Output Matrix Test; Data Storage; General; Event Records - Siemens 7SR224 Description & Operation

(1) Description of Operation 7SR224
6.3 O M
UTPUT ATRIX
The feature is only visible from the Relay fascia and allows the user to operate the relays functions.
The test of the function will automatically operate any Binary Inputs or LED's already assigned to that
function.
Any protection function which is enabled in the setting menu will appear in the Output Matrix Test.
6.4 D S
ATA TORAGE
6.4.1

General

The relay stores three types of data: relay event records, analogue/digital waveform records and fault
records. Data records are backed up in non-volatile memory and are permanently stored even in the
event of loss of auxiliary d.c. supply voltage.
6.4.2

Event Records

The event recorder feature allows the time tagging of any change of state (Event) in the relay. As an
event occurs, the actual event condition is logged as a record along with a time and date stamp to a
resolution of 1 millisecond. There is capacity for a maximum of 5000 event records that can be stored
in the relay and when the event buffer is full any new record will over-write the oldest. Stored events
can be erased from the front fascia via DATA STORAGE>Clear Events setting or using Reydisp
Evolution via Relay > Events > Reset Events.
The following events are logged:
Change of state of Binary outputs.
Change of state of Binary inputs.
Change of Settings and Settings Group
Change of state of any of the control functions of the relay.
All events can be retrieved over the data communications channel(s) and can be displayed in the
'Reydisp Evolution' package in chronological order, allowing the sequence of events to be viewed.
Events are also made available spontaneously to an IEC 60870-5-103, Modbus RTU or DPN 3.0
compliant control system.
For a complete listing of events available in each model, refer to Technical Manual section 4 'Data
Comms'.
6.4.3

Waveform Records.

Relay waveform storage can be triggered either after user selected relay operations, from the relay
fascia, from a suitably programmed binary input or via the data comms channel(s). The stored
analogue and digital waveforms illustrate the system and relay conditions at the time of trigger.
In total the relay provides 10 seconds of waveform storage, this is user selectable to 1 record of 10
seconds duration, 2 records of 5 seconds duration, 5 records of 2 seconds duration or 10 records of 1
second duration. When the waveform recorder buffer is full any new waveform records will over-write
the oldest. The most recent record is Waveform 1.
As well as defining the stored waveform record duration the user can select the percentage of the
waveform storage prior to triggering.
The waveform recorder samples at a rate of 32 samples per cycle (1600Hz).
Stored waveforms can be erased using the DATA STORAGE>Clear Waveforms setting or using
Reydisp Evolution via Relay > Waveform > Reset Waveform Records.
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