Assembly Language: Techniques for Improved Programming
Assembly Language: Techniques for Improved Programming
Modelling and Analysis of Hybrid Supervisory Systems: A Petri Net Approach
Modelling and Analysis of Hybrid Supervisory Systems: A Petri Net Approach
ACMOS'09 Proceedings of the 11th WSEAS international conference on Automatic control, modelling and simulation
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Potato chips are product with irregular forms with complex flow dynamics. Packing with narrow tolerance is done by combinatorial weighing machine. For controlling this complex machine it is of great importance to have well designed human-machine interface (HMI). To minimize human intervention on machine operation of great importance is quality of its control algorithm. To gain an insight into the process of vibratory conveying and combinatorial weighing of potato chips experimental on-line setup was created. Setup contains refurbished combinatorial weigher and personal computer (PC) with network control structure. First, a short introduction to the chain of supplying, weighing and packing at potato chips production line is given. It is described briefly principle of combinatorial weighing. Next, experimental setup was described, from constructive parts, to hardware and software implementation. RS485 serial communication line with MODBUS protocol was used for networking master and three slave control units. Application software and implemented functions for making flexible development system are presented. HMI and MODBUS protocol were implemented with Visual Basic. Finally, tests results are given and show flexibility of setup in implementing real-time closed-loop control over MODBUS communication channel for combinatorial weigher at potato chips production line.