PLC Programming With Ladder Logic > Implementation of Latching and Interlocking Logic

Ladder Logic of Interlock Circuit

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A characteristic that makes the status of two mechanisms or functions mutually reliant is called an interlock. It can be made up of any electrical, electronic, or mechanical components or systems, and it can be used to avoid undesirable states in a finite-state machine.

Ladder programming is a very simple type of programming that can be used to implement the concept of variable speed. This type of programming uses a sequence of steps that have an increasing and decreasing speed.
The idea is to provide a step-by-step process to perform the task at any speed, and then divide the process into smaller, less complex steps.
Ladder programs are used in various fields including motor operation, control systems, power electronics, robotics and mechanics.

Ladder programming is a method of programming the operation of a motor. The concept is to make each layer depend on the one below it. In this way, it gives the program flexibility and adaptability to changes in the operating environment. Ladder programming has its roots in control theory and industrial control systems. It can be used in automotive, marine, industrial machinery, electrical power generation plants, etc. It is also employed in commercial airplanes to fly at a constant speed without having a variable wing flap angle as an input.

Motor operation is controlled by the use of a motor's torque. The torque is generated by the speed of the current flow that passes through it.
Ladder programming is a method for introducing control in motor operation. It uses multiple levels to control its motion and generate more torque, which can be achieved by increasing speed at each level.
Ladder programming is used in various types of motors such as electric motors and induction motors, but these kinds are not the only ones that are equipped with this kind of programming. As such, this kind of programming can be applied to almost any type of motor using controllers.

2. Three up, one down - The second example is used in hoists where there are three stops on the

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Course Content

  1. Introduction to PLC Programming
    3m 49s

  1. How to do PLC Programming using Ladder Logic
    15m 14s
  2. Installation of RSLogix Micro Starter Lite
    12m
  3. Elements of RSLogix Micro Starter Lite
    15m 32s

  1. How to Programme and Run the Logic
    19m 14s
  2. PLC Programming of OR Logic Gate
    8m 24s
  3. PLC Programming of AND and NOT Logic Gate
    12m 48s
  4. PLC Programming of NAND,NOR and XOR Logic Gate
    16m 28s

  1. Ladder Logic of Push Button Latching
    14m 16s
  2. Ladder Logic of Interlock Circuit
    21m 25s
  3. Trick to Optimize Use of I-O in Ladder Logic
    5m 33s
  4. Ladder Programming of Motor Operation
    13m 58s
  5. Ladder Logic of Motor Forward Reverse Interlock Protection
    20m 35s

  1. How to Use Timer in Ladder Logic
    17m 39s
  2. On Delay Timer in Ladder Diagram
    8m 39s
  3. Off Delay Timer in Ladder Diagram
    11m 15s
  4. Retentive Timer in Ladder Diagram
    12m 11s
  5. Star to Delta Motor Starter in Ladder Logic
    28m 2s
  6. Counter-up with On Delay Timer Logic
    9m 2s
  7. Countdown with Reset Function in Ladder Logic
    12m 31s
  8. Up-Down Counter Logic with Application in Ladder Logic
    9m

  1. Comparator LIM Block in Ladder Logic
    7m 35s
  2. Comparator EQU,LES,LEQ,NEQ,GRT and GEQ Block in Ladder Logic
    19m 34s
  3. Math Operations in Logic
    30m 16s
  4. Move Blocks in Ladder Logic
    10m 3s
  5. Logical Gate Blocks in Ladder Logic
    22m 5s

  1. Decimal - BCD Conversions in Ladder Logic
    15m 41s
  2. Bit Shift Left and Right in Ladder Logic
    14m 1s
  3. Scale Parameters
    20m 41s
  4. Hacks for Ladder Logic
    10m 11s

  1. Water Tank Filling Control Logic
    27m 57s
  2. Chemical Mixing Process Logic
    33m 11s
  3. Traffic Light Signal Control Logic Part - 1
    23m 41s
  4. Traffic Light Signal Control Logic Part - 2
    36m 46s
  5. Elevator Control Logic
    01h 9m 40s

  1. Assignment of PLC Programming With Ladder Logic
    3m 16s

  1. Interview Questions
    7m 9s

  1. Career Guideline
    2m 42s
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