Was an exercise in humility.
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In this case I deliberately chose OTL/OTU because of how it would behave over a program-to-run mode transition. This is not controlling hardware, where OTL/OTU are fraught with danger, this is remembering the state of equipment, and in the event of a power failure or other interruption causing a system reset, that state would generally still exist. The same batch is still on the scale, and we should treat it as such.
If I used a coil, the state would be lost and the system could report incorrect data. e.g. in the case that the weight had peaked at 10,000lb and was then on it's way back down, reading 5,000lb when the interruption occurs. With the latch in place, the system will "remember" that a batch is on the scale, and when the weight drops further to 250lb, will record it as 10,000lb. If I had used a coil, the state would have been lost and the batch weight would not be recorded at all.
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