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Posts Tagged ‘programmable logic controller’

Migrating Legacy PLC-5s to DeltaV

Posted in Modernization on Thursday, October 31st, 2019. No comments yet
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Way back in the mid-1980’s, when I was a newly-minted engineer working oil & gas production projects offshore in the Gulf of Mexico, a new series of PLCs came on the scene to replace the Allen-Bradley PLC-2’s we had been using. They were the PLC-5 series. Now, more than 30 years old, the CPUs used […]

Roots of PLCs and DCSs

Posted in Education, Technologies on Tuesday, January 15th, 2013. 3 comments so far
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Many of us have been around process automation for decades. We also have new folks joining our ranks every day. It’s for the new members of the global process automation community that I share a presentation given by Emerson’s Gordon Lawther at the ChemInnovations conference last fall. The presentation, The Evolution of PLCs and DCSs, […]

Control Architecture for Solar Photovoltaic Plants

Posted in Energy, Technologies on Friday, January 20th, 2012. One comment so far
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In today’s guest post, Emerson’s Jim Cushman, a member of the Power & Water Solutions business, looks at the process control architecture requirements for solar photovoltaic-based power generation. Early developers of solar photovoltaic (PV) did not consider the need to control the power generated from solar PV panels. In their minds, it was simply a […]