
Here's a detailed breakdown of Delta PLC (Programmable Logic Controller) systems — their types, architecture, features, applications, and programming environment. Delta PLCs are widely used in industrial automation for controlling machinery and processes.
🏭 Introduction to Delta PLC
Delta Electronics, a Taiwanese company, is a major global supplier of industrial automation equipment. Their PLC range is designed to offer flexible, scalable, and reliable control solutions for industrial machinery, factory automation, and process control.
Brand Reputation: Known for cost-effective, compact, and highly integrated PLC systems.
Main PLC Series: DVP Series, AH Series (Modular PLCs), AS Series.
⚙️ Types of Delta PLCs
1. DVP Series (Compact PLCs)
Best for: Small to medium applications
Variants:
DVP-SS2: Entry-level, simple logic operations.
DVP-SA2: Analog and digital I/O with PID support.
DVP-SX2: Includes analog I/O, high-speed counters, and PWM.
DVP-SE: Built-in Ethernet, supports Modbus TCP/IP.
DVP-EH3/EH2: High-speed and advanced control applications.
2. AS Series
Mid-range PLC for more complex applications.
Features:
32-bit SoC CPU for fast execution.
Built-in Ethernet, Modbus, CANopen.
Supports up to 1024 I/O points.
Compatible with Delta ASDA servo systems.
3. AH Series (Modular & High-End)
High-performance PLC for large-scale systems.
Modular architecture: CPU, I/O, communication modules can be mixed and matched.
Support for IEC 61131-3 standard programming.
Multiple CPUs, Hot-swap support, and redundancy options.
Compatible with high-speed networks like EtherCAT, PROFIBUS, and EtherNet/IP.
🔧 Core Features of Delta PLC
Feature Description
🔌 I/O Flexibility Digital, analog, temperature, pulse, encoder, and high-speed I/O modules.
⚙️ Real-Time Control Fast execution time (e.g., AS Series: 40 ns per basic instruction).
🔄 Communication Protocols Modbus RTU/TCP, CANopen, Profibus, EtherNet/IP, EtherCAT, OPC UA.
🧠 Built-in PID Function Available in SX2, EH, and AH series for process control.
📱 Remote Monitoring Compatible with Delta's SCADA (e.g., DIAView) and mobile apps.
🔒 Password Protection Offers multiple levels of access control.
📈 High-speed Counters Up to 200 kHz for motion control and pulse train outputs.
🧱 Delta PLC Architecture
A typical system includes:
CPU Module: The brain of the PLC.
Power Supply: Converts input power to levels needed for the CPU and modules.
I/O Modules: Interface to field devices (sensors, actuators).
Communication Modules: Connects PLC to HMI, SCADA, and other networks.
Programming Cable: USB or RS-232/RS-485 for software upload/download.
💻 Programming Environment: WPLSoft & ISPSoft
1. WPLSoft
For DVP series.
Ladder Logic programming.
Simple and intuitive interface.
Online simulation and monitoring.
2. ISPSoft
For AS and AH series.
Supports multiple programming languages:
LD (Ladder Diagram)
FBD (Function Block Diagram)
ST (Structured Text)
More advanced, with data logging and motion control functions.
📦 Common Delta PLC Modules
Module Type Example Models Description
Digital I/O DVP16SP11R, DVP32XP200R Input/output control for switches, relays
Analog I/O DVP04AD-S, DVP04DA-S For process values like temp, pressure
Temperature DVP04PT-S, DVP04TC-S Thermocouple and RTD inputs
High-Speed DVP32EH00M3 For fast counter and pulse output tasks
Communication DVPEN01-SL, DVPCOPM-SL Ethernet, CANopen, Profibus support
🔗 Networking and Communication
Delta PLCs are known for versatile communication options, supporting:
Modbus RTU / TCP/IP
EtherNet/IP
CANopen
Profibus DP
RS-232/RS-485
EtherCAT (AH Series)
This allows integration with third-party devices, HMI (e.g., Delta DOP series), SCADA systems, and cloud platforms.
🧰 Typical Applications of Delta PLCs
Industry Applications
🏭 Manufacturing Conveyor systems, assembly lines, robotics
🚗 Automotive Paint shops, part handling, testing equipment
🍪 Food & Beverage Batch processing, packaging, filling machines
🏗️ Infrastructure Elevator control, HVAC, water treatment plants
🧪 Pharmaceuticals Cleanroom automation, dosage control
🎡 Amusement Rides Motion control, safety interlocks
🧪 Diagnostics and Troubleshooting
Onboard LEDs: Indicate module status, input/output activity, and faults.
Software Tools: Allow:
Online debugging.
Real-time monitoring.
Data logging and alarms.
Error codes and status registers: Help in troubleshooting.
✅ Advantages of Delta PLC
Affordable and reliable.
Compact designs with strong performance.
Modular expandability (especially AS and AH series).
Robust support for industrial networks.
Rich motion control features with Delta Servo integration.
Keywords
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