Lufft V200A-UMB User Manual

Operating Manual V25/09.2019 Ventus / Ventus-X / V200A
Chapter 20 Appendix 40
20.3 Communication in Binary Protocol
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 operation of
the protocol (available for download at www.lufft.com).
Note: Communication with the sensor takes place in accordance with the master-slave
principle, i.e. there may only be ONE requesting unit on a network.
20.3.1 Framing
The data frame is constructed as follows:
SOH Control character for the start of a frame (01h); 1 byte
<ver> Header version number, e.g.: V 1.0 <ver> = 10h = 16d; 1 byte
<to> Receiver address; 2 bytes
<from> Sender address; 2 bytes
<len> Number of data bytes between STX and ETX; 1 byte
STX Control character for the start of payload transmission (02h); 1 byte
<cmd> Command; 1 byte
<verc> Version number of the command; 1 byte
<payload> Data bytes; 0 – 210 bytes
ETX Control character for the end of payload transmission (03h); 1 byte
<cs> Check sum, 16 bit CRC; 2 bytes
EOT Control character for the end of the frame (04h); 1 byte
Control characters: SOH (01h), STX (02h), ETX (03h), EOT (04h).
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)
Bits 11 – 8
(middle 4 bits)
Bits 7 – 0 (lower 8 bits)
Class ID (0 to 15)
Reserve
Device ID (0 – 255)
0
Broadcast
0
Broadcast
8
Ventus
1 - 255
Available
15
Master or control devices
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.
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:
1
2
3 - 4
5 - 6
7
8
9
10
11 ... (8 + len)
optional
9 + len
10 + len
11 + len
12 + len
SOH
<ver>
<to>
<from>
<len>
STX
<cmd>
<verc>
<payload>
ETX
<cs>
EOT

Lufft V200A-UMB Specifications

General

Brand	Lufft
Model	V200A-UMB
Category	Accessories
Language	English

Summary

1 Please Read Before Use

1.1 Symbols Used

Explains symbols indicating hazards and correct operation.

1.2 Safety Instructions

Installation by qualified personnel; avoid touching live parts.

1.3 Designated Use

Equipment must be used within specified data and for designed purposes.

1.4 Incorrect Use

Describes consequences of incorrect installation or connection.

1.5 Warranty

Warranty period is 12 months; forfeited if use is violated.

1.6 Brand Names

Refers to valid trademark and ownership rights of respective owners.

2 Scope of Supply

3 Order Number

4 Accessories

5 Additional Documents and Software

6 Equipment Description

6.1 Wind

Explains wind measurement principle using time of flight of ultrasonic pulses.

6.2 Virtual Temperature

Determines ambient temperature via sound propagation velocity.

6.3 Air Pressure

Measures air pressure using an integrated sensor.

6.4 Heating

Heating elements for winter operation to prevent icing.

6.4.1 Heating mode

Details the 4 operational modes for heating control.

6.4.2 Heating capacity

Explains settings for heating capacity (full or alternating).

6.4.3 Heater Turn Off on Over / Under Voltage

Automatic heating shutoff based on voltage thresholds.

7 Generation of Measurements

7.1 Current Measurement (act)

Transmits the last measurement value based on sampling rate.

7.2 Minimum and Maximum Values (min and max)

Calculates and transmits min/max values from the circular buffer.

7.3 Average Value (avg)

Calculates and transmits average values from the circular buffer.

7.4 Vectorial Average Value (vct)

Calculates vectorial average for wind speed and direction.

8 Measurement Output

8.1 Virtual Air Temperature

Details sampling rate, units, and channels for virtual temperature.

8.2 Heating Temperature

Details sampling rate, units, and channels for heating temperatures.

8.3 Air Pressure

Details sampling rate, units, and channels for air pressure.

8.3.1 Air Density

Explains air density calculation and dependency on relative humidity.

8.4 Wind Speed

8.4.1 Wind Gust Speed (WMO Specification)

Defines wind gust speed calculation and conditions.

8.5 Wind Direction

8.6 Wind Measurement Quality

8.7 Status Information

9 Installation

9.1 Fastening

Describes how to fasten the sensor to the mast.

9.2 North Alignment

9.3 Selecting the Installation Location

9.3.1 General Instructions

Guidelines for selecting a stable, accessible installation location.

9.3.2 Installation of Ventus

Specifies installation height and free field requirements.

10 Connections

Pin assignment full duplex

Details pin assignments for the 8-pole connector.

Pin assignment half duplex/analog interface

Details pin assignments for half duplex and analog interfaces.

Pin assignment SDI-12 interface

Details pin assignments for the SDI-12 interface.

10.1 Supply Voltage

10.2 RS485 Interface

10.3 Analog Interface Circuits

10.4 Control line

10.4.1 Control line disabled

Explains that the control line has no effect when disabled.

10.4.2 Heating control

Describes how the control line affects heating.

10.4.3 Control of telegram transmission in NMEA protocol

How control line affects NMEA telegram transmission.

10.5 Connection to ISOCON-UMB (8160.UISO)

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

10.7 SDI12 Connection

11 Commissioning

12 Configuration and Test

12.1 Lufft ConfigTool

Introduces the software for configuration and testing.

12.2 Configuration

Details various configuration settings for the device.

12.2.1 Sensor selection

Describes how to add and select a new device in the software.

12.2.2 Device settings

Overview of all Ventus parameters and their settings.

12.2.3 Device identification

Settings for identifying devices like Device ID and description.

12.2.4 Device parameters

Configuration of parameters like baudrate and protocol.

12.2.5 Communication parameters

Settings for various communication protocols like MODBUS, NMEA, SDI-12.

12.2.6 Heating Parameters

Configuration of heating setpoint, mode, and capacity.

12.2.7 Wind Parameters

Configuration of wind measurement parameters like min. speed and direction offset.

12.2.8 Pressure Parameters

Configuration of pressure measurement parameters like offset.

12.2.9 Analog outputs

Configuration of analog output parameters and scaling.

12.3 Value retrieval

Instructions for retrieving measurement data using the software.

13 Firmware Update

14 Maintenance

15 Technical Data

15.1 Measuring Range / Accuracy

Details the measuring ranges and accuracy for various parameters.

15.2 Drawing

Provides a dimensional drawing of the Ventus sensor.

16 EC Declaration of Conformity

17 Fault Description

18 Disposal

19 Repair / Corrective Maintenance

19.1 Technical Support

Contact information and resources for technical assistance.

20 Appendix

20.1 Channel List Summary

Lists channels for binary and ASCII protocol data requests.

20.2 Channel List Summary per TLS2002 FG3

Lists channels for TLS format data requests in binary protocol.

20.3 Communication in Binary Protocol

Details framing, addressing, and examples for binary protocol.

20.4 Communication in ASCII Protocol

Explains structure, commands, and standardization for ASCII protocol.

20.5 Communication in NMEA Protocol

Covers NMEA structure, commands, telegram types, and modes.

20.6 Communication in SDI-12 Mode

Details SDI-12 preconditions, modes, and commands.

20.7 Communication in Modbus Mode

Explains Modbus integration, parameters, functions, and register mapping.

21 List of Figures

22 Keyword Index