Understanding terminology – Rockwell Automation 1768-L45S Compact GuardLogix Controllers User Manual
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Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Preface
You can view or download publications at
. To order paper copies of
technical documentation, contact your local Allen-Bradley® distributor or
Rockwell Automation sales representative.
Understanding Terminology
This table defines terms used in this manual.
Logix5000 Controllers Execution Time and Memory Use Reference
Manual, publication
Provides information on estimating the execution time and memory use for instructions
Logix5000 Controllers Import Export Reference Manual, publication
Provides information on using RSLogix
™
5000 Import/Export utility
PhaseManager User Manual, publicat
Provides information on programming the controller to use equipment phases in a standard application
SERCOS and Analog Motion Configuration and Startup Manual,
publication
Provides information on configuring the controller for motion axes, coordinate system, and motion modules in
standard applications
Industrial Automation Wiring and Grounding Guidelines, publication
Provides in-depth information on grounding and wiring programmable controllers
Resource
Description
Table 1 - Terms and Definitions
Abbreviation
Full Term
Definition
1oo2
One Out of Two
Refers to the behavioral design of a multi-processor safety system.
CIP
Common Industrial Protocol
A communication protocol designed for industrial automation applications.
CIP Safety
Common Industrial Protocol – Safety Certified
SIL 3/PLe rated version of CIP.
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
An instruction that retrieves specified controller-status information and places it in a destination tag.
—
Multicast
The transmission of information from one sender to multiple receivers.
PFD
Probability of Failure on Demand
The average probability of a system to fail to perform its design function on demand.
PFH
Probability of Failure per Hour
The probability of a system to have a dangerous failure occur per hour.
PL
Performance Level
ISO 13849-1 safety rating.
RPI
Requested Packet Interval
The expected rate in time for production of data when communicating over a network.
SNN
Safety Network Number
A unique number that identifies a section of a safety network.
SSV
Set System Value
An instruction that sets controller system data.
—
Standard
An object, task, tag, program, or component in your project that is not a safety-related item.
—
Unicast
The transmission of information from one sender to one receiver.