Message Processing; Led Display And Binary Outputs (Output Relays) - Siemens siprotec SJ62 User Manual

2 Functions

2.23.2 Message Processing

Applications
Prerequisites

2.23.2.1 LED Display and Binary Outputs (output relays)

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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.
• LED Display and Binary Outputs (Output Relays)
• Information via Display Field or Personal Computer
• Information to a Control Center
The SIPROTEC 4 System Description gives a detailed description of the configuration
procedure (see /1/).
Important events and conditions are displayed, using LEDs at the front panel of the
relay. The device furthermore has output relays for remote indication. All LEDs and
binary outputs indicating specific messages can be freely configured. The relay is de-
livered with a default setting. The Appendix of this manual deals in detail with the de-
livery 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 oc-
currence, 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.
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015