Table 5: GOOSE control block properties
GoCB property Description
GoCB name GOOSE control block name. The maximum length is 28 characters.
Application (AppID) A unique GOOSE Identification string for each GoCB in the system.
Recommendation is to define a device-specific value and not to use
the default empty value. The maximum length is 64 characters.
t(min) (ms)
Indicates the maximum response time in milliseconds to data
change. This time can be used by the receiver to discard messages
that are too old. In principle, t(min) can vary depending on the data
type, but for the IEDs, the value is always “10 ms” for sent data.
t(max) (ms)
Indicates the background "heartbeat" cycle time in milliseconds; the
default value is “10 000 ms”. If there are no data changes, the IED still
resends the message with the heartbeat cycle to enable the receiver
to detect communication losses, that is, the communication is
supervised.
Configuration Revision
Contains an integer value that is sent in every GOOSE message.
The integer indicates the amount of changes in the data set. The
receiver checks the message for configuration mismatches.
“Configuration Revision” cannot be manually edited in IET600.
MAC Address
Multicast MAC address to which the specific GOOSE data is sent.
The receiving IED filters the frames and starts to process them if a
specific multicast address is defined in the configuration. It is
recommended to have one unique multicast address per GoCB. The
address range for GOOSE Multicast addresses is 01-0C-
CD-01-00-00...01-0C-CD-01-01-FF
App ID
Unique HEX value application identifier for sending the GoCB within
the system. It identifies the purpose of this particular data set. The
value range is 0000...3FFF.
VLAN-ID
Used if the Ethernet switches in a station bus support VLAN. If static
VLAN identifiers are defined, it also affects the switch port
configuration. Value “000” indicates a non-configured VLAN and
switches do not filter these messages on a port basis. This is
recommended if there is no need to split the logical network. The
VLAN identifier is a 3-character HEX value with range 000...FFF.
Recommended values are 2...1001.
VLAN Priority
Used in networks supporting VLANs. The priority is used with
network switches. The default value for GOOSE is “4” and the value
range is 0...7.
With the IEDs of this product series, only t(max) is configurable, not
t(min).
The multicast MAC address is usually unique, and APP-ID must be
unique.
1MRS757809 C Section 5
GOOSE
REC615 and RER615 33
Engineering Guide
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