Viterra provides a storage and handling network for the grain industry across Australia. The Cummins site provides grain storage capability on the Eyre Peninsula in South Australia. ATSys were engaged by Viterra to upgrade the aging control system at the Cummins site with a modern, supportable equivalent. ATSys underwent detailed site investigations and stakeholder engagements to ascertain the requirements of the new system. PLC and HMI programs were developed and fully witness tested in the office prior to deployment on site. ATSys were able to achieve the installation, testing and commissioning of the new system without any unscheduled down time.