Protocol converter


Protocol converter

A Protocol Converter is a device used to convert standard or proprietary protocol of one device to the protocol suitable for the other device or tools to achieve the interoperability. There are varieties of protocols used in different fields like Power Generation, Transmission & Distribution, Oil & Gas, Automaton, Utilities, AMR, and Remote Monitoring applications. The major protocol translation messages involve conversion of data messages, events, commands and time synchronization.

General Architecture

The general architecture of a protocol converter include an internal master protocol communicating to the external slave devices and the data collected is used to update the internal database of the converter. When the external master requests for data, the internal slave collects the same from the database and send it to the external master. There will be different schemes for handling the spontaneous reporting of events and commands. There can be different physical medium for communication on protocol-X & Y which include RS232, RS485, Ethernet, etc.

Applications of Protocol Converters

Protocol Converter applications vary from industry to industry. The protocol converter can be a software converter, hardware converter or an integrated one depending on the protocols.

*Some of the key applications are:
**Substation Automation
**Building Automation
**Process Automation

The major protocols used in each area of application are listed under List of automation protocols.

Latency & Engineering Issues in using Protocol Converters

Protocol Converters are generally used for transforming data and commands from device or application to another. This necessarily involves transformation of data, commands, their representation, encoding and framing to achieve the conversion.

There are simple and complex type of conversions depending on the application and domain in which this is being used. The simplest and most commonly used conversion is protocol conversion between Modbus RTU and Modbus TCP. In this conversion, there is no change in the overall framing. Hence it is easy to take the Serial Modbus RTU frame and encapsulate it in a TCP/UDP Socket and send it over Ethernet. Since both the protocol framings are the same, except for the actual physical layer transmission, both the application layers will interpret data similarly as long as the communication interfaces are made transparent.

However, there do exist very complex conversions, where the data format, the data types supported, the object models etc., are so different that the conversion engine needs to make modification not only in framing, but need mapping information for each type of data and command and in some cases the object models. Also, there might be user configuration required in defining the mapping, and mapping non supported data types to supported data types.

These transformations though brings about conversion advantages, also brings about communication delay, processing latency and hence an overall end to end processing time which is finite and need to be considered in all solution design.

The latency of end to end communication depends on the processing delay of the hardware and/or software being used, the protocol & conversion complexity and the solution architecture. These latencies can vary for typical industrial and energy automation applications from 10-20 milli-seconds to as high as 1 second. Solution architectures using protocol converters need to consider this latency and how it will impact the project for which converters are being considered.

Also most such architectures would involve configuration and mapping which would involve considerable engineering effort and engineering time. These also need to be considered while defining project schedules.

ee also

*List of automation protocols
*Vehicle bus
*List of network protocols

External links

# [http://www.kalkitech.com/protocolconverter.htm Protocol Converters]
# [http://ieeexplore.ieee.org/iel5/9477/30071/01377736.pdf Protocol Converter for Real Time management system]
# [http://www.kalkitech.com/downindex/Impact_Of_Protocol_Converter_InSS_Comm.pdf White-Paper: Impact of using protocol converters for substation modernization projects using iec 61850]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • protocol converter —    A combined hardware and software product that converts from one network protocol to another; used when two dissimilar networks are connected.    See also gateway …   Dictionary of networking

  • Coupon-eligible converter box — TV Converter Box Coupon Program URL https://www.dtv2009.gov/[dead link] …   Wikipedia

  • Voice over Internet Protocol — (VoIP, IPAEng|vɔɪp) is a protocol optimized for the transmission of voice through the Internet or other packet switched networks. VoIP is often used abstractly to refer to the actual transmission of voice (rather than the protocol implementing… …   Wikipedia

  • Link Aggregation Control Protocol — The Link Aggregation Control Protocol (LACP) is a computer networking term and is part of IEEE specification 802.3ad that can control the bundling of several physical ports together to form a single logical channel. LACP allows a network device… …   Wikipedia

  • D54 (protocol) — D54 is an analogue lighting communications protocol used to control stage lighting. It was developed by Strand Lighting in the late 70s and originally designed to handle 384 channels. Though more advanced protocols exist such as Digital MultipleX …   Wikipedia

  • Fiber media converter — Fiber media converters are simple networking devices that make it possible to connect two dissimilar media types such as twisted pair with fiber optic cabling. They were introduced to the industry nearly two decades ago, and are important in… …   Wikipedia

  • PCNE — Protocol Converter for Non SNA Equipment …   Acronyms

  • PCNE — Protocol Converter for Non SNA Equipment …   Acronyms von A bis Z

  • List of automation protocols — This includes list of communication network protocols used for process or industrial automation, building automation and substation automation applications.Process automation protocols*FOUNDATION fieldbus*Profibus by PROFIBUS… …   Wikipedia

  • List of IBM products — The following is a list of notable products from the International Business Machines (IBM) Corporation and its predecessor corporations, beginning in the 1890s, and spanning punched card machinery, time clocks, and typewriters, via mainframe… …   Wikipedia