Sices D-PRO, Technical Manual

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D-PRO Protection relay Technical Manual 9
4.3
The controller is already equipped with 8 digital inputs that activate by connecting them to
GND. When it is left floating, the input brings itself to +Vbatt. Avoid situations where
intermediate or undefined voltage levels can occur.
In addition to the 8 physical digital inputs, the controller also manages 16 virtual digital inputs.
They are managed by the controller exactly as they were physical inputs (without limitations).
The virtual inputs status is not acquired by the hardware, but it is determined by software. In
fact, every digital input can be associated to an AND/OR logic that determines its status (see
par. 4.4.2).
4.3.1
By default, all digital inputs are “active” only when the related terminal is connected to the
negative of the supply voltage of the controller; they are considered “not active” when the
related terminal is not connected to anything.
The logic status of the input can be inverted
with respect of the physical status by selecting the box “Reverse polarity” in the input
configuration page on BoardPrg3.
The box is only visible if the function selected is other
than DIF.0000
– “Not used”.
It is also possible to invert the logic status (always individually for each input), by operating
directly on the controller by using the parameters P.2000 (for the input 1..8 present on the
controller).
Said parameters have a bit for each output:
•
A bit set to zero means that the related input is “active” when it is connected to the
negative supply of the controller.
•
A bit set to one means that the related
input is considered “active” when the terminal
is not connected to anything (it will become “not active” when the terminal is connected
to the supply negative of the controller).
By default, all bits are set to zero.
Each input (both physical and virtual) has three parameters associated:
•
One parameter that configures its function (P.2001 for input 1).
•
One parameter that configures the delay time (P.2002 for the input 1).
•
One parameter that configures a message to show on the display (P.2003 for the input
1).
See documents [1] for the parameters list.
The management of the physical and virtual inputs is the same.
The parameters that configure the delay and the message for an input are used by the
controller only for certain features of the inputs. The following table highlights when they are
used.
NOTE: in BoardPrg3, the boxes for the delay and for the message are always showed,
even if they are not used by the controller.
The identification of the inputs functions that start with 3xxx concern operating statuses, while
the ones that start 4xxx activate alarms (warning or alarms).