Operation Principle - ABB Relion 650 Series Communication Protocol Manual

1MRK 511 379-UEN A
7.1.5

Operation principle

The main purpose of the Event function (EVENT) is to generate events when the state or value
of any of the connected input signals is in a state, or is undergoing a state transition, for which
event generation is enabled.
Each EVENT function has 16 inputs INPUT1 - INPUT16. Each input can be given a name from the
Application Configuration tool. The inputs are normally used to create single events, but are
also intended for double indication events.
The EVENT function also has an input BLOCK to block the generation of events.
Events that are sent from the IED can originate from both internal logical signals and binary
input channels. The internal signals are time-tagged in the main processing module, while the
binary input channels are time-tagged directly on the input module. Time-tagging of the
events that are originated from internal logical signals have a resolution corresponding to the
execution cycle-time of the source application. Time-tagging of the events that are originated
from binary input signals have a resolution of 1 ms.
The outputs from the EVENT function are formed by the reading of status, events and alarms
by the station level on every single input. The user-defined name for each input is intended to
be used by the station level.
All events according to the event mask are stored in a buffer, which contains up to 1000
events. If new events appear before the oldest event in the buffer is read, the oldest event is
overwritten and an overflow alarm appears.
Events are produced according to set event masks. The event masks are treated commonly for
both the LON and SPA communication. An
channel. These settings are available:
NoEvents
•
OnSet
•
• OnReset
OnChange
•
AutoDetect
•
It is possible to define which part of the EVENT function generates the events. This can be
performed individually for communication types
each communication type these settings are available:
Off
•
Channel 1-8
•
Channel 9-16
•
Channel 1-16
•
For LON communication, events are normally sent to station level at change. It is also possible
to set a time for cyclic sending of the events individually for each input channel.
To protect the SA system from signals with a high change rate that can easily saturate the
EVENT function or the communication subsystems behind it, a quota limiter is implemented. If
an input creates events at a rate that completely consume the granted quota then further
events from the channel will be blocked. This block will be removed when the input calms down
and the accumulated quota reach 66% of the maximum burst quota. The maximum burst
quota per input channel is 45 events per second.
Communication protocol manual
EventMask can be set individually for each input
SPAChannelMask and LONChannelMask . For
Section 7
SPA functions
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