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.
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Municipal water and wastewater is where most of this control work lands. Process context first, then the control strategy that serves it.
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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.
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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.
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Software Eric Sullivan is building on his own time. These are personal projects, not products of any employer.
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PLC & Programming
One horizontal line of ladder logic: input conditions on the left, an output on the right, read left to right.
Rungs solve top to bottom in a single pass, so a bit set on an early rung is already set when a later rung examines it, while a bit set later will not be seen until the next scan.
Have a controls question? Contact Eric Sullivan directly.
863-698-8266