Embedded Plc Development Background

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15 years ago, when I use the 8031 Controlled PPN bending machine, think how wonderful assembly language ah! But did 10 years all around the user process customized embedded board work, feeling as if into a boundless sea of bitterness. Propose a new user every small request, I have to change procedures, as long as the users have new needs, such work would not end.



12 years ago, I used data acquisition card, the I PC The use of C language to implement the Tangshan Rehe 82 m Roller Kiln Full computer control. Made dozens of Furnace Computer control system, I discovered the error into the system control. In the IPC to run real-time control algorithms, be too risky; with C, VC, configuration and software is hard no one recognized. Although Hard disk , Keyboard , The interface took a lot of after-sales service costs, the user ultimately abandoned Industrial Machine system. toshiba 2410

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The PLC for its high reliability, ten years the market expanded, a logic control in solving the same time, strengthen the functions of process control and increase the number of extension-specific modules, and their use up the market squeeze DCS down covering part of the embedded microcontroller applications market. PLC fieldbus, supporting human-machine interface and easy to learn and easy to use ladder language, so that plant electricians are easily accepted.



If the PLC to meet the technological requirements of users, who would also like to develop with the need for expensive cost of an embedded computer board or unstable system? Fortunately, the assumption, PLC has some shortcomings. Since the control object vary, technological requirements varied, even if a large number of expansion modules are available, too difficult to meet the technological requirements of a particular object. Otherwise, who will be embedded industrial control board?



Factory today Automation Personnel to develop software for the second one configuration, the second is the ladder language. This problem can be resolved if the two also used VB, VC to develop, it must be in the fudge! With all kinds of applications software development tools, both to improve the development speed, reduce development risk, and can save development costs. However, only in the PC configuration software machine (or a dedicated PC) running, ladder language only in the programmable logic controller PLC to run. PLC technology can not meet the constraints required by the user, not a ladder language, but the PLC hardware is not flexible enough.



Embedded PLC software is developed in such confusion in the beginning, which to PLC ladder language kernel, enhanced process control computing power, an open extended structure, increasing Network Interconnection function. It combines the special requirements of embedded boards, to carry forward the advantages of PLC ladder language, object-specific control provides a solution to the problem General Development platform.



Embedded PLC software is embedded microcontroller-oriented software design and development board (of course very easy to do the standard PLC), PLC poor problem solving (such as cost, hardware support, process confidential, etc.). In the early stages of development, trying to Uclinux, Uxwoek development environment, but on further into the discovery in order to achieve chip-level embedded (8-bit microcontroller), run Uclinux, COS / D chips are larger. A compilation of the final development options (for 51 series) language, is itself difficult, but in order to ensure the stability of applications, real-time, it is worth!



Scalability of embedded PLC software interfaces and protocols embodied in the expansion of the opening. The PLC world, various manufacturers have a field bus interface, such as Mitsubishi The CC? Link, Siemens The Profibus, etc.. But I took the CANbus, one of China's field bus standard DeviceNet (CANbus is the underlying protocol), and second, CANbus industrial market in China has become the de facto standard.



Embedded PLC software, network interconnection capacity is reflected in the embedded Web Server On the depth of cutting TCP / IP protocol (only running TCP / IP, ICM PA RP), in the remote end load-specific browser, you can remotely Monitor .



Embedded PLC software provides hard real-time interrupt system embodied in the custom kernel intervention task scheduling mechanism for high-speed real-time control system requirements (such as stepper drive, SCR phase trigger, etc.).



When I finish EASY-V1.00 embedded PLC software, it has the following features:



1, support for Mitsubishi, Delta and many other man-machine interface



2, support the ladder diagram programming (86 instructions)



3, support the CANbus interconnect (multiple machines in parallel operation or expansion unit)



4, support for third-party developers extend the wiring unit



5, to provide hard real-time, embedded user interfaces



EASY-V1.00 embedded PLC software for embedded microcontroller design provides a new design approach, designers pay more attention to interface and reliability, while the user process to the ladder language, only a few Number of I / O port number, drawing PCB Board, you can quickly launch products.



EASY-V1.00 embedded PLC software design will change the pattern of domestic PLC to PLC manufacturers can quickly design close to the terminal market of PLC, that is embedded PLC, also known as off more image formats PLC ( Customized PLC).



EASY-V1.00 Development Manager: Gong Yunsheng [Popular Keywords]: Kuwait Controls   PLC   Embedded Comment Large   In   Small