GE Industrial Solutions Entellisys 5.0 User Manual - Manual (Page 189)

IEC 61850 - GOOSE I/O 185
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10.2 IEC 61850 - GOOSE I/O
GOOSE is a subset of the IEC 61850 standard and is used to transmit and receive discrete and
analog information between devices. In Entellisys, GOOSE is implemented to communicate
discrete bits of information only – status or commands – to other IEC 61850 GOOSE compliant
devices.
Networking considerations
GOOSE messages are broadcast from an IEC 61850 compliant publisher as multicast ethernet
packets. Multicast packets do not have a destination IP address and therefore are transmitted
throughout the network. Typically routers and firewalls will prevent the propagation of multicast
packets in either direction. Care must be given to the implementation of control networks to
ensure transmission of GOOSE multicast packets reach the intended devices and do not add
unnecessary traffic to wide area networks.
Virtual LAN Technology
Virtual LAN technology permits the existence of a multicast-based control protocol and a
Building Control Network on existing network infrastructure without compromising security or
degrading the overall network performance. Networks are logically or virtually separated by
configuration on each network switch involved. Usually VLAN tags are added to ethernet
packets as they travel from switch to switch depending on the port assignment. In the case of
GOOSE, publishers will add the VLAN tag as it prepares the Ethernet packet.
GOOSE Publishers must be assigned a specific VLAN number which is added to the Multicast
ethernet message. By default, almost all switches are configured to allow the propagation of
VLAN ID 1 traffic to all ports. If a VLAN ID other than 1 is used, all ethernet switches between the
publisher and intended recipients must then be configured to propagate that VLAN number.
10.2.1 Goose Inputs
Configure Entellisys as a subscriber to 3rd party GOOSE publishers. When correctly configured,
the CPU will listen to incoming GOOSE messages and update GOOSE inputs 1- 64. These inputs
will then be available in Flexlogic and can be integrated into an overall control scheme.
Moreover, each GOOSE input can be setup to listen to a unique publisher.
Applying changes: When applying settings, both CPUs will be required to reboot. A dialog box
will prompt the user to continue through the Reboot process.
NOTE: Analog information points such as current and voltage are not supported through IEC
61850 but is available through Modbus TCP.