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Function State Explanation
Test
Health
Health signals if a selected function can perform its designated functionality. If so, the health is
functionality is only possible in a limited way or not at all, due to state or problems within the device, the
health will signal
Internal self-monitoring can cause functions to assume the health
tions). If a function assumes the health state
ated).
Only a few functions can signal the health state
specific supervision and - where it occurs - it is explained in the function description. If a function assumes the
Warning status, it will remain active, that is, the function can continue to work in a conditional manner and
trip in the case of a protection function.
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
The function is set to test mode. This state supports the commissioning. All outgoing infor-
mation from the function (indications and, if present, measured values) is provided with a
test bit. This test bit significantly influences the further processing of the information,
depending on the target.
For instance, among other things, it is possible to implement the functionality Blocking of
the command relay known from SIPROTEC 4.
Target of the Informa-
tion
Log
Contact
Light-emitting diode (LED) An indication routed to the LED triggers the LED (normal
CFC
Protocol
Warning (limited functionality) or Alarm (no functionality).
Processing
The indication is labeled Test in the log.
An indication routed to contact is not triggering the contact.
processing)
Here, the behavior depends on the state of the CFC chart.
•
CFC chart itself is not in test state:
The CFC chart is not triggered by a status change of infor-
mation with a set test bit. The initial state of the informa-
tion (state before test bit was set) is not processed during
execution of the CFC chart.
•
CFC chart itself is in test state:
The CFC chart continues to process the information (indica-
tion or measured value) normally. The CFC outgoing infor-
mation is provided with a test bit. The definitions in this
table apply to its continued processing.
A CFC chart can be set to the test state only by switching the
entire device to test mode.
Indication and measured value are transmitted with set test bit,
provided that the protocol supports this functionality.
If an object is transmitted as a GOOSE message, the test bit is set
spontaneously and the GOOSE message is transmitted immedi-
ately. The receiver of the GOOSE message is automatically noti-
fied of transmitter test mode.
If an object is transmitted via the protection interface, the test bit
is not transmitted. The
Test state must also be transmitted as
information for this state to be taken into account in the applica-
tion on the receiver end. You must route the
DIGSI 5 project tree → Device → Communication routing.
The test mode of the differential protection will be dealt with
separately in the application.
Alarm (see chapter
Alarm , it is no longer active (indication not active is gener-
Warning . The health state Warning results from function-
Basic Structure of the Function
2.3 Function Control
Test signal in the
OK . In case the
9 Supervision Func-
55
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