Control And Target Of Disturbance Recorder Status - ABB REU 610 Technical Reference Manual

REU 610
5.1.11.3.
5.1.11.4.
54
Voltage Relay
Technical Reference Manual - ANSI Version
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 target 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.
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 targets 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.
The trigger signal(s) and the edge are selected with SPA parameters V236...
V237 and V241...V242; see Table 5.1.17.-5 and Table 5.1.17.-6. The
recorder can also be triggered manually with SPA parameter M1.
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