185
Serial communication
Chapter 12
Data communication
Table 181: Serial communication (RS485)
Table 182: Serial communication (SPA) via front
1.5
Serial communication, IEC (IEC 60870-5-103 protocol)
1.5.1
Application
This communication protocol is mainly used when a protection terminal communicates with a
third party control system. This system must have a program that can interpret the IEC
60870-5-103 communication messages.
1.5.2
Design
The IEC protocol may be used alternatively on a fibre optic or on an RS485 network. The fibre
optic network is point to point only, while the RS485 network may be used by multiple terminals
in a multidrop configuration.
The IEC 60870-5-103 protocol implementation in REx 5xx consists of these functions:
•
Event handling
•
Report of analog service values (measurements)
•
Fault location
•
Command handling
-
Autorecloser ON/OFF
-
Teleprotection ON/OFF
-
Protection ON/OFF
-
LED reset
-
Characteristics 1 - 4 (Setting groups)
•
File transfer (disturbance files)
Function
Value
Protocol
SPA/IEC 60870-5-103
Communication speed
9600 Bd
Function
Value
Protocol
SPA
Communication speed for the terminals
300, 1200, 2400, 4800, 9600 Bd
Slave number
1 to 899
Change of active group allowed
Yes
Change of settings allowed
Yes
Note!
The RS485 network shall be terminated properly according to the standard, either in the relay
terminal, by choosing the terminated RS485 interface, or externally as described in “Informa-
tive excerpt from EIA Standard RS485” in the Installation and commissioning manual.
Summary of Contents for REL 501-C1 2.5
Page 1: ...Technical reference manual Line distance protection terminal REL 501 C1 2 5 ...
Page 2: ......
Page 26: ...14 Introduction to the technical reference manual Chapter 1 Introduction ...
Page 42: ...30 Technical data Chapter 2 General ...
Page 66: ...54 Blocking of signals during test BST Chapter 3 Common functions ...
Page 142: ...130 Time delayed overvoltage protection TOV Chapter 6 Voltage ...
Page 162: ...150 Autorecloser AR Chapter 9 Control ...
Page 174: ...162 Event function EV Chapter 10 Logic ...
Page 210: ...198 Serial communication Chapter 12 Data communication ...
Page 226: ...214 Serial communication modules SCM Chapter 13 Hardware modules ...
Page 230: ...218 Terminal diagrams Chapter 14 Diagrams Figure 87 REL 501 C1 with DC switch ...
Page 234: ...222 Terminal diagrams Chapter 14 Diagrams ...
Page 237: ......