Rockwell Automation AADvance Controller Safety Manual - Manual (Page 121)

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Document: 553630
ICSTT-RM446K-EN-P Issue: 10
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6-5
Chapter 5 Glossary of Terms
I
I/O base unit
A backplane assembly which holds up to
three I/O modules and their associated
termination assembly or assemblies in an
AADvance controller. Part number 9300.
See 'I/O module' and 'termination assembly'.
I/O module
A collation of interfaces for field sensors
(inputs) or final elements (outputs),
arranged in a self-contained and
standardized physical form factor.
IEC 61000
A series of international standards giving
test and measurement techniques for
electromagnetic compatibility.
IEC 61131
An international standard defining
programming languages, electrical
parameters and environmental conditions
for programmable logic controllers. Part 3,
which is entitled 'Programming Languages',
defines several limited variability languages.
IEC 61508
An international standard for functional
safety, encompassing electrical, electronic
and programmable electronic systems;
hardware and software aspects.
IEC 61511
An international standard for functional
safety and safety instrumented systems (SIS)
for the process industry, encompassing
electrical, electronic and programmable
electronic systems, hardware and software
aspects.
indicator
A device which can change its state to give
information.
input (Workbench variable)
In the context of an AADvance Workbench
variable, this term describes a quantity
passed to the Workbench from a controller.
instruction list
An IEC 61131 language, similar to the simple
textual language of PLCs. See 'limited
variability language'.
integer
A variable type defined by the IEC 61131
standard.
IXL
IXL stands for ISaGRAF eXchange
Layer.This is the communication protocol
between ISaGRAF based components.
K
key connector
The receptacle on the AADvance controller
for the program enable key. A 9-way 'D'
type socket, located on the 9100 processor
base unit.
L
ladder diagram
An IEC 61131 language composed of
contact symbols representing logical
equations and simple actions. The main
function is to control outputs based on
input conditions. See 'limited variability
language'.
LAN
Local area network. A computer network
covering a small physical area, characterised
by a limited geographic range and lack of a
need for leased telecommunication lines.
live insertion
The removal and then reinsertion of an
electronic module into a system while the
system remains powered. The assumption is
that removal of the module and reinsertion
will cause no electrical harm to the system.
Also referred to as 'hot swap'.
low demand mode
Where the Safety Instrumented Function
only performs its designed function on
demand, and the frequency of demands is no
greater than one per year.