1. Tutorial Pemrograman Sekuensial pada PLC

Summary

In this session, Eko Aris from the Mechatronics Engineering Technology Study Program at Sanatadarma University, Yogyakarta, explores key competencies for mastering PLC programming, with a focus on creating sequential programs. The video emphasizes the importance of mastering one type of PLC to make it easier to switch between others later. Eko explains the process of creating PLC programs, highlighting the need for logic-based sequential diagrams and demonstrating their real-world applications. He covers logical operations like AND, OR, and NOT, and discusses how to translate these into a PLC program, using practical examples like button presses and light controls. The session also covers important concepts such as locking circuits and timers, all aimed at enhancing understanding and competency in PLC programming for industrial applications.

Takeaways

• 😀 Focus on mastering one type of PLC before moving on to others for easier learning and better proficiency.
• 😀 Sequential programming is crucial in PLC programming, especially in manufacturing, where machine movements are sequential.
• 😀 Logic (AND, OR, NOT, etc.) is fundamental for creating conditions in sequential movements and is essential for PLC programming.
• 😀 A sequential diagram helps in visualizing machine movements and translating them into PLC programs.
• 😀 Understanding and applying sequential diagrams to real-world cases is a key competency for PLC programming.
• 😀 Timing is important in sequential programming, with the use of timers (e.g., 5 seconds, 10 seconds) to control sequence transitions.
• 😀 PLC programming principles can be applied across different PLC brands, as the fundamental logic remains the same.
• 😀 Internal relays, such as W0.00, are often used in PLC programs to manage sequential logic, and they can be activated and reset in a controlled manner.
• 😀 Locking (or latching) circuits prevent continuous pressing of buttons and help maintain control in sequential operations.
• 😀 The case study example of button presses and lamp activation is a simple yet effective way to demonstrate sequential programming with PLCs.
• 😀 It’s important to learn the basics of creating input/output circuits for PLC programs, as incorrect circuits can prevent the program from working correctly.

Q & A

What is the main focus of the presentation?

The main focus is on teaching how to create a PLC program that can be applied across all types of PLCs, emphasizing sequential programming and logical conditions.

Why is it important to focus on one PLC type when learning PLC programming?

Focusing on one PLC type helps in mastering the core concepts in-depth, making it easier to switch to other PLC types later, as the basic principles remain the same.

What role does sequential movement play in industrial PLC programming?

In industry, PLCs control sequential movements, meaning processes occur in a specific order. Mastering sequential programming is crucial for effective automation in manufacturing.

What does the term 'Logic and Sequential' refer to in PLC programming?

The term 'Logic and Sequential' refers to the combination of logical conditions (such as AND, OR, NOT) and sequential programming to control movements and processes in PLC-controlled systems.

How does logic play a role in creating a sequential diagram for PLC programming?

Logic determines the conditions under which inputs trigger outputs. In a sequential diagram, logic functions like AND, OR, and NOR control the flow of actions, ensuring the system behaves as expected.

Can the concepts of sequential programming and logic be applied to older relay-based systems?

Yes, the basic principles of sequential programming and logic can be applied to older relay-based systems, as these concepts were used before PLCs became widely available.

What is the purpose of a sequential diagram in PLC programming?

A sequential diagram is used to translate a real-world process into a structured flow, helping to map out how inputs and outputs interact in a step-by-step sequence.

How does the concept of 'locking' in PLC programming help manage input conditions?

'Locking' is used to prevent continuous input activation, ensuring that certain conditions remain active until specific sequences are completed. This is crucial for maintaining control over the process flow.

What happens in the case study when button 1 and button 2 are pressed simultaneously?

When button 1 and button 2 are pressed, they activate output w00, turning on Lamp 1. Additionally, it starts a timer to trigger the next sequential actions, like turning on Lamp 2 after 5 seconds.

What are the key steps in translating a sequential diagram into a PLC program?

The key steps include identifying inputs and outputs, understanding logic conditions, and using timers for delays. The program is then constructed based on these sequential actions, from turning on lights to resetting the system.