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.
8.2.1.10 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 of the corresponding analog or binary channel.
The Exclusion time rem parameter counts downwards.
8.2.2 Configuration
The user can configure the disturbance recorder with the PCM600 tool or any tool
supporting the IEC 61850 standard.
The user can enable or disable the disturbance recorder with the Operation
parameter under the Configuration/Disturbance recorder/General menu.
One analog signal type of the IED can be mapped to each of the analog channels of
the disturbance recorder. The mapping is done with the Channel selection
parameter of the corresponding analog channel. The name of the analog channel is
user-configurable. The user can modify it by writing the new name to the Channel
id text parameter of the corresponding analog channel.
Any external or internal digital signal of the IED which can be dynamically
mapped can be connected to the binary channels of the disturbance recorder. These
signals can be, for example, the start and trip signals from protection function
blocks or the external binary inputs of the IED. The connection is made with
dynamic mapping to the binary channel of the disturbance recorder using, for
example, SMT of PCM600. It is also possible to connect several digital signals to
one binary channel of the disturbance recorder. In that case, the signals can be
combined with logical functions, for example AND and OR. The user can
1YHT530004D05 D Section 8
Measurement functions
615 series 655
Technical Manual
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