Rockwell Automation AADvance Controller Configuration Guide User Manual
Page 280
12-6
Document: 553633
ICSTT-RM405f-EN-P
Issue 07
Configuration Guide (AADvance Controller)
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 frequency of demands for
operation made on a safety-related system is
no greater than one per year and no greater
than twice the proof-test frequency.
M
manual call point
A component of a fire detection and fire
alarm system which is used for the manual
initiation of 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
associated slave links, within the AADvance
Workbench. The settings include
communication settings and messages.
module locking 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 lock to the processor
base unit or I/O base unit.
N
NFPA 85
The Boiler and Combustion Systems
Hazards Code. Applies to certain boilers,
stokers, fuel systems, and steam generators.
The purpose of this code is to contribute to
operating safety and to prevent uncontrolled
fires, explosions and implosions.
NFPA 86
A standard for Ovens and Furnaces.
Provides the requirements for the
prevention of fire and explosion hazards in
associated with heat processing of materials
in ovens, furnaces and related equipment.
O
on-line
The state of a controller that is executing
the application software.
OPC
A series of standards specifications which
support open connectivity in industrial
automation.
output (Workbench variable)
In the context of an AADvance Workbench
variable, this term describes a quantity
passed from the Workbench to a controller.
P
peer to peer
A Peer to Peer network consists of one or
more Ethernet networks connecting
together a series of AAdvance and/or
Trusted controllers to enable application
data to be passed between them.