Chapter 9. Local Interface: Graphic Display
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
9-10
9.4
Control Function Operations
The Control Functions are performed chiefly through the Graphic Display with the help of the 5
control keys described above. It is indispensable that the indication
[CON]
be visible in the
upper right corner of the Alphanumeric Display for the control keys to be operational.
Action on the elements of the position is subordinated to the analysis made by the Logic and
determined by the Configuration, which decides whether this action is feasible or not, as
indicated in Chapter 7, Description of Operation of the Control Subsystem. The functions
associated with Control have been designed so that they can be adapted to the various possible
Configurations of the positions.
9.4.1
General Procedure for Command Execution
The execution of an order always follows the same steps independently of the type of device
that it acts upon. This coherence aims to facilitate operation for the personnel responsible for
operating the unit.
Each time the selection key,
NXT
, is pressed, each of the devices that exist in the position upon
which an order can be executed gets highlighted one after the other cyclically. This highlighting
consists in the image corresponding to the device blinking with a cadence of 1 second. If no
order is received during the ten seconds following the selection of the element, the module
automatically aborts the selection and returns to the default state corresponding to no element
being selected. The part of the image that blinks during the selection is the whole icon minus
the associated texts.
The predetermined order of selection is always the same, but varies from unit to unit and
according to its Configuration. For a specific position, an example could be the following
succession:
LOCAL/REMOTE CONTROL State.
State of panel CONNECTED/DISCONNECTED.
Busbar Selector Disconnectors.
Breaker.
Associated devices (Reset Unit, Automatism, etc.).
Disconnectors of grounding on Busbar Side.
Disconnectors of grounding on Line Side.
By-pass Disconnectors and ultimately nothing.
After selecting the element to be controlled, press the key corresponding to the
order
(key to
close
I
or key to open
O
). Should the order not be executable for any cause, display will present
two lines of text indicating that execution is impossible and the reasons for which it cannot be
executed:
LINE 1:
ORDER NOT EXECUTABLE
LINE 2:
DISCHARGE
INTERLOCKING
POSITION IN REMOTE CONTROL
