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GE T35 UR Series User Manual

GE T35 UR Series
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B-2 T35 Transformer Protection System GE Multilin
B.1 MODBUS RTU PROTOCOL APPENDIX B
B
DATA: This will be a variable number of bytes depending on the function code. This may include actual values, set-
tings, 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. The RTU version of Modbus includes a 16-bit cyclic redundancy check
(CRC-16) with every packet which is an industry standard method used for error detection. If a Modbus slave device
receives a packet in which an error is indicated by the CRC, the slave device will not act upon or respond to the packet
thus preventing any erroneous operations. See the CRC-16 Algorithm section for details on calculating the CRC.
DEAD TIME: A packet is terminated when no data is received for a period of 3.5 byte transmission times (about 15 ms
at 2400 bps, 2 ms at 19200 bps, and 300 µs at 115200 bps). Consequently, the transmitting device must not allow gaps
between bytes longer than this interval. Once the dead time has expired without a new byte transmission, all slaves
start listening for a new packet from the master except for the addressed slave.
Modbus-TCP/IP communications takes place in ADUs (Application Data Units), which are wrapped in the TCP/IP/Ethernet
protocols. Ethernet provides layer 2 addressing and CRC-32 error checking. IP provides layer 3 addressing. TCP provides
communication establishment and ending and manages data flow. The Parallel Redundancy Protocol (PRP) can also be
used to provide seamless data flow in case of a single failure in the network, by using a combination of LAN duplication and
frame duplication. See chapter 5 for information on setting up TCP for Modbus (in the Modbus section), IP, and PRP (Net-
work section).
The following describes the ADU.
MBAP header: This Modbus Application Protocol header contains the following fields:
Transaction Identifier: Used for transaction pairing. The Modbus server copies in the response the transaction identifier
of the request.
Protocol Identifier: Used for intra-system multiplexing. The Modbus protocol is identified by the value 0.
Length: The length field is a byte count of the following fields, including the Unit Identifier and data fields.
Unit Identifier: For the purposes of the UR, this field is equivalent to the Modbus RTU SLAVE ADDRESS
field. The client must use the same value here as programmed in the UR setting
MODBUS SLAVE ADDRESS.
FUNCTION CODE: This is the same as the Modbus RTU function code field described above.
DATA: This is the same as the Modbus RTU data field described above.
B.1.4 MODBUS RTU CRC-16 ALGORITHM
The Modbus TPC/IP CRC-32 algorithm is universally executed in hardware, so there is no need to describe it here.
The Modbus RTU CRC-16 algorithm essentially treats the entire data stream (data bits only; start, stop and parity ignored)
as one continuous binary number. This number is first shifted left 16 bits and then divided by a characteristic polynomial
(11000000000000101b). The 16-bit remainder of the division is appended to the end of the packet, MSByte first. The result-
ing packet including CRC, when divided by the same polynomial at the receiver will give a zero remainder if no transmis-
sion errors have occurred. This algorithm requires the characteristic polynomial to be reverse bit ordered. The most
significant bit of the characteristic polynomial is dropped, since it does not affect the value of the remainder.
A C programming language implementation of the CRC algorithm will be provided upon request.
Table B–2: MODBUS TCP/IP FORMAT
DESCRIPTION SIZE
MBAP header Transaction identifier 2 bytes
Protocol identifier 2 bytes
Length 2 bytes
Unit identifier 1 byte
FUNCTION CODE 2 bytes
DATA N bytes

Table of Contents

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GE T35 UR Series Specifications

General IconGeneral
BrandGE
ModelT35 UR Series
CategoryProtection Device
LanguageEnglish

Summary

Getting Started

Important Procedures

Guides through initial setup, including safety precautions and inspection procedures.

UR Overview

Provides an overview of the UR series digital relays, their architecture, and important concepts.

EnerVista UR Setup Software

Details PC requirements and installation steps for the EnerVista UR Setup software.

UR Hardware

Covers mounting, wiring, and rear terminal layout of the UR series hardware.

Using the Relay

Explains faceplate keypad operation, menu navigation, relay activation, and passwords.

Product Description

Introduction

Introduces the T35 Transformer Protection System, its applications, features, and communication options.

Ordering

Details the order codes for different T35 configurations, including modules and options.

Replacement Modules

Information on ordering replacement modules for UR series devices, including order codes.

Specifications

Lists technical specifications for protection elements, including differential, thermal, and breaker arcing current.

Hardware

Description

Describes physical aspects of T35, including horizontal/vertical unit dimensions and panel cutout details.

Rear Terminal Layout

Illustrates the rear terminal view and explains the module slot assignment convention.

Wiring

Provides typical wiring diagrams and details for control power connections.

Human Interfaces

EnerVista UR Setup Software Interface

Overview of EnerVista UR Setup software, including its graphical interface and basic features.

EnerVista UR Setup Overview

Explains how to engage a device and use settings files for relay configuration.

Extended EnerVista UR Setup Features

Covers advanced features like settings templates, securing FlexLogic equations, and file traceability.

Faceplate Interface

Details enhanced and standard faceplate layouts, including LED indicators, keypad, and display.

Settings

Overview

Introduces the settings menu hierarchy and provides page references for various categories.

Product Setup

Covers security settings, including user accounts, CyberSentry, passwords, and access supervision.

System Setup

Details AC input configurations, power system settings, signal sources, and transformer parameters.

FlexLogic

Explains FlexLogic architecture, operators, equations, and timers for customized relay logic.

Grouped Elements

Describes the use of setting groups for different operating situations and transformer differential elements.

Control Elements

Covers control elements such as trip buses, selector switches, digital counters, and monitoring elements.

Inputs and Outputs

Details contact inputs, virtual inputs, remote devices, direct I/O, and teleprotection configurations.

Transducer Inputs and Outputs

Explains DCmA inputs, RTD inputs, and DCmA outputs for connecting external transducers.

Testing

Covers test modes, force contact inputs/outputs, and relay self-tests for verifying functionality.

Actual Values

Overview

Introduces the actual values menu, including status, metering, and product information sections.

Status

Displays the current state of contact inputs, virtual inputs, remote devices, communications, and Ethernet links.

Metering

Provides conventions for power and energy, phase angles, and symmetrical components.

Records

Accesses user-programmable fault reports, event records, oscillography, data logger, and breaker maintenance data.

Product Information

Shows model information, order codes, serial number, MAC address, and firmware revisions.

Commands and Targets

Commands

Lists commands for relay operations, including virtual inputs, clear records, and relay maintenance.

Targets

Explains target messages, priority status, and self-test error messages for diagnostics.

Security

User Accounts

Covers enabling security management, adding users, and modifying user privileges.

CyberSentry

Details CyberSentry security features, including authentication, RBAC, and remote authentication.

Commissioning

Differential Characteristic Test

General procedures for testing differential restraint, minimum pickup, slope, and breakpoint parameters.

Differential Characteristic Test Examples

Illustrates current distribution and test procedures for Y/y0° and Yg/D30° transformers with phase faults.

Inrush Inhibit Test

Details the procedure for testing inrush inhibit using secondary injection with adjustable second harmonic component.

Overexcitation Inhibit Test

Explains the test procedure for overexcitation inhibit using adjustable 5th harmonic component.

Commissioning Test Tables

Contains tables for differential restraint and inrush inhibit tests with sample data for verification.

Maintenance

Modules

Explains module withdrawal/insertion, safety precautions, and module compatibility with CPUs.

Batteries

Instructions for replacing the real-time clock battery and proper disposal of batteries.

Uninstall and Clear Files and Data

Covers unit decommissioning, clearing settings files, and managing COMTRADE or .csv files.

Repairs

Outlines the process for returning the device to the factory for repair, including RMA and shipping.

Storage

Guidelines for storing the unit indoors in a cool, dry place and powering it up periodically.

Disposal

Disposal requirements for the unit and battery, and module removal for recycling.

Appendix A

Parameter Lists

Lists FlexAnalog parameters with address, name, units, and description for analog inputs.

FlexAnalog Items

Details FlexAnalog parameters accessible via web browser or keypad, showing address and description.

FlexInteger Items

Lists FlexInteger items viewable via web browser, including address, name, units, and description.

Appendix B

Modbus RTU Protocol

Covers Modbus RTU protocol, physical layer, data link layer, and packet format.

Modbus RTU CRC-16 Algorithm

Explains the Modbus RTU CRC-16 algorithm for error checking and data stream processing.

Modbus Function Codes

Lists supported Modbus function codes and details packet transmission examples for various function codes.

File Transfers

Covers obtaining relay files via Modbus, COMTRADE/oscillography/data logger files, and reading oscillography files.

Memory Mapping

Provides the Modbus memory map with addresses, register names, ranges, and default values.

Appendix C

Overview

Introduces IEC 61850 standard, its components, and communication profiles.

Server Data Organization

Explains IEC 61850 object-oriented structure, including logical nodes and data objects.

Server Features and Configuration

Details reporting, file transfer, timestamps, logical device names, and location settings.

Generic Substation Event Services: GSSE and GOOSE

Describes GSSE and GOOSE services, fixed and configurable GOOSE, and their configurations.

IEC 61850 Implementation via EnerVista UR Setup

Guides on creating ICD files and configuring IEC 61850 settings using EnerVista UR Setup.

Configuring IEC 61850 Settings

Covers customizing IEC 61850 related settings like IP addresses, logical node prefixes, and GOOSE configurations.

About ICD Files

Explains ICD file structure, including header, communication, IED sections, and DataTypeTemplates.

Creating an ICD File with EnerVista UR Setup

Procedure to create an ICD file from a T35 IED or offline settings file using EnerVista UR Setup.

About SCD Files

Discusses SCD files generated by system configurators, including substation project creation and IED configuration.

Importing an SCD File with EnerVista UR Setup

Step-by-step guide to update the T35 with new configuration from an SCD file using EnerVista UR Setup.

ACSI Conformance

Outlines ACSI basic conformance and models conformance statements for services.

Logical Nodes

Lists IEC 61850 logical nodes supported by UR-series relays, categorized by function.

Appendix D

IEC 60870-5-104 Protocol

Covers interoperability, network configuration, physical layer, and link layer details of IEC 60870-5-104.

Interoperability

Explains system or device definition, network configuration, and physical layer aspects.

Point List

Details DNP/IEC 104 point lists for binary input/MSP and analog input/MME points.

Appendix E

Device Profile Document

Provides DNP v3.00 Device Profile, including supported objects, functions, and data link layer parameters.

DNP v3.00 Device Profile

Details vendor name, device name, DNP level, supported objects, functions, and data link layer parameters.

DNP Point Lists

Lists DNP binary input points and binary/control relay output points.

Binary Input Points

Configures DNP binary input points, including static object number, change event object, and request codes.

Binary and Control Relay Output

Lists DNP binary output status points and control relay output blocks, including object numbers and request codes.

Counters

Details binary and frozen counters, including object numbers, supported function codes, and variation.

Analog Inputs

Explains DNP analog input data points, deadbands, and scaling factors.

Appendix F

Change Notes

Lists major updates for T35 manual revisions, detailing page changes, descriptions, and sections.

Revision History

Provides a history of manual revisions, including manual P/N, T35 revision, release date, and ECO.

Changes to the T35 Manual

Details major updates for T35 manual revisions Y4, Y3, and Y2, specifying page changes and descriptions.

Abbreviations

Lists standard abbreviations used in the manual, covering technical terms and device components.

Warranty

Outlines GE Multilin warranty terms, including duration and conditions for products shipped after Oct 2013.

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