Rockwell Automation Publication ICSTT-RM446N-EN-P - April 2018
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Glossary
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.
