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2.12
Auxiliary Functions
The general functions of the device are described in chapter "Auxililary Functions".
Message Processing
2.12.1
After the occurrence of a system fault, data regarding the response of the protective relay and the measured
values are saved for future analysis. For this reason the device is designed to perform message processing.
Applications
•
LED Display and Binary Outputs (Output Relays)
•
Information via Display Field or Personal Computer
•
Information to a Control Center
Prerequisites
The SIPROTEC 4 System Description provides a detailed description of the configuration procedure
(see
/1/ SIPROTEC 4 System
2.12.1.1
LED Displays and Binary Outputs (Output Relays)
Important events and conditions are displayed, using LEDs at the front panel of the relay. The device further-
more has output relays for remote indication. All LEDs and binary outputs indicating specific messages can be
freely configured. The relay is delivered with a default setting. The Appendix of this manual deals in detail with
the delivery status and the allocation options.
The output relays and the LEDs may be operated in a latched or unlatched mode (each may be individually
set).
The latched conditions are protected against loss of the auxiliary voltage. They are reset:
•
On site by pressing the LED key on the relay,
•
Remotely using a binary input configured for that purpose,
•
Using one of the serial interfaces,
•
Automatically at the beginning of a new pickup.
State indication messages should not be latched. Also, they cannot be reset until the criterion to be reported
has reset. This applies to messages from monitoring functions, or similar.
A green LED displays operational readiness of the relay ("RUN"), and cannot be reset. It goes out if the self-
check feature of the microprocessor recognizes an abnormal occurrence, or if the auxiliary voltage is lost.
When auxiliary voltage is present, but the relay has an internal malfunction, then the red LED ("ERROR") lights
up and the processor blocks the relay.
2.12.1.2
Information on the Integrated Display (LCD) or Personal Computer
Events and conditions can be read out on the display at the front cover of the relay. Using the front PC inter-
face or the port B at the botton, a personal computer can be connected, to which the information can be sent.
The relay is equipped with several event buffers, for operational messages, circuit breaker statistics, etc.,
which are protected against loss of the auxiliary voltage by a buffer battery. These messages can be displayed
on the LCD at any time by selection via the keypad or transferred to a personal computer via the serial service
or PC interface. Readout of messages during operation is described in detail in the SIPROTEC 4 System Descrip-
tion.
Classification of Messages
The messages are categorized as follows:
SIPROTEC 4, 7RW80, Manual
C53000-G1140-C233-4, Edition 07.2018
Description).
Functions
2.12 Auxiliary Functions
103
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