Hollysys PLC used in food manufacturing

Since the Profibus - DP in Europe was born ten years ago, with its advanced performance, convenient use, the application of economy and the general manufacturing users quickly accepted, so far has been to occupy the largest share of various kinds of fieldbus application number. In recent years, with the flourishing of fieldbus control system, promoted the Profibus - DP technology development, not only can be dispersed in the field of central control room is connected to the I/O, at the same time the traditional should be performed on the main control task down to the station from equipment, so as to realize the true sense of the distributed control system. Introduce below hollysys PLC is used for a large dairy milk, yogurt production line before processing and equipment control, implement local decentralized local control, centralized management of the whole application cases. The factory keep fresh milk, yogurt production line for nissan 200 tons of large-scale production line, the pretreatment part includes milk collection, pasteurization, stay put, mixing, bacteria culture, fermentation, expanding homogeneous/too cold, CIP cleaning, 12 subsystems such as energy consumption and production monitoring, product line covers an area of 50 & # 61620; 100 meters, more than 1200 I/O points. User requirement for control system is that all I/O status is controlled at the centralized monitoring, pasteurization, stay put, CIP cleaning three important subsystem implementation on-site display control, advanced and economical efficiency and the whole system, open to make spare parts does not depend on one supplier. Hollysys company have been put forward for the user requirements, as shown in the solution, finally accepted by users. System network for Profibus - DP, the main use Siemens PLC controller S7 - The 400 series S7 - 400 powerful enough to complete more than 1000 points of control tasks; By Profibus - DP connection of 22 local I/O box respectively installed next to each subsystem of equipment, minimizing consumption of the cable. Including pasteurization, stay put, CIP for three belt from the interface of the PLC, respectively, the implementation of the system control tasks, and to upload the main control state information, three from each brought a standing PLC touch screen as human-machine interface. Use from the station PLC can make the subsystems of the control is not due to accidental fault network downtime, waste the precious resources of milk. The PLC I/O and from the station in this system all use hollysys company PLC products. This choice for users to bring two advantages: first, to avoid use of foreign brand products make the system price is too high; Second hollysys PLC STEP 7 programming language that can be used with S7 - 400 is the same, users don't need to spend extra effort to learn. The project smooth implementation can prove hollysys PLC through Profibus - DP bus connected with Siemens and any Profibus certified products, and greatly extend the functionality of the DP bus, realize in the true sense of the fieldbus control system. 现场总线, DP technology is one of hollysys company to master the core technology, are widely used in the DCS and PLC, hollysys PLC system in small and medium-sized control system on the market with foreign famous companies stand on the same starting line. 'The adoption of this system enabled us to really understand the national brand of technical strength', director of the work for the system acceptance technical staff said, 'the performance can be comparable to the international advanced level, prices, fully considering the national conditions, combined with hollysys company reputation on security, this kind of cooperation should be a model of cooperation between the domestic famous enterprises of different industries. ”
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