Rockwell Automation AADvance Controller Troubleshooting and Maintenance Manual - Manual (Page 89)

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Document: 553634
(ICSTT-RM406F_EN_P) Issue: 089:
8-5
Chapter 7 Glossary of Terms
G
group
A collection of two or three input modules
(or two output modules), arranged together
to provide enhanced availability for their
respective input or output channels.
H
hand-held equipment
Equipment which is intended to be held in
one hand while being operated with the
other hand.
HART
HART (Highway Addressable Remote
Transducer) is an open protocol for process
control instrumentation. It combines digital
signals with analogue signals to provide field
device control and status information. The
HART protocol also provides diagnostic
data. (For more details of HART devices
refer to the HART Application Guide,
created by the HART Communication
Foundation, and their detailed HART
specifications. You can download documents
from www.hartcomm.org.)
high demand mode
Where the frequency of demands for
operation made on a safety-related system is
greater than once per year or greater than
twice the proof test interval. Applies to
safety-related systems that implement
continuous control to maintain functional
safety. Sometimes known as 'continuous
mode'.
hot swap
See live insertion.
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'.