Preface, Introduction, Manual set-up – Rockwell Automation 1794 FLEX I/O System with ControlLogix for SIL2 User Manual
Page 3: Understanding terminology, Preface introduction
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Publication 1794-RM001G-EN-P - December 2011
Preface
Introduction
This application manual is intended to describe the
FLEX I/O with
ControlLogix
Control System components available from Rockwell Automation that are
suitable for use in SIL2 applications. Use this manual in conjunction with
Alternate architecture can be used in SIL2 applications if they are approved by
a certifying agency.
Manual Set-Up
This manual is designed to make clear how the
FLEX I/O with
ControlLogix
Control System can be SIL2-certified. Table Preface.1 lists the information
available in each section.
Understanding Terminology
The following table defines acronyms used in this manual.
Table Preface.1
Section:
Title:
Description:
Introduction to the SIL policy and how that
policy relates to FLEX I/O with a ControlLogix
system.
ControlLogix Communications Description of the ControlLogix communications
modules used in the SIL2-certified FLEX I/O
with ControlLogix system.
Description of the FLEX I/O modules used in the
SIL2-certified FLEX I/O with ControlLogix
system.
Chapter 4
General Requirements for
Application Software
Application software requirements for using
ControlLogix and FLEX modules.
Technical SIL2 Requirements
for the Application Program
Guidelines for application development in
RSLogix 5000 as they relate to SIL2.
Appendix A
Failure rates based on field returns.
Table Preface.2 List of Acronyms Used Throughout the Safety Application Manual
Acronym:
Full Term:
Definition:
CIP
Control and
Information
Protocol
A messaging protocol used by Logix5000™
systems. It is a native communications protocol
used on ControlNet™ communications networks,
among others.
DC
Diagnostic
Coverage
The ratio of the detected failure rate to the total
failure rate.
EN
European Norm.
The official European Standard
GSV
Get System Value A ladder logic output instruction that retrieves
specified controller status information and places
it in a destination tag.