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Gregory K. McMillan
Gregory K. McMillan retired as a Senior Fellow from Solutia Inc in 2002 and as a senior principal software engineer from Emerson Process Systems and Solutions Simulation R&D in 2023. Greg is an ISA Fellow and the author of more than 200 articles and papers, 100 Q&A posts, 80 blogs, 200 columns, and 20 books. He was one of the first inductees into the Control Process Automation Hall of Fame in 2001, and he received the ISA Lifetime Achievement Award in 2010, the ISA Mentor Award in 2020, and the ISA Standards Achievement Award in 2023.
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How to Check out DCS I/O at the Panel Shop
An I/O checkout on a DCS system is rather difficult because there is no means to “force” the I/O as you can most PLCsBy: Gregory K. McMillan04 May, 2012 | 4 minutes -
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Is a VFD or Valve Faster?
Is a VFD or Valve Faster?By: Gregory K. McMillan27 April, 2012 | 2 minutes -
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What Are the Factors that Affect VFD Rangeability?
What are the factors that affect VFD rangeability?By: Gregory K. McMillan20 April, 2012 | 2 minutes -
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How to Create a P&ID
P&IDs should generally follow ISA symbols for the basic instruments. If you follow that symbology, most anyone can read and understand the P&IDs quickly.By: Gregory K. McMillan14 April, 2012 | 5 minutes -
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What Are the Important Criteria for Selecting a System Integrator for an Industrial Project?
Choosing an integrator for an industrial automation project is like choosing an architect for the house of your dreams – you can get almost any architect to build a dwelling structure, but the house oBy: Gregory K. McMillan06 April, 2012 | 6 minutes -
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How to Select a System Integrator for an Industrial Automation Project
Look for an industrial systems integrator that can add value…not one that just does what you tell them. A good integrator will ask lots of questions so they fully understand your process.By: Gregory K. McMillan30 March, 2012 | 5 minutes -
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Annubar or Orifice Flowmeter: What Is the Best Application for an Oil Storage Tank?
The permanent pressure loss is less for an annubar than an orifice flowmeter.By: Gregory K. McMillan23 March, 2012 | 3 minutes -
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What Is the Proper Back Pressure Control Valve Type?
To minimize interaction between a back pressure loop and a flow loop in series, the pressure drop should be much greater across the flow control valve.By: Gregory K. McMillan16 March, 2012 | 6 minutes -
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What Are Best Practices for Sizing a Pump Recycle Valve?
Recycle valves are used to maintain limited flow through a pump to avoid cavitation under dead-head or low flow conditions.By: Gregory K. McMillan09 March, 2012 | 7 minutes -
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How Do You Handle Manual Operations in Industrial Process Control?
With a requirement for manual action, slow down transitions in manual operations by use of velocity limits on the setpoints of PID and analog output blocks.By: Gregory K. McMillan03 March, 2012 | 3 minutes
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