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Ladder diagram is widely used in PLC Program. The Compiling part of the ladder diagram of soft PLC is very important. According to the analysis of the compiling part of the PLC ladder diagram, this paper presents node method to compile it in the VC++ environment. The node method eliminates the traditional compilation process into the Instruction List. At last??Cthe correctness of the node method is...
The reconfigurable hardware has been widely applied in Computer Numerically Controlled (CNC) systems. The reconfigurable hardware provides high performance and flexibilities for the designer. This work presented a novel CNC controller architecture using reconfigurable hardware. Several logic modules, including a new resampling module for threading, are designed to support the reconfiguration process...
Reconfigurable devices have been developed to implement the control algorithms in Computer Numerically Controlled (CNC) systems recently. Reconfigurable devices provide high execution performance of CNC and flexibilities to the system design. However, little work was done on the implementation of reconfigurable logic in a CNC lathe. This paper developed a new resampling algorithm for the synchronized...
A CNC system which was based on embedded processors and embedded-real-time-operating system was structured. Its hardware platform which is of dual-CPU model is designed by ARM and DSP. This structure is used to control production process. FPGA module realizes systempsilas flexible manufacturing and reconfiguration. Due to the disadvantages of single task software structure this paper uses embedded...
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