to “low”, i.e. control input and analog ground are to be connected.

10.4.1 Control line disabled

The control line level has no effect.

10.4.2 Heating control

Heating is disabled when control line is at “high” level, otherwise automatic

Heating is disabled when control line is at “low” level, otherwise automatic

10.4.3 Control of telegram transmission in NMEA protocol

Telegram transmission triggered on rising edge of control voltage

Telegram transmission triggered on falling edge of control voltage

Telegram transmission while control voltage is “high”

Telegram transmission while control voltage is “low”

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Figure 8: Connection to ISOCON-UMB

Operating Manual V16/05.2016

10.5 Connection to ISOCON-UMB (8160.UISO)

Green: RS485 interface A

Yellow: RS485 interface B

Warning: The power supply is not connected to the ISOCON-UMB but is wired directly to the power supply unit, as the ISOCON-UMB is not designed for the 240W heating duty of the ventus device.

Please pay attention to the ISOCON-UMB operating manual when building the equipment.

10.6 Use of surge protector (8379.USP-V)

Please refer to the connection example in the operating manual when using the surge protector (Order no.: 8379.USP).

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10.7 SDI12 Connection

When connecting the sensor to a SDI12 logger two option for the power supply are available:

Power supply through the SDI12 12V line

Power supply from a separate source, isolated from the logger

The must be adapted to the individual power supply option

Supply through the SDI12 BUS ventus

Note: when using this connection option the internal isolation of the ventus

power supply will be bypassed.

Note: the resistor must be mounted at the end of the cable which it is connected to the logger. Otherwise the voltage drop over the cable may cause potential differences which prohibit communication.

Supply from separate source

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11 Commissioning

After the equipment has been installed and connected correctly, the sensor begins autonomously to take measurements. A Windows

PC with serial interface, UMB-Config-

Tool software and interface cable (SUB-D 9 pole; jack - socket; 1:1) are required for configuration and test purposes.

Attention must be paid to the following points:



Check for correct equipment operation on site by carrying out a measurement with the

aid of the UMB-Config-Tool (see page 27).



The device must be aligned to the North in order to ensure correct wind measurement

(see page14).



If several ventus devices are operated on a UMB network, a unique device ID must be

assigned to each device (see page24).

There is no protective cover to remove on the sensor itself.

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12 Configuration and Test

Lufft provides Windows

PC software (UMB-Config-Tool) for configuration purposes. The sensor can also be tested and the firmware updated with the aid of this software.

12.2 Configuration with the UMB-Config-Tool

The operation of the UMB-Config-Tool is described in detail in the operating instructions for the Windows

PC software. For this reason only the menus and functions specific to the ventus

devices are described here.

12.3 Sensor Selection

The ventus

is shown here with sensor selection ventus

(Class ID 8). ventus

12.1 Factory Settings

The ventus device is delivered with the following settings:

Class ID: 8 (cannot be modified)

Device ID:

Baud rate:

1 (gives address 8001h = 28673d)

19200

RS485 protocol: Binary / half duplex

Measurement interval: 10 seconds

Average value generation: 60 measurements

Analog interface:

Analog mode:

Scaling digital:

Scaling analog:

Error current:

Control line:

Heating:

Channels 400 (current wind speed in m/s (A)) and 500 (current wind direction (B))

– 20 mA

0 - 75 m/s and 0° - 359,9°

– 20 mA

2mA

Disabled

Automatic

Note: The device ID must be changed if several ventus

devices are operated on a UMB network, as each device requires a unique ID. It makes sense to start from ID 1 and continue in ascending order.

Figure 9: Sensor

Selection

Note: If the UMB-Config-Tool does not recognize the ventus

sensor type, select the number

‘8’ under ‘Sensor Type’. With ventus connected, click on ‘Update Channel List’. You can then request measurements in order to test the sensor.

However, you do require the current version of the UMB-Config-Tool to configure ventus .

Note: All other devices which are used in the polling process, e.g. modems, LCOM etc., must be disconnected from the UMB network during configuration.

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12.3.1 Configuration

After a configuration has been loaded, all relevant settings and values can be adjusted.

Depending on the device type, only the settings pertinent to the respective available sensors are relevant.

12.3.2 General Settings

Figure 10:General

Settings ID:

Description:

Baud rate:

NOT

Protocol:

Timeout: the minutes)

Device ID (factory setting 1; assign device IDs to additional devices in ascending order).

In order to differentiate the devices you can enter a description here, e.g. the location.

Transmission speed of the RS485 interface (factory setting 19200 (DO

CHANGE for operation with ISOCON-UMB).

Communications protocol of the sensor (binary, ASCII, NMEA, SDI-12,

Modbus-RTU, Modbus-ASCII)

In the event of a temporary changeover of the communications protocol, system switches back to the configured protocol after this time (in

(no function at present).

12.3.3 Wind Settings

Figure 11: Wind

Settings

Pressure

Offset:

Interval:

Altitude:

Absolute offset on the measurement in the unit of the accompanying channel.

Time in minutes for the minimum, maximum and average value calculation interval.

Enter the local altitude in meters here for the correct calculation of relative air pressure (referenced to sea level).

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Wind

Interval/average: Adjustment how often a new value is measured and how many values are part of average calculation.

Wind speed min: Approach velocity onto the wind meter with effect from which a measurement is transmitted, in the unit of the accompanying channel.

Offset wind dir.: It is possible to add a offset to the wind direction to change for example

0° (north) to 180° (south).

Heater mode: The device can be configured for heating in different operating modes.

You can find a precise description of the operating modes on page 28.

Turn heater off at over/under voltage:

If this parameter is set to “On”, the heating will be turned off, if the supply voltage surveillance is beyond one of the thresholds of the voltage surveillance (20V ... 28V)

12.3.4 NMEA Settings

Figure 12: NMEA

Settings

Here it is possible to adjust the NMEA-specific values for TT (Independent telegram transmission), OS (Scaling of wind speed), TG (Control line trigger property) and OR

(Output interval).You can find a precise description of the operating modes on page 44.

NMEA talker device identifier:

The first two characters of the NMEA telegram header, which .identify the talker device type, can be set. If the selection for the second character is “#0”, the character will be suppressed, so the talker ID has one character only.

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12.3.5 Analog output Settings

Note: The operation of the analog outputs requires that the communication protocol is set to UMB binary!

Figure 13: Analog output Settings:

Current Mode

First the operating mode of the analog output has to be selected. For analog output 1 Off

(deactivated), current (0/4..20mA), voltage (0/2..10V) and frequency (2..2000Hz) are available. Analog output 2 can be operated in Off, current and voltage mode.

Then select the channels for the analog output and adjust the scaling. For the analog limits

(default 4-20 mA) you have to set the digital limits (for example 0

Example:

With the above limits the analog value for a wind speed of 10 m/s will be

(20mA-4mA) / (75m/s-0m/s) * 10m/s + 4mA = 6.13mA.

The settings in case of voltage mode operation are similar, except of the different limits for the output values.

– 75 m/s).

Figure 14: Analog output Settings:

Voltage Mode

When operating the analog output in frequency mode, additionally the voltage level for the frequenc y output, i.e. the voltage in case of “high” level, has to be adjusted (5.0V (default) in this example)

Figure 15: Analog output Settings:

Frequency Mode

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Figure 17: Example of Measurement

Polling

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12.4 Function Test with UMB-Config-Tool

The functions of the ventus

can be tested with the UMB-Config-Tool by polling various channels. ventus

Note: All other devices which are used in the polling process, e.g. modems, LCOM etc., must be disconnected from the UMB network during the function test.

12.4.1 Channels for Measurement Polling

You can select the channel for measurement polling by the UMB-Config-Tool by clicking on the respective channel.

Figure 16:

Measurement Polling

Channels

12.4.2 Example of Measurement Polling

Note: The UMB-Config-Tool is provided for test and configuration purposes only. It is not suitable for the permanent acquisition of measurement data. We recommend the use of professional software solutions for this purpose, e.g. SmartView3.

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12.5 Equipment Heating ventus

has 2 heating elements (one element only on plastic version) to keep the sensor free of snow and ice. One element is in the cover (metal version only) and the other is built into the ultrasonic sensors.

12.5.1 Heating mode

The heating of the device can be operated in 4 different modes:

0x00: Heating always off

0x01: Automatic heating control

The heating switches on when the housing temperature falls below +15°C

(adjustable between 2°C and 20°C) and switches off at a housing temperature of

>+20°C (set temperature +5°C) (metal)

The heating switches on when the housing temperature falls below +50°C

(adjustable between 2°C and 70°C) and switches off at a housing temperature of

>+55°C (set temperature +5°C) (plastics)

0x02: The switch-on temperature is adjusted to +40°C; in this condition the heating switches

on at room temperature (for test purposes only)

0x03: Heating control is disabled when the control line is at the “high” level, else automatic

0x04: Heating control is disabled when the control line is at the “low” level, else automatic

12.5.2 Heating capacity

The heating capacity can be set in accordance with the following modes:

0x00: Full heating capacity (ca. 240W)

0x01: Alternating heating:

Cover plate alternating to base plate (ca. 100W or 150W alternating)

The next level of heating switches in if the pre-set temperature for the respective level is not reached within 4 minutes.

In this mode you only need a power supply with 140W.

12.5.3 Heater Turn Off on Over / Under Voltage

If the heater turn off on over / under voltage is activated, the heating will be automatically switched of, if the supply voltage is outside of the surveillance window.

The lower threshold is ~20V, the upper threshold is ~28V.

Factory setting

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13 Firmware Update

To keep the sensor in accordance with the latest state-of-the-art, it is possible to carry out a firmware update on site with no need to remove the sensor and return it to the manufacturer.

The firmware update is carried out with the aid of the UMB-Config-Tool.

The firmware update is only possible in half-duplex mode.

The description of the firmware update can be found in the instructions for the UMB-

Config-Tool. Please download the latest firmware and UMB-Config-Tool from our website www.lufft.de

and install it on a Windows

PC. You can find the instructions here:

14 Maintenance

In principle the equipment is maintenance-free.

However, it is recommended to carry out a functional test on an annual basis. When doing so, pay attention to the following points:



Visual inspection of the equipment for soiling



Check the sensors by carrying out a measurement request

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15 Technical Data

Power supply: 24VDC ± 10%

12VDC if no

Current consumption and power input - sensor:

heating is used ca. 50mA / 1.2VA at 24VDC

Current consumption and power input with heating (metal): ca. 10A / 240VA at 24VDC

Current consumption and power input with heating (plastics): ca. 900mA / 21.6VA at 24VDC

Dimensions including mounting bracket:

Ø 150mm, height 170mm

Weight including mounting bracket, excluding connection cable: ca. 1.62 kg (metal) ca. 0,80 kg (plastics)

Fastening:

Protection class:

Protection type:

Pole with Ø 50mm

III (SELV)

IP66 (metal)

IP66 (plastics)

Storage conditions

Permissible storage temperature: -55°C ... +80°C

Permissible relative humidity: 0 ... 95% RH

Non-condensing

Operating conditions

Permissible operating temperature: -40°C ... +60°C (with heating)

Permissible operating temperature: -20°C ... +60°C (without heating)

Permissible relative humidity: 0 ... 100% RH

Permissible altitude above sea level: N/A

RS485 interface, 2

or 4 wire, half

or full duplex

Data bits:

Stop bit:

Parity:

Tri-state:

Adjustable baud rates:

57600

(SDI-12 mode: 7)

No (SDI-12 mode: even)

2 bits after stop bit edge

1200, 2400, 4800, 9600, 14400, 19200

, 28800,

(when entering SDI12 mode the circuit is switched to conform to the standard’s requirements)

Analog interface circuits: A: 0 or 4 - 20mA / 0 or 2 – 10V / 2 – 2000Hz

Maximum load:

Resolution:

Channels:

Update rate:

B: 0 or 4 - 20mA / 0 or 2 – 10V

500



(in current mode)

16 bits

Adjustable

250ms; 1-10 seconds

Housing: Seawater-resistant aluminum AlMg3Si

Factory setting and baud rate for firmware update

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Operating Manual V16/05.2016

15.1 Measuring Range / Accuracy

15.1.1 Wind Speed

Measurement process:

Measuring range:

Resolution:

Accuracy:

Ultrasound

0 – 90m/s

0.1m/s

±0,2 m/s or ±2% (0 … 65m/s) RMS (metal)

(the higher value)

±5% (> 65m/s) RMS (metal)

±0,3 m/s oder ±3% (0 … 35m/s) RMS (plastics)

(the higher value)

±5% (> 35m/s) RMS (plastics)

Response threshold (adjustable): 0.1 m/s (metal)

Sampling rate:

Units:

0.3 m/s (plastics)

250ms; 1-10 seconds m/s; km/h; mph; kts ventus

15.1.2 Wind Direction

Measurement process:

Measuring range:

Resolution:

Accuracy:

Ultrasound

0 – 359.9°

0.1°

<2° (> 1m/s) RMSE (metal)

< 3° (> 1m/s) RMSE (plastics)

Response threshold (adjustable): 0.1 m/s (metal)

Sampling rate:

0.3 m/s (plastics)

250ms; 1-10 seconds

15.1.3 Virtual Temperature

Measurement process:

Measuring range:

Resolution:

Sensor accuracy:

Sampling rate:

Units:

15.1.4 Air Pressure

Measurement process:

Measuring range:

Resolution:

Accuracy:

Sampling rate:

Unit:

Ultrasound

-50°C ... +70°C

0.1°C

+/- 2.0 K (unheated and without solar irradiation or wind speed above 4 m/s)

1-10 seconds

°C; °F

MEMS sensor - capacitive

300 ... 1200hPa

0.1hPa

+/- 1.5hPa

10sec hPa

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

ventus

Figure 18: ventus

15.2 Drawing



150 mm

Operating Manual V16/05.2016

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Operating Manual V16/05.2016 ventus

16 EC Certificate of Conformity

Product: Wind Meter

Type: ventus

(Order No.: 8371.UM)

We herewith certify that the above mentioned equipment complies in design and construction with the Directives of the European Union and specifically the EMC Directive in accordance with 2004/108/EC.

The above mentioned equipment conforms to the following specific EMC Standards:

EN 61000-6-2:2005 Part 6-2: Generic Standards - Immunity for Industrial Environments

EN 61000-4-2 (2009)

EN 61000-4-3 (2011)

EN 61000-4-4 (2010)

EN 61000-4-5 (2007)

EN 61000-4-6 (2009)

EN 61000-4-8 (2010)

EN 61000-4-16(2010)

EN 61000-4-29(2001)

ESD contact: 8kV air: 15kV

Radiated electromagnetic field 30 V/m

Burst

Surge

2 kV supply: 0,5 kV housing: 8kV

Conducted disturbances

Magnetic field 50Hz

30 V

30 A/m common mode disturbances short interruptions and voltage variations on d.c.

EN 61000-6-3:2001 Part 6-3: Generic Standards - Emission Standard for Residential,

Commercial and Light Industrial Environments

EN 55011:2009 +A1:2010 (2011) Line-conducted disturbances

IEC / CISPR 11:2009 and change 1:2010 Class B prEN 50147-3:2000 Radiated emission

IEC 60068-2-6/IEC 60945 vibration check

MIL-Std 810 Verfahren 509.3 Saline mist check

IEC 60068-2-52 sec. Ed.: 1996 Severity 1

MIL-Std 810F Method 521.2

UL61010-1:2004

CAN/CSA-C22.2 No. 61010-1:2004

Icetest

Fellbach, 16.07.2012 Axel Schmitz-Hübsch

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

ventus

Operating Manual V16/05.2016

Product: Wind Meter

Typ: V200A (Order No.: 8371.UA01)

We herewith certify that the above mentioned equipment complies in design and construction with the Directives of the European Union and specifically the EMC Directive in accordance with 2004/108/EC.

The above mentioned equipment conforms to the following specific EMC Standards:

EN 61000-6-2:2005 Part 6-2: Generic Standards - Immunity for Industrial Environments

EN 61000-4-2 (2009)

EN 61000-4-3 (2011)

EN 61000-4-4 (2010)

EN 61000-4-5 (2007)

EN 61000-4-6 (2009)

EN 61000-4-8 (2010)

EN 61000-4-29(2001)

ESD

Radiated electromagnetic field (criterion B)

Burst

Surge

Conducted disturbances

Magnetic field 50Hz short interruptions and voltage variations on d.c.

EN 61000-6-4:2001 Part 6-4: Generic Standards - Emission Standardfor Industrial

Environments

EN 55011:2009 +A1:2010 (2011) Line-conducted disturbances

IEC / CISPR 11:2009 and change 1:2010 Class A prEN 50147-3:2000 Radiated emission

Fellbach, 16.07.2012 Axel Schmitz-Hübsch

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17 Fault Description

ventus

Fault Description

Device transmits error value 50h

(80d)

Device transmits error value 51h

(81d)

Device transmits error value 55h

(85d) for wind measurement

Cause - Remedy

The device does not allow polling or does not respond

Wind direction transmits incorrect values

Device transmits error value 28h

(40d)

Check supply voltage

Check interface connection

False device ID  check ID; devices are delivered with ID 1.

Device not correctly aligned  check alignment of device to North.

Device is in initialization phase after start-up  device delivers measurement values after ca. 10 seconds

Device is being operated above the specified measuring range

Device is being operated below the specified measuring range

The quality of the wind measurement is not always 100%

Device transmits an error value not listed here

Minimum value of wind direction is greater than maximum value

Device unable to carry out valid measurement due to ambient conditions.

There may be several causes for this:

Device is being operated above the specified measuring range

Very strong horizontal rain or snowfall

ventus sensors are heavily soiled  clean sensor

ventus

sensors are iced up  check heating mode in configuration and verify function / connection of heating

There are foreign bodies in the ventus measuring section

One of the ventus

sensors is faulty  return device to manufacturer for repair

The device should always transmit 90 – 100% in normal operation. Values of up to 50% do not represent a general problem.

When error value 55h (85d) is transmitted, this value is 0%.

The device may be faulty if it permanently transmits values below 50%.

There may be several reasons for this behavior  contact the manufacturer’s technical support service.

In the case of wind direction, the minimum / maximum value indicates the direction at which the minimum / maximum wind speed was measured.

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18 Disposal

18.1 Within the EC

The device must be disposed of in accordance with European Directives 2002/96/EC and

2003/108/EC (waste electrical and electronic equipment).

18.2 Outside the EC

Please comply with the applicable regulations for the proper disposal of waste electrical and electronic equipment in your respective country.

19 Repair / Corrective Maintenance

Please arrange for any faulty equipment to be checked and, if necessary, repaired by the manufacturer exclusively. Do not open the equipment and do not under any circumstances attempt to carry out your own repairs.

In matters of warranty or repair please contact:

G. Lufft Mess- und Regeltechnik GmbH

Gutenbergstraße 20

70736 Fellbach

P.O. Box 4252

70719 Fellbach

Germany

Tel: +49 711 51822-0

Hotline: +49 711 51822-52

Fax: +49 711 51822-41

E-Mail: [email protected] or your local distributor.

19.1 Technical Support

Our Hotline is available for technical questions via the following e-mail address: [email protected]

You can also consult frequently asked questions at http://www.lufft.com/ (menu header:

FAQs).

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Operating Manual V16/05.2016

20 Appendix

ventus

20.1 Channel List Summary

The channel assignment described here applies to online data requests in binary and

ASCII protocol. act

UMB Channel min max

Temperature

100 120

105 125

112

113

117

118

Air Pressure

300

305

320

325

Wind

400

405

410

420

425

430

415

500

805

435

520

Wind

340

345

440

445

450

455

540

140

145

Measuring Range avg special Measurement Variable (float) min max unit

160

165

360

365

460

465

470

475 vect. avg

480

485

490

495

580 virtual temperature virtual temperature

-50.0

-58.0

70.0

158.0

Heating temperature top -50.0 150.0

Heating temperature bottom -50.0 150.0

Heating temperature top -58.0 302.0

Heating temperature bottom -58.0 302.0

Absolute air pressure

Relative air pressure wind speed wind speed wind speed wind speed wind direction wind value quality

300.0 1200.0 hPa

75.0 m/s

270.0 km/h

167.8 mph

145.8

359.9

100,0 kts

°C

°F

°C

°F

4006

4007

4997

4998

Status supply voltage, lower threshold (~ 20V)

0 : Voltage >= 20V

1: Voltage < 20V

Status supply voltage, upper threshold (~ 28V)

0 : Voltage <= 28V

1: Voltage > 28V

Status lower heating

Status upper heating

0: Heating off

1: Heating on

0: Heating off

1: Heating on

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20.2 Channel List Summary per TLS2002 FG3

The following channels are available specifically for data requests for further processing in

TLS format. These channels are available in binary protocol only.

Type

UMB

Channel

48 1048

Meaning Format Range Resolution Coding

54 1054

Result message

Air Temperature

16 bit -30 ...

+60°C

0.1°C 60.0

0.0

= 600d = 0258h

= 0d = 0000h

-0.1 = -1d = FFFFh

-30.0 = -300d = FED4h

800

1200

= 800d = 0320h

= 1200d = 04B0h

56 1056

57 1057

Result Message

Air Pressure LD

Result message

Wind Direction

16 bit 800 …

1200 hPa

1 hPa

16 bit 0 ...

359°

1° 0° (N) = 0d = 0000h

90° (O) = 90d = 005Ah

180° (S) = 180d = 00B4h

270° (W) = 270d = 010Eh

FFFFh = not definable

0.0 = 0d = 0000h

75.0 = 750d = 02EEh

64 1064

Result message

Wind Speed.

(average) WSA

Result message

Wind Speed

(peak) WSP

16 bit 0.0 ...

75.0 m/s

16 bit 0.0 ...

75.0 m/s

0.1 m/s

0.1 m/s 0.0 = 0d = 0000h

75.0 = 750d = 02EEh

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20.3 Communication in Binary Protocol operation of the protocol (available for download at www.lufft.com). principle, i.e. there may only be ONE requesting unit on a network. ventus

Only one example of an online data request is described in this operating manual. Please refer to the current version of the UMB Protocolfor all commands and the exact mode of

Note: Communication with the sensor takes place in accordance with the master-slave

20.3.1 Framing

The data frame is constructed as follows:

1 2 3 - 4 5 - 6 7 8 9 10

11 ... (8 + len) optional

9 + len

SOH <ver> <to> <from> <len> STX <cmd> <verc> <payload> ETX

10 + len

11 + len

<cs>

SOH

<ver>

<to>

<from>

Control character for the start of a frame (01h); 1 byte

Header version number, e.g.: V 1.0  <ver> = 10h = 16d; 1 byte

Receiver address; 2 bytes

Sender address; 2 bytes

Number of data bytes between STX and ETX; 1 byte

Control character for the start of payload transmission (02h); 1 byte

<len>

STX

<cmd>

<verc>

ETX

Command; 1 byte

Version number of the command; 1 byte

Data bytes; 0 – 210 bytes

Control character for the end of payload transmission (03h); 1 byte

<cs>

EOT

Check sum, 16 bit CRC; 2 bytes

Control character for the end of the frame (04h); 1 byte

Control characters: SOH (01h), STX (02h), ETX (03h), EOT (04h).

12 + len

EOT

20.3.2 Addressing with Class and Device ID

Addressing takes place by way of a 16 bit address. This breaks down into a Class ID and a

Device ID.

Address (2 bytes = 16 bit)

Bits 15

– 12 (upper 4 bits)

Class ID (0 to 15)

0 Broadcast

8 ventus

15 Master or control devices

Bits 11

– 8

(middle 4 bits)

Reserve

Bits 7

– 0 (lower 8 bits)

Device ID (0

– 255)

0 Broadcast

1 - 255 Available

ID = 0 is provided as broadcast for classes and devices. Thus it is possible to transmit a broadcast on a specific class. However this only makes sense if there is only one device of this class on the bus; or in the case of a command, e.g. reset.

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20.3.3 Examples for Creating Addresses

If, for example, you want to address ventus

with the device ID 001, this takes place as follows:

The class ID for the ventus

is 8d = 8h; the device ID is e.g. 001d = 01h

Putting the class and device IDs together gives the address 8001h (32769d).

20.3.4 Example of a Binary Protocol Request

If, for example, a ventus with the device ID 001 is to be polled from a PC for the current temperature, this takes place as follows:

Sensor:

The class ID for the ventus is 8 = 8h; the device ID is 001 = 01h

Putting the class and device IDs together gives a target address of 8001h.

PC:

The class ID for the PC (master unit ) is 15 = Fh; the PC ID is e.g. 001d = 01h

Putting the class and device IDs together gives a sender address of F001h.

The length <len> for the online data request command is 4d = 04h; the command for the online data request is 23h; the version number of the command is 1.0 = 10h.

The channel number is in <payload>; as can be seen from the channel list (page Fehler!

Textmarke nicht definiert.

), the current temperature in °C in the channel is 100d = 0064h.

The calculated CRC is 540Bh.

The request to the device:

<ver

3 4 5 6

<len

<cmd

01h 10h

01 h

80 h

01 h

F0 h

The response from the device:

04h 02h 23h

<verc

10h

<channel

<cs>

11 12 13 14 15 16

64h 00h 03h

0B h

54 h

04h

SOH <ver> <to>

1 2 3 4

<from>

5 6

7 8 9 10 11 12 13 14

01h 10h 01h F0h 01h 80h 0Ah 02h 23h 10h 00h 64h 00h 16h

<value> ETX <cs> EOT

15 16 17 18 19 20 21 22

00h 00h B4h 41h 03h 1Fh 94h 04h

Interpretation of the response:

<status> = 00h device o.k. (

≠ 00h signifies error code; see page 41)

<typ> = Data type of the following value; 16h = float (4 bytes, IEEE format)

<value> = 41B40000h corresponds to a float value of 22.5

The temperature is therefore 22.5°C.

The correct data transmission can be checked with the aid of the check sum (941Fh).

Note: Little Endian (Intel, low byte first) applies when transmitting word and float variables of addresses or the CRC, for example. This means first the low byte and then the high byte.

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20.3.5 Status and Error Codes in Binary Protocol

Extract from list: ventus

If a measurement request delivers the <status> 00h, the sensor is working correctly. You can find a complete list of additional codes in the description of the UMB protocol.

<status> Description

00h (0d) Command successful; no error; all o.k.

10h (16d) Unknown command; not supported by this device

11h (17d) Invalid parameter

24h (36d) Invalid channel

28h (40d) Device not ready; e.g. initialization / calibration running

50h (80d) Measurement variable (+offset) is outside the set display range

51h (81d)

52h (82d) Measurement value (physical) is outside the measuring range (e.g. ADC over range)

53h (83d)

54h (84d) Error in measurement data or no valid data available

55h (85d) Device /sensor unable to carry out valid measurements due to ambient conditions

20.3.6 CRC Calculation

CRC is calculated according to the following rules:

Norm: CRC-CCITT

Polynomial: 1021h = x16 + x12 + x5 + 1 (LSB first mode)

Start value: FFFFh

You can find further information in the description of a CRC calculation in UMB Protocol.

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Operating Manual V16/05.2016

20.4 Communication in ASCII Protocol

Text-based communication with devices is possible using ASCII protocol.

To do this, in the device configuration, interface settings, the protocol mode must be set to

ASCII (see page 24).

ASCII protocol is network-compatible and serves exclusively for online data requests. The device will not respond to incomprehensible ASCII commands.

Note: The use of binary protocol is recommended for lengthy transmission routes (e.g. network, GPRS/UMTS), as ASCII protocol is unable to detect transmission errors (not

CRC-secured).

Note: TLS channels are not available in ASCII protocol.

20.4.1 Structure

An ASCII command is introduced by the ‘&’ character and completed by the CR (0Dh) sign.

There is a space character (20h) between the individual blocks in each case; this is represented by an underscore character ‘_’. Characters that represent an ASCII value are in ordinary inverted commas.

20.4.2 Summary of ASCII Commands

Command Function

Online data request

Switches to binary protocol

Triggers software reset

Software reset with delay



AZ l k k k

I Device information k

These operating instructions describe the online data request only. You can find the description of the other commands in the UMB protocol.

20.4.3 Online Data Request (M)

Description: By way of this command, a measurement value is requested from a specific channel.

Request: ‘&’_<ID> 5 _‘M’_<channel> 5

Response: ‘$’_<ID> 5 _‘M’_<channel> 5

_<value>

<ID>

Device address (5 decimal places with leading zeros)

<channel>

Indicates the channel number (5 decimal places with leading zeros)

<value>

Measurement value (5 decimal places with leading zeros); a measurement value standardized to 0 – 65520d. Various error codes are defined from 65521d – 65535d.

Example:

Request: &_32769_M_00100

By way of this request, channel 100 of the device with address 32769 ( ventus

with device ID

001).

Response: $_32769_M_00100_34785

This channel outputs a temperature from –40 to +60°C; this results in the following calculation:

0d corresponds to -50°C

65520d

36789d

13,7°C corresponds to +70°C corresponds to [+70°C – (-50°C)] / 65520 * 34785 +(-50°C) =

Note: TLS channels are not available in ASCII protocol.

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Operating Manual V16/05.2016

20.4.4 Standardization of Measurement Values in ASCII Protocol

The standardization of measurement values from 0d – 65520d corresponds to the measuring range of the respective measurement variable.

Measurement Variable min

Measuring Range max unit

Temperature

Temperature

Air Pressure

Relative air pressure

Absolute air pressure

Wind

-50.0

-58.0

300,0

70.0

158.0

1200,0

°C

°F hPa

Wind speed

Wind direction

Quality of wind measurement

0.0

75.0

270.0

167.8

145.8

359.9

100.0 m/s km/h mph kts

% ventus

20.4.5 Status and Error Codes in ASCII Protocol

Various error codes are defined from 65521d – 65535d in addition to the standardization of measurement values.

Codes:

<code> Description

65521d Invalid channel

65523d Measurement value outside measuring range (too high)

65524d Measurement value outside measuring range (too low)

65525d Measurement data error or no valid data available

65526d Device / sensor unable to execute valid measurement due to ambient conditions

65534d Invalid calibration

65535d Unknown error

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Operating Manual V16/05.2016

20.5 Communication in NMEA Protocol

Wind direction and wind speed in accordance with NMEA protocol can be requested via the NMEA protocol.

To do this, in the device configuration, interface settings, the protocol mode must be set to

NMEA (see page24).

NMEA protocol is network-compatible and serves exclusively for online data requests. The device will not respond to incomprehensible NMEA commands.

Note: The use of binary protocol is recommended for lengthy transmission routes (e.g. network, GPRS/UMTS), as NMEA protocol is unable to detect transmission errors (not

CRC-secured).

Note: In the NMEA protocol, data output is available by means of NMEA telegram only.

In the NMEA protocol, it is possible to control the telegram output by means of the control

line when using full duplex operation (see page 19).

20.5.1 Structure

An NMEA command is initiated by the ID and concluded with the CR sign (0Dh).

Characters that represent an ASCII value are in ordinary inverted commas.

20.5.2 ID

The NMEA-ID is derived from the UMB-ID, by deducting 1.

Example: UMB-ID:

NMEA-ID:

20.5.3 Summary of NMEA commands

Command Function

Telegram request NMEA / VDT

Independent telegram transmission NMEA /

VDT

Access mode (read only/admin)

Duplex mode

Baudrate

Response delay

Heating duty

Heating mode

Device ID

Measurement interval

Output interval

Averaging interval

Scaling of wind speed

North correction

Triggers software reset

Control line trigger property

Switches to binary protocol

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Differentiation is made between 2 authorization levels when sampling:

Read only and

Admin

The settings for all parameters can be requested in both modes but can only be changed in

“Admin” mode. In “Read only” mode it is only possible to enable automatic telegram transmission and to trigger a software reset.

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Operating Manual V16/05.2016

* xx

,R, xxx.x

20.5.4 Telegram Request (NMEA)

Description: This command requests the NMEA telegram.

Request: <ID>‘TR4’(CR)

<ID> Device address (2 decimal places with leading zeros)

Response: $xxMWV,xxx.x,R,xxx.x,M,A*xx(CR)(LF)

$xxMWV, Message ID, xx is the device type ID, factory default: WI, i.e.

message ID $WIMWV (setting of the device type ID see page 25)

xxx.x Wind direction fix

Wind speed fix

Possible values K,N,M,S for km/h, Knots, m/s, mph fix

A=valid value, V= invalid value

Check sum identifier

Check sum as hex value

Carriage Return

Line Feed

Response in case of error

Request: <ID>‘TR4’(CR)

<ID> Device address (2 decimal places with leading zeros)

Response: $xxMWV,,R,,M,V*xx(CR)(LF)

$xxMWV, Message ID, see above

,R,

, fix fix

Possible values K,N,M,S for km/h, Knots, m/s, mph fix

V= invalid value

Check sum identifier xx

Check sum as hex value

Carriage Return

Line Feed

Example:

Request: 01TR4

Response: $WIMWV,230.6,R,003.4,N,A*23

This means that the wind is coming at a speed of 3.4 knots from 230.6°

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20.5.5 Telegram Request (VDT)

Description: This command requests the VDT telegram.

Request: <ID>‘TR2’(CR)

<ID> Device address (2 decimal places with leading zeros)

Response: <STX>xx.x xxx xxx.x xx*xx <CR><ETX>

<STX> Start of Text (0x02) xx.x xxx

Wind speed in m/s

Wind direction ° xxx.x xx

Air temperature (virt.) in °C signed +/-

Status as hex value (s. below)

* xx

<CR>

Check sum identifier

Check sum as hex value

<ETX>

Carriage Return (0x0D)

End of Text (0x03)

Response in case of error

Request: <ID>‚TR2’(CR)

<ID> Geräteadresse (2-stellig dezimal mit führenden Nullen)

Response: <STX>FF.F FFF FFF.F xx*xx <CR><ETX>

<STX>

FF.F

Start of Text (0x02)

Wind speed not OK

FFF

FFF.F xx

Wind direction not OK

Air temperature (virt.) not OK

Status as hex value (s. below)

* xx

<CR>

<ETX>

Check sum identifier

Check sum as hex value

Carriage Return (0x0D)

End of Text (0x03)

Example:

Request: 01TR2

Response: <ETX>00.2 163 +24.2 00*39

This means wind with 0,2 m/s from 163°, the air temperature is 24.2°C

Status:

Bit 0:

Bit 1:

Bit 2

Status wind measurement

Status temperature measurement

0 = OK

Bit 3

Bit 4 – 7 reserved

Heating reserved

0 = off

1 = not OK

1 = on ventus

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* xx

20.5.6 Independent Telegram Transmission (NMEA)

Description: This command is used to disable/enable independent transmission of the

NMEA telegram. Independent transmission can be enabled in full duplex mode only.

Response: <ID>‘TT’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0…disabled

4…enabled

The current setting is delivered as the response if no entry is made for <value>.

Response: $xxMWV,xxx.x,R,xxx.x,M,A*xx(CR)(LF) every 1-10 seconds (depending on

MD)

$xxMWV, Message ID, xx is the device type ID, factory default: WI, i.e.

message ID $WIMWV (setting of the device type ID see page 25)

xxx.x Wind direction

,R, xxx.x

A fix

Wind speed fix

Possible values K,N,M,S for km/h, Knots, m/s, mph fix

A=valid value, V= invalid value

Check sum identifier

Check sum (high byte first)

Carriage Return

Line Feed

Response in case of error

Request: <ID>‚‘TT’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0…disabled

4…enabled

Response: $WIMWV,,R,,M,V*xx(CR)(LF)

$WIMWV, fix

,R, fix xx

LF fix

Possible values K,N,M,S for km/h, Knots, m/s, mph fix

V= invalid value

Check sum identifier

Check sum (high byte first)

Carriage Return

Line Feed

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20.5.7 Independent Telegram Transmission (VDT)

Description: This command is used to disable/enable independent transmission of the

VDT telegram. Independent transmission can be enabled in full duplex mode only.

Response: <ID>‘TT’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0…disabled

2 …enabled

The current setting is delivered as the response if no entry is made for <value>.

Response: <STX>xx.x xxx xxx.x xx*xx <CR><ETX>

<STX> xx.x

Start of Text (0x02)

Wind speed in m/s xxx xxx.x xx

* xx

<CR>

<ETX>

Wind direction °

Air temperature (virt.) in °C signed +/-

Status as hex value (s. below)

Check sum identifier

Check sum as hex value

Carriage Return (0x0D)

End of Text (0x03)

Response in case of error

Response: <STX>FF.F FFF FFF.F xx*xx <CR><ETX>

<STX> Start of Text (0x02)

FF.F

FFF

FFF.F xx

Wind speed not OK

Wind direction not OK

Air temperature (virt.) not OK

Status as hex value (s. below)

* xx

<CR>

<ETX>

Status:

Bit 0:

Check sum identifier

Check sum as hex value

Carriage Return (0x0D)

End of Text (0x03)

Bit 1:

Bit 2

Bit 3

Bit 4 – 7

Status wind measurement

Status temperature measurement reserved

Heating reserved

0 = OK

0 = off

1 = not OK

1 = on

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20.5.8 Access Mode

Description: This command is used to switch between Read only and Admin modes.

Request: <ID>‘KY’<key>(CR)

<ID> Device address (2 decimal places with leading zeros)

<key> 0

4711

Read only

Admin

It is possible to set all parameters in Admin mode only. The parameters are effective immediately after setting; however they are only stored permanently in the sensor in Read only mode after quitting Admin mode. Parameters that were changed in error but not yet saved can be reset by briefly disconnecting the sensor from the power supply.

Response on change from Read only mode to Admin mode:

!00KY04711

Setting rights -> ADMIN

Save new configuration with 'idKY00'

Response on change from Admin mode to Read only mode:

!00KY00000

Setting rights -> READ ONLY

Configuration saved.

20.5.9 Duplex Mode

Description: This command is used to switch between half and full duplex.

Note: Switchover takes place immediately, i.e. a suitable communication module must then be connected to the sensor. If the switchover is made in error, the previous setting can be restored by briefly disconnecting the sensor from the power supply.

Request: <ID>‚‘DM’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0 …half duplex

1…full duplex

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID> ‘DM’<value>(CR)

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20.5.10 Baud Rate

Description: This command sets baud rate and parity.

Note: The switchover is effective after the next reset. To activate the new settings a reset must be initiated by reset command or by briefly disconnecting the sensor from the power supply.

Request: <ID>‚‘BD’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros) baud rate / parity code (see table below)

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID>‘BD’<value>(CR)

Table of Baud Rate Codes

Code Baud Rate Parity reserved reserved

1200

2400

8N1

4800

9600

19200

38400

57600 reserved

1200

2400

8N1

8N1

8N1

7E1

4800

9600

19200

38400

57600 reserved

7E1

20.5.11 Response Delay

Description: This command sets the response delay after NMEA requests.

Request: <ID>‚‘RD’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0 … 1000 delay time in msec

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID>‘RD’<value>(CR)

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20.5.12 Heating Duty

Description: This command is used to switch between full and half heating duty.

Request: <ID>‚‘HP’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0 …full heating duty

1… alternating heating

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID> ‘HP’<value>(CR)

20.5.13 Heating Mode

Description: This command is used to switch between 4 heating modes. The trigger property TG is automatically set to 0 (disabled) when the setting values are 3 or 4.

Request: <ID>‘HT’<value>(CR)

<ID> Device address (2 decimal places with leading zeros)

<value> 0: Heating is always off

1: Heating is automatically controlled

Heating switches on when the housing temperature falls below +2°C

(adjustable between 2°C and 10°C) and switches off at a housing temperature of >+7°C (set temperature +5°C)

2: The switch-on temperature is shifted to +40°C; thus the heating switches on at room temperature (for test purposes only)

3: Heating is disabled when the control line is at “high” level, otherwise automatic

4: Heating is disabled when the control line is at “low” level, otherwise automatic

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID> ‘HT’<value>(CR)

20.5.14 Device ID

Description: This command is used to set the sensor ID.

Request: <ID>‘ID’<value>(CR)

<ID> Device address (2 decimal places with leading zeros)

<value> New ID

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID> ‘ID’<value>(CR)

20.5.15 Measurement Interval

Description: This command is used to set the measurement interval.

Request: <ID>‘MD’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0..10 seconds

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID> ‘MD’<value>(CR)

Factory setting

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20.5.16 Output Interval

Description: This command is used to set the time interval for telegram transmission when independent telegram transmission (TT) is enabled.

Request: <ID>‘OR’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

10..10000 milliseconds

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID> ‘OR’<value>(CR)

Note: The minimal output interval depends on the given baudrate: baudrate [baud]

1200

2400

4800

Minimal output interval [ms]

250

130

9600

14400

19200

28800

57600

10 ventus

20.5.17 Averaging Interval

Description: This command is used to set the averaging interval of the wind sensor.

Request: <ID>‘AV’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0 restore the factory settings of the averaging interval

1 … 1200 Interval in 1/10 seconds (max 120sec). Settings 1 … 10 all lead to the minimal interval time of 1sec

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID>‘AV’<value>(CR)

20.5.18 Scaling the Wind Speed

Description: This command is used to set the unit for wind speed.

Request: <ID>‘OS’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0 …m/s

1…km/h

2…miles/h

3…knots

The current setting is delivered as the response if no entry is made for <value>.

Response: !

<ID> ‘OS’<value>(CR)

20.5.19 North Correction of the Wind Direction

Description: This command is used to set the north correction of the wind direction. This allows to adjust to sensor installation deviations.

Request: <ID>‘NC’<value>(CR)

<ID>

<value>

Device address (2 decimal places with leading zeros)

0 … 360 Correction value in °

The current setting is delivered as the response if no entry is made for <value>.

Response: !

<ID><value>(CR)

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20.5.20 Control line trigger property

Description: This command is used to set the trigger property when independent telegram transmission (TT) is enabled. If when enabling the function the heating control setting is 3 or 4 (control via control line), this (automatically) switches to 1.

Request: <ID>‘TG’<value>(CR)

<ID> Device address (2 decimal places with leading zeros)

<value> 0: Disabled/heating control

1:Telegram transmission triggered on rising edge of control voltage

2:Telegram transmission triggered on falling edge of control voltage

3:Telegram transmission while control voltage is “high”

4:Telegram transmission while control voltage is “low”

The current setting is delivered as the response if no entry is made for <value>.

Response: !<ID> ‘TG’<value>(CR)

20.5.21 Software reset

Description: This command is used to trigger a software reset

Request: <ID>‘RS1’(CR)

<ID> Device address (2 decimal places with leading zeros)

Response: !<ID> ‘RS’<value>(CR)

20.5.22 Switchover to binary protocol

Description: This command is used to temporarily switch over to UMB protocol. If the switchover is to be permanent, the sensor must be configured accordingly with the aid of the UMB-Config-Tool.

Request: <ID>‘XX’(CR)

<ID> Device address (2 decimal places with leading zeros)

Response: ‘!’<ID>‘XX’(CR)

20.5.23 CRC Calculation

The CRC is calculated in accordance with the following rule:

The check sum is exclusive or an (XOR) of all characters of the telegram including the separators ´,´ but excluding ´$´ and ´*´. The hexadecimal value of the upper and lower 4 bits of the result are converted into two ASCII characters (0-9,A-F) for transmission. The high byte is transmitted first.

Further information on the description of a CRC calculation is available in the NMEA 0183 protocol.

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20.6 Communication in SDI-12 Mode

The communication in the SDI-12 mode of the WSxxx is conforming to the standard defined in ‚SDI-12 A Serial-Digital Interface Standard for Microprocessor-Based Sensors

Version 1.3 January 12, 2009‘ . The station may be operated in bus mode together with other SDI-12 sensors, connected to one SDI master (logger).

20.6.1 Preconditions for SDI-12 Operation

As the interface settings defined in the SDI-12 standard are significantly different from the

UMB default settings, some preconditions have to be met for operation:



Hardware version equal or higher 3.0



Software version equal or higher 1.5



Jumper for activation of SDI-12 mode has to be wired (see below)



Setting for SDI-12 mode in the configuration (UMB Config Tool, V1.2 or newer)

To activate the SDI-12 mode a jumper is to be wired between control input and analog ground (pins 3 and 6 of the of the UMB round connector, or red and blue wires of the connection cable).

Using the UMB Config Tool the operation mode of the station has to be set to “SDI-12”.

The baudrate will be automatically adjusted to 1200Bd by the Config Tool.The serial interface must be operated in half duplex mode

Measurement data can be transmitted alternatively in metric or US units. The selection is done by the UMB Config Tool.

When operating the device in SDI-12 mode it is basically no longer possible to access the device with the UMB Config Tool, due to the different interface parameter settings. To enable configuration access nevertheless the interface is operated in standard UMB mode for the first 5 seconds after reset / power on. If a valid UMB telegram is received within this time, the device will stay in UMB mode for the configured time out (several minutes) so that the configuration can be modified.:



Connect the PC to the Ventus through an RS-485 converter



Start the Config Tool and create a Ventus with the address of the actual device and activate at least one sensor. Start the measurement (will report connection error at first)



Reset the device (Power off / on)



When measurement values are received the measurement can be terminated, the interface is now open for configuration.

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20.6.2 Command Set

For details of the SDI-12 protocol please refer to the above mentioned standard document.

Following commands are available for the Ventus:

Note : The examples in the following sections use italics to print the requests from the logger ( 0V!

)

Befehl Funktion

?! a! aI! aAb! aM! aM1! aM2! aM3! aMC! aMC1! … aMC3! aC! aC1! … aC3!

Address search (Wildcard request, one device only on bus!)

Request device active?

Request device identification

Address change to b ( 0 … 9, A …Z, a … z)

Measurement, minimal base data set

Measurement, Temperature Values

Measurement: Wind Values

Measurement: Air Pressure Values

Measurement,minimal base data set, transmit values with CRC

Measurement, (value assignment as for aMn! commands), transmission with

CRC

Concurrent measurement, complete base data set

Concurrent measurement, (value assignment as for aMn! Commands), extended data set aR1! aR2! aR3! aR4! aRC0! aRC1! aRC2! aCC! aCC1! … aCC3! aD0! aD1! aD2! aD3! aD4! aR0!

Concurrent measurement, complete data set,, transmit values with CRC

Concurrent measurement, complete data set,, (value assignment as for aMn!

Commands), extended data set , transmit values with CRC

Data request buffer 0

Data request buffer 1

Data request buffer 2

Data request buffer 3

Data request buffer 4

Data request from continuous measurement, data set 0

Data request from continuous measurement, data set 1

Data request from continuous measurement, data set 2

Data request from continuous measurement, data set 3

Data request from continuous measurement, data set 4

Data request from continuous measurement, data set 0 with CRC

Data request from continuous measurement, data set 1 with CRC

Data request from continuous measurement, data set 2 with CRC aRC3! aRC4!

Data request from continuous measurement, data set 3 with CRC

Data request from continuous measurement, data set 4 with CRC aV! Command verification: Evaluate sensor status and heating temperatures, data request with aD0!, aD1! aXU<m/u>! Selection of the unit system for SDI12 data aXH+nnnn! Adjust the local altitude for calculation ot relative air pressure aXMn! Select the heating mode of the device ( aXR! Device Reset

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Due the applied measurement processes the Ventus will, different from other sensors described in the SDI-12 document, always measure continuously. This causes some special properties:

 The device does not need a “Wakeup” and does not have a sleep mode. So the reactions to “Break” signals and any related timings are inapplicable. “Break” will be ignored by WS devices.



Data requested with M- or C- commands are always available immediately. The device will always respond with a000n resp. a000nn . This means the device will not send any service request and will ignore measurement abort signals. The logger should request the data immediately.



M- and C- command only differ in the number of values made available in the buffers (in both cases up to the maximum permitted by the standard of 9 resp. 20).



We recommend to use the commands für continuous measurement (Rcommands) to request the data.

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20.6.3 Address Configuration

UMB Device-ID and SDI-12 Address are connected, but the different address ranges and the fact, that UMB ID’s are integer numbers, while SDI-12 addresses are ASCII characters, have to be considered.

UMB Device ID1 (default) corresponds to SDI12 Address ‘0’ (SDI-12 default).

Valid Address Ranges:

UMB to to to

‘0’

‘A’

‘a’

SDI-12 to to to

‘9’

‘Z’

‘z’

20.6.4 Measurement Data Messages

In the interest of simplified evaluation the assignment of measurement values to data buffers ‘0’ ... ‘9’ has been defined unified for all measurement commands. For this reason the responses to C-requests are restricted to 35 characters, not using the 75 characters permitted for these requests

Currently buffers ‘0’ bis ‘4’ are in use.

As with M-requests max. 9 values may be transmitted, the minimal base data set has been assigned to buffers ‘0’ and ‘1’. Buffers ‘2’ to ‘4’, which are available on request by C commands, contain further measurement values. This definition guaranties the compatibility to loggers designed according to older versions of the SDI-12 standard.

The complete range of measurement values, as defined for the UMB protocol, is available in the SDI-12 environment through the additional M and C commands (aM1! … aM3!, aMC1! … aMC3!, aC1! … aC3!, aCC1! … aCC3!).

If the measurement value is not available for some reason, e.g. sensor failure, this is indicated by a value of +999.0 or -999.9. The logger can then evaluate the reason of failure by a aV! verification request.

The following tables show the measurement values in the sequence they are arranged in the telegram (see example).

Depending on the configuration of the device the values will be transmitted in metric or US units.

Note: The configured system of units is not indicated in the data messages. The logger may request this setting with the I-command and adjust the evaluation of the data messages accordingly

Example: M Request

0M!

00008<CR><LF>

0D0!

8 Values are available

0+13.5+2.5+3.7+2.6<CR><LF>

Air temperature 13,5°C, curr.. wind speed 2,5m/s, max. Wind speed 3,7m/s, avg.wind speed 2,6m/s

0D1!

0+136.4+134.0+100.0+1010.4<CR><LF>

Curr. wind direction 136,4°, avg. wind direction(vct) 134,0°, Qualityof wind measurement 100%, rel. air presssure

(curr) 1010.4 hPa

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Example: C Request

0C!

000018<CR><LF>

0D0!

1 8 Values available

0+13.5+2.5+3.7+2.6<CR><LF>

Air temperature 13,5°C, curr.. wind speed 2,5m/s, max. Wind speed 3,7m/s, avg.wind speed 2,6m/s

0D1!

0+136.4+134.0+100.0+1010.4<CR><LF>

Curr. wind direction 136,4°, avg. wind direction(vct) 134,0°, Qualityof wind measurement 100%, rel. air presssure

(curr) 1010.4 hPa

0D2!

0+1.8+2.8+122.0+147.0<CR><LF>

Wind speed (min) 1,8m/s, Wind speed (vct)2,8m/s,Wind direction (min) 122,0°,Wind direction (max) 147,0°

0D3!

0+12.4+14.0+13.5<CR><LF>

Air temperature (min) 12,4°C, air temperature (max) 14,0°C, air temperature (avg) 13,5°C

0D4!

0+1008.2+1011.2+1009.1<CR><LF>

Rel. air pressure (min) 1008.2 hPa,rel. air pressure (max) 1011.7 hPa, rel. air pressure (avg) 1009.1 hPa

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20.6.4.1 Buffer Assigment Base Data Set

Device configured for measurement values in metric units :

Measurement value UMB

Channel

Min Max Unit

B uffer ‘0’

Air temperature (act)

Wind Speed(act)

Wind Speed (max)

Wind Speed (avg)

B uffer ‘1’

100

400

440

460

-50.0

0.0

70.0

75.0

°C m/s m/s m/s

Wind Direction (act)

Wind Direction (vct)

Wind Quality

Rel. Air Pressure (act)

Buffer ‘2’

Wind Speed(min)

500

580

805

305

0.0

359.9 °

0.0 100,0 %

300.0 1200.0 hPa

Wind Speed(vct)

Wind Direction (min)

Wind Direction (max)

Buffer ‘3’

Air temperature (min)

Air temperature (max)

Air temperature (avg)

Buffer ‘4’

420

480

520

540

120

140

160

0.0

-50.0

75.0 m/s

359.9 °

70.0

°C

Rel. Air Pressure (min)

Rel. Air Pressure (max)

Rel. Air Pressure (avg)

325

345

365

300.0 1200.0 hPa

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Device configured for measurement values in US units :

Measurement Value UMB

Channel

Min Max

Buffer ‘0’

Air Temperature (act) 105 -58.0 158.0

Unit

°F

Wind Speed(act)

Wind Speed (max)

Wind Speed (avg)

B uffer ‘1’

410

450

470

0.0

167.8

Mph mph mph

Wind Direction (act)

Wind Direction (vct)

Wind Quality

Rel. Air Pressure (act)

Buffer ‘2’

Wind Speed(min)

500

580

805

305

0.0

359.9 °

0.0 100.0 %

300.0 1200.0 hPa

Wind Speed(vct)

Wind Direction (min)

Wind Direction (max)

Buffer ‘3’

Air temperature (min)

Air temperature (max)

Air temperature (avg)

Buffer ‘4’

430

490

520

540

125

145

165

0.0

-58.0

167.8 mph

359.9 °

158.0

°F

Rel. Air Pressure (min)

Rel. Air Pressure (max)

Rel. Air Pressure (avg)

325

345

365

300.0 1200.0 hPa

300.0 1200.0 hPa ventus

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20.6.5 Additional Measurement Commands

With the additional measurement commands aM1! … aM3! aMC1! … aMC3! aC1! … aC3! aCC1! … aCC3!

(M command, data transmission with CRC)

(C command, data transmission with CRC) the complete range of measurement data of the Ventus, as defined for the UMB protocol, is also available in a SDI-12 environment.

The measurement values are grouped according to sensor types.

As for the base data, an M command only permits to request up to 9 measurement values.

With C commands, up to 20 values are available.

The buffer assignment defined below is thus structured in a way, that the resp. M command uses the D0 and D1 buffers. If more values are available for the sensor type, the

C command will also fill the buffers D2 to D4 (if required)

M1 / C1

M2 / C2

M3 / C3

Temperature

Wind

Air Pressure

M: 4 Values

M: 9 Values

M: 8 Values

C: 4 Values

C: 10 Values

C: 8 Values

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20.6.5.1 Buffer Assignment Additional Measurement Data M1 / C1 Temperature

Device configured for measurement values in metric units

Measurement value UMB

Channel

Min Max Unit

B uffer ‘0’

Air temperature (act)

Air temperature (min)

Air temperature (max)

100

120

140

-50.0 70.0

°C

Air temperature (avg) 160 -50.0 70.0

Device configured for measurement values in US units :

°C

Measurement value UMB

Channel

Min Max Unit

B uffer ‘0’

Air temperature (act)

Air temperature (min)

Air temperature (max)

105

125

145

165 Air temperature (avg)

-58.0 158.0 °F

-58.0 158.0 °F ventus

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20.6.5.2 Buffer Assignment Additional Measurement Data M2 / C2 Wind

Device configured for measurement values in metric units :

Measurement value UMB

Channel

Min Max Unit

B uffer ‘0’

Wind Speed (act)

Wind Speed (min)

Wind Speed (max)

400

420

440

0.0

75,0

75,0 m/s m/s m/s

460

480

0.0

75,0

75,0 m/s m/s

Wind Speed (avg)

Wind Speed (vct)

B uffer ‘1’

Wind Direction (act)

Wind Direction (min)

Wind Direction (max)

Wind Direction (vct)

B uffer ‘2’

500

520

540

580

0.0

359.9 °

Wind Measurement Quality 805 0.0 100.0

Device configured for measurement values in US units :

Measurement value UMB

Channel

Min Max Unit

B uffer ‘0’

Wind Speed (act)

Wind Speed (min)

Wind Speed (max)

410

430

450

0.0

167.8 Mph

167.8 mph

470

490

0.0

167.8 mph

Wind Speed (avg)

Wind Speed (vct)

B uffer ‘1’

Wind Direction (act)

Wind Direction (min)

Wind Direction (max)

Wind Direction (vct)

B uffer ‘2’

Wind Measurement Quality

500

520

540

580

805

0.0

359.9

100.0

359.9 °

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20.6.5.3 Buffer Assignment Additional Measurement Data M3 / C3 Air Pressure

Device configured for measurement values in metric or US units :

Measurement value UMB

Channel

Min Max Unit

B uffer ‘0’

Abs. Air Pressure (act)

Abs. Air Pressure(min)

Abs. Air Pressure (max)

Abs. Air Pressure (avg)

B uffer ‘1’

300

320

340

360

300.0 1200.0 hPa

Rel. Air Pressure (act)

Rel. Air Pressure(min)

Rel. Air Pressure (max)

Rel. Air Pressure (avg)

305

325

345

365

300.0 1200.0 hPa

300.0 1200.0 hPa ventus

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20.6.6 Message Device Identification

The device responds to the identification request with following message (example for SDI-

12 device address ‘0’:

0I!

013Lufft.deVentusy00 y: Metric / US units ( m = metric, u = US ) i.e. for a Ventus, configured for US units:

0I!

013Lufft.deVentusu00

20.6.7 Message Verifikation

The command verification aV! is used to evaluate status information of the device. The device responds with a0004<CR<LF> to the request, i.e. 4 values are available in the buffers.

The first 2 “measurement values”, transmitted in buffer ‘0’ contain the status information of the measurement channels.

The status data of the channels are arranged into “fake” measurement values, each digit representing on status value. The coding of the status is listed below. Generally each sensor has to status values, one for the current measurement value, and one for the value buffer, which is used for averaging and the evaluation of minimum and maximum.

The last two values, transmitted in buffer ‘1’, show the heating temperatures of the upper and the lower heating of the wind sensor.

B uffer ‘0’

Status Group 1: +nnnn

Status Group 2: +nn Wind, wind buffer

Buffer ‘1’, device configured for metric units

Measurement value

Air temperatur,.air temperature buffer, air pressure,, air pressure buffer

UMB

Channel min max Unit

-50

+150 °C

Heating temp. top 112

Heating temp. bottom 113

B uffer ‘1’, device configured for US units

Heating temp. top 117

Heating temp. bottom 118

-58

+302

°F

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Operating Manual V16/05.2016

Sensor status codes:

Sensor status

UNGLTG_KANAL

Code

2 E2_CAL_ERROR

E2_CRC_KAL_ERR

FLASH_CRC_ERR

FLASH_WRITE_ERR

FLASH_FLOAT_ERR

MEAS_ERROR

MEAS_UNABLE

INIT_ERROR

VALUE_OVERFLOW

CHANNEL_OVERRANGE

VALUE_UNDERFLOW

CHANNEL_UNDERRANGE

BUSY

8 other sensorstatus 9

Example (SDI12 Address ‘0’, no error):

0V!

00004<CR><LF>

0D0!

0+0000+00<CR><LF>

0D1!

0+73.0+65.3<CR><LF>

Example (SDI12 Address ‘0’, temperature sensor failure):

0V!

00004<CR><LF>

0D0!

0+0300+00<CR><LF>

0D1!

0+73.0+65.3<CR><LF> ventus

20.6.8 Message Selection of Measurement Unit System

The command is used to change the unit system used for the display of the SDI-12 data between metric and US units. The command is implemented as X command

Command: aXU<u/m>!

Response: aU<u/m><CR><LF> u: US-Units, m: Metric Units

Example Select metric units

0XUm!

0Um<CR><LF>

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ventus

Operating Manual V16/05.2016

20.6.9 Message Adjustment of the Altitude

For the calculation of the relative air pressure the local altitude (above sea level) of the device is required

Command: aXH+nnnn!

nnnn: Altitude of Sensor in m

Response: aXH+nnnn<CR><LF>

The assignment of an invalid altitude ( -100 < altitude < 5000) will be answered with aXHf<CR<<LF>

Example: The altitude of the location of installation is 135m

0XH+135!

0XH+135<CR><LF>

20.6.10 Message setting of the Heating Mode

The heating of the sensor may be configured in different modes (see 12.5).

Command: aXMn!

n: Heating Mode (0: Off, 1: Automatic, 2: Automatic alternating)

Response: aXMnm<CR><LF> n: selected heating mode m: alternating

The assignment of an invalid heating mode will be answered with aXMf<CR><LF>

Example: A Ventus shall be set to Automatic/Alternating

0XM2!

0XM11<CR><LF>

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Operating Manual V16/05.2016 ventus

20.7 Communication in Modbus Mode

To enable the integration of Ventus wind meters into PLC and similar environments communication with Modbus protocols is provided.

Measurement values are mapped to Modbus input registers. The range of available values is basically the same as for the UMB protocol, including the translation into different unit systems (metric, imperial …).

In the interest of safe and simple commissioning we do not use register pairs for floating point or 32 bit integers, as the use of register pairs is not described in the Modbus standard documents. All measurement values are scaled to fit into 16bit integer registers.

20.7.1 Modbus Communication Parameters

The Ventus may be configured for MODBUS-RTU or MODBUS-ASCII.

For basic configuration the UMB Config Tool is used.

Note : If the Ventus has been configured for Modbus communication, analog output functions can not be used!

If MODBUS-RTU or MODBUS-ASCII has been selected as communication protocol in the

UMB Config Tool, communication parameters are preset to 19200 Bd, even parity.

Modbus operating modes:

Baudrate:

MODBUS-RTU, MODBUS-ASCII

19200 (9600, 4800 or less)

Interface settings 8E1, 8N1

Note: Ventus Modbus communication has been tested with 1 sec poll rate. Proper function of the device will not be guaranteed for higher poll rates.

We suggest to set the poll rate to 10 sec or slower, because generally the update rate of the measurement values is 10 sec or higher (except of the fast wind speed / wind direction channels)

Anyway for most of the weather data significant changes should be expected more in the range of minutes.

20.7.2 Addressing

The Modbus address is equal to the UMB address. Valid Modbus addresses are 1 to 247.

If a higher UMB address has been selected, the Modbus address will be set to 247.

20.7.3 Modbus Functions

The functions of Conformance Class 0 and 1 have been implemented, as far as they are applicable for Ventus, i.e. all functions working on register level.

Conformance Class 0

0x03

0x16

0x04

0x06

0x07

0x11

Read Holding Registers

Write Multiple Registers

Conformance Class 1

Read Input Registers

Write Single Register

Read Exception Status

Diagnostics

Report Slave ID

Selected configuration settings

Measurement values and status information

Selected configuration settings

Currently not used (returns 0)

(replies to broadcast address as well)

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

ventus

Operating Manual V16/05.2016

20.7.3.1 Function 0x03 Read Holding Registers

The Holding Registers are used to make a selected set of adjustable parameters available on Modbus also. Similar to the measurement values are mapped to 16bit integer values, if necessary by appropriate scaling

Reg.

Adr.

Reg.

Addr.

Function Values Scale

1 0 Local Altitude

2 1

Heating operating mode

Stationsreset

Altitude in m, for calculation of relative air pressure

Value range 100 … 5000

High-Byte: Heating Operating Mode

Low-Byte Heating Power Mode

Value range and details see 12.5

(function when writing only, returns always 0)

1.0

20.7.3.2 Function 0x06 Write Holding Register, 0x10 Write Multiple Registers

Selected parameters of the Ventus can be adjusted by writing to the Modbus holding registers.

The values are checked for plausibility. Improper values will not be accepted and cause a

Modbus exception.

Writing the value 0x3247 (12871d) into register no. 3 (register adr. 2) will trigger a device reset.

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Operating Manual V16/05.2016 ventus

20.7.3.3 Function 0x04 Read Input Registers

The input registers are containing the measurement values of the compact weather station and the related status information.

The measurement values are mapped to the 16bit registers using scaling factors (0 … max. 65530 for unsigned values, -327 62 … 32762 for signed values).

Values 65535 (0xffff) resp. 32767 are used for the indication of erroneous or not available measurement values. A more detailed specification of the error can be evaluated from the status registers.

The assignment of values to the available register addresses (0 … 124) has been arranged in a way so that the user can read the most frequently used data with few (ideally only one) register block requests

Following blocks have been defined:



Status information



Frequently used values which are independent of the unit system (metric / imperial) in use



Frequently used values in metric units



Frequently used values in imperial units



Other measurement values

When using the metric unit system the first three blocks can the supply all data usually required with one request.

There is no difference in the register assignment between the sub types of the WS family.

If, dependent on the type, some value is not available, this will be indicated by setting the register to the error value..

For detailed information about measurement ranges, units etc. please refer to the related description of the UMB channels (Chapter 8 and 20.1)

Reg.

No.

Reg.

Addr.

Value (UMB-

Channel)

Range Scaling, signed/unsigned, remarks

1 0

Status information

Identification

Device status

High Byte: Device Subtype

LowByte: Software Version

Sensorstatus 1 Air temperature buffer, air temperature, air pressure buffer, air pressure (High byte -> low byte, see table below)

Coding 4 bit per status, s. below

4 3

Sensorstatus 2 Windbuffer, wind (high byte, see table below)

Coding 4 bit per status, s. below

Reserved

Diagnostics: run time in 10sec steps

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ventus

Reg.

No.

Reg.

Addr.

Value (UMB-

Channel)

Range

20 19

21 20

22 21

23 22

24 23

25 24

26 25

27 26

28 27

29 28

30 29

11 10

12 11

13 12

14 13

15 14

16 15

Values Independent of the Unit System

305

325

345

365

500

520

17 16

18 17

540

580

19 18 805

Reg.

No.

Reg.

Addr.

Value (UMB-

Channel)

Rel. Air Pressure (act.)

Rel. Air Pressure (min.)

Rel. Air Pressure (max.)

Rel. Air Pressure (avg.)

Wind Direction (act.)

Wind Direction (min.)

Wind Direction (max.)

Wind Direction (vct.)

Wind Measurement Quality

Range

112

113

400

420

440

Values in Metric Units

100 Air Temperature °C (act.)

120

140

160

Air Temperature °C (min.)

Air Temperature °C (max.)

Air Temperature °C (avg.)

460

480

Heating Temperature top °C

Heating Temperature bottom °C

Wind Speed m/s (act.)

Wind Speed m/s (min.)

Wind Speed m/s (max.)

Wind Speed m/s (avg.)

Wind Speed m/s (vct.)

Operating Manual V16/05.2016

Scaling, signed/unsigned, remarks

Factor 10, s

Factor 1, s

Scaling, signed/unsigned, remarks

Factor 10, s

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Operating Manual V16/05.2016

Reg.

No.

Reg.

Addr.

Value (UMB-

Channel)

Range

37 36

38 37

39 38

40 39

Values in US Units

105

125

Air Temperature °F (act.)

Air Temperature °F (min.)

145

165

117

118

Air Temperature °F (max.)

Air Temperature °F (avg.)

Heating Temperature top °F

Heating Temperature bottom °F

410

430

450

470

41 40 490

Reg.

No.

Reg.

Addr.

Value (UMB-

Channel)

Wind Speed mph (act.)

Wind Speed mph (min.)

Wind Speed mph (max.)

Wind Speed mph (avg.)

Wind Speed mph (vct.)

Range

42 41

43 42

44 43

45 44

46 45

47 46

48 47

49 48

50 49

51 50

52 51

53 52

54 53

55 54

455

475

495

56 55

...

125 124

Reserve

425

445

465

485

415

435

Additional Measurement Values

300 Abs. Air Pressure (act.)

320 Abs. Air Pressure (min.)

340

360

405

Abs. Air Pressure (max.)

Abs. Air Pressure (avg.)

Wind Speed km/h (act.)

Wind Speed km/h (min.)

Wind Speed km/h (max.)

Wind Speed km/h (avg.)

Wind Speed km/h (vct.)

Wind Speed kts (act.)

Wind Speed kts (min.)

Wind Speed kts (max.)

Wind Speed kts (avg.)

Wind Speed kts (vct.) ventus

Scaling, signed/unsigned, remarks

Factor 10, s

Scaling, signed/unsigned, remarks

Factor 10, s

Factor 10 , s

Factor 10, s

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

ventus

Operating Manual V16/05.2016

Sensor Status:

Each register hoIds 4 sensor status coded with 4 bits per status. The sequence defined in the table above is to understand as from most significant half byte to least significant half byte. Most of the sensors have two status values, one for the sensor itself and the current measurement value, another one for the buffer, from which average, min. And max values are evaluated.

Assignment of Status Information to Status Register

Register Status

Sensor Status 1

Byte Half-

Byte

High

Low

High

Low

High

Low

Temperature Buffer

Temperature

Air Pressure Buffer

Air Pressure

High Wind Buffer

High

Low Wind

Sensor Status 2

High 0

Low

Low 0

Example Sensor Status 1 :

Temperature buffer status, temperature status, air pressure buffer status, air pressure status

High Byte Low Byte

High Low High Low

5 3 0 7

The example values above (for illustration only, the given combination will not occur in reality) are combined to the register value 0x5307 = 21255.

The single status are retrieved from the register as integer part of

Status 1

Status 2

Status 3

Status 4

= register / 4096

= ( register / 256 ) AND 0x000F

= ( register / 16 ) AND 0x000F

= register AND 0x000F

Following table shows the status coding:

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Operating Manual V16/05.2016

Coding of Sensor Status:

Sensor State Code

UNGLTG_KANAL

E2_CAL_ERROR

E2_CRC_KAL_ERR

FLASH_CRC_ERR

FLASH_WRITE_ERR

FLASH_FLOAT_ERR

MEAS_ERROR,

MEAS_UNABLE

INIT_ERROR

VALUE_OVERFLOW

CHANNEL_OVERRANGE

VALUE_UNDERFLOW

CHANNEL_UNDERRANGE

BUSY 6

7 Other Sensor State ventus

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

ventus

Operating Manual V16/05.2016

21 List of Figures

Figure 1: Measurement Sections ........................................................................................................................................ 7

Figure 2: Influence of Wind on Time of Flight ..................................................................................................................... 8

Figure 3: Fastening to the Mast ........................................................................................................................................ 13

Figure 4: North Markings .................................................................................................................................................. 14

Figure 5: Alignment to North ............................................................................................................................................. 14

Figure 6: Installation Sketch ............................................................................................................................................. 16

Figure 7: Connections ...................................................................................................................................................... 17

Figure 8: Connection to ISOCON-UMB ............................................................................................................................ 20

Figure 9: Sensor Selection ............................................................................................................................................... 23

Figure 10:General Settings ............................................................................................................................................... 24

Figure 11: Wind Settings .................................................................................................................................................. 24

Figure 12: NMEA Settings ................................................................................................................................................ 25

Figure 13: Analog output Settings: Current Mode ........................................................................................................... 26

Figure 14: Analog output Settings: Voltage Mode ........................................................................................................... 26

Figure 15: Analog output Settings: Frequency Mode ..................................................................................................... 26

Figure 16: Measurement Polling Channels ....................................................................................................................... 27

Figure 17: Example of Measurement Polling .................................................................................................................... 27

Figure 18: ventus

.............................................................................................................................................................. 32

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Operating Manual V16/05.2016

22 Keyword Index

Accessories ................................................................. 6

Accuracy ................................................................... 31

Altitude ...................................................................... 24

ASCII-Protocol .......................................................... 42

Binary Protocol .......................................................... 39

Certificate of Conformity ............................................ 33

Channel List Summary .............................................. 37

Channel List Summary per TLS2002 ........................ 38

Class-ID .............................................................. 39, 40

Commissioning .......................................................... 22

Communication ......................................................... 69

Communication ................................................... 42, 44

Connections .............................................................. 17

CRC Calculation ........................................................ 54

Designated Use ........................................................... 5

Device-ID .................................................................. 40

Dimensions ............................................................... 30

Disposal .................................................................... 36

Drawing ..................................................................... 32

Error-Codes ......................................................... 41, 43

Heating ................................................................ 28, 30

Factory Settings ........................................................ 23

Fault Description ....................................................... 35

Firmwareupdate ........................................................ 29

Installation ................................................................. 13

Interface .................................................................... 18 ventus

ISOCON-UMB .......................................................... 20

Klassen-ID ................................................................ 39

Local Altitude ............................................................ 24

Maintenance ............................................................. 29

Measurement (UMB-Config-Tool) ............................. 27

Measurement Output ................................................ 10

Measurements ............................................................ 9

Measuring Range...................................................... 31

Modbus ..................................................................... 69

NMEA ....................................................................... 44

North Alignment ........................................................ 14

Operating conditions ................................................. 30

Order Number ............................................................. 6

Protection type .......................................................... 30

Safety Instructions ...................................................... 5

Storage conditions .................................................... 30

Supply Voltage .......................................................... 18

Symbols ...................................................................... 5

Technical Data .......................................................... 30

Technical Support ..................................................... 36

UMB-Config-Tool ................................................ 23, 27

Warranty ............................................................... 5, 36

Weight ....................................................................... 30

G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany

Contents

1

Please Read Before Use

2 Scope of Supply

3 Order Number

4 Accessories

5 Additional Documents and Software

6 Equipment Description

7 Generation of Measurements

8 Measurement Output

9

Installation

10 Connections

11 Commissioning

12 Configuration and Test

13 Firmware Update

14 Maintenance

15 Technical Data

16 EC Certificate of Conformity

Product: Wind Meter

Type: ventus

(Order No.: 8371.UM)

Product: Wind Meter

Typ: V200A (Order No.: 8371.UA01)

17 Fault Description

18 Disposal

19 Repair / Corrective Maintenance

20 Appendix

21 List of Figures

22 Keyword Index

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