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Automatic control system of strip slitting derived from slitting system technical renovation program, which belonged to slitting line electric factory of BaoJi petroleum steel pipe Co., LTD. In order to improve the production efficiency, reduce unit electrical failure and reduce the production cost, this topic renovated to the existing control system. This system was based on ac frequency conversion technology, and all-digital ac frequency conversion technology is applied to strip slitting control system, which realizing the ac conversion and speed governing functions, excellent speed and braking performance, high efficiency, high power factor and saving energy effect. The hardware part of this renovation system be to Siemens PLC(programmable logic controller) as the core, through the PROFIBUS and Siemens digital ac frequency conversion device connected, slitting line realized synchronous speed between the equipments . Siemens touch screen show operating condition and set the parameter from various equipment . The software part of the system adopts the Siemens software design modular program, which convenient to the system maintenance, meanwhile HMI(man machine interface)system adopts new HMI system developing platform of Siemens to configurate, good human-machine interface configuration screen displayed the running state of the equipment system, which made all the equipment operation more intuitive and convenient.The characteristic is speed stability, conveniently controlling speed, easily operate and maintenance, saving energy, improve the economic benefit of enterprise production.
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