Sequential Of Events - ABB RET670 Applications Manual

Section 3
IED application
3.15.7
3.15.7.1
3.15.7.2
3.15.8
3.15.8.1
798

Sequential of events

Application
From an overview perspective, continuous event-logging is a useful system monitoring
instrument and is a complement to specific disturbance recorder functions.
The event list (EL), always included in the IED, logs all selected binary input signals
connected to the Disturbance report function. The list may contain of up to 1000 time-
tagged events stored in a ring-buffer where, if the buffer is full, the oldest event is
overwritten when a new event is logged.
The difference between the event list (EL) and the event recorder (ER) function is that
the list function continuously updates the log with time tagged events while the
recorder function is an extract of events during the disturbance report time window.
The event list information is available in the IED via the local HMI or PCM600.
Setting guidelines
The setting parameters for the Event list function (EL) are a part of the Disturbance
report settings.
It is possible to event handle up to 96 binary signals, either internal signals or signals
from binary input channels. These signals are identical with the binary signals recorded
by the disturbance recorder.
There is no dedicated setting for the EL function.
Indications
Application
Fast, condensed and reliable information about disturbances in the primary and/or in
the secondary system is important. Binary signals that have changed status during a
disturbance are an example of this. This information is used primarily in the short term
(for example, immediate disturbance analysis, corrective actions) to get information via
the local HMI in a straightforward way without any knowledge of how to handle the IED.
There are three LEDs on the local HMI (green, yellow and red), which will display
status information about the IED (in service, internal failure, and so on) and the
Disturbance report function (trigged).
The Indication function (IND), always included in the IED, shows all selected binary
input signals connected to the Disturbance Report function that have been activated
1MRK504116-UUS C
Application manual