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2.5 Communication
The IED supports a range of communication protocols including IEC 61850, IEC
60870-5-103 and Modbus
®
. Operational information and controls are available
through these protocols. However, some communication functionality, for
example, horizontal communication between the IEDs, is only enabled by the IEC
61850 communication protocol.
The IEC 61850 communication implementation supports all monitoring and
control functions. Additionally, parameter settings, disturbance recordings and
fault records can be accessed using the IEC 61850 protocol. Disturbance recordings
are available to any Ethernet-based application in the standard COMTRADE file
format. The IED can send and receive binary signals from other IEDs (so-called
horizontal communication) using the IEC61850-8-1 GOOSE profile, where the
highest performance class with a total transmission time of 3 ms is supported.
Furthermore, the IED supports sending and receiving of analog values using
GOOSE messaging. The IED meets the GOOSE performance requirements for
tripping applications in distribution substations, as defined by the IEC 61850
standard. The IED can simultaneously report events to five different clients on the
station bus.
The IED can support five simultaneous clients. If PCM600 reserves one client
connection, only four client connections are left, for example, for IEC 61850 and
Modbus.
All communication connectors, except for the front port connector, are placed on
integrated optional communication modules. The IED can be connected to Ethernet-
based communication systems via the RJ-45 connector (100Base-TX) or the fibre-
optic LC connector (100Base-FX).
For the correct operation of redundant loop topology, it is essential that the external
switches in the network support the RSTP protocol and that it is enabled in the
switches. Otherwise, connecting the loop topology can cause problems to the
network. The IED itself does not support link-down detection or RSTP. The ring
recovery process is based on the aging of the MAC addresses, and the link-up/link-
down events can cause temporary breaks in communication. For a better
performance of the self-healing loop, it is recommended that the external switch
furthest from the IED loop is assigned as the root switch (bridge priority = 0) and
the bridge priority increases towards the IED loop. The end links of the IED loop
can be attached to the same external switch or to two adjacent external switches. A
self-healing Ethernet ring requires a communication module with at least two
Ethernet interfaces for all IEDs.
Section 2 1YHT530004D05 D
615 series overview
42 615 series
Technical Manual
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