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Hello and welcome to our tech tutorial channel. Today we're diving into a fascinating topic for
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all you automation enthusiasts out there. A PLC programming example focusing on delaying the start
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of seven motors. Whether you're a beginner or have some experience under your belt, this video aims
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to enhance your understanding of PLC programming using a practical and straightforward solution
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So let's get started. Imagine you have seven motors and you need to program them so that
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when one starts, any subsequent motors will only start after a five-second delay
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maintaining the sequence in which they were activated. Sounds challenging, right? Well
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thanks to a solution by Peter Steinhoff, we have a clear and effective approach to tackle this
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using Do-more designer software. First, let's define our task. We have seven motors, each
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connected to a switch. The goal is to ensure that after the first motor starts immediately upon
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activation, any additional motors will only start after a five-second delay, preserving the order of
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activation. Our inputs will be the switches for each motor, all normally open. The outputs naturally
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are the motors themselves. The key here is ensuring a five-second delay between each motor starting
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following the sequence they were turned on. Peter's solution involves using one timer for each motor
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labeled as on delay in, on delay off, and so on, plus an additional down counter timer
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This down counter doesn't control anything directly, but keeps track of the time between
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motor starts. Let's say you want to start motor four. You would take the current value of the
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down counter, assign it to on delay four, and then add five seconds to the down counter
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If motor four is the first, it starts immediately since the down counter is at zero
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If another motor is started shortly after, its delay is set based on the down counter's current
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value, ensuring a five-second gap. By mapping this out in a spreadsheet, you can visualize the timing
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and sequence. This method is not only simple, but also scalable, allowing for more motors to be added
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without complicating the logic. Plus, it ensures motors start in the order activated by the operator
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After developing the PLC program, testing is crucial, either through a simulator or on actual
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machinery. This ensures the program runs as expected and allows for any necessary adjustments
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To summarize, by using individual timers for each motor and a down counter, we can effectively delay
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the start of each motor by five seconds, maintaining the sequence of activation
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This solution is not only efficient, but also adaptable for different scenarios and additional
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motors. And that wraps up our tutorial on delaying the start of seven motors using PLC
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programming. We hope this video has provided you with valuable insights and a clear understanding
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of how to approach similar automation challenges. If you have any questions or need further
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information, feel free to reach out. Thank you for watching and see you in the next video
