Communications Guide 345 Transformer Protection System

288 Pages·2011·7.22 MB·English

Title page
GE Digital Energy
Multilin
345
Transformer Protection System
Transformer protection and control
Communications Guide
SR345 revision: 1.41
Manual P/N: 1601-9099-A3
GE publication code: GEK-113570B
Copyright © 2010 GE Multilin
GE Multilin
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: [phone] Fax: [phone]
Internet: http://www.GEmultilin.com GE Multilin's Quality
Management System is
registered to ISO9001:2000
*1601-9099-A3* QMI # 005094
© 2010 GE Multilin Incorporated. All rights reserved.
GE Multilin SR345 Transformer Protection System Communications Guide for revision 1.41.
SR345 Transformer Protection System, EnerVista, EnerVista Launchpad, and EnerVista SR3
Setup, are registered trademarks of GE Multilin Inc.
The contents of this manual are the property of GE Multilin Inc. This documentation is
furnished on license and may not be reproduced in whole or in part without the permission
of GE Multilin. The content of this manual is for informational use only and is subject to
change without notice.
Part number: 1601-9099-A3 (December 2010)
TOC
Table of Contents
1. COMMUNICATIONS INTERFACES
2. RS485 INTERFACE Electrical Interface...............................................................................................................................1
MODBUS Protocol ................................................................................................................................2
Data Frame Format and Data Rate.........................................................................................................2
Data Packet Format ........................................................................................................................................2
Error Checking ...................................................................................................................................................3
CRC-16 Algorithm.............................................................................................................................................3
Timing ....................................................................................................................................................................4
345 supported functions...............................................................................................................................4
DNP protocol settings ........................................................................................................................5
DNP communication.......................................................................................................................................5
DNP device profile............................................................................................................................................6
DNP implementation ......................................................................................................................................8
DNP serial EnerVista Setup ....................................................................................................................... 12
DNP general ..................................................................................................................................................... 14
IEC 60870-5-103 serial communication ................................................................................ 15
Interoperability ...............................................................................................................................................16
Application level ............................................................................................................................................. 20
Data management ....................................................................................................................................... 21
103 general settings .................................................................................................................................... 24
3. ETHERNET SNTP ...........................................................................................................................................................1
INTERFACE SNTP settings......................................................................................................................................................1
SNTP modes........................................................................................................................................................1
MODBUS TCP/IP ....................................................................................................................................3
Data and control functions..........................................................................................................................3
Exception and error responses..................................................................................................................9
Request response sequence.......................................................................................................................9
CRC....................................................................................................................................................................... 10
DNP Ethernet protocol settings.................................................................................................. 12
DNP communication.................................................................................................................................... 12
DNP device profile......................................................................................................................................... 13
DNP port allocation ...................................................................................................................................... 15
DNP implementation ................................................................................................................................... 16
DNP Ethernet EnerVista Setup ................................................................................................................ 20
DNP general ..................................................................................................................................................... 22
IEC60870-5-104 protocol .............................................................................................................. 23
IEC 60870-5-104 interoperability........................................................................................................... 23
IEC 60870-5-104 protocol settings ....................................................................................................... 31
IEC 60870-5-104 point lists....................................................................................................................... 31
Summary of Ethernet client connections .............................................................................. 33
345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE toc–i
TOC
4. SR3 IEC61850 Simplified SR3 IEC61850 GOOSE configuration..................................................................... 1
GOOSE SR3 GOOSE capabilities................................................................................................................................. 2
Setting up the SR3 GOOSE Configurator............................................................................................... 3
Simplified SR3 IEC61850 GOOSE messaging .......................................................................... 5
Connection.......................................................................................................................................................... 5
Configuration ..................................................................................................................................................... 6
SR3 GOOSE configuration via the IEC 61850 configurator ........................................... 18
Introduction to the SR3 IEC61850 Device Configurator .............................................................18
SR3 GOOSE configuration - Lab ..............................................................................................................23
SR3 IEC 61850 GOOSE details ..................................................................................................... 38
EnerVista SR3 Setup software structure .............................................................................................39
GOOSE transmission.....................................................................................................................................41
GOOSE Rx...........................................................................................................................................................43
GOOSE Rx status ............................................................................................................................................43
GOOSE Rx headers ........................................................................................................................................45
GOOSE receive dataset structure...........................................................................................................46
GOOSE remote inputs ..................................................................................................................................47
IEC 61850 Logical Nodes............................................................................................................... 50
System logical nodes (LN Group: L)........................................................................................................50
Logical Nodes for protection functions (LN Group:P) ....................................................................51
Logical nodes for protection related functions (LN Group: R) ...................................................56
Logical Nodes for generic references (LN Group: G) ....................................................................56
Logical Nodes for metering and measurement (LN Group: M).................................................59
Logical Nodes for switchgear (LN Group: X) ......................................................................................62
IEC 61850 Common Data Class ................................................................................................. 63
Common data class specifications for status information ........................................................63
Common data class specifications for measurand information.............................................67
Common data class specifications for controllable status information..............................70
Common data class specifications for description information..............................................72
5. USB INTERFACE MODBUS Protocol ................................................................................................................................ 1
Data Frame Format and Data Rate ........................................................................................................ 1
Data Packet Format........................................................................................................................................ 1
Error Checking................................................................................................................................................... 2
CRC-16 Algorithm ............................................................................................................................................ 2
Timing.................................................................................................................................................................... 3
345 supported functions .............................................................................................................................. 3
6. MODBUS MEMORY MODBUS memory map..................................................................................................................... 1
MAP Format Codes ..................................................................................................................................... 61
7. MODBUS Function Code 03H ............................................................................................................................. 1
FUNCTIONS Function Code 04H ............................................................................................................................. 3
Function Code 05H ............................................................................................................................. 4
Function Code 06H ............................................................................................................................. 5
Function Code 07H ............................................................................................................................. 6
Function Code 08H ............................................................................................................................. 7
toc–ii 345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
TOC
Function Code 10H..............................................................................................................................8
Error Responses....................................................................................................................................9
Force coil commands...................................................................................................................... 10
Performing Commands Using Function Code 10H........................................................... 12
8. USING THE MODBUS User Map..............................................................................................................................2
MODBUS USER MAP
345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE toc–iii
TOC
toc–iv 345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
Digital Energy
Multilin
SR345 Transformer Protection
System
Chapter 1: Communications
interfaces
Communications interfaces
The 345 has three communications interfaces. These can be used simultaneously:
• RS485
• USB
• Ethernet
345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE 1–1
CHAPTER 1: COMMUNICATIONS INTERFACES
1–2 345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
Digital Energy
Multilin
SR345 Transformer Protection
System
Chapter 2: RS485 interface
RS485 interface
The hardware or electrical interface in the 345 is two-wire RS485. In a two-wire link, data is
transmitted and received over the same two wires. Although RS485 two wire
communication is bi-directional, the data is never transmitted and received at the same
time. This means that the data flow is half duplex.
NOTE: Polarity is important in RS485 communications. The '+' (positive) terminals of every device
must be connected together.
NOTE
Electrical Interface
The hardware or electrical interface in the 345 is two-wire RS485. In a two-wire link, data is
transmitted and received over the same two wires. Although RS485 two wire
communication is bi-directional, the data is never transmitted and received at the same
time. This means that the data flow is half duplex.
RS485 lines should be connected in a daisy chain configuration with terminating networks
installed at each end of the link (i.e. at the master end and at the slave farthest from the
master). The terminating network should consist of a 120 W resistor in series with a 1 nF
ceramic capacitor when used with Belden 9841 RS485 wire. Shielded wire should always
be used to minimize noise. The shield should be connected to all of the 345s as well as the
master, then grounded at one location only. This keeps the ground potential at the same
level for all of the devices on the serial link.
NOTE: Polarity is important in RS485 communications. The '+' (positive) terminals of every device
must be connected together.
NOTE
345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE 2–1
MODBUS PROTOCOL CHAPTER 2: RS485 INTERFACE
MODBUS Protocol
The 345 implements a subset of the Modicon Modbus RTU serial communication standard.
The Modbus protocol is hardware-independent. That is, the physical layer can be any of a
variety of standard hardware configurations. This includes USB, RS485, fibre optics, etc.
Modbus is a single master / multiple slave type of protocol suitable for a multi-drop
configuration.
The 345 is always a Modbus slave. It can not be programmed as a Modbus master.
Computers or PLCs are commonly programmed as masters.
Both monitoring and control are possible using read and write register commands. Other
commands are supported to provide additional functions.
The Modbus protocol has the following characteristics.
• Address: 1 to 254
• Supported Modbus function codes: 3, 4, 5, 6, 7, 8, 10
Data Frame Format and Data Rate
One data frame of an asynchronous transmission to or from a 345 typically consists of 1
start bit, 8 data bits, and 1 stop bit. This produces a 10 bit data frame. This is important for
transmission through modems at high bit rates.
Modbus protocol can be implemented at any standard communication speed. The 345
supports operation at 9600, 19200, 38400, 57600, and 115200 baud.
Data Packet Format
A complete request/response sequence consists of the following bytes (transmitted as
separate data frames):
Master Request Transmission:
SLAVE ADDRESS: 1 byte
FUNCTION CODE: 1 byte
DATA: variable number of bytes depending on FUNCTION CODE
CRC: 2 bytes
Slave Response Transmission:
SLAVE ADDRESS: 1 byte
FUNCTION CODE: 1 byte
DATA: variable number of bytes depending on FUNCTION CODE
CRC: 2 bytes
SLAVE ADDRESS: This is the first byte of every transmission. This byte represents the user-
assigned address of the slave device that is to receive the message sent by the master.
Each slave device must be assigned a unique address and only the addressed slave will
respond to a transmission that starts with its address. In a master request transmission the
SLAVE ADDRESS represents the address of the slave to which the request is being sent. In a
slave response transmission the SLAVE ADDRESS represents the address of the slave that is
sending the response.
FUNCTION CODE: This is the second byte of every transmission. Modbus defines function
codes of 1 to 127.
DATA: This will be a variable number of bytes depending on the FUNCTION CODE. This may
be Actual Values, Setpoints, or addresses sent by the master to the slave or by the slave to
the master.
CRC: This is a two byte error checking code.
2–2 345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE