Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019 157
Glossary
fault tolerant The ability of a system to accept the effect of one arbitrary fault and continue
correct operation.
fault warning receiving station A location where corrective measures can be initiated.
fault warning routing equipment Equipment which routes a fault warning signal from control and indicating
equipment to a fault warning receiving station.
field device An item of equipment connected to the field side of the I/O terminals. Such
equipment includes field wiring, sensors, final control elements and operator
interface devices which are 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 location from which fire protection or firefighting measures can be initiated.
fire alarm routing equipment Equipment which routes an alarm signal from control and indicating
equipment to a fire alarm receiving station.
function block diagram An IEC 61131 language describing 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 perform the actions necessary to achieve or to
maintain a safe state for a procedure and its related equipment.
G
group A collection of two or three input modules (or two output modules), arranged
together to supply enhanced availability for their 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. See ‘portable equipment’.
HART Highway Addressable Remote Transducer. An open protocol for process
control instrumentation. It combines digital signals with analogue signals to
give control and status data for field devices. For more details about HART
devices refer to the HART Application Guide, created by the HART
Communication Foundation, and the full HART specifications. You can
download documents from www.hartcomm.org.
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