PLC Solutions
Working Principle, Programming, & Software
A PLC company like us (AAXIS NANO) specializes in automation solutions using Programmable Logic Controllers (PLC full form), which are industrial digital computers designed for controlling manufacturing and electrical processes. The PLC working principle involves scanning inputs, executing control logic, and updating outputs in a continuous loop. Understanding the basic concept of PLC is essential for designing reliable, real-time systems that enhance productivity. As a critical component throughout the product life cycle—from development to optimization—PLCs enable smart, scalable, and efficient control in industries ranging from manufacturing to infrastructure. Mastery of PLC programming, integration with PLC electrical systems.
What is PLC? Understanding the Full Form and Basic Concept
PLC Full Form
The full form of PLC is Programmable Logic Controller. It is an industrial-grade digital computer designed to control manufacturing processes, like assembly lines, robotic devices, or any activity requiring high-reliability automation and process control.
What is the Basic Concept of PLC?
The basic concept of PLC revolves around automation. PLCs continuously monitor inputs, make decisions based on a custom program, and trigger outputs to automate tasks.
Core Elements of a PLC:
- Input Module: Sensors, switches, and meters send signals.
- CPU (Processor): Executes logic and control instructions.
- Memory: Stores user program and data.
- Output Module: Relays, motors, solenoids, alarms, etc.
- Power Supply: Feeds the system (24VDC or 230VAC usually).
How Does a PLC Work? – PLC Working Principle
Working Principle of a PLC
A PLC works in a loop-based architecture:
- Scan Inputs: Gathers data from input devices.
- Execute Logic: Runs the control program (ladder logic, FBD, etc.).
- Update Outputs: Sends signals to actuators or machines.
- Repeat Continuously: This scan cycle happens rapidly (in milliseconds).
PLCs offer deterministic execution—meaning they work with real-time responsiveness and accuracy, making them ideal for critical control systems.
PLC Electrical Systems and Applications
What is PLC Electrical?
PLC electrical refers to the integration of PLCs in electrical control systems for automation. It includes:
- Wiring of input/output modules
- Control panel design
- Relay logic replacement
- Motor and drive control
Where Are PLC Electrical Systems Used?
- Industrial automation
- HVAC systems
- Water treatment plants
- Smart factories (Industry 4.0)
- Building management systems
With PLCs, manual electrical controls are replaced with intelligent digital control systems.
PLC Software: Tools that Make Programming Easy
Popular PLC Software
The software environment allows you to program, monitor, and debug PLCs.
| Brand | PLC Software | Use Case |
|---|---|---|
| Siemens | TIA Portal | Advanced automation projects |
| Allen Bradley | RSLogix 5000 | Industrial systems, manufacturing |
| Omron | CX-Programmer | Factory automation |
| Schneider | EcoStruxure Machine Expert | Energy, motion & automation |
Functions of PLC Software:
- Write Logic
- Simulate Programs
- Monitor Real-Time Operations
- Upload/Download Projects
Most tools support IEC 61131-3 standard languages like:
- Ladder Logic (LD)
- Function Block Diagram (FBD)
- Structured Text (ST)
PLC Programming: From Logic to Control
What is PLC Programming?
PLC programming involves creating a set of instructions that tells the PLC how to behave under different conditions.
PLC Programming Languages:
- Ladder Logic (LD): Visual and electrical circuit-like
- Function Block Diagram (FBD): Modular blocks
- Structured Text (ST): Similar to high-level languages like C
PLC Siemens: Industry Standard in Automation
Why Siemens PLC?
PLC Siemens is a market leader for reliability and innovation. Their SIMATIC PLCs are known for:
- High-speed processing
- Scalable solutions
- Integrated HMI/SCADA
- Long life cycle and global support
Popular Siemens PLC Models:
S7-1200: Compact and cost-effective
SIMATIC-S7-1200-CPU-1212C
S7-1500: High-end performance
SIMATIC-S7-1500
LOGO! 8: Smart relay for small applications
LOGO! 8 Basic Module
Applications:
- Smart factories
- Material handling
- Packaging automation
- Renewable energy
Product Life Cycle (PLC) in Industrial Systems
What is Product Life Cycle in PLC?
In automation, the product life cycle (PLC) isn’t just marketing—it includes:
- Introduction: System design, PLC selection
- Growth: Process expansion, new features
- Maturity: Stable and optimized control
- Decline: Planning for upgrades
PLCs play a crucial role throughout these stages, helping manufacturers adapt to changing needs and extend system longevity.
We Offer Complete PLC Solutions for All Your Needs
At our AAXIS NANO, we provide end-to-end solutions covering:
✔️ Consulting & System Design
Tailored automation architecture based on your industry and need.
✔️ PLC Programming Services
Custom logic development using Siemens, Allen Bradley, Omron, and more.
✔️ Electrical Control Panels
Design and build of PLC-based panels, relay logic upgrades, and commissioning.
Let’s Automate Your Success
From “what is PLC and its working principle” to real-world implementations—we handle it all. Whether you’re a student, engineer, or business owner—we’ve got a PLC solution for you.
👉 Contact us today to get a free consultation.
