ZIV 7IRD-A, Инструкция по эксплуатации

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Chapter 7. Description of Operation of the Control Subsystem
7-3
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
7.2 Control Unit
The Control Unit can be represented by the block diagram of Figure 7.1. The Control and
Protection Subsystems are separated by a double line, indicating that, although both
subsystems are related to each other, they perform independent functions and the only
connection is the exchange of signals between the two. In this diagram, bear in mind the
following points (referring to the Control Subsystem, central part of the figure):

All blocks with a fine-line border represent a set of signals of a single type.

Blocks with thick-line borders represent elements that are part of the Control Subsystem.
These elements receive and/or send signals to the exterior or to other elements that can
belong to the Control or Protection Subsystems. If, in addition, they have rounded
corners, they represent elements associated with the Control Subsystem and the signals
from the exterior are received through them.

Shaded blocks are elements of the Control Subsystem, but their operation can be
configured from the exterior.
The Control process can be described as an additional, independent module of the Protection
Subsystem, as already mentioned. It receives signals through various routes, processes them
and, depending on the Input Signals and on the outcome of the process, generates Output
Signals that are subsequently used for information, actions, alarms, etc. The signals that
function as Inputs to the Control Subsystem are treated according to a Logic the Configuration
of which is loaded as a file through the front Remote Communication Port. This Configuration
includes a series of settings related to the Logic and that can be modified by means of the
keypad associated with the display.

Processing the Signals
The Control Subsystem basically takes Input Signals from various sources, both external to the
unit (Communications or HMI) and internal, processes these signals according to the
Configuration that has been loaded and the pre-established settings and, depending on all of
this, activates certain Output Signals that will be used for sending informative messages or
measurements to the Central Unit, Orders to relays, LEDs and Protection. In addition, the State
of the elements of the controlled position, the Alarms registered the measurements, the
Counters, the State of the Protection Inputs, Outputs and LEDs can be viewed in the Graphic
Display.
The
Logic and the Configuration take on special importance in the processing of the signals
within the Control Subsystem. It can be said that the Logic has a set of blocks that encompass a
series of Logic Operations. Each of these blocks determines an outcome (state of one or more
signals) depending on the state of the Inputs of that block. The use of one or another block is
determined by the
Configuration .