PLC Industrial IoT System Application Scenarios

A Programmable Logic Controller (PLC) is one of the core devices in industrial automation, serving as a key application that enables factories to operate in an automated manner. Internally, PLCs are typically composed of multiple modules designed specifically for performing logical control, sequential control, timing control, counting control, and other operations.

 For instance, by interfacing with sensors through IO ports to monitor various variable signals, PLCs can output instructions based on programmed logic to drive the operation of various actuators.

Furthermore, PLCs can exchange data with other devices through various communication protocols, enabling remote monitoring and control, as well as detecting and alerting system faults.

 In this regard, WideIoT (formerly Wutongbolian) provides data acquisition gateways that widely access PLCs, supporting protocol parsing and data collection for PLCs from manufacturers such as Siemens, Mitsubishi, Omron, Schneider, Delta, and Inovance. This ensures a comprehensive and reliable data source for data management platforms, facilitating efficient and secure operations.

1. Equipment Monitoring and Online Management
   By connecting to controller PLCs, the gateway can in real-time collect equipment operational status and process parameters, integrating them into workshop data dashboards or MES systems.

    This allows for an understanding of equipment Overall Equipment Effectiveness (OEE) and status parameters, enabling the rational arrangement of production tasks.

2. Production Counting and Quality Monitoring
   By installing sensors and collecting counting data from within the PLC, it is possible to gather data on equipment production volume, quality, and other metrics, summarizing them into data reports.

    This provides insights into daily, monthly, and annual production volumes, daily production efficiency, product pass rates, and other information.

3. Fault Alarming and Remote Maintenance
   Alarm thresholds can be set to trigger automatic alerts via WeChat, SMS, email, and other channels. Additionally, it enables remote programming and debugging of PLCs, as well as remote program uploading and downloading, effectively enhancing work efficiency and management levels.