Components of industrial automation are designed for long operation and living time. However, during the years and decades of operation some parts will not be availailable anymore on the market. Therefore some updates might be needed for control unit to qurantee availability of spare parts. Additionally to keep up with latest development, introduction of new technology requires upgrades to existing control units.

Control cabin after 2 weeks of repair work caused by lightning damages. Some parts were not available anymore or were difficult to find from the market due the fact that manufacturing of such part were stopped years ago. 

Properly made and designed heat treatment kilns are good to for usage of 30....40 year, but electric and automations component needs updates when availability of spare parts turns difficult. Together with the update of automation hardware, also the process controll sofware can be uptated to the latest technology to date.