Arteche smART P500, Instruction Manual

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3BTELECONTROL FUNCTIONS
PROTECTION, CONTROL AND METERING FUNCTIONS
Figure 2-56 States to be sent/received
Each of these 16 signals has a configurable “secure state”. When there is no
communication with another relay the stimulus can be configured to reach one of
three conditions.

‘1’ or active.

‘0’ or inactive.

The state it had before the communication was lost.
This configuration should be used so that the logic or anything connected to the input
signal reaches a secure position if the communication is lost.
A loss of communication is declared when no correct messages have been received
in three consecutive occasions. There is a signal that indicates that the smart P2P
has achieved such condition. A counter, associated to every signal, can have values
between 1 and 8. The goal of such counter is to confirm or validate the reception of a
state change. When one of the input signals receives a change respective to the
previous state of the same signal the counter is decreased by one; when the count
reaches zero the state is considered as validated or confirmed.
The result of the signal visible at the proART does not change until the associated
counter reaches zero. If the state received by the protocol changes again, the counter