Section 16 Remote Communication; Binary Signal Transfer; Introduction; Principle Of Operation - ABB Relion 670 Series Technical Reference Manual

1MRK 505 208-UEN B
Section 16
16.1
16.1.1
16.1.2
Technical reference manual
Remote communication
About this chapter
This chapter describes the Binary signal transfer function and associated hardware
functionality. The way the functions work, their setting parameters, function
blocks, input and output signals, and technical data are included for each function.

Binary signal transfer

Function description
Binary signal transfer
Binary signal transfer

Introduction

The remote end data communication is used either for the transmission of current
values together with maximum 8 binary signals in the line differential protection,
or for transmission of only binary signals, up to 192 signals, in the other 670 series
IEDs. The binary signals are freely configurable and can, thus, be used for any
purpose, for example, communication scheme related signals, transfer trip and/or
other binary signals between IEDs.
Communication between two IEDs requires that each IED is equipped with an
LDCM (Line Data Communication Module). The LDCMs are then interfaces to a
64 kbit/s communication channel for duplex communication between the IEDs.
The IED can be equipped with up to two short range LDCM.

Principle of operation

The communication is made on standard ITU (CCITT) PCM digital 64 kbit/s
channels. It is a two-way communication where telegrams are sent every 5 ms
(same in 50 Hz and 60 Hz), exchanging information between two IEDs. The format
used is C37.94 and one telegram consists of start and stop flags, address, data to be
transmitted, Cyclic Redundancy Check (CRC) and Yellow bit (which is associated
with C37.94).
Remote communication
IEC 61850 IEC 60617
identification identification
BinSignReceive -
BinSignTransm -
Section 16
ANSI/IEEE C37.2
device number
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609