PLCs ensure efficiency in maize flourmill, Unga Holdings Ltd.

\"UngaMaize milling involves separation of bran, germ and endosperm from the maize seed; the bran and the germ are the by products. Unga Ltd. was looking for Totally Integrated Automation (TIA) solution and contracted IET to design and implement it for them.

When setting up the automation structure for the milling plant it was necessary to integrate automation solution for three processes in the flourmill. These processes are cleaning and conditioning, milling and storage, and packaging.

Three networked S7-PLCs (two S7-300 and one S7-400) form the heart of the automation system. The three are monitored via two Siemens SIMATIC Operator Panels that provide a graphical representation and control of the mill.

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