Almost entirely dependent on the application. One is not better than the other, but one may be better than the other for your application. Even then, there is functionality overlap between the two. I did a LARGE project that, when first designed, was almost all discrete control. My personal preference for discrete control is Rockwell. As the project went on, a lot of analog was added. If I knew that ahead of time, I might have chosen DeltaV but the project was already about 25% coded. Rockwell handled the change in controls just fine, but DeltaV might have been a better solution (easier).I have to choose one of mentioned systems for my project (linear station of a pipeline) which has almost 400 physical I/Os. can you please help me comparing these two systems in terms of realibility, robustness, applications, performance, cost, after sales services, etc.?
by Seth Price
by Gunner Scott