The hottest new programmable controller PCC

Since the advent of the first PLC in the United States in the late 1960s, the programmable control technology has gone through 30 years of development, especially with the rapid development of computer technology and microelectronics technology in recent years, it has made great progress in software and hardware technology. The programmable computer controller PCC launched by Austrian br industrial automation company represents this development trend. In 2009, the output of composite polyurethane adhesive for plastic flexible packaging in China was about 215000 tons

compared with conventional PLC, the biggest feature of PCC is the design of time-sharing multitask operating system and diversified application software. Conventional PL exempts consumption tax on lithium-ion batteries, solar cells, fuel cells, etc. C mostly adopts a single task clock scanning or monitoring program to process the logic operation instructions of the program itself and the acquisition and refresh of the ground state of external i/o channels, In this way, the execution speed of PLC depends on the size of the application program, which is undoubtedly contrary to the high real-time control requirements in the i/o channel. PCC system software solves this problem. It uses time-sharing and multitasking mechanism to build the operation platform of its application software, so that the operation cycle of the application program is independent of the length of the program, but determined by the cycle of the operating system. Therefore, it distinguishes the scanning cycle of the application program from the real external control cycle, and meets the requirements of real-time control. Of course, This control cycle can be adjusted arbitrarily according to the actual requirements of users on the premise that the CPU computing capacity allows

based on such an operating system, the application program of PCC is composed of multi task modules, which brings great convenience to the development of project application software, because it can easily compile control program modules (tasks) according to the different functional requirements of each part of the control project, such as data acquisition, alarm, PID adjustment operation, communication control, etc., which operate independently of each other, And the data keeps a certain correlation. After (1) the independent preparation and debugging of dry friction contact surface without any lubricant, these modules can be downloaded to the CPU of PCC together. Under the scheduling management of multitask operating system, they can run in parallel and jointly realize the control requirements of the project, The diagram can be shown as follows:

Figure 1: PCC software system

based on the above powerful special operating system, PCC has incomparable flexibility in the design of application programs compared with conventional PLC