Zodiac Hot Dip Galvanising Process Line Llanwern Works

Tata Steel Newport, Wales

the project

Modernisation of the Process MMC including Temper Mill Control and SCADA System.

the solution

This included upgrading the existing MMC with Siemens S7-400 PLC’s. Replacement of 17 new AC and DC Sinamics Drives were completed, along with re-commissioning of the remaining 67 process drives, that are now being controlled via a new profibus link through a protocol converter. Modernising of the tension control system was also incorporated into this upgrade.

A new WinCC SCADA system was installed for the temper mill, where the engineering and operator interfaces were installed.

A structured program of parallel installation and commissioning was undertaken, utilising a new IBa data-logger to optimise the changeover programme. This ensured that the original control philosophy was emulated by the new system and with advanced data monitoring, dramatically improved the overall control of the process.


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