GE C70 Instruction Manual page 173

CHAPTER 5: SETTINGS
Each enabled TxGOOSE transmits its message whenever a value change is detected in one or more of its members. To
guard against the possibility that such a message is lost in the network before it reaches all subscribers, the message is
quickly retransmitted several times. To allow subscribers to verify that their link to the publisher and the publisher itself are
healthy, each message is also periodically retransmitted even while the values are unchanging. These latter messages are
known as heartbeat messages, while the former are known as event messages. Heartbeat messages also provide means
for a subscriber newly online to receive the published values in the absence of an event.
TxGOOSE1 and TxGOOSE2 scan for value changes in its FlexLogic operand members as frequently as such a change can
occur. TxGOOSE1 and TxGOOSE2 are therefore suitable for highly time critical signals, such as tripping and dynamic
blocking. FlexAnalog members are scanned for value changes only every 250 ms. See the Deadband Settings section later
for a description of what is considered a value change in an analog member.
The remaining TxGOOSE, meaning TxGOOSE3 and up, scan both their FlexLogic and FlexAnalog members for value
changes every 250 ms. They are suited for control applications, such as voltage control or power factor regulation.
The details of TxGOOSE message construction are contained in the UR Series Communications Guide. Knowledge of these
details is not required to configure GOOSE.
The UR does not implement the Fixed-Length encoded GOOSE messages option specified in IEC 61850-8-1:2011 clause
A.3; the UR always uses the ASN.1 Basic encoding rules (as specified in ISO/IEC 8825-1) as specified in IEC 61850-8-1:2004
and as optional in IEC 61850-8-1:2011 clause A.3. So do not try to configure the UR for fixed-offset TxGOOSE.
TxGOOSE
Navigate to Settings > Product Setup > Communications > IEC 61850 > GOOSE > TxGOOSE > Access Points to access
the settings that are common to all GOOSE messages published.
The following settings are available.
PORT1 GOOSE ENABLE
Range: Enabled, Disabled
Default: Enabled
When set to Disabled, no GOOSE messages are published on C70 Ethernet port 1, and any GOOSE messages received on
port 1 are ignored. When set to Enabled, all enabled GOOSE messages are published on C70 Ethernet port 1, and any
GOOSE messages received on port 1 are listened to.
C70 Ethernet ports 2 and 3 each have a similar setting.
TxGOOSE UPDATE TIME
Range: 1 to 60 s in steps of 1 s
Default: 60 s
This setting specifies the time interval between heartbeat messages, which are messages that are sent periodically
while no events are detected. The standard suggests that the heartbeat time be less than (actually half) of the
timeAllowedtoLive parameter, which is set by the TxGOOSE TIME TO LIVE settings described later.
Navigate to Settings > Product Setup > Communications > IEC 61850 > GOOSE > TxGOOSE > TxGOOSE1 to access the
settings for the first TxGOOSE. The settings and functionality for the others are similar.
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
PRODUCT SETUP
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