Dnp Communications; Dnp Protocol - GE D90 Plus Instruction Manual

Line distance protection system

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Table of Contents

CHAPTER 6: COMMUNICATIONS

DNP communications

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL

Select the Settings > Communications > Modbus > User Map menu to open the Modbus

user map configuration window.

Figure 87: Modbus user map configuration settings

The following settings are available for each of the 256 registers.

Range: None, Settings, Actuals

Default: None

This setting indicates if the Modbus user map address represents a setting or an actual

Range: Modbus memory map address in decimal representation

This setting represents the value of the programmed Modbus memory map address.

The Distributed Network Protocol (DNP) allows for the optimization of control and data

acquisition between the equipment in the substation and the central control center. The

protocol is scalable; that is, it is designed to be compatible with the latest high speed LAN

technology yet still be implemented over slower speed serial links.

The DNP improves upon many master-slave protocols by improving overall

communication performance requirements and provides time-stamping with millisecond

Communications Guide for details on the DNP.

The DNP server can simultaneously support one client over serial RS485 and one client

over Ethernet or two clients over Ethernet. Level 3 is supported for parsing requests and

generating responses. It is capable of reporting any indication or measurement and

DNP COMMUNICATIONS