time periods. The first send repetition occurs at the given cycle time set with the
parameter [IC]: Minimum Cycle Time. The cycles for the following send
repetitions result from a conditional equation with the increment set with the
parameter [IC]: Increment. Should no further state changes occur up to the
time when the maximum cycle time has elapsed [IC]: Maximum Cycle Time,
then GOOSE will be sent cyclically at intervals as set for the maximum cycle
time.
In order to have unambiguous identification of a GOOSE sent, characteristics
such as [IC]: Multicast MAC Address, [IC]: Application ID (hex),
[IC]: VLAN Identifier (hex), [IC]: VLAN Priority and
[IC]: GOOSE Identifier must be entered in the IED Configurator settings.
Further characteristics are [IC]: Dataset Reference and
[IC]: Configuration Revision.
Each GOOSE is given the state change index and the number of send repetitions.
3.4.4.2.3 Receiving GOOSE
With GOOSE up to 32 logic binary state signals as well as 32 two-pole contact
position signals from external devices (Ext.Devxx) can be received. For each
state signal or contact position signal to be received a specific GOOSE message
is to be selected, which will contain the information wanted, by setting
[IC]: Multicast MAC Address, [IC]: Application ID (hex),
[IC]: Source Path, [IC]: GOOSE Identifier and [IC]: DataSet Reference.
With the further setting of [IC]: Data Obj Index / Type, which corresponds to
the GOOSE position index and the information structure of the sending device,
the required information from the chosen GOOSE will be selected. The
identification features "VLAN identifier" and [IC]: Configuration Revision
that are also included in the GOOSE received will not be evaluated.
These parameters characterizing the information may be taken either from
device or project planning documentation of the sending device or from a
configuration file which is conform to IEC 61850. The IED Configurator will
support the import of .IID, .SCD and .MCL files when the "browse function"
(virtual key) is applied. The selection and acceptance of parameters from an
existing project planning is distinguished by a simplified and very reliable data
input.
Should the data type of the selected data object provide quality information then
this can be evaluated. When activating [IC]: Quality Obj Index the distance
of the quality descriptor to the data object (if not preset) must be given as well
as the quality criterion, which is to be tested. A signal is rejected when one of the
bits ([IC]: Invalidity Quality bits, see displayed bar with bit state) is received
as a set bit. These parameters are usually described in a configuration file and
are accepted from there during an import action.
Each GOOSE includes time information on the duration of validity of its
information. This corresponds to the double time period to the next GOOSE
repetition. If the duration of validity has elapsed without having received this
GOOSE again (i.e. because of a fault in communications), the signals received
will automatically be set to their respective default value
[IC]: Default Input Value. Which of the possible state values will set the
wanted security grade is dependent on the relevant application.
The following configuration (shuttling to the device functions) of the logic state
signals received from the logic node GosGGIO1 (GOOSE: Input 1 fct.assig.
(or Input 2, …, Input 32)) is made on the basis of the selection table of the binary
signal inputs (opto‑coupler inputs). Contact position signals received from
external devices (LN: DevGosGGIO3) are listed in the selection table for
interlocking equations of the function group ILOCK, which are available to design
a decentralized substation interlock.
3 Operation
P631
P631/EN M/R-11-C // P631-310-650 3-29
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