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Manufacturing Message Specification

International standard for messaging systems

Summary

International standard for messaging systems

Field	Value
title	Manufacturing Message Specification
abbreviation	MSS
status	Published
year_started
first_published
version	2
version_date
organization	International Organization for Standardization
series	ISO 9506
editors	ISO/TC 184/SC 5
authors	ISO/TC 184/SC 5 (Interoperability, integration, and architectures for enterprise systems and automation applications)
domain	Automation systems and integration
license	single-user licence
website

A set of standard objects which must exist in every device, on which operations like read, write, event signaling etc. can be executed. Virtual manufacturing device (VMD) is the main object and all other objects like variables, domains, journals, files etc. comes under VMD.
A set of standard messages exchanged between a client and a server stations for the purpose of monitoring or controlling these objects.
A set of encoding rules for mapping these messages to bits and bytes when transmitted.

MMS original communication stack

MMS was standardized in 1990 under two separate standards as

ISO/IEC 9506-1 (2003): Industrial Automation systems - Manufacturing Message Specification - Part 1: Service Definition
ISO/IEC 9506-2 (2003): Industrial Automation systems - Manufacturing Message Specification - Part 2: Protocol Specification This version of MMS used seven layers of OSI network protocols as its communication stack:

Physical	Ethernet

MMS stack over TCP/IP

Because the Open Systems Interconnection protocols are challenging to implement, the original MMS stack never became popular. In 1999, Boeing created a new version of MMS using Internet protocols instead of the bottom four layers of the original stack plus RFC 1006 ("ISO Transport over TCP") in the transport layer. The top three layers use the same OSI protocols as before.

In terms of the seven-layer OSI model, the new MMS stack looks like this:

Physical	Ethernet

With the new stack, MMS has become a globally accepted standard.

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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