FuehlerSysteme Compact WS3/O Manuale utente

1 / 34 ba_7-1-120/11E/0318

Instructions for Use

Weather Station Compact

FS6003

2 / 34 ba_7-1-120/11E/0318

Safety Instructions

•Before operating with or at the device/product, read through the operating instructions.

This manual contains instructions which should be followed on mounting, start-up, and operation.

A non-observance might cause:

- failure of important functions

- endangering of persons by electrical or mechanical effect

- damages to objects

•Mounting, electrical connection and wiring of the device/product must be carried out only by a qualified

technician who is familiar with and observes the engineering regulations, provisions and standards applicable in

each case.

•Repairs and maintenance may only be carried out by trained staff or the manufacturer.

Only components and spare parts supplied and/or recommended by the manufacturer should be used for

repairs.

•Electrical devices/products must be mounted and wired in zero potential state only.

•The manufacturer guarantees proper functioning of the device/products provided that no modifications have

been made to the mechanics, electronics or software, and that the following points are observed:

•All information, warnings and instructions for use included in these operating instructions must be taken into

account and observed as this is essential to ensure trouble-free operation and a safe condition of the measuring

system / device / product.

•The device / product is designed for a specific application as described in these operating instructions.

•The device / product should be operated with the accessories and consumables supplied and/or recommended

by the manufacturer.

•Recommendation: As it is possible that each measuring system / device / product under certain conditions, and

in rare cases, may also output erroneous measuring values, it is recommended to use redundant systems with

plausibility checks with security-relevant applications.

Environment

•Products governed by the provisions of "ElektroG" (German Electrical and Electronic

Equipment Act) will be taken back and will be recycled or environmentally compatible

disposed. We are prepared to take back all products concerned free of charge if returned to us

by our customers carriage-paid.

•Make sure you retain packaging for storage or transport of products. Should packaging

however no longer be required, arrange for recycling as the packaging materials are designed

to be recycled.

Documentation

•Although this operating instruction has been drawn up with due care, FuehlerSysteme eNET International

GmbH can accept no liability whatsoever for any technical and typographical errors or omissions in this

document that might remain.

•We can accept no liability whatsoever for any losses arising from the information contained in this document.

•Subject to modification in terms of content.

•The device / product should not be passed on without the/these operating instructions.

/ 34 ba_7-1-120/11E/0318 
 
Contents 
1Device version .......................................................................................................................... 5 
2Application................................................................................................................................ 5 
3Structure / Mode of operation.................................................................................................... 6 
4Installation of COMPACT WS3/O Weather Station ................................................................... 8 
1 Selection of installation site................................................................................................. 8 
2 Mechanical installation........................................................................................................ 9 
2.1 Alignment to north...................................................................................................... 10 
3 Electrical installation......................................................................................................... 11 
3.1 Cable, cable preparation, connector installation......................................................... 11 
3.2 Diagram of connections.............................................................................................. 12 
3.3 Connection using cable ............................................................................................. 12 
5Maintenance ........................................................................................................................... 13 
6Interface.................................................................................................................................. 14 
1 Command interpreter INTERNER BUS..........................Fehler! Textmarke nicht definiert. 
1.1 Data telegrams........................................................Fehler! Textmarke nicht definiert. 
2 Command interpreter MODBUS RTU............................................................................... 14 
2.1 Measuring values (Input Register).............................................................................. 15 
2.2 Commands (Holding Register) ................................................................................... 19 
3 Commands and description.............................................................................................. 20 
3.1 Command AI.............................................................................................................. 20 
3.2 Command BR............................................................................................................. 22 
3.3 Command CI...........................................................Fehler! Textmarke nicht definiert. 
3.4 Command DC ............................................................................................................ 22 
3.5 Command DO............................................................................................................ 22 
3.6 Command FB............................................................................................................. 23 
3.7 Command HP............................................................................................................. 24 
3.8 Command ID.............................................................................................................. 24 
3.9 Command KY............................................................................................................. 24 
3.10 Command LC.......................................................................................................... 25 
3.11 Command RS ......................................................................................................... 25 
3.12 Command SH ......................................................................................................... 26 
3.13 Command SV.......................................................................................................... 26 
3.14 Command TR.......................................................................................................... 27 
3.15 Command TT.......................................................................................................... 27 
3.16 Command TZ.......................................................................................................... 28 
7LED signals............................................................................................................................. 29 
8Technical data......................................................................................................................... 30 
9Dimension drawing [in mm]..................................................................................................... 33 
Accessories (optional)............................................................................................................. 34 
 

4 / 34 ba_7-1-120/11E/0318

Tables

Table 1 : Status word .................................................................Fehler! Textmarke nicht definiert.

Table 2 : Measured value telegram............................................Fehler! Textmarke nicht definiert.

Table 3 : Sensor data telegram ..................................................Fehler! Textmarke nicht definiert.

Table 4 : MODBUS Frame .............................................................................................................14

Table 5: MODBUS Exceptions .......................................................................................................15

Table 6 : MODBUS Input Register..................................................................................................18

Table 7 : List of commands ............................................................................................................20

Figures

Figure 1 : LEDs..............................................................................................................................29

Figure 2 : Spectrum of brightness sensors.....................................................................................32

Figure 3 : Directional characteristics of brightness sensors............................................................32

Figure 4 : Spectrum for global irradiance sensor ............................................................................33

Instructions for use

These instructions for use describe all application and adjustment options for the device.

These detailed instructions allow users to modify the factory settings to their needs via the serial

interface of the Weather Station Compact WS3/O.

Scope of supply

1 Weather Station Compact WS3/O.

1 Copy of the instructions for uses.

5 / 34 ba_7-1-120/11E/0318

1 Device version

Designation

Order No.

Output

terminal

Data format

Operating voltage

WETTERSTATION

COMPACT WS3/O

WS3/O-MB

1 x RS485

Data in binary format

(command interpreter:

MODBUS RTU)

18...30V DC

18...28V AC

2 Application

The WEATHER STATION COMPACT WS3/O is designed for use in building services automation

systems (e.g. shade protection control). The WS3/O features the following measured variables:

•Wind speed.

•Wind direction.

•4 x brightness (north / east / south / west).

•Twilight.

•Global irradiance.

•Precipitation.

•Air temperature.

•Absolute air pressure.

•Relative air pressure.

•Time / date.

•Geostationary data (local altitude, longitude and latitude).

•Position of the sun (elevation / azimuth).

•Relative air humidity.

•Absolute humidity.

•Dew-point temperature.

•Inside temperature of housing.

The interface to the device is digital and consists of an RS485 interface in half-duplex mode.

Together with ID-based communications the interface allows the Weather Station to be operated in

a bus.

6 / 34 ba_7-1-120/11E/0318

3 Structure / Mode of operation

Wind speed / wind direction:

Wind measurement is based on the hot wire principle. The underside of the housing is equipped

with a heated cylindrical sensor. A PID controller adjusts the temperature of the cylinder to a

temperature that is constantly increased in relation to the environment. The supplied heat energy is

a measure of wind speed.

The metal cylinder contains four temperature-measuring resistors. These resistors are thermally

coupled with the cylinder and positioned according to the 4 points of the compass. When an

incident flow affects the cylinder as a function of the wind direction, this is accompanied by a

temperature gradient which is registered by the measuring resistors. The relationships between the

4 temperature values are used to calculate the wind direction.

In case the wind direction cannot be determined because the wind velocity is 0m/s, the value is set

to 0. Wind from the north is displayed with 360°.

Brightness:

The brightness measurement is carried out via 4 Silicium photo sensors, which are aligned to the

4 cardinal directions in the mean elevation angle (40°).

Twilight:

Twilight means the light diffusion in the atmosphere, which arises with the smooth transition

between day and night before the beginning or after the end of day.

i.e., the solar disc is not visible.

The twilight is direction-independent.

It is calculated from the sum of the 4 measuring values of the direction-independent brightness

sensors.

A change to the mean value from the 4 brightness values is possible by command.

Global irradiance:

A silicon PIN photodiode is used to measure global irradiance. The sensor is positioned horizontally

and registers the diurnal values of the solar irradiation intensity.

Precipitation:

The detection of precipitation is based on capacitance measurement, i.e. the capacity of the sensor

surface varies when wet. The sensor is installed in the housing cover. An integrated heating system

adjusts the sensor area to an overtemperature in relation to the ambient temperature. This

overtemperature (approx. 2K) prevents bedewing of the sensor surface. The thermal output is

increased with precipitation. This accelerates drying of the sensor, allowing the time at which

precipitation ended to be identified more accurately.

7 / 34 ba_7-1-120/11E/0318

Air temperature:

A PT1000 measuring resistor is used to measure the air temperature. The sensor is mounted on a

flexible printed board and positioned in the lower section of the housing.

Air pressure:

Absolute air pressure is measured with a piezoresistive MEMS sensor.

To make a meaningful comparison between air pressure values simultaneously measured at

different locations, they need to be converted to a common datum (height above sea level). The

calculation is referred to the height above sea level (QNH) according to the international altitude

formula (DIN ISO2533).

Ph= air pressure at local altitude

Pb= air pressure at height above sea level



= -0065K/m

gn= 9.80665m/s2

R = 287.05287m2/K/s2

Tb= 288.15K

The station height, required for the calculation, can be entered manually by the Command SH, or

can be determined automatically by GPS.

If you want to achieve an accuracy of 0.1hPa, referred to sea level, the local altitude (altitude of the

baro transmitter) must be given up to an accuracy of 0.8m.

Time / date and geostationary data:

The Weather Station has a GPS receiver with a built-in RTC. This allows it to receive the position of

the Weather Station (degree of longitude/latitude, local altitude) time (UTC) and date. The GPS

receiver does not need alignment.

The built-in RTC (Real Time Clock) is buffered with a backup capacitor and retains its data without

a voltage supply for a period of minimum 3 days.

Position of the sun (elevation / azimuth):

On the basis of the GPS data the current sun position is calculated every second.

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8 / 34 ba_7-1-120/11E/0318

Humidity measurement:

A built-in hygro-thermosensor is used to measure humidity levels. The sensor has a small air

exchange volume thanks to its compact design and responds to changes in humidity in seconds.

A software module uses the relative humidity and air temperature to calculate absolute humidity

and the dew-point temperature.

Inside temperature of housing:

A silicon temperature sensor measures the temperature inside the housing.

GPS-Receiver:

The weather station has a GPS receiver with integrated RTC (Real Time Clock) for receiving the

position of the weather station, and time + date (UTC).

An alignment of the GPS receiver is not necessary.

The integrated RTC is buffered for a period of 3 days.

General information:

After activation of the WS3/O the first satellite data are available after approx. 2.5min.

When receiving the signals from one satellite: time with an accuracy of < 1µs.

When receiving the signals from three satellites: position with an accuracy of < 20m

When receiving the signals from four satellites: altitude, referred to the WGS84-

ellipsoid, with an accuracy < 30m

4 Installation of COMPACT WS3/O Weather Station

Please note:

The working position of the COMPACT WS3/O Weather Station

is horizontal (plug connection underneath).

During installation, de-installation, transport or maintenance of

the COMPACT WS3/O Weather Station make sure that no water

gets into the device and connector.

4.1 Selection of installation site

An exposed position should be selected for this site. Measurement properties should not be

influenced by light reflections, cast shadows or the device being positioned in the lee of the wind.

Protection against lightning and overvoltages should also be provided by the customer.

9 / 34 ba_7-1-120/11E/0318

4.2 Mechanical installation

The intended installation of the Weather Station WS3/O requires the use of a pipe socket / pipe

with an outside diameter of ≤25mm. The inside diameter must be ≥19mm to admit the

connector and cable.

Tool:

Hexagon socket wrench SW2mm

(socket wrench).

Procedure:

1. Push cable/plug connection

through the bore hole of the mast,

tube, bracket etc.

2. Put WS3/O on mast, tube.

3. Align WS3/O to “north”.

(Procedure see chapter 4.2.1).

4. Secure WS3/O by the M4-

hexagon socket screw.

Attention:

The hexagon

socket screw

is to be

tightened by

max. 0.6Nm.

When using the

mounting angel (see chapter

accessories) the guide angles must be

removed, see fig.

The mounting angle is not included in

delivery.

Remark: Tube and mounting angle are not included in delivery.

10 / 34 ba_7-1-120/11E/0318

4.2.1 Alignment to north

For the exact determination of wind- and brightness direction the WEATHER STATION COMPACT

WS3/O must be mounted in north alignment (geographic north).

The hexagon socket screw serves as

north marking (N)

Tool:

Hexagon socket wrench SW 2mm

(socket wrench).

Procedure:

1. Detect a prominent object in the

surrounding area (tree, building

etc.) in north direction by means of

a compass.

2. Via the north marking (N) and an

imaginary north-south axis the

weather station is to be located on

the prominent object.

3. Align weather station.

The north marking must indicate to

the geographic north.

4. In case of match the weather

station is to be secured by an M4-

hexagon socket screw.

Attention:

The hexagon socket

screw is to be tightened

by max. 0.6Nm.

Remark:

With the north alignment by means of a compass, the local variation (deviation in direction of a

compass needle from the true north direction) by interfering magnetic fields, and magnetic field

influences by hardware and electric cable are to be considered.

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