PLC Data Acquisition System Based on OPC UA Protocol

 

In industrial systems at all levels, there exist complex on-site networks, multiple buses, and communication technologies.The communication protocols of various devices are diverse, with differing parsing standards, leading to the formation of data silos.Meanwhile, the rapid growth of PC-based control systems and related visualization software applications has made it difficult for these systems to interface with complex and isolated protocol devices.Therefore, a unified standard is required to facilitate data exchange between these systems, and the OPC communication protocol effectively addresses this issue.

The WideIOT industrial intelligent gateway possesses OPC UA protocol acquisition capabilities, enabling it to connect to various PLCs, DCSs, SCADAs, industrial control instruments, and other devices.It can collect real-time operational parameters from these devices and enable internet access via 5G/4G/WiFi/Ethernet, interfacing with cloud platforms or upper computers using protocols such as Modbus, MQTT, and OPC UA.This provides monitoring, alerting, management, control, and maintenance functions for industrial production, wastewater management, energy management, and other scenarios.

Functional Characteristics

  • The gateway is equipped with multiple serial and network ports, enabling it to function as an OPC server and integrate data from front-end devices through a universal interface.This includes real-time data, alarm information, historical data, and alert events, providing remote access services to multiple clients.

  • Upper computers or cloud platforms can initiate service requests to the server and receive response data, allowing them to monitor device status, process parameters, and other information.They can also issue instructions to front-end devices for remote control operations.

  • The gateway can aggregate on-site data from the control or device layers and convert it into data conforming to OPC UA, Modbus, MQTT, and other protocol specifications, ensuring real-time communication and information exchange between different device systems.

  • It supports various edge computing functions such as intelligent acquisition, data filtering, alarm calculation, jump triggering, formula calculation, and grouping strategies, significantly reducing project R&D and construction costs.

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