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          公司新闻

          01/04/2003

          A new line at the Saint-Gobain Glass Chantereine plant (France)

          The Chantereine plant of Saint-Gobain Glass (France) now boasts a new line with an annual production of 300,000 tons of flat glass. The cutting zone, responsible for the cutting and lifting of plates, is controlled by an automated system developed by the Italian glass industry manufacturer Bottero. Its monitoring function communicates with Schneider Electric Premium PLCs and Altivar 58 variable speed drives.

          "The flat glass manufacturing operations at our Chantereine plant depend on a single production line that encompasses all the manufacturing phases, from raw materials, furnace, float and cutting, up to warehousing and delivery. With an output of 600 tons of flat glass per day, and in order to meet growing market demand of around 8 % per year, we decided to develop new facilities. To this effect, after drafting the specifications, we entrusted the engineering to Bottero, an Italian firm specializing in turn-key cutting lines. At our request, they collaborated with Schneider Electric to define the automated system and supply the programmable logic controllers and variable speed drives", said Philippe Heringuez, Head of the Saint-Gobain Glass Chantereine plant.

          > Monitoring and redundant automation
          The entire cutting zone is controlled by an automated system developed and implemented by Bottero. It comprises a monitoring system, an optimization system and programmable logic controllers linked to variable speed drives.
          The monitoring function (FIX32 by Intellution) relies on two redundant servers installed in the control station, and a dozen client stations located along the production line at the level of the cutting bridges and lifters. The monitoring function is connected to the production line control system and provides flow management, operations monitoring, defects and alarms…
          The automated system directs the path of the plates according to their dimensions and the availability of lifters.
          Eight Premium PLCs and sixty or so Altivar 58 variable speed drives, all supplied by Schneider Electric, are allocated to controlling the array of conveyors and lifters.
          Two redundant controllers (Premium warm standby) control the speed of advance of the plates along the line with a points switching system that provides access to one or other group of lifters.
          Altivar 58 variable speed drives control the speed of conveyors
          The PLCs, via a Fipio link, control a dozen Altivar 58F drives that control the conveyor motors. Using closed loop vector flow control with sensors, these variable speed drives are perfectly suited to sectional type drives. They allow high performance, such as maintaining torque when halted and at low speed, as well as high dynamics that combine speed and high precision. In fact, the glass plates present large weight differences due to their various dimensions and thicknesses, therefore the conveyors undergo frequent and abrupt changes in speed that can range from several meters per minute up to 75 meters per minute.
          The six other controllers are allocated to lifters, each lifter having one controller. The latter handles the centering of the plates on the conveyor and, via an Altivar 58 variable speed drive, controls the movements of the lifter. Incorporating acceleration and deceleration ramps, the variable speed drive guarantees the precise pick up and placing of the glass plates on the trestles.
          All the controllers communicate between themselves as well as with the monitoring system and optimization system, via the plant's Ethernet network. The Chantereine plant of Saint-Gobain Glass now boasts a new line with an annual production of 300,000 tons of flat glass. The cutting zone, responsible for the cutting and lifting of plates, is controlled by an automated system developed by the Italian glass industry manufacturer Bottero. Its monitoring function communicates with Schneider Electric Premium PLCs and Altivar 58 variable speed drives.

          "The flat glass manufacturing operations at our Chantereine plant depend on a single production line that encompasses all the manufacturing phases, from raw materials, furnace, float and cutting, up to warehousing and delivery. With an output of 600 tons of flat glass per day, and in order to meet growing market demand of around 8 % per year, we decided to develop new facilities. To this effect, after drafting the specifications, we entrusted the engineering to Bottero, an Italian firm specializing in turn-key cutting lines. At our request, they collaborated with Schneider Electric to define the automated system and supply the programmable logic controllers and variable speed drives", said Philippe Heringuez, Head of the Saint-Gobain Glass Chantereine plant.
          Monitoring and redundant automation
          The entire cutting zone is controlled by an automated system developed and implemented by Bottero. It comprises a monitoring system, an optimization system and programmable logic controllers linked to variable speed drives.
          The monitoring function (FIX32 by Intellution) relies on two redundant servers installed in the control station, and a dozen client stations located along the production line at the level of the cutting bridges and lifters. The monitoring function is connected to the production line control system and provides flow management, operations monitoring, defects and alarms…
          The automated system directs the path of the plates according to their dimensions and the availability of lifters.
          Eight Premium PLCs and sixty or so Altivar 58 variable speed drives, all supplied by Schneider Electric, are allocated to controlling the array of conveyors and lifters.
          Two redundant controllers (Premium warm standby) control the speed of advance of the plates along the line with a points switching system that provides access to one or other group of lifters.
          Altivar 58 variable speed drives control the speed of conveyors
          The PLCs, via a Fipio link, control a dozen Altivar 58F drives that control the conveyor motors. Using closed loop vector flow control with sensors, these variable speed drives are perfectly suited to sectional type drives. They allow high performance, such as maintaining torque when halted and at low speed, as well as high dynamics that combine speed and high precision. In fact, the glass plates present large weight differences due to their various dimensions and thicknesses, therefore the conveyors undergo frequent and abrupt changes in speed that can range from several meters per minute up to 75 meters per minute.
          The six other controllers are allocated to lifters, each lifter having one controller. The latter handles the centering of the plates on the conveyor and, via an Altivar 58 variable speed drive, controls the movements of the lifter. Incorporating acceleration and deceleration ramps, the variable speed drive guarantees the precise pick up and placing of the glass plates on the trestles.
          All the controllers communicate between themselves as well as with the monitoring system and optimization system, via the plant's Ethernet network. 

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