158 Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019
Glossary
high demand mode Where the Safety Instrumented Function in the safety system only performs its
designed task on a demand, and the frequency of demands is more than one
time each year.
hot swap See ‘live insertion’.
I
I/O base unit A backplane assembly holding one, two, or three I/O modules and their related
termination assembly or assemblies in an AADvance controller. Part number
9300. See 'I/O module' and 'termination assembly'.
I/O module An AADvance module continuing interfaces for inputs from field sensors and
generating output for field elements. Connects to the field through
Termination Assemblies and to the processor across I/O bus connections.
IEC 61000 A series of international standards providing techniques for testing and
measuring 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 more than one
limited variability language.
IEC 61499 An international standard defining an open architecture for distributed control
and automation.
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 for the process industry, encompassing electrical, electronic and
programmable electronic systems, hardware and software aspects.
indicator A device whose state can change to provide data.
input
(AADvance Workbench variable)
In the context of an AADvance Workbench variable, a quantity passed to the
Workb en c h f r o m a c ontrol l er.
instruction list An IEC 61131 language, almost the same as the simple textual language of
PLCs. See 'limited variability language'.
integer A variable type specified by the IEC 61131 standard.
IXL ISaGRAF eXchange Layer. The protocol for communications between
ISaGRAF-based components.
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