Manufacturing Message Specification

Manufacturing Message Specification (MMS) is an international standard (ISO 9506) dealing with messaging systems for transferring real time process data and supervisory control information between networked devices and/or computer applications. The standard is developed and maintained by the ISO Technical Committee 184 (TC184). MMS defines the following

MMS was standardized in 1990 under two separate standards as

This version of MMS used seven layers of as its communication stack:

Abstract Syntax Notation (ASN)- ISO 8824/8825

MAC - ISO 8802-4 [Token Ring]

Token Ring

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 instead of the bottom four layers of the original stack plus RFC 1006 ("ISO Transport over ") 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:

Abstract Syntax Notation (ASN)- ISO 8824/8825

Transmission Control Protocol (TCP) - RFC 793

Internet Protocol (IP)- RFC 791

Address Resolution Protocol (ARP)- RFC 826

MAC - ISO 8802-3 [Ethernet]

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

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