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At present, industrial PC(IPC), the most widely used PC platform, leads PC technology to the automation era with open hardware/software, flexible system configuration and reduced system cost. However, due to the unstable nature of PC-based fan, hard disk, and Windows operating system, industrial PC is not recognized as a stable controller. So IPC is not the suitable information server connecting the factory to the enterprise information management system. Advantech's UNO-2000 series is one of the few reliable embedded platforms. It may be one of the most compact embedded platforms, easy to install in various types of equipments. 2 Features of UNO-2000 embedded network platform The UNO-2000 series provides several models based on different applications:
The UNO-2000 series has the following features:
3 The UNO-2000 series application in steel plants Steel plants have three main control systems: Hot Metal Pre-treatment, Converter, and Second-refiner. In order to improve productivity and enterprise management, administer manufacturing line, and optimize factory floor data management, it is essential to update the steel factory equipments The complete production process begins with Hot Metal Pre-treatment, two 80 ton Converters, RH and IR-UT Second-refiners until the hot carbon steel remains in the furnace. The process also includes relevant wastewater handling produced from furnace air emissions and coal gas purification. The second-refiner RH is a Vacuum Degassing Vessel, and IR-UT(Injection Refining--Up-Temperature) is a powder injection, up-temperature finery. Among these, both the 80 ton DC electric cooker steel making and the production process of continuous cylindrical blooms casting adopt IPC and S7-300. Automation control system in steel making consists of three levels: the first level is equipment control including equipment testing; the second level is process control with computers; and the third level is factory line system (FLS). During the production process, computer control, including mathematic models, technical calculation, information gathering, information handling, information display and information recording, exchanges information with Equipment Control and FLS via network communication. Because of the
long and complicated process of steel-making, Process Control is
separated into three subsystems according to the main three technical
processes: Hot Metal Pre-treatment subsystem, Converter subsystem
and Second-refiner subsystem. Each Process Control subsystem is
equipped with a large IPC assuming the production control of the
corresponding process. And an additional IPC is added to the Converter
subsystem as a standby and testing IPC. As the large
control systems for steel making are all whole sets of control systems,
we only add a few controllers in some control processes to streamline
facilities. For example, during the process of Hot Metal Pre-treatment,
two ADAM-5510 are added in order to monitor the on/off status of
some relays and contactors, and control the fan of the dust elimination
system. The Hot Metal Pre-treatment subsystem adopts several large
PLCs with RS-485 communication ports, so the UNO-2059 embedded network
platform was selected for its strong data handling and communication
control capabilities. The UNO-2059 collects control information
via RS-485, and connects to industrial-grade data gateway through
its Ethernet port, hence achieves seamless connection between the
factory floor and the enterprise. In the Second-refiner
process, the steel plant adopts a whole set of control system with
DeviceNet. In the system, an attached module, the CAN Controller
and other ADAM-4000 modules are added for further monitoring. In
order to achieve an integral information network, we adopted UNO-2160,
which converts DeviceNet protocol to Ethernet to achieve integration
of the bottom layer control information with the management information.
With IDE interface, UNO-2160 can install an additional HDD, and Windows CE provides powerful technology support. Thus, Windows CE has been installed in the two UNO-2160, embedded with enterprise firewall functionality to protect local control units (LCU).
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With
the quick development of network technology, communication technology
and "eAutomation" the informationalization path of enterprises also
speeds up. However, during the process of enterprise information
automation, large and medium national enterprises face the problem
of integrating the existing DCS control information, status parameters
and field information with enterprise information management to
achieve the three-layer information system of ERP (enterprise resource
planning), MES (manufacturing executive system) and PCS (production
control system), and connecting the enterprise information management
system seamlessly to the MIS and OA system. The most difficult problem
lies in different DCS information interfaces ranging from RS-485,
Profibus, DeviceNet, or CANbus. Thus, more customers are looking
for an embedded platform which can collect DCS information and allow
access to the information through the Ethernet. At the same time,
the platform can integrate with different operating systems and
industrial automation applications to provide the most effective
environment of connecting field information to the enterprise network.
This platform is equipped with the following features: