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2.3
Message Processing
2.3.1
Description
LED Display and
Binary Outputs
(output relays)
6MD665 Manual
C53000-G1876-C103-3
Message processing in Bay Processing Unit 6MD665 is provided to assure a save
and instantaneous transmission of information to the control centre. This is done by
giving priority to feedback information from commands before measured values and
other messages. Thus the user quickly gets an overview on the current status of the
station even when data exchange is very high.
Message processing comprises the following
• Communication with the Substation Controller Utilizing the Priorization Principle
• Transmission of data to the bay devices connected via inter-relay communication
• Creation of group alarms in accordance with the configuration in CFC
• Display of the event list of the device, memorization of 200 messages
• Display of the signalizing LEDs (in accordance with the configuration carried out)
Important events and conditions are displayed, using LEDs on 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
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.
Condition messages should not be latched. Also, they cannot be reset until the crite-
rion 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.
Further information on the functionality, allocation of indications, on how to read out
®
information via DIGSI
®
SIPROTEC
system description /1/.
and the operator panel of the device etc. can be found in the
2.3 Message Processing
29
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