ZIV 7IRD-A - Elements of the Control Subsystem

Chapter 7. Description of Operation of the Control Subsystem
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
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7.2.1 Elements of the Control Subsystem
 Logic
The Logic can be considered the processor encompassing a series of blocks, each of which
performs a given function according to logic gates using input signals to the Control Subsystem
and outcome signals from previously processed blocks. Each of the blocks generates one or
more Logic Outputs that will be associated, depending on the Configuration, to one or another
Control Subsystem Output.
 Counter
The Counters are elements of the Logic with the mission of counting actions of certain Physical
Inputs. The accumulated value is presented on the measurement screen in the Graphic Display
and sent by means of the Communications Protocol towards the Central Unit. It is commonly
used to accumulate pulses from the power meters installed in the Substation.
 Logic Configuration
Logic Configuration is taken to refer to the program loaded in the terminal through the Local or
Remote Communications Port that determines how certain functions are to be performed:
- The association between the Inputs to the Control Subsystem and the Logic Inputs (Input
signals to the Logic).
- The association between the Outputs from the Control Subsystem and the Logic Outputs
(Output signals from the Logic).
- The association between the Logic Outputs and the corresponding PROCOME / DNP3
indices to send these signals through Communications.
- The association between the signals that arrive through Communications with their
corresponding PROCOME / DNP3 tag and the Logic Inputs related to these signals.
- The association between the Logic Outputs and the corresponding Output signals
through Communications related to a certain PROCOME / DNP3 index.
- The use of a certain set of logic blocks whose Inputs and Outputs are also determined by
the Configuration.
- The use of Input Signals to the Alarm panel, Physical Input Signals, Protection Inputs or
Logic Outputs.
- The use of Input Signals to the Single-Line Objects, Physical Input Signals or Logic
Outputs.
- The use of one or another Single-Line Diagram depending on the model and on the tags
associated with each of the Single-Line Objects.
 Communication
It is the function associated with the Control Subsystem whereby the terminal settings are
loaded, orders are sent to the Control Subsystem to be processed by the Logic, the Logic
settings are loaded and the outcome signals from the Logic required by the Central Unit are
sent to it.
 Alarm Panel
The Alarm Panel is an alarm processor that, depending on the signals that arrive to it from
Protection, Physical Inputs and Logic Outputs, will determine whether or not to present an alarm
message in the Graphic Display and, if so, which is the corresponding associated message.