Communication; Communication Redundancy - ABB COM600 Product Manual

Grid Automation Controller
COM600
Product version: 4.0

13. Communication

COM600 is designed to support the
IEC 61850 standard, and can thereby
conveniently be integrated in IEC 61850
systems. Using the IEC 61850-8-1 GOOSE
profile COM600 supports GOOSE messaging
between the IEC 61850 compliant IEDs and
the Station Automation device COM600.
Further, COM600 supports GOOSE
messaging between several COM600 devices
in the system. Apart from IEC 61850,
COM600 supports a wide range of master
communication protocols. This enables
the connection of both IEC 61850 devices
and other devices which are not IEC 61850
compliant to the system. For example,
native IEC 61850 protection and control
IEDs can be connected to COM600 using
the IEC 61850 protocol while meters can be
connected to COM600 using the Modbus
protocol.
Due to the vast amount of by data generated
by modern IEC 61850 compliant devices
it may in some cases be necessary to limit
the amount of information presented to
the SCADA-system (Supervisory Control
And Data Acquisition) or DCS (Distributed
Control System) to avoid unnecessary
information overflow. This is achieved by
using the cross-reference tool of COM600
when mapping information to slave
protocols. Reducing information to higher-
level systems not only reduces load but also
increases security as it is possible to, for
example, disable control to a certain system.
COM600 can be configured as an IEC 61850
proxy server enabling the connection of
non IEC 61850 compliant devices to then
system. COM600 converts the incoming
data according to the IEC 61850 protocol.
The IEC 61850 proxy server of COM600
is thereby very useful during for example
extensions.
12
In addition, COM600 offers OPC client and
server connectivity. This enables data access
and data sharing between the non-electrical
system and the electrical system supporting
OPC.
14. Communication
redundancy
To maintain and improve the reliability of the
communication network and the communi-
cation between the IEDs and COM600, IEC
62439/PRP (parallel redundancy protocol)-
based communication is supported. PRP is
based on duplicated networks, where each
message is sent via both networks. The first
of the received messages is accepted whereas
the duplicate is discarded. Message replica-
tion and discarding is done by the DuoDriver
in COM600. Further, the DuoDriver hides
the two networks from upper level applica-
tions. IEC 62439/PRP-based communication
requires that COM600 is equipped with the
optional LAN card and that the IEDs used
support PRP.
In addition, COM600 supports switch fault
tolerance (SFT) provided that the optional
LAN-card and COM600 are connected to
two separate switches. SFT creates a failover
relationship between the two adapters con-
nected to separate switches. The manager
responsibility is transferred from one agent
to the other in case of a failure. The Switch
Fault Tolerance feature of the Intel network
adapter requires the Teaming Feature to be
enabled.
1MRS756764 D
ABB