Rockwell Automation AADvance Controller Troubleshooting and Maintenance Manual - Manual (Page 88)

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8-4 Document: 553634
(ICSTT-RM406F_EN_P) Issue: 089:
Troubleshooting and Maintenance Manual (AADvance
Controller)
EUC
Equipment Under Control. The machinery,
apparatus or plant used for manufacturing,
process, transportation, medical or other
activities.
expansion cable assembly
A flexible interconnection carrying bus
signals and power supplies between
AADvance base units, available in a variety
of lengths. Used in conjunction with a cable
socket assembly (at the left hand side of a
base unit) and a cable plug assembly (at the
right hand side of a base unit).
F
fail operational state
A state in which the fault has been masked.
See 'fault tolerant'.
fail safe
The capability to go to a pre-determined
safe state in the event of a specific
malfunction.
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.