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41. Using Additional Common Instructions

Introduction to Allen Bradley PLCs - RSLogix 500 • 4m 25s

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  • 42. Additional Common Instructions Us...

    We will quickly show other instructions that can be used that are like those instructions we have already used.

    Timer/Counter instruction tab:
    TON: Timer On-delay
    TOF: Timer Off-delay
    RTO: Retentive Timer On-delay
    RES: Reset
    CTU: Count Up counter
    CTD: Count Down counter

    Compare instruction tab:...

  • 43. Defining the BALL MILL Example Pr...

    In this control example, a ball mill is used to grind coarse sea salt into very fine salt crystals for use in baking. A salt hopper delivers coarse salt to the ball mill and after a period of 60 seconds in the mill, very fine salt is discharged from the mill to a collection hopper.
    Since the moto...

  • 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...