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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The Input Signals to the blocks must be certain ones depending on the operation chosen to
obtain a given output. The Input Connection Process is the software process that connects
the Inputs of the blocks with that of appropriate Inputs to the Control Subsystem according to
the Configuration.
Likewise, the Output Signals from the blocks are associated with Output Signals from the
Control Subsystem. This is done in the Output Connecting Process according to the
Configuration.
If the required Input Signals to the Control Subsystem are signals that arrive through
Communications, they are coded according to PROCOME or DNP3 Communications Protocol,
which requires each PROCOME / DNP3 index (coded signal) to be associated with its
corresponding signal. This process is performed in Input Tagging and the associations are
made in one form or another according to the Configuration. The same happens with the
signals that are sent from the Control Subsystem through Communications. The software
process is carried out in Output Tagging and is also determined by the Configuration.
Interconnection between Protection and Control
The Control and Protection Subsystems are interconnected by sending signals from Protection
to Control and vice versa. The signals that Protection sends to Control are Alternating Current
Measurements (whenever there is no measuring board), Protection Auxiliary Contact Outputs
and the State of the Protection LEDs.
Signals from Protection to Control are exchanged as indicated in Chapter 6, through a
Communications Interface that picks up the fourteen Protection Auxiliary Contact Outputs and
the twelve Additional ones related to the Visual Signals. This same Interface manages the joint
use of the Alphanumeric Display by the two subsystems as described in Chapter 8
Alphanumeric Keyboard and Display.
Inputs / Outputs from the Control Subsystem
The Input as well as the Output Signals depends on the configuration loaded in the unit. The
number of these Physical Signals depends on the specific model.
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