Wednesday, January 3, 2024

Modbus and OPC comparison Table

 

Modbus vs OPC

Comparison between Modbus and OPC

Feature Modbus OPC (OLE for Process Control)
Definition Communication protocol Communication protocol and data exchange standard
Protocol Type Serial and Ethernet-based Can use various protocols, including TCP/IP
Topology Master/Slave Client/Server and Publish/Subscribe
Data Types Limited data types (e.g., integers, floats) Extensive data types (e.g., integers, floats, strings)
Complexity Simple and lightweight More complex and feature-rich
Flexibility Limited flexibility in terms of data format Highly flexible, supports complex data structures
Scalability Suitable for small to medium-scale systems Suitable for small to large-scale systems
Integration Widely used in industrial automation Common in industrial automation, more versatile
Interoperability Interoperability may be limited Emphasizes interoperability, supports multiple platforms
Vendor Neutrality Generally vendor-neutral Allows for vendor-specific implementations
Security Basic security features OPC UA provides advanced security features
Standards Open standard, but various versions exist Open standard with defined specifications (OPC UA)
Popular Versions Modbus RTU, Modbus TCP OPC DA (Data Access), OPC HDA (Historical Data Access), OPC UA (Unified Architecture)
Usage Common in simple industrial systems Used in a wide range of industrial automation scenarios

This table provides a high-level overview, and the choice between Modbus and OPC depends on specific project requirements and considerations.

Difference between Active and Passive Transducer

  Feature Active Transducers Passive Transducers Power Supply Requires an external power source to operate...