SMAR TT400WH Manuale utente

Warning

III

NOTE

This manual is compatible with version 2.XX, where 2 denote software version and XX software release. The

indication 2.XX means that this manual is compatible with any release of software version 2.

Waiver of responsibility

The contents of this manual abides by the hardware and software used on the current equipment

version. Eventually there may occur divergencies between this manual and the equipment. The

information from this document are periodically reviewed and the necessary or identified corrections

will be included in the following editions. Suggestions for their improvement are welcome.

Warning

For more objectivity and clarity, this manual does not contain all the detailed information on the

product and, in addition, it does not cover every possible mounting, operation or maintenance

cases.

Before installing and utilizing the equipment, check if the model of the acquired equipment complies

with the technical requirements for the application. This checking is the user’s responsibility.

If the user needs more information, or on the event of specific problems not specified or treated in

this manual, the information should be sought from Smar. Furthermore, the user recognizes that the

contents of this manual by no means modify past or present agreements, confirmation or judicial

relationship, in whole or in part.

All of Smar’s obligation result from the purchasing agreement signed between the parties, which

includes the complete and sole valid warranty term. Contractual clauses related to the warranty are

not limited nor extended by virtue of the technical information contained in this manual.

Only qualified personnel are allowed to participate in the activities of mounting, electrical connection,

startup and maintenance of the equipment. Qualified personnel are understood to be the persons

familiar with the mounting, electrical connection, startup and operation of the equipment or other

similar apparatus that are technically fit for their work. Smar provides specific training to instruct and

qualify such professionals. However, each country must comply with the local safety procedures,

legal provisions and regulations for the mounting and operation of electrical installations, as well as

with the laws and regulations on classified areas, such as intrinsic safety, explosion proof, increased

safety and instrumented safety systems, among others.

The user is responsible for the incorrect or inadequate handling of equipments run with pneumatic

or hydraulic pressure or, still, subject to corrosive, aggressive or combustible products, since their

utilization may cause severe bodily harm and/or material damages.

The field equipment referred to in this manual, when acquired for classified or hazardous areas, has

its certification void when having its parts replaced or interchanged without functional and approval

tests by Smar or any of Smar authorized dealers, which are the competent companies for certifying

that the equipment in its entirety meets the applicable standards and regulations. The same is true

when converting the equipment of a communication protocol to another. In this case, it is necessary

sending the equipment to Smar or any of its authorized dealer. Moreover, the certificates are

different and the user is responsible for their correct use.

Always respect the instructions provided in the Manual. Smar is not responsible for any losses

and/or damages resulting from the inadequate use of its equipments. It is the user’s responsibility to

know and apply the safety practices in his country.

TT400 WirelessHARTTM – Operation, Maintenance and Instruction Manual

Table of Contents

TABLE OF CONTENTS

INTRODUCTION....................................................................................................................................... VII

INSTALLATION FLOWCHART ............................................................................................................... XIII

SECTION 1 - INSTALLATION ..................................................................................................................1.1

GENERAL................................................................................................................................................................... 1.1

MOUNTING ................................................................................................................................................................ 1.1

ELECTRIC WIRING ................................................................................................................................................... 1.2

INSTALLATION IN HAZARDOUS LOCATIONS........................................................................................................ 1.6

INTRINSICALLY SAFE .............................................................................................................................................. 1.6

SECTION 2 - OPERATION .......................................................................................................................2.1

FUNCTIONAL DESCRIPTION-HARDWARE............................................................................................................. 2.1

TEMPERATURE SENSORS...................................................................................................................................... 2.2

THERMOCOUPLES ..................................................................................................................................................................2.2

THERMORESISTANCES (RTDS).............................................................................................................................................2.3

THE DISPLAY ............................................................................................................................................................ 2.5

MONITORING ............................................................................................................................................................ 2.5

LOCAL ADJUSTMENT............................................................................................................................................... 2.6

WRITING PROTECTION ........................................................................................................................................... 2.7

SECTION 3 - MAINTENANCE ..................................................................................................................3.1

GENERAL................................................................................................................................................................... 3.1

DIAGNOSTICS WITH THE DISPLAY ........................................................................................................................ 3.1

PROBLEMS AND SOLUTIONS ................................................................................................................................. 3.1

DISASSEMBLY PROCEDURE .................................................................................................................................. 3.2

REASSEMBLY PROCEDURE ................................................................................................................................... 3.3

INTERCHANGEABILITY ............................................................................................................................................ 3.5

RETURNING MATERIALS......................................................................................................................................... 3.5

SECTION 4 - TECHNICAL CHARACTERISTICS .....................................................................................4.1

ORDERING CODE..................................................................................................................................................... 4.4

APPENDIX A – SERVICE REQUEST FORM TEMPERATURE TRANSMITTER .................................... A.1

APPENDIX B - BATTERY SAFETY DATASHEET ..................................................................................B.1

TT400 WirelessHARTTM – Operation, Maintenance and Instruction Manual

Introduction

VII

INTRODUCTION

WirelessHART technology overview

The WirelessHART technology is based on a wireless mesh network communication protocol used

in process automation applications. It adds wireless capabilities to the HART protocol, while

maintaining compatibility with existing HART devices, commands and already known and used

tools.

WirelessHART network

Basically, a WirelessHART network, defined in the HART specifications, consists of a host, a

WirelessHART Gateway and one or more field devices and/or WirelessHART adapters. Together

they compose a mesh network where the host and devices can communicate.

Host

The host, usually connected to the control network, is a workstation in which, e.g., can be installed

an Human Machine Interface application, which allows an operator to interact with the process.

Through the WirelessHART Gateway, the host can gather data from devices connected to the

WirelessHART network. The host communicates with the WirelessHART Gateway using a

communication protocol, for example, HSE, H1, Profibus or Modbus.

WirelessHART Gateway

It is a "translator" equipment. Thus it converts data from the host to the WirelessHART protocol,

used by the devices connected to the WirelessHART network, and converts data from the devices to

the host. In general, the WirelessHART Gateway incorporates the features of Network Manager and

Access Point. Roughly, the access point can be understood as the WirelessHART radio installed at

the gateway to communicate with devices connected to the wireless network.

Network Manager

The Network Manager is an application that can be embedded in the WirelessHART Gateway. On a

WirelessHART network is only allowed to have one Network Manager. Among its responsibilities,

the Network Manager distributes network identity (advertisement) publishing its existence, manages

and authenticates the addition (joining) of devices to the network. It also distributes individual

security keys (static or rotating) to the devices to ensure secure communication between it and the

devices. The Network Manager assigns communication band to the devices already connected to

TT400 WirelessHARTTM – Operation, Maintenance and Instruction Manual

VIII

the network that requested services to it, as well as manages the routes between the devices on the

mesh network.

Specifically, about the joining process of a WirelessHART device to the network, the Network

Manager validates the Network ID and the Join Key attributes which are configured in the

WirelessHART Gateway and WirelessHART devices.

The Network ID identifies a WirelessHART network in unique way. It is an unsigned integer attribute

and must be configured on the WirelessHART Gateway and all WirelessHART devices. Considering

a WirelessHART network installed in a plant, the permitted values for the Network ID ranges from 0

(hex 0x0000) to 32767 (0x7FFF hexadecimal).

The Join Key is a security key used to encrypt joining requests from WirelessHART devices that

receive the advertisement with the Network Id identical to theirs. It may be single or each

WirelessHART device may be configured with an individual Join Key. In the first case, the

WirelessHART Gateway and all WirelessHART devices must be configured with the same Join Key.

In the second case, which provides higher communication security level, (a) must be configured in

the WirelessHART Gateway a list with individual Join Keys, i.e., a key for each WirelessHART

device, and (b) you must configure each WirelessHART device with its individual Join Key. The Join

Key is a hexadecimal string of 16 bytes. There is no restriction to the hexadecimal value of each

byte. The table below shows examples of some join keys.

JOIN KEYS

16-BYTES HEXADECIMAL STRING

00000000000000000000000000000000

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

00000000000000000000000000000302

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x02

00000000FFFFFFFF0000000000000000

0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

550000000000000000000000000000AA

0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xAA

WirelessHART device

The WirelessHART field device is the device that connects to the process, being able to receive

and/or transmit data on the WirelessHART network. It is a WirelessHART router (repeater) by

nature, i.e., it is able to retransmit messages to/from other devices on the WirelessHART network.

WirelessHART Adapter

It is a bridge-type device, because it is able to provide data of HART + 4 to 20mA field device,

legacy, to the host via WirelessHART. The adapter uses HART FSK standard communication,

wired, to access data from HART field devices. And the adapter also uses the WirelessHART

communication to provide data of the field device to the host. The adapter thus enables a HART

field device to work on WirelessHART network.

We recommend a visit to the HART Communication Foundation website for additional information

about the WirelessHART protocol such as WirelessHART project planning, positioning of devices,

commissioning and verification tools, and practices.

Planning an WirelessHART network

The planning of a WirelessHART network is a task that is very similar to the activities that currently

we perform with conventional wired devices. Furthermore, due to the simplicity of a mesh

WirelessHART network, is exempt, in general, detailed field surveys, which are usually needed

when we plan networks based on other wireless technologies.

Basically, a WirelessHART network involves planning, design, installation and commissioning

phases.

Planning

This phase requires the execution of the steps below:

Scope definition

Clearly define the scope of the network. Answer the question: why do we need the wireless

network? To monitor process variables or to implement a non-critical control? The answer to this

question will facilitate the understanding between the team members responsible for the network

Introduction

and determine one or more process units in the plant. For each process unit, allocate a gateway

with unique and specific Network ID. Outline the main field devices.

Identify potential sources of interference

Are there radio communications or other wireless networks in the plant? What protocols and

frequencies do they use? Use high power? Although unlikely, given the robustness of the radios

used by the WirelessHART technology, prior knowledge of the answers to these questions may

identify potential sources of interference and to indicate the taking of preventive and/or limiting

actions even before installation. For example, you can select a frequency channel as unavailable,

adding it to the black list of frequencies that is under the WirelessHART Network Manager control.

Integration with the host

The gateway connects the WirelessHART field devices to the host system. Plan what devices and

what data are needed. Also, the stations or applications which will process the data have to be

clearly defined. From this set, among the protocols in the system, define which one will be used for

integration with the host and with the existing tools for configuring the devices. After defining the

protocol for integration, the user has to choose the gateway on the market that best meets your

requirements.

Project

In the project phase, it is recommended the adoption of the practices below. Although conservative,

these practices ensure robustness and scalability to the network.

oDefine the Network ID that will be used for all devices in the process unit;

oDefine if the Join Key will be common to all devices or individual and dedicated ;

oDefine the policy to be used for the definition of devices (Long) Tags;

oUse a scale drawing of the process unit;

oPlace the gateway in a strategic position in the process unit ;

oPlan networks with at least five devices;

oInstall at least five devices within the gateway coverage area;

oEnsure that 25 % of the devices are within the gateway coverage area;

oReposition the gateway as needed;

oCheck the coverage area of each device;

oEnsure that each device has three neighbors within its coverage area;

TT400 WirelessHARTTM – Operation, Maintenance and Instruction Manual

oPlace the repeaters as needed.

Installation

As mentioned before, WirelessHART devices should be connected to the process and configured

the same way as conventional wired HART devices.

Handheld terminals can be used normally. Just be sure of having it properly uploaded with the latest

DD files of the devices. However, it is known that the WirelessHART devices have characteristics

inherent to the technology. Because of this, it is recommended the adoption of practices mentioned

below for positioning the gateway and devices.

oInstall the gateway and the devices so that their antennas are vertical;

oEnsure that the antennas are at 0.5 m minimum distance of large obstacles or surfaces;

oEnsure that the antennas of gateway and repeaters are 2 m above most obstacles within their

coverage areas;

oIf there are high devices, does not exceed 45 ° viewing angles between them;

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