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Control System Migrations by Daniel Roessler

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1

Migration Project Justification

It is a testament to the automation vendors of the 1970s, 1980s, and 1990s that so many legacy control systems from these periods continue to operate industrial facilities today. However, many process control engineers will tell you this is both a blessing and a curse. Because these control systems continue to operate reasonably well, one of the biggest challenges controls engineers face is getting support for control system migrations. Short of failures by the control system that lead to significant downtime, the need for migration projects is often scrutinized and questioned.

When compared with capital expenditures on more tangible and easily understood return-on-investment (ROI) projects, control system ...

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