A PLC data acquisition gateway is an industrial IoT device used to connect on-site PLCs (Programmable Logic Controllers) with industrial software or systems (cloud platforms or upper computers).

 It converts the output data from PLCs into digital signals through serial port or network port access, sending them to other devices for processing or storage. Simultaneously, it can also convert digital signals from other devices into signals recognizable by PLCs, enabling data exchange and transmission.

The main functions of a PLC data acquisition gateway include:

1. Data Acquisition: Capable of real-time data collection from PLC devices, such as sensor signals and switch statuses.

2. Data Transmission: Transmits the collected data over the Internet or a local area network to specified network addresses, enabling remote data transmission and sharing.

3. Data Processing: Processes, analyzes, and stores the collected data.

    For example, it can perform edge computing, as well as parsing and conversion operations, to better meet specific application requirements.

4. Remote Monitoring: Through communication interfaces with PLC devices, it enables remote monitoring capabilities.

    Users can access PLC devices over the network to view real-time operational status and data, and perform remote control and adjustments.

5. Fault Alarming: Detects faults and abnormal conditions in PLC devices through real-time monitoring of their operational status and data, and sends alarm messages to users.

   

The key characteristics of a PLC data acquisition gateway are as follows:

1. Diverse Connectivity Options: Supports various Internet access methods such as 5G/4G/WIFI/Ethernet, as well as device access via network ports, serial ports, and IO ports.

    It also features LORA wireless transmission, automatic reconnection upon disconnection, and multi-network redundancy.

2. Stable Structure: Easy to deploy, it adopts a modular design that integrates various functional modules into a compact and durable housing, suitable for harsh industrial environments.

3. Rich Protocol Parsing: Built-in with an extensive industrial protocol library, it supports parsing of mainstream and proprietary protocols, such as PLC, OPC, Modbus, etc.

4. Data Standardization and MQTT Protocol Integration: Through standardized data processing, it converts data into JSON format for seamless integration with MQTT cloud platforms, facilitating remote monitoring. It also provides API channels to support custom development.