
Reference: A938
Index: B
Page 28
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Instruction Manual – NPS914 Alarm and Indication IED
the status changes from 0 to 1 and from 1 to 0 only by user input. The mode of each input can be changed
to "Pulse" in which logical inputs status changes from 0 to 1 by user input and then immediately back to 0.
Logical output signals can be used as the end result of logic that has been built in the SMART9 setting tool.
The end result can then be connected to a digital output or a LED in the matrix, block functions and much
more.
GOOSE inputs are mainly used for controlling purposes through the IEC 61850. There are 64 GOOSE inputs
signal status bits, and their status can be either 0 or 1. "GOOSE IN quality" checks the quality of a GOOSE
input message. There are 64 GOOSE input quality signals, and their status can be either 0 ("Good" or "Valid")
or 1 ("Bad" or "Invalid").
Logical outputs can be used when building a programmable logic. Activating a logic gate does not create an
event but when a logical output is connected to a logic gate it is possible to create an event of the gate's
activation. Logical inputs and outputs have ON and OFF events that can be masked on (they are masked
off by default).
NOTE!
Please refer to the "System integration" chapter for a more detailed description of the use of logical
signals.