Rockwell Automation AADvance Controller Solutions Handbook - Manual (Page 140)

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11-4 Document: 553631
(ICSTT-RM447J_EN_P) Issue: 09:
Solutions Handbook (AADvance Controller)
fault reset button
The momentary action push switch located
on the front panel of the 9110 processor
module.
fault tolerance
Built-in capability of a system to provide
continued correct execution of its assigned
function in the presence of a limited number
of hardware and software faults.
fault tolerant
The capability to accept the effect of a single
arbitrary fault and continue correct
operation.
fault warning receiving station
A centre from which the necessary
corrective measures can be initiated.
fault warning routing equipment
Intermediate equipment which routes a fault
warning signal from the control and
indicating equipment to a fault warning
receiving station.
field device
Item of equipment connected to the field
side of the I/O terminals. Such equipment
includes field wiring, sensors, final control
elements and those operator interface
devices hard-wired to I/O terminals.
fire alarm device
A component of a fire alarm system, not
incorporated in the control and indicating
equipment which is used to give a warning
of fire — for example a sounder or visual
indicator.
fire alarm receiving station
A centre from which the necessary fire
protection or fire fighting measures can be
initiated at any time.
fire alarm routing equipment
Intermediate equipment which routes an
alarm signal from control and indicating
equipment to a fire alarm receiving station.
function block diagram
An IEC 61131 language that describes a
function between input variables and output
variables. Input and output variables are
connected to blocks by connection lines.
See 'limited variability language'.
functional safety
The ability of a system to carry out the
actions necessary to achieve or to maintain
a safe state for the process and its
associated equipment.
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'.