Dyacon UA-1 User manual

UA-1
Ultrasonic
Anemometer
Manual
57-6108 Rev A

DYACON UA-1 Manual
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DYACON UA-1 Manual
Contents
1.0 NOTICES...............................................................................................................................................5
1.1.1 © Copyright 2022 Dyacon, Inc..............................................................................................5
1.1.2 Manufacturer..........................................................................................................................5
1.1. Declarations...........................................................................................................................6
1.1.4 Warranty Information............................................................................................................6
2.0 UA-1 INTRODUCTION.......................................................................................................................8
2.1 Scope................................................................................................................................................8
2.2 Technical Support............................................................................................................................8
2.2.1 Contact Information...............................................................................................................8
2.2.2 Phone / Email Support...........................................................................................................8
3.0 PRODUCT OVERVIEW......................................................................................................................9
.1 Product Description..........................................................................................................................9
.2 What Do You Get?.........................................................................................................................10
. What You Need..............................................................................................................................10
.4 Accessories.....................................................................................................................................11
4.0 ASSEMB Y INSTRUCTIONS..........................................................................................................12
4.1 Required Tools...............................................................................................................................12
4.2 Mounting........................................................................................................................................12
4. Wiring............................................................................................................................................16
4. .1 Wiring Configuration...........................................................................................................16
4. .2 Wiring Table........................................................................................................................17
4. . Internal Wiring.....................................................................................................................17
5.0 MODBUS..............................................................................................................................................18
5.1 Modbus Summary..........................................................................................................................18
5.2 Modbus Utilities.............................................................................................................................18
5. Modbus Electrical Connection.......................................................................................................19
5. .1 Bus Connection....................................................................................................................19
5. .2 Termination..........................................................................................................................19
5.4 Modbus Protocol............................................................................................................................2
5.5 Data Format....................................................................................................................................25
5.5.1 Wind Speed Format.............................................................................................................25
5.5.2 Wind Direction Format........................................................................................................25
5.6 Conversions and Calculations........................................................................................................25
5.6.1 Speed Unit Conversions.......................................................................................................25
6.0 THEORY OF OPERATION..............................................................................................................26
6.1 Wind Speed and Direction Sensing...............................................................................................26
6.2 Practical Considerations.................................................................................................................26
6.2.1 Wind Speed Sensing............................................................................................................26
6. Boot Up..........................................................................................................................................26
7.0 UA-1 SPECIFICATIONS...................................................................................................................27
7.1 Wind Speed....................................................................................................................................27
7.2 Wind Direction...............................................................................................................................27
7. Electrical........................................................................................................................................27
7.4 Mechanical.....................................................................................................................................27
7.5 Data Output....................................................................................................................................28
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DYACON UA-1 Manual
7.6 Environmental................................................................................................................................28
7.7 Accessories.....................................................................................................................................28
8.0 REVISION HISTORY........................................................................................................................29
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DYACON UA-1 Manual Notices
1.0 Notices
1.1.1 © Copyright 2022 Dyacon, nc.
All Rights Reserved
This publication is protected by copyright and all rights are reserved. Any reproduction of this
manual, in part or in full, by any means, mechanical, electronic, or otherwise, is strictly
prohibited without express written permission from Dyacon, Inc.
The information in this manual has been carefully checked and is believed to be accurate.
However, Dyacon, Inc. assumes no responsibility for any inaccuracies that may be contained in
this manual. All information is subject to change.
Trademark Acknowledgments
DYACON® and Dyacon® is a registered trademark of Dyacon, Inc.
Dyacon UA-1TM, UATM are trademarks of Dyacon, Inc.
All other trademarks are property of their respective owners.
1.1.2 Manufacturer
Dyacon, Inc.
1770 Research Park Way, Suite 168
Logan, UT 84 41
USA
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Notices DYACON UA-1 Manual
1.1.3 Declarations
Dyacon UA-1TM is a low-power electronic industrial device.
RoHS
All electronic and mechanical components conform to RoHS, Directive 2002/95/EC.
FCC CFR Part 15
This equipment complies with the limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a commercial installation.
1.1.4 Warranty nformation
Limited Hardware Warranty
Dyacon, Inc. warrants that all Dyacon products and components shall be free from defects in
materials and workmanship for a period of two (2) years from the date of shipment when
installed according to instruction manuals accompanying said hardware and used for the purpose
for which said hardware was designed. In the event a defect in materials or workmanship is
discovered and reported to Dyacon within the warranty period, Dyacon will at its option repair
the defect or replace the defective product. This warranty does not apply where the product has
been operated outside the specifications of the product. Dyacon’s obligation hereunder will be
limited to such repair or replacement. Customers shall have the responsibility to ship the
defective equipment to Dyacon at its (customer’s) expense, with all cost of shipment prepaid.
Dyacon will ship the repaired or replaced item at its (Dyacon’s) expense using the preferred
shipment method of Dyacon.
Disclaimer of Warranties
The warranties set forth above are in lieu of all other warranties of Dyacon, whether written,
oral, or implied. Dyacon makes no warranties regarding its products (hardware or software),
including without limitation warranties as to merchantability, fitness for a particular purpose,
any warranty arising from course of performance, course of dealing or usage of trade whether
any of the foregoing warranties are either expressed or implied. Dyacon specifically makes no
warranties as to the suitability of its products for any particular application. Dyacon shall in no
event be liable for performance, or use of any product covered by this agreement whether such
claim is based upon warranty contract (express or implied), strict liability, negligence, or
otherwise. Any responsibility and/or liability of Dyacon shall, in connection with a warranted
product, be limited in maximum amount to the original purchase price of that product.
Removal of Serial Number
Removal of the original serial number label or reprogramming of the electronic serial number
voids any warranty on the device. Dyacon will not repair or update products if the serial number
label missing or legitimate ownership cannot be verified. Dyacon may not return equipment that
is missing serial numbers or where legitimate ownership is in question.
Updates or Modifications
Dyacon shall be under no obligation to update or modify its products except as herein noted to
correct defects or errors. Customer agrees that all representation and warranties contained herein
shall be immediately null and void in the event of any incorrect installation, modification,
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DYACON UA-1 Manual Notices
alteration, or change in or to any product affected by or on behalf of customer except for a
change made by Dyacon or other direct supervision thereof.
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UA-1 ntroduction DYACON UA-1 Manual
2.0 UA-1 Introduction
2.1 Scope
The content of this document is intended for integrators, installers, and users of UA-1TM,
hereinafter referred to as UA or “wind sensor”.
This document includes installation instructions, technical specifications, electrical
requirements, and data protocol information. Some aspects of the equipment operation may be
covered in other documents. Please contact Dyacon or visit the Dyacon.com website.
2.2 Technical Support
2.2.1 Contact nformation
Dyacon, Inc.
1770 Research Park Way, Suite 168
Logan, UT 84 41
Phone: [phone]
Email: [e-mail]
Internet: www.dyacon.com
Normal business hours are from 8:00 am to 5:00 pm. (Mountain Time Zone, GMT -0700)
2.2.2 Phone / Email Support
If you need technical support via the phone or email, please have the following information
ready:
Product name, model number, and serial number.
Your name and name of the purchaser of the equipment.
Name of company, institution, or agency.
Phone number, email address.
Billing and Shipping address.
A clear description of the question or problem.
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DYACON UA-1 Manual Product Overview
3.0 Product Overview
3.1 Product Description
Dyacon UA-1TM is an ultrasonic anemometer developed by Calypso Instruments with
modifications by Dyacon. The wind sensor may be used as a standalone sensor, a component of
Dyacon weather station, or integrated into other automated equipment.
UA-1 is a digital sensor, sending instrument data and receiving control commands via a digital
serial port using Modbus-RTU protocol over TIA-485-A (RS-485). Consequently, there is no
measurement degradation due to cable length.
UA-1 is easily mounted on the end of a vertical /4” pipe with no additional hardware. Other
fittings and mounting adapters may be developed as needed.
Sensor Protocol Descriptions
Modbus-RTU (RS-485) is an electrically robust protocol used in automation systems, such as
programmable logic controllers (PLCs). UA uses a default data rate of 19200 bps, ensuring
adequate data throughput while extended cable length capability.
Design Objectives
The design for UA-1 was designed to meet the following objectives.
•Minimize installation hardware and complexity
•Flexible cable routing – The cable can be routed inside or outside of the mounting pipe.
•Reduce wear components
•No wind direction dead spots
•Durable construction
•Field serviceable – Cable may be replaced by the user.
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Product Overview DYACON UA-1 Manual
3.2 What Do You Get?
UA-1 ships with:
Instrument assembly
5 m (20 ft) cable (Custom lengths available.)
Cable ties
3.3 What You Need
In order to utilize the UA-1 you will need the following.
/4” diameter mounting SCH40/IPS pipe (aluminum, steel, or PVC) Actual outer pipe
diameter is 1.04 inch (26.7 mm). The wind sensor fits directly on top of Dyacon Tripod-1
and QDT (Quick-deployment Tripod).
5 to 18 VDC power supply and Modbus host device.*
* Sensor is powered directly by the Dyacon weather station controller.
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Image 3.1: As Shipped

DYACON UA-1 Manual Product Overview
3.4 Accessories
Dyacon Crossover
Dyacon crossover can be used for mounting the wind sensor to a horizontal pipe or on a flat
surface.
Structural Pipe Fittings
Standard structural pipe fittings for 1” schedule 40 pipe are available from hardware suppliers
and manufacturers.
Hollaender Nu-Rail www.nurail.com
J.C. Denier www.denierco.com
Easyfit www.easyfit.com
Diamond Aluminum www.diamond-aluminum.com
KEE Systems www.keesystems.com
McMaster-Carr www.mcmaster.com
Grainger www.grainger.com
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Image 3.2: Sample Structural Pipe Fittings.

Assembly nstructions DYACON UA-1 Manual
4.0 Assembly Instructions
4.1 Required Tools
Slotted screw driver or 5/16” (8 mm) nut driver to secure the device to a mounting pipe.
Wire cutters to trim cable ties.
4.2 Mounting
UA-1 is designed to fit on a /4” nominal diameter schedule 40 pipe, actual outer diameter of
1.06” (26.9 mm).
UA-1 fits on the end of the Dyacon tripod and snaps into the locking button without any tools.
(See Image .)
The data cable may be passed through the center of the mounting pipe or outside of the
mounting pipe. (See Image 2.)
A knock-out slot is provided inside of the UA connector compartment.
1. Slide the mounting adapter over the pipe.
2. Align the body of the wind sensors to orient north.
For convenience, an alignment hole is is provided. When a rod is inserted, it points south.
When aligning the anemometer, users will stand on the south side of the anemometer
looking north.
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DYACON UA-1 Manual Assembly nstructions
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Assembly nstructions DYACON UA-1 Manual
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DYACON UA-1 Manual Assembly nstructions
The alignment hole is sized to accept a large drinking straw such as can be found at
McDonald’s, BurgerKing, and other locations that sell ice cream shakes and malts.
. Tighten the band clamp using the slotted screw driver or nut driver.
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Assembly nstructions DYACON UA-1 Manual
4. Attach cable ties at about 6 in (15 mm) below the wind sensor and every 24 in to 6 in (45
t0 100 mm) along the mast or structure. Route cable to avoid sharp edges or unsupported
horizontal spans.
4.3 Wiring
4.3.1 Wiring Configuration
UA-1 ships with shielded, 4-conductor, outdoor-rated instrumentation cable. The RS-485
(Modbus) connection is a two-wire, half-duplex configuration.
In RS-485 networks, the signal polarity is indicated by a '+' or 'A' and the opposite signal is
indicated by a '-' or 'B'. Some systems use a two-wire configuration and other systems use a
four-wire configuration. Dyacon sensors use a two-wire configuration.
When connecting a Dyacon sensor to a four-wire device, the transmit and receive signals for
each signal polarity are tied together. This means that TX+ and RX+ are tied together on the
host controller as are TX- and RX-.
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DYACON UA-1 Manual Assembly nstructions
4.3.2 Wiring Table
Red 5 to 18 VDC
Orange A (+)
Brown B (-)
Black Electrical ground
Unshielded Drain/earth ground
4.3.3 nternal Wiring
The cable terminates inside of the USWD body using a small pluggable terminal block.
The UA cover can be removed by removing the screw from the center hold and inserting it
partially into the adjacent hole. This allows the screw to become a handle for removing the cover
and reduces the potential for the loose part to become lost.
The same wire color order is used for the
internal connector.
The bare drain wire is not used on the internal
connector.
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Image 4.1: Wired for D acon Control Module

Modbus DYACON UA-1 Manual
5.0 odbus
5.1 Modbus Summary
Modbus is a simple protocol that can be transmitted over several modes including TCP/IP, TIA-
2 2-A (RS-2 2), TIA-485-A (RS-485), TCP/IP, SMS, and many others.
DYACON UA-1 uses Modbus-RTU over RS-485.
UA-1 is a slave device and must be connected to a host device, such as a programmable logic
controller (PLC), host computer with an RS-485 adapter and Modbus software, or to the
DYACON weather station control module.
RS-485 is a robust, differential pair electrical protocol that is noise immune and capable of long
cable runs. With twisted pair cabling, such as CAT-5, distances over 1200 m (4,000 ft) can be
achieved. UA-1 can be configured for 1200 bps or 2400 bps to extend the range. Relatively long
runs are achievable even without twisted pair cables.
The wide operating voltage range and low power of UA-1 allows for power to be injected over
the same data cable without concern for excess voltage drop. (Two wires for power and two for
data.)
For example, 1200 m (4000 ft) of Cat-5 cable (24 AWG) will result in a voltage drop of less
than 0.2 V at an operating current of 2 mA.
UA-1 ships standard with 20 ft (5 m) of non-paired, outdoor-rated cable.
5.2 Modbus Utilities
The address of the sensor and other parameters are configurable. A Modbus computer utility
may be required to change these settings. A number of utilities are available including:
ModBus Constructor www.kurysoft.com
Simply Modbus www.simplymodbus.ca
ModbusTools www.modbustools.com
Only ModBusConstructor and the companion ModbusReader have been tested with the Dyacon
product. Contact [e-mail] for copies of the constructor files.
A list of Modbus software can be found at: www.modbus.org/tech.php
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DYACON UA-1 Manual Modbus
5.3 Modbus Electrical Connection
5.3.1 Bus Connection
Dyacon devices use a two-wire (half-duplex) electrical connection.
The Modbus port is a slave port that can be connected to a Modbus Host or Master.
Pin 1 – RS-485 RX/TX+ (A)
Pin 2 – RS485 RX/TX- (B)
Connecting to 4-wire Master
When connecting the sensor to a 4-wire master, install a jumper between the RX+ and TX+ as
well as between RX- and TX-. The Master device may have to be configured to operate in half-
duplex mode. Refer to the instructions for your equipment for half-duplex and full-duplex
settings.
5.3.2 Termination
RS-485 (EIA-485) networks require a termination resistor of 120Ω. A termination resistor is not
used on Dyacon sensors. Depending on the bus, a termination resistor may be needed.
Additional bias resistors may also be needed.
Modbus is based on a bi-directional RS-485 data bus. Since the bus is bi-directional, anytime
either the master or slave is not driving the bus, the bus floats. If the bus has termination
resistors on it (as it should) the two lines will be at the same voltage if no other device is
transmitting. While Dyacon equipment utilizes full fail-safe (Open, Short, Terminated/Floating)
RS-485 transceivers, this is not the case with all equipment. Some equipment needs a bias on the
RS-485 lines to prevent the bus from being interpreted as being active while it floats. This can
be even more important in a noisy environment.
The following would be a common biasing and termination circuit. While this circuit works well
in most situations, adjusting the resistors may be needed depending on the bus configuration,
other termination resistors on the bus, and the operating voltage. Modbus Commands
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RX+
TX+
RX-
TX-
RX/TX+
RX/TX-
Modbus Master CM-1
+V
RX/TX+
RX/TX-
R1 Ω
120 Ω
680 Ω
GND
+V R1 Value
5 V 680 Ω
12 V 1.3 kΩ

Modbus DYACON UA-1 Manual
UA is a Modbus slave device, the Modbus host must request data from the sensor.
The following describes the Modbus commands and messages. The basic instructions should be
adequate for Modbus host programming. For embedded developers, additional protocol details
are contained in the Modbus Appendix.
The default configuration:
Modbus address 01
Serial Data Parameters 19200, 8-bit data, no parity, 1 stop bit
Supported Functions and Exception Codes
Function Description Supported Error and Exception codes*
Read Holding Register 0x8 : 01, 02, 0 , 04
4 Read Input Register 0x84: 01, 02, 0 , 04
6 Write Single Register 0x86: 01, 02, 0 , 04
16 Write Multiple Registers 0x90: 01, 02, 0 , 04
* See Error Code table below for more information.
Sensor Data Requests
Address Register Access Type Response
Range
Data Type Description
201 202 Read 0 to 500* 16-bit Signed Int Wind speed (m/s)
202 20 Read 0 to 599* 16-bit Signed Int Wind direction (°)
20 204 Read 0 to 500 16-bit Signed Int 2 min avg wind speed
204 205 Read 0 to 599 16-bit Signed Int 2 min avg wind direction
205 206 Read 0 to 500 16-bit Signed Int 10 min avg wind speed
206 207 Read 0 to 599 16-bit Signed Int 10 min avg wind direction
207 208 Read 0 to 500 16-bit Signed Int Wind gust speed
208 209 Read 0 to 599 16-bit Signed Int Wind gust direction
† See System Status Code section below.
* See Data Format section for numeric conversions.
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