Best Way To Understand What Simulating PLC Logic Means

Simulating PLC Logic Means

We can all agree that it is difficult to understand what PLC or Programmable Logic Controller means. As the brief definition, it is computer specifically perfect for industrial automation. They can easily automate machine function, any specific process, and even complete production line.

The idea is to understand that RSLogix 5000 emulator receive information from various input devices and connected sensors. They process the data and trigger outputs based on preferable parameters.

Of course, everything varies based on the outputs and inputs, but you will be able to record and monitor runtime data such as operating temperature, machine productivity, as well as starting and stopping processes, and many more. The best thing about them is the robust and flexible control solution that is completely adaptable to any application you can think.

A few important features make PLC unique when compared with microcontrollers, industrial computers, and other control solutions:

  • CPU – The brain of PLC is the central processing unit (CPU). It can be 16 or 32-bit processor that includes a memory chip and integrated circuits so that you can control logic, communicating and monitoring. The processor directs it the direct control instructions, as well as carrying arithmetic and logic operations, communicating with other devices and performing internal diagnostics.
  • Input/output – All PLCs feature input and output models that will connect it to the entire machine. Even though CPU can process and store the program data, the input and output modules, provide information to the CPU, which will trigger a certain result. There are various choices such as digital or analog input/output models. Output devices can include lights, relays, drives, and valves, while input devices have switches, sensors, and You will be able to match and mix input/output to find the best configuration that will give you proper information.
  • Communication – Apart from the idea that you will get output and input devices within the PLC, it can easily connect to other systems. It features a wide range of communication protocols and ports that will ensure the specific and proper communication with other systems. For example, you will be able to use the application data made by PLC and control it by using SCADA (supervisory control and data acquisition) system.
  • Human Machine Interface – HMI or Human Machine Interface is the feature that allows PLC to interact in real time. It includes a simple display, keypad, and text-readout. You can also purchase the high-end models that feature touch screen panels. It will provide you the possibility to input and review information from PLC in real time. For more information on HMI click here.

Why Should You Use PLC?

Why Should You Use PLC

The first and main reason why industries use PLCs apart from their functionality is the robust construction that can easily withstand harsh conditions such as cold, heat, extreme moisture and dust. It is simple to understand and use it, and you will be able to learn how to program promptly.

They are modular, which means that you can plug them in various setups. It features relays that switch under load, and that will cause arcing between contacts. Soon afterward, arcing will generate high temperature that will weld contacts shut and create a degradation of the contacts, which will result in device failure.

How To Program PLC?

In most cases, people will write the PLC on the computer and transfer it to the controllers. You will be able to program in different languages such as Ladder Logic or C. If you haven’t known, the Ladder Logic is a traditional programming language that uses circuit diagrams with rungs of logic that you read from left to right.

Rung means a specific action that PLC must perform, starting with inputs and resulting in outputs. Due to appealing visual appearance, Logic is much easier to understand than other programming languages used for PLCs.

Programming Languages

You can use five programming languages in PLC according to international standard. Ladder logic is the most commonly used:

  1. Ladder Logic – It features horizontal formats from left to right that starts in the left corner and progresses to the next line; and vertical formats that start from the upper left and switches while in command.
  2. Function Block Diagram – FBD, or Function Block Diagram, is perfect to describe functions between input and output variables. It features blocks, which connect input and output. It is a great solution when you want to depict algorithms from interconnected controls systems.
  3. Structured Text – ST, or Structured Text, is language that includes sentence commands. You will be using various commands such as else/then/if or until/repeat to create programs.
  4. Instruction List – IL, or Instruction List, is language that features variables and functions that you can define by a simple You will be able to control the program by using sub-routines and jump instructions with appropriate parameters.
  5. Sequential Function Chart – SFC, or Sequential Function Chart, is a method of programming complex systems. It features basic building blocks that have their sub-routines. You can write program files by using other programming languages. Most people use it to divide complicated and large programming tasks from more manageable and smaller tasks. For more information on SFC, you just have to enter this particular website:


PLC is the most appropriate solution for industry checking when compared with other industrial PCs that cannot withstand harsh conditions. Apart from the robust constructions, you will get the real-time functionality as well as immediate action that will prove useful in various situations.

Of course, it has some disadvantages, but you will be able to learn the programming language without any additional problem. It is essential to determine what PLC means before you enter the world, and that is the reason why we created this thorough guide as the brief introduction to the entire world of PLCs.

It is an essential part of the industry, and if you are an IT student, you can find the areas that would help you enter the market and create something useful.