Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019 159
Glossary
K
key connector The receptacle on the AADvance controller for the program enable key. A 9-
way 'D' type socket on the 9100 processor base unit.
L
ladder diagram An IEC 61131 language composed of contact symbols representing logical
equations and 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,
characterized by a small geographic range having no 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 known as 'hot
swap'.
low demand mode Where the Safety Instrumented Function only performs its designed task on
demand, and the frequency of demands is no more than one time each year.
M
manual call point A component of a fire detection and fire alarm system enabling a person to
trigger an alarm.
MODBUS An industry standard communications protocol developed by Modicon. Used
to communicate with external devices such as distributed control systems or
operator interfaces.
MODBUS object A representation of the configuration settings for a MODBUS Master or for its
related slave links, in the AADvance Workbench. The settings include
communication settings and messages.
module clamp screw The AADvance latch mechanism seen on the front panel of each module and
operated by a broad, flat-blade screwdriver. Uses a cam action to hold the
module to its base unit.
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