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After investigated the conception and features of PLC (Programmable Logic Controller) and embedded system, in this paper the conception of Quasi-PLC are proposed, which combine the advantages of PLC and embedded system. The architecture of Quasi-PLC and a Top-Down design method with collaboration design of software and hardware for Quasi-PLC embedded control system are researched then. Finally, setting...
The authors analyze the new requirements of the numerical control (NC) in network environment at present and propose a novel architecture of the network NC (NNC). In this architecture, the service-oriented NC system based embedded technology is the core part, providing abundant functions and more diversified processing abilities through networks. Both the hardware and software structures of the service-oriented...
Aiming at the inherent drawbacks of the traditional numerical control system based on industrial PC, the embedded numerical control service system based on Ethernet/Internet puts forward in the paper. The new system is constructed as a dual-CPU numerical control system, in which the ARM is defined as multi-machine NC management server that serve sharable functions for scheduling and execution control...
The paper mainly introduce the relationship between embedded technology and digital manufacturing, describes the application of embedded technology in digital manufacturing fields, and provides a typical example-NC system based on ARM and DSP, in which the ARM takes charge of the G code input, compiling and interpretation, the simulation display, the user's interface and the network interface etc,...
Workflow can be embedded in various e-commerce systems, e.g. product lifecycle management(PLM) or supply chain management(SCM) etc. - to streamline the process management. By analyzing the application background, this paper proposed a low level formal service framework as an infrastructure to support the embedded workflow running. To decrease the coupling of these services, a coordinational model...
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