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More output with integrated drive controls - DNAdrive

More output with integrated drive controls - DNAdrive
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More output with integrated drive controls - DNAdrive - 1

More output with integrated drive controls UPM, Nordland Paper, SCA Packaging New Hythe and M-real Tako Board have recently replaced drive control systems at their mills with metso DNA drive controls. The objective is to improve operator interface and runnability, and make engineering and maintenance more effective. onventionally, sectional drive control systems have been separate from the process control system. Under previous “single window” concepts, systems were integrated only on the operator interface level. This leads to a significant redundancy of hardware requiring complicated data links between systems and the use of separate engineering tools. In addition, data collection from a separate drive control system to the process control system through complicated single window links is not adequate for today’s fast processes. These problems are compounded by the task of operating and maintaining separate systems with differing life cycles, technologies, engineering and operating philosophies. The single platform solution Single drives such as frequency converters for pumps and fans have always been controlled directly from the process control system – earlier using analog signals and today using a fast field bus like Profibus DP. Metso Automation can provide a complete system, metsoDNA, to control paper and board machine functions, including process controls (DCS), machine controls (MCS), quality control (QCS) and the sectional drive controls. Different types of sectional drives can be connected to the system. Older DC or AC drives can be connected with an analog or serial interface and newer drives using a fast field bus. In rebuild projects, a mixture of interfaces to various generations of drives can be easily accomplished. Profibus DP is a standard, high-speed interface which is available from all major drive suppliers. Even drives of different brands can be connected on the same bus. Operators are presented with a familiar and consistent interface through which they can perform all drive control and process control functions. cal operator panels, it is possible to operate and analyze all DCS, MCS, QCS and drive control functions. With the separate drive control system, drive panels are only used for drive functions. With the latest features, the operator interface is fast and intuitive. Unexpected process interruptions are quickly diagnosed and corrected. Operators have instant access to diagnostics windows, showing interlocks, drive faults and alarms associated with each drive section to quickly identify the original cause of a process halt. Function descriptions of each drive in addition to DCS and MCS loops can be shown on the operator display to help operators and maintenance personnel to understand the control functions and to analyze problems. Using the same hardware, engineering tools and operator interface simplifies training, which ensures efficient operation. Operators can even document operating experiences directly on the operator station and share their knowledge with other operators as well as the management. Highly efficient Totally integrated Operator interface functions, drive controls, drive system diagnostics and alarms are executed by metsoACN process control stations. ENERGY AND PROCESS By Pekka Höyssä and Nigel Farrand The “Integrated Drive Control” application provides all machine related functions required for drive controls. Drive logic includes for example: stop, crawl, run, slow run, jog, interlocks, group controls and start alarm functions. The drive application provides speed, torque and load share setpoints with a selection of speed or torque control depending on requirements. The tension control application provides speed or torque setpoints to the drives to maintain web tension. From lo- Common data collection from the DCS, MCS, QCS and drives enables a system to collect fast data and show signals in the same freely configurable trend display. Engineering configuration is streamlined with a single, name-based configuration language and uniform documentation. Hardware redundancy is eliminated, and a single set of spare parts covers the complete system. These advantages, plus the engineering efficiencies, result in long-term maintenance savings. There are no separate data links between sep-

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More output with integrated drive controls - DNAdrive - 2

arate systems and no more black boxes. Operation, drive controls as well as other process control functions, engineering configuration and operator interface activities are all distributed on a common platform. Operator interface functions, drive controls, drive system diagnostics and alarms are executed by metsoACN process control stations. The “Integrated Drive Control” application provides all machine-related functions required for drive controls. More and more paper mills are now adopting this approach to improve operator interface and runnability, and make engineering and maintenance...

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