MMS Protocol Stack and API
Manufacturing Message Specification (MMS) is an international standard (ISO 9506) and messaging system 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:
- 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 and/or controlling these objects.
- A set of encoding rules for mapping these messages to bits and bytes when transmitted.