Adcon A725 addSDI Manuale utente

A725 addSDI

User Manual

SMART WIRELESS SOLUTIONS

Proprietary Notice:

The Adcon logo, addSDI™, addIT™, addWAVE™, addVANTAGE™, addVANTAGE Profes-

sional™ and AgroExpert™ are trademarks or registered trademarks of Adcon Telemetry. All

other registered names used throughout this publication are trademarks of their respective own-

ers.

Neither the whole nor any part of the information contained in this publication may be repro-

duced in any material form except with the prior written permission of Adcon Telemetry.

This publication is intended only to assist the reader in the use of the product. Adcon Telemetry

shall not be liable for any loss or damage arising from the use of any information in this publica-

tion, or any error or omission in such information, or any incorrect use of the product.

Document Release 1.0, Dezember 2006

ADC NO

T E L E M E T R Y

ADCON TELEMETRY GMBH

I N K U S T R A S S E 2 4

A-3400 KLOSTERNEUBURG

A U S T R I A

TEL: +43 | 2243 | 38280-0

FAX: +43 | 2243 | 38280-6

h t t p : / / w w w . a d c o n . a th t t p : / / w w w . a d c o n . a t

2050 LYNDELL TERRACE

S U I T E 1 2 0

C A - 9 5 6 1 6 D A V I S , U S A

TEL: +1 | 530 | 753-1458

FAX: +1 | 530 | 753-1054

h t t p : / / w w w . a d c o n . a th t t p : / / w w w . a d c o n . a t

ADCON INTERNATIONAL INC

ENFIELD PLAZA SA 5058

P O B O X 6 0 5

A D E L A I D E A U S T R A L I A

TEL: +61 | 8 | 8260-4682

FAX: +61 | 8 | 8260-4685

h t t p : / / w w w . a d c o n . a th t t p : / / w w w . a d c o n . a t

ADCON AUSTRALIA PTY. LTD.

CHAPTER 1

About the A725 addSDI___________________________________________________3

Conventions _____________________________________________________________4

Opening the packages____________________________________________________5

Installing the RTU ________________________________________________________6

Field Installation_______________________________________________________7

More about the LED tool _______________________________________________8

Configuring an addSDI RTU in the addVANTAGE software__________________9

Maintaining and servicing the RTU__________________________________________9

The RTU battery_______________________________________________________9

Changing the battery ________________________________________________ 10

Understanding connectors_______________________________________________ 14

The POWER Connector ______________________________________________ 14

The SDI Connector __________________________________________________ 15

SDI-12 Sensor Connections ______________________________________________ 16

Self powered Sensor _________________________________________________ 17

Multiple Sensors connected to the SDI-12 Bus __________________________ 18

Communicating with the RTU ____________________________________________ 18

Serial communication protocol ___________________________________________ 19

General format of a command ________________________________________ 19

General format of an answer __________________________________________ 20

Using terminal commands _______________________________________________ 20

Returned errors list _____________________________________________________ 37

Command line interpreter ____________________________________________ 37

Device descriptors and storage handler ________________________________ 37

Real time clock ______________________________________________________ 37

Radio interface ______________________________________________________ 37

Specifications _________________________________________________________ 39

CHAPTER

CHAPTER 1

About the A725 addSDI

Chapter 1. Introduction

This manual explains the hardware aspects of Adcon’s A725

addSDI Remote Telemetry Units, including installation issues and

certain parameter configurations. The manual is divided as follows:

•"Introduction," which contains some general information and

document conventions.

•"Using the A725 RTU," which details the installation and use

of the Remote Telemetry Unit.

•"Specifications," which describes operating parameters for the

devices.

About the A725 addSDI

The A725 Remote Telemetry Unit—RTU (commercial trademark

addSDI™

) is a low power, short range telemetry device, capable of

operating SDI-12 compatible sensors.

The frequency of operation is in the 432 to 470 MHz range, mak-

ing it compliant to most radio communication regulations in the

world. The output power is under 10 mW, while the modulation is

narrow band FM (12.5 or 25 kHz channel spacing).

Due to its construction, as well as to the software controlling it, the

power consumption is extremely low. The unit operates from a

built in 6.2 Volt rechargeable battery, which is charged either using

a solar panel or an external power supply adapter. A special con-

figuration may be implemented where no internal battery is used,

but the power is obtained exclusively over an external connector.

The SDI-12 bus is also powered by the internal 6.2 Volt battery,

therefore the attached SDI-12 sensors must be able to work within

CHAPTER 1

Introduction

a minimum voltage of 5.6V. This is lower than the official SDI-12

minimum operating voltage.

The A725 is a ruggedized unit, complying with the IP65 environ-

mental protection class (NEMA 4). It can easily be installed and it

integrates perfectly into an Adcon A733 network. Depending on

the terrain, it assures a reliable wireless connection to an A733

series device to distances up to 1000 meters, under favorable con-

ditions even more.

Conventions

Certain conventions apply in this document.

Italics

Indicate that the text is variable and must be substi-

tuted for something specific, as indicated in the expla-

nation. Italics can also be used to emphasize words as

words or letters as letters.

Bold Indicates special emphasis of the text. Also indicates

menu names and items in a window.

fixed font Indicates characters you must type or system mes-

sages.

FileSave Indicates menu selection. For example, select the File

menu, then the Save option.

Note Indicates information of interest. Notes appear after

the information they apply to.

CAUTION Indicates that you may get unexpected results if you

don’t follow the instructions. Cautions appear

before the information they apply to.

WARNING Indicates danger to yourself or damage to the device if

you don’t follow the instructions. Warnings appear

before the information they apply to.

Chapter 2. Using the addSDI

The A725 addSDI Remote Telemetry Unit (RTU) is part of the A7xx

series. For testing purposes, you should have an A840 Telemetry

Gateway installed before you install the A725 RTU. For informa-

tion about installing the A840, refer to the

Base Station, Telemetry

Gateway A840 and Wireless Modem A440 User Guide

Opening the packages

The addSDI RTU package contains the A725 RTU, an antenna, and

a pipe clamp. If ordered, the following items come in separate

packaging:

• A solar panel and pipe clamp

• A set of aluminum poles

• A LED tool

• Sensors and cables, one box for each sensor.

Make sure you have received all the equipment and read through

the instructions that follow. Once you are sure to understand

them, you are ready to install your RTU.

CHAPTER 2

Using the addSDI

Figure 1 shows the front view of an addSDI RTU.

Figure 1. addSDI RTU

 WARNING Do not turn or manipulate the Gore Prevent element!

The unit’s IP65 environmental protection may be affected.

Installing the RTU

The following restrictions apply:

• In general the typical “line-of sight” distance over which the

RTU can communicate is 1 km (.6 miles). This is valid if both

the RTU and its partner device are mounted on a 3 m mast (9

ft.); the results may vary under different conditions, and you

can sometimes achieve greater distances, sometimes shorter.

SDI-12

Connector

Solar

Panel

Gore PreventTM

CHAPTER 2

Installing the RTU

• As with all wireless communication devices, the higher the

transmitter is installed, the better the communication will be.

Field Installation

Installing addSDI RTUs in the field is a fairly simple process. You

can perform a connectivity check with a LED tool. The LED tool is

shown in Figure 2.

Figure 2. LED Tool

Note: The LED tool is a blind plug to be connected to the POWER

connector.

Follow these steps to install an addSDI RTU in the field:

1. Review the installation area and choose the best site.

2. Perform a connectivity check using the LED tool:

a. Insert the LED tool into the POWER connector and wait

up to 10 seconds. If the unit connects to at least one

station (or a base station), it will light up the LED for

about 4 seconds.

b. Keep observing the LED tool and, after another several

seconds, the LED will blink one or more times (the

number of blinks indicates the number of stations it has

contacted).

3. Assemble the mast from the set of poles.

4. Drive the tipped aluminum pole vertically into the ground,

using a sledge hammer. Put the “pole pounder” cap on top

of the pole to protect it from damage while hammering it in.

How far you drive the pole into the ground depends on your

application and the soil. Sandy soils in windy areas might

require guy wires to secure the pole.

5. Using a pipe clamp, fasten the solar panel onto the aluminum

mast. Make sure that the panel is facing south (north if you are

located in the southern hemisphere) and is out of the way of

the addSDI RTU.

CHAPTER 2

Using the addSDI

Note: The solar panel can be mounted under or behind the

addSDI RTU, but be sure that the RTU does not shadow the

panel.

6. Fasten the addSDI RTU to the top of the mast using another

pipe clamp. Adcon recommends that you perform another

connectivity test, if you can, to check the positioning of the

device.

 WARNING If you turn the fastening screws too tight, you might

damage the plugs.

7. Attach the SDI-12 sensor to the SDI jack and the solar panel to

the POWER jack by turning the connectors fastening screws

clockwise until secured tightly.

8. Secure access cable of the SDI-12 cable to the pole with cable

ties. To protect it from damage don’t let it sit on the ground!

This completes the installation of your addSDI RTU. If the SDI-12

jack is left unused, use the attached cap, meant to protect it

against moisture and dust. Be sure to make a note of the following

information because you’ll need it when you configure the device

in the software:

• Serial number of each RTU

• Type and address of SDI-12 sensors connected to each RTU

 WARNING The SDI-12 sensor addresses must be set prior to

attaching the sensors to the SDI-12 bus. Be sure to use unique

addresses only! There is no way to resolve address conflicts once

the sensors are attached to the SDI-12 bus.

More about the LED tool

The LED tool allows you to rapidly check the status of an addSDI

RTU. After you insert the LED tool into the POWER connector, the

unit waits for up to two seconds and then sends a broadcast frame.

If a nearby station or receiver decodes the frame, it will answer—

this may take up to 10 seconds. When an answer is received, the

LED tool lights up for about 4 seconds. A few seconds later, the

LED will light up again one or several times - once per station/

receiver that answered to its broadcast frame.

After that the LED continuously blinks briefly in 0.5 second inter-

vals to indicate that the unit is alive and that the internal battery

has enough energy to operate. If the blinking interval lengthens to

2 seconds, the battery has become undercharged (that is, under

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