The core disciplines of an industrial control system: the logic solver, the operator interface, the field devices that measure the process, and the panel that ties them together.
Browse Controls205 topics
Municipal water and wastewater is where most of this control work lands. Process context first, then the control strategy that serves it.
Browse Water & Wastewater56 topics
Organized by symptom, not by product. Start with what you can observe, work through what to check first, and narrow it down without guessing.
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Reference material for the documents a control system is designed, built, and handed over with.
Browse Engineering Library34 topics
Operational technology security for control systems, written for the people who actually maintain them.
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Step-by-step procedures for the tasks that come up on real jobs. Each one is written to be worked through with the equipment in front of you.
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Longer-form technical writing, published as it is finished and revised as field experience corrects it.
Browse Articles12 topics
Software Eric Sullivan is building on his own time. These are personal projects, not products of any employer.
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PLC & Programming
ST
A high-level, Pascal-like PLC programming language defined by IEC 61131-3, suited to math, loops, and string handling.
Most mature programs mix it with ladder: ladder for the interlocks and device control that maintenance must read online, structured text for the calculations underneath.
Have a controls question? Contact Eric Sullivan directly.
863-698-8266