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Old Li Talks Technology: PLC Programming Insights for Quick Mastery by Beginners
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The Lesson from an Emergency Repair
Last month, the injection molding workshop managed by Xiao Wang suddenly stopped production. I received a call and rushed over to find the entire production line paralyzed. The factory manager was stomping his feet in frustration, and Xiao Wang was sweating profusely. After checking for a long time, it turned out that a small error in the PLC program caused the temperature control system to misjudge, directly triggering an emergency shutdown.
“Xiao Wang, your PLC program is too messy; even I, an old electrician, can’t understand it.” I shook my head while checking the program, “If you had programmed according to the standard method, you could have found the problem in ten minutes instead of wasting half a day!”
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Why Use Standard Methods for PLC Programming?
Having worked in factories for over a decade, I’ve seen too many self-righteous programming styles. Some programmers write code like a martial arts novel, with logic jumping around, making it incomprehensible even to themselves after a couple of months; others write it like a cryptic script that no one else can understand.
Think about it: factory equipment always has personnel changes. If only one person understands the program, when that person leaves, the next one will be completely lost.
Therefore, standardized PLC programming methods are key to improving work efficiency. Just like traffic rules in a city, everyone must follow them to avoid chaos.
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What is a