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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
