Title :
On the scheduling of MMS services
Author_Institution :
Dept. of Comput. Eng., Swiss Federal Inst. of Technol., Lausanne, Switzerland
Abstract :
The manufacturing message specification (MMS) was developed to deal with the problem of proprietary communication protocols and incompatible manufacturing devices found in industrial applications. In this paper we briefly present a state model for the execution of MMS services that allows to better understand how services are dealt with in MMS servers. This model is then used to propose an extension to MMS. With this extension MMS services can be given priorities and can be scheduled for execution in MMS servers according to these priorities. The assignment of priorities to services is not considered in the MMS standard. Our solution has the advantage of avoiding any modification to the MMS protocol and remains compatible with existing MMS applications. This study is a step in the direction of providing real-time MMS servers, a critical issue not well understood yet
Keywords :
industrial control; local area networks; protocols; scheduling; MMS protocol; incompatible manufacturing devices; industrial applications; manufacturing message specification services; proprietary communication protocols; real-time MMS servers; Application software; Communication industry; Communication standards; Computer aided manufacturing; Computer industry; Delay; Job shop scheduling; Manufacturing industries; Processor scheduling; Protocols;
Conference_Titel :
Factory Communication Systems, 1995. WFCS '95, Proceedings., 1995 IEEE International Workshop on
Conference_Location :
Leysin
Print_ISBN :
0-7803-3059-5
DOI :
10.1109/WFCS.1995.482702
