Environmental Engineering Reference
In-Depth Information
Human-Machine Interface (HMI):
The in-
terface between operating staff and I&C system
and computer systems linked with plant. The
interface includes displays, controls, and the
operator support system interface.
Individual I&C Systems:
Systems together
performing all I&C functions provided for overall
I&C system, interacting with each other, with
operating personnel and technological systems
and equipment.
Instrumentation and Control System:
A
system, based on electrical and/or programmable
electronic technology, performing I&C functions
as well as service and monitoring functions related
to the operation of the system itself. The term is
used as a general term which encompasses all
elements of the system such as internal power
supplies, sensors and other input devices, data
highways and other communication paths, inter-
faces to actuators and other output devices.
Overall I&C System:
A system providing
monitoring and control of all technological sys-
tems and equipment at NPP or individual NPP
power generating unit.
Software-Hardware Complex (SHC):
Func-
tionally complete item in the form of one or several
independently operated devices with built-in soft-
ware, which are interconnected through electric
and/or optic cables, with peripheral equipment
of the same system and with other I&C systems.
SHC is usually supplied to customer as a set with
necessary service equipment, repair- and recovery
reserve, operating and software documentation.
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