Operation Modes; Exclusion Mode - ABB Relion SMU615 Technical Manual

Section 7
Measurement functions
7.2.2.9
7.2.2.10
206
time, is the difference between the recording length and the pre-trigger time.
Changing the pre-trigger time resets the history data and the current recording under
collection.

Operation modes

Disturbance recorder has two operation modes: saturation and overwrite mode. The
user can change the operation mode of the disturbance recorder with the Operation
mode parameter.
Saturation mode
In saturation mode, the captured recordings cannot be overwritten with new
recordings. Capturing the data is stopped when the recording memory is full, that is,
when the maximum number of recordings is reached. In this case, the event is sent via
the state change (TRUE) of the Memory full parameter. When there is memory
available again, another event is generated via the state change (FALSE) of the
Memory full parameter.
Overwrite mode
When the operation mode is "Overwrite" and the recording memory is full, the oldest
recording is overwritten with the pre-trigger data collected for the next recording.
Each time a recording is overwritten, the event is generated via the state change of the
Overwrite of rec. parameter. The overwrite mode is recommended, if it is more
important to have the latest recordings in the memory. The saturation mode is
preferred, when the oldest recordings are more important.
New triggerings are blocked in both the saturation and the overwrite mode until the
previous recording is completed. On the other hand, a new triggering can be accepted
before all pre-trigger samples are collected for the new recording. In such a case, the
recording is as much shorter as there were pre-trigger samples lacking.

Exclusion mode

Exclusion mode is on, when the value set with the Exclusion time parameter is higher
than zero. During the exclusion mode, new triggerings are ignored if the triggering
reason is the same as in the previous recording. The Exclusion time parameter controls
how long the exclusion of triggerings of same type is active after a triggering. The
exclusion mode only applies to the analog and binary channel triggerings, not to
periodic and manual triggerings.
When the value set with the Exclusion time parameter is zero, the exclusion mode is
disabled and there are no restrictions on the triggering types of the successive
recordings.
The exclusion time setting is global for all inputs, but there is an individual counter for
each analog and binary channel of the disturbance recorder, counting the remaining
exclusion time. The user can monitor the remaining exclusion time with the Exclusion
time rem parameter (only visible via communication, IEC 61850 data ExclTmRmn)
1MRS758407 B
SMU615
Technical Manual