In the USA and in the Far East, the CAN-based DeviceNet is one of the most successful networks for factory automation. DeviceNet specification maintained by the Open DeviceNet Vendor Association (ODVA) includes device profiles. In Europe, few system designers have chosen CANopen for similar applications.
Lafarge, a supplier of building materials such as cement, concrete and aggregate installed DeviceNet in its Alpena cement-producing facility, generating approximately 2.5 million tons per year. Five large rotary kilns operate 24 hours a day and run every day of the year, except for an annual maintenance shutdown. Approximately 500 motors, varying in size from one half to 450 kW/h, run various kiln functions. The loss of a critical motor could shut a kiln down and dramatically impact on the plant’s productivity and its profitability – especially since the five kilns average more than 9,500 tons of clinker a week.
Another typical DeviceNet application is the Modelo brewery in Mexico producing the famous Corona beer. The challenge to Sasib Beverage system house was to install a high-speed line while preserving production on the existing line. Additionally, the facility spreads over a wide area, introducing the need to distribute intelligence through long production lines, up to 100 m in length. The brewers needed to be able to integrate different pieces of equipment, motors, PLC’s I/O modules and operator interface terminals, without filling up the plant with cables. This was achieved by using DeviceNet.
One of the first DeviceNet users, Rhode Island Beverage, installed two bottling lines using hard-wired I/O. Retrofitting the bottling line with DeviceNet helped reducing installation costs, improved system performance and responds to changes in the marketplace. The company’s experience in upgrading this line demonstrates the benefits that today’s emerging device network technologies can deliver throughout the life cycle of an automation control system.
For further information visit the DeviceNet website