Allen-Bradley GuardPLC 1754 Manual de usuario

Safety Reference Manual

(Catalog Numbers

1753, 1754, and 1755

)

GuardPLC Controller Systems

Allen-Bradley Parts

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines

for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from your local

Rockwell Automation sales office or online at http://literature.rockwellautomation.com) describes some important differences

between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the

wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves

that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the

use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and

requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability

for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or

software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is

prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

Rockwell Automation, Allen-Bradley, TechConnect, GuardPLC, CompactBlock Guard I/O, ArmorBlock Guard I/O, RSNetWorx for DeviceNet, RSLogix Guard PLUS!, and RSLinx are trademarks of Rockwell

Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

WARNING Identifies information about practices or circumstances that can cause an explosion in a

hazardous environment, which may lead to personal injury or death, property damage, or

economic loss.

IMPORTANT Identifies information that is critical for successful application and understanding of the product.

ATTENTION Identifies information about practices or circumstances that can lead to personal injury or death,

property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and

recognize the consequence

SHOCK HAZARD Labels may be on or inside the equipment, for example, a drive or motor, to alert people that

dangerous voltage may be present.

BURN HAZARD Labels may be on or inside the equipment, for example, a drive or motor, to alert people that

surfaces may reach dangerous temperatures.

3Publication 1753-RM002C-EN-P - September 2008 3

Summary of Changes

The information below summarizes the changes to this manual since

the last publication.

To help you find new and updated information in this release of the

manual, we have included change bars as shown to the right of this

paragraph.

We removed all references to 1791DS products, and updated the list of

additional resources on page 11.

Allen-Bradley Parts

4Publication 1753-RM002C-EN-P - September 2008

Summary of Changes

5Publication 1753-RM002C-EN-P - September 2008 5

Table of Contents

Preface

Purpose of This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Additional Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chapter 1

Safety Concept for GuardPLC

Controllers and GuardPLC I/O

Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Introduction to Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Safety Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Safety Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Chapter 2

GuardPLC Central Functions

Chapter Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Power Supply Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Functional Description of the Central Processing Unit. . . . . . 24

Self-test Routines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

GuardPLC Controllers and I/O Modules Error Diagnostics. . . 26

Chapter 3

GuardPLC Controller and

GuardPLC I/O Module Input

Channels

Chapter Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

General Information on GuardPLC Safety Input Modules . . . 29

Safety of Sensors, Encoders, and Transmitters. . . . . . . . . . . . 29

Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Counter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Checklist for Safety Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Chapter 4

GuardPLC Controller and

GuardPLC I/O Output Channels

Chapter Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Overview of GuardPLC Output Modules . . . . . . . . . . . . . . . 42

General Safety Information On GuardPLC Safety Outputs . . . 42

Digital Outputs for Non-relay Output Modules . . . . . . . . . . . 43

Safety-related 2-pole Digital Outputs . . . . . . . . . . . . . . . . . . 45

Relay Outputs in the 1753-OW8 Module . . . . . . . . . . . . . . . 48

Analog Outputs in the 1753-IF8XOF4. . . . . . . . . . . . . . . . . . 49

Analog Outputs in the 1755-OF8 Module . . . . . . . . . . . . . . . 50

Checklist for Safety Outputs . . . . . . . . . . . . . . . . . . . . . . . . 52

Chapter 5

GuardPLC DeviceNet Safety

Scanner

Chapter Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Safety Requirements for DeviceNet Safety Scanner . . . . . . . . 54

User Verification Procedure . . . . . . . . . . . . . . . . . . . . . . . . . 59

Safety Lock with Password Protection . . . . . . . . . . . . . . . . . 60

Error Reaction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Allen-Bradley Parts

6Publication 1753-RM002C-EN-P - September 2008

Table of Contents

Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Reaction Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Connection Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

DeviceNet Scanner Configuration Checklist . . . . . . . . . . . . . 63

Chapter 6

DeviceNet Safety I/O for the

GuardPLC Control System

Chapter Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Typical Safety Functions of DeviceNet Safety I/O Modules . . 68

Safety Considerations for I/O Module Replacement . . . . . . 72

Safety-lock with Password Protection. . . . . . . . . . . . . . . . . . 72

Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Checklist for DeviceNet Safety I/O Modules . . . . . . . . . . . . . 74

Chapter 7

GuardPLC Controller Operating

System

Chapter Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Software for GuardPLC Controllers and I/O Modules . . . . . . 75

Technical Safety for the Operating System . . . . . . . . . . . . . . 77

Operating Mode and Functions of the Operating System. . . . 77

Technical Safety for Programming . . . . . . . . . . . . . . . . . . . . 77

Parameters of the Automation System . . . . . . . . . . . . . . . . . 80

Forcing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Protection Against Manipulation . . . . . . . . . . . . . . . . . . . . . 82

Checklist for the Creation of an Application Program . . . . . . 83

Chapter 8

Technical Safety for the

Application Program

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

General Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Basis of Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Variable Declaration and I/O Naming . . . . . . . . . . . . . . . . . 87

Functions of the Application Program . . . . . . . . . . . . . . . . . 89

Program Documentation for Safety Applications . . . . . . . . . . 95

Considerations for DeviceNet Safety Data. . . . . . . . . . . . . . . 95

Chapter 9

Configuring Communication

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Standard Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Peer-to-peer Safety Communication via GuardPLC Ethernet . 98

High-speed Safety Protocol . . . . . . . . . . . . . . . . . . . . . . . . 102

Reaction Times for DeviceNet Safety Communication . . . . . 103

Publication 1753-RM002C-EN-P - September 2008 7

Table of Contents

Appendix A

Specifications

Chapter Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Climatic Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Mechanical Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

EMC Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Power Supply Conditions . . . . . . . . . . . . . . . . . . . . . . . . . 110

Appendix B

Use in Central Fire Alarm Systems

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Index

Allen-Bradley Parts

8Publication 1753-RM002C-EN-P - September 2008

Table of Contents

9Publication 1753-RM002C-EN-P - September 2008 9

Preface

Read this preface to familiarize yourself with the rest of the manual. It

provides information concerning:

•the purpose of this manual.

•list of abbreviations.

•additional resources.

Purpose of This Manual

This manual explains how the GuardPLC Control System, including

the GuardPLC controllers and distributed I/O, DeviceNet safety

scanner, and DeviceNet safety I/O, can be used in safety applications

up to and including SIL 3 according to IEC 61508, and applications up

to and including Category (CAT) 4, according to EN954-1.

IMPORTANT You must read and understand the safety concepts and

requirements presented in this manual prior to operating a

GuardPLC controller-based safety system.

Allen-Bradley Parts

10 Publication 1753-RM002C-EN-P - September 2008

Preface

List of Abbreviations

The following table defines terms or abbreviations used in this

manual.

Term Definition

1oo2 One Out of Two Safety Architecture. Consists of 2 channels connected

in parallel, such that either channel can process the safety function.

Thus, a dangerous failure would have to occur in both channels before

a safety function failed on demand

2oo3 Two out of Three Safety Architecture. Consists of 3 channels

connected in parallel with a majority voting arrangement for the

output signals, such that the output state is not changed if only 1

channel gives a result that disagrees with the other 2 channels

CRC Cyclic Redundancy Check. A number derived from and stored or

transmitted with a block of data in order to detect corruption

EN European Norm. The official European Standard

EPROM Erasable Programmable Read-only Memory

HSP High-speed Safety Protocol

IEC International Electrotechnical Commission Standard

MAC ID Media Access Identifier. A node’s address on a network or subnet

Non-interacting Does not interfere or affect functions of the safety system

PES Programmable Electronic System

PFD Probability of Failure on Demand

PFH Probability of Failure per Hour

POU Program Organization Unit

PS Programming System

SIL Safety Integrity Level

SNN Safety Network Number

SRS System, Rack, Slot (This number is used as the System ID)

Standard Any object, task, tag, or program, that is not marked as being a safety

item

TÜV Technischer Überwachungs-Verein (Technical Inspection Association)

UNID Unique Node Identifier

WD Watchdog Time

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