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43. Defining the BALL MILL Example Program

Introduction to Allen Bradley PLCs - RSLogix 500 • 2m 47s

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  • 44. Ball Mill Program Development

    When a PLC programmer starts to develop a program given a software specification, there are several steps that can be taken to ensure a successful implementation.

    First, we need to define the “I/O” that will need to be included in the program.

    From the specifications, we can see there is a Star...

  • 45. First Specification - Ball Mill S...

    Program specification number one from the previous section says:

    “The Ball Mill, Cooling Fan, and a Lubricating Oil Pump should all go on when a start button is pressed.”

    We could add the start pushbutton to each of the motor rungs, but there is a more efficient way to program this logic. We wi...

  • 46. Second Specification - Startup Timer

    The second specification indicated:

    “If the Mill has operated less than 20 seconds, the oil pump should go off when the Mill is turned off, and the fan is to run for an additional 5 seconds after the shutdown of the Mill to cool the motor.”

    It looks like we will need to add a timer that starts ...