Control And Indication Of Disturbance Recorder Status; Triggering - ABB REU 610 Technical Reference Manual

1MRS755769
5.1.11.3.
5.1.11.4.
Voltage Relay
Technical Reference Manual
Cycles
[ ]
s =
Nominal frequency [Hz]
Changing the setting values of parameters M15, V238 and V243 is allowed only
when the recorder is not triggered.
The post-triggering recording length defines the time during which the recorder
continues to store data after it has been triggered. The length can be changed with
SPA parameter V240. If the post-triggering recording length is defined to be the
same as the total recording length, no data stored prior to the triggering is retained in
the memory. By the time the post-triggering recording finishes, a complete
recording is created.
Triggering of the recorder immediately after it has been cleared or the auxiliary
voltage connected may result in a shortened total recording length. Disconnection of
the auxiliary voltage after the recorder has been triggered, but before the recording
has finished, on the other hand, may result in a shortened post-triggering recording
length. This, however, does not affect the total recording length.
At a power reset, triggered recorder data is retained in the memory provided that it
has been defined non-volatile.

Control and indication of disturbance recorder status

It is possible to control and monitor the recording status of the disturbance recorder
by writing to and reading SPA parameters M1, M2 and V246. Reading SPA
parameter V246 returns either the value 0 or 1, indicating whether the recorder has
not been triggered or triggered and ready to be uploaded. Event code E31 is
generated the moment the disturbance recorder is triggered. If the recorder is ready
to be uploaded, this is also indicated by an asterisk shown in the lower right-hand
corner of the LCD when it is in the idle mode. Indication can also be routed to
programmable LEDs.
Writing the value 1 to SPA parameter M2 clears the recorder memory and enables
the triggering of the recorder. Recorder data can be cleared by performing a master
reset, that is, clearing indications and memorized values and unlatching output
contacts.
Writing the value 2 to SPA parameter V246 restarts the unloading process by setting
the time stamp and the first data ready to be read.

Triggering

The user can select one or several internal or external digital input signals to trigger
the disturbance recorder, either on the rising or falling edge of the signal(s).
Triggering on the rising edge means that the post-triggering recording sequence
starts when the signal is activated. Correspondingly, triggering on the falling edge
means that the post-triggering recording sequence starts when the active signal is
reset.
REU 610
(6)
53