GE C30 Instruction Manual page 165

CHAPTER 5: SETTINGS
TxGOOSE1 ConfRev
Range: 0 to 4294967295 in steps of 1
Default: 1
The value entered sets the confRev value in published GOOSE messages, and can be used by subscribers to discriminate
TxGOOSE messages of the expected configuration revision from messages of a different revision. The standard requires
that confRef be incremented each time the members or the order of the members published is changed, and each time
the data set name is changed. The standard states that the value of 0 is reserved.
TxGOOSE1 RETRANS TIME
Range: 0 to 100 ms in steps of 1 ms
Default: 4 ms
If the entered time is non-zero, when a member value change is detected, four event transmissions are sent, then
heartbeat transmissions resume. The interval between the first and second event transmissions, and between the
second and third, is the time set here. The interval between the third and the fourth event transmission is double the set
time. If the entered time is zero, only a single event transmission occurs, then heartbeat transmissions resume.
TxGOOSE1 TIME TO LIVE
Range: 1 to 300 s in steps of 1 s
Default: 300 s
The value entered sets the timeAllowedtoLive value in published TxGOOSE1 messages. The standard requires
subscribers to assume a failure has occurred when another TxGOOSE1 message is not received within the published
timeAllowedtoLive time.
Base this setting on the TxGOOSE UPDATE TIME and the tolerable number of contiguous message delivery misses. For
example, if the heartbeat time is 10 s, and missing up to three successive messages is tolerable, make the setting 10*3 +
1 = 31 s. The extra second is to ensure that arrival of the third heartbeat transmission beats the timeAllowedtoLive timer.
The standard suggests that the heartbeat time be less than (actually half) of the timeAllowedtoLive parameter.
RxGOOSE
Navigate to Settings > Product Setup > Communications > IEC 61850 > GOOSE > RxGOOSE > RxGOOSE Messages.
IEC 61850, GOOSE is an efficient method for simultaneous high-speed delivery of the same generic substation event
information in a publishing physical device to more than one subscribing physical device. An RxGOOSE is a UR element
implementing a single IEC 61850 GOOSE message subscribing service. The publishing function in URs is performed by
TxGOOSE elements, as described in the previous section. Each C30 has 32 RxGOOSE elements. Each RxGOOSE element can
subscribe to GOOSE messages from a specified publisher. Subscribed messages can contain up to 64 of any set of data
attributes with basic types BOOLEAN, FLOAT32, INT32, Dbpos, TimeStamp, or Quality. Messages containing data objects,
that is to say structured data, are not accepted.
With these conditions, GOOSE messages from any device of any manufacturer that implements the IEC 61850 edition 1.0
or 2.0 GOOSE publish service can be subscribed to. The UR accepts both the variable-length encoded GOOSE messages
specified in IEC 61850-8-1:2004 and the Fixed-Length encoded GOOSE messages as specified in IEC 61850-8-1:2011
clause A.3.
Each enabled RxGOOSE monitors for interruption of the GOOSE messages that it subscribes to based on the value in the
timeAllowedtoLive field of the last message received. If a new message is not received within that time interval, the
RxGOOSE assumes that connectivity is lost. FlexLogic operands (for example, RxGOOSE1 On, RxGOOSE1 Off) reflect the
status of each RxGOOSE connectivity. RxGOOSE connectivity of an RxGOOSE with non-zero MAC address is also considered
lost after the C30 finishes restart until a message is received. When RxGOOSE connectivity is lost, a common RxGOOSE Fail
self-test activates.
Navigate to Settings > Product Setup > Communications > IEC 61850 > GOOSE > RxGOOSE > RxGOOSE Messages >
RxGOOSE1 to access the settings that specify the messages to be accepted by the first RxGOOSE element. Messages that
contain the value true in the ndsCom field are never accepted. Messages that contain the value true in the simulation field
(test field in edition 1.0 messages) are accepted only when the UR test mode is Forcible; see the Testing section at the end
of this chapter for details. The settings and functionality for the other RxGOOSE are similar.
C30 CONTROLLER SYSTEM – INSTRUCTION MANUAL
PRODUCT SETUP
5
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