Alarm Supervision In Application; Diagnostic Counters - ABB RELION REC615 Engineering Manual

Section 5
GOOSE
5.7.3
5.7.4
54
The default value of the GOOSE receiver blocks output (OUT) is FALSE (0) in case
there is a communication error. This handling is applicable for all signal types (binary,
integer, enum and floating point). In addition to the default value handling, value
output signal automatically carries validity information to the application function
blocks. Validity information can be used in application by adding the quality function
blocks.
In communication disturbance cases, GOOSE receiver blocks use default values.
Application function blocks using these signals have their own handling for
propagated quality information and fail-safe functionality, especially when receiving
analog type of data. Exact fail-safe functionality must be checked from the function
block description in the technical manual.
If one relay application function block input receives several signals from several
protection relays, the input value is calculated in OR or AND operation (configured in
the Application Configuration tool) from several inputs. In this case, one default
signal is treated as logical FALSE (0), but the other signals can keep the function block
input value active. It works similarly as the traditional galvanic signal wires connected
between protection relays. The advantage in the GOOSE-based signalling is that the
application always detects faulty connections, which is not the case with the Normally
Open (NO) type of physically wired galvanic contacts.
In all cases, however, a separate alarm event is always generated by the
GSELPRT1.Alm data object for IEC 61850 event clients.
GSELPRT1.Alm can also be used on the application side as an input in the Signal
Matrix Tool's Binary Outputs sheet (signal GSELPRT ALARM).For example, it is
possible to change the setting group in case one or several protection relays are
disconnected from the network.

Alarm supervision in application

In a communication time-out situation, all the peer devices receive information about
the problem. The system does not tolerate single failures or non-existing devices, for
example, in service situations. Take this into account when designing an application.
Disable GOOSE sending by writing "false" from IEC 61850 clients to
the GoEna attribute under the GOOSE control block. Use this feature
carefully, and for test purposes only.

Diagnostic counters

The IEC 61850 data model of the protection relays includes a logical node
LD0.GSELPRT1 for the GOOSE communication diagnostic. The counters are also
available via the HMI or PCM600 path Monitoring/I/O Status/Communication/
GSELPRT1/Monitoring.
1MRS757809 C
REC615 and RER615
Engineering Guide