MEI CNC machine output monitoring system is a set IoT Edge Data Logger Developed on microcontroller platform STM32, specialized for collecting CNC machine operating data and calculating indicators OEE (Overall Equipment Effectiveness) but No need to interfere with PLC, CNC Controller or machine control program. The device is designed according to the method Non-Intrusive Monitoring, receive magnetic signals Status indicator light (Tower Light/Stack Light) or Digital Output signals of the machine to determine operating status without affecting the existing control system.
The controller integrates digital inputs Optical isolation (Opto-Isolation) and circuit anti-EMC interference, allows receiving signals from lights Run, Cycle, Alarm, Setup, Idle or other customized states. Microcontroller STM32 Perform high-speed sampling, noise filtering (Debounce), edge detection (Edge Detection), determine the time of state transition and accurately record operating time, stop time, waiting time, error reporting time and machining cycle of each machine.
From the collected data, the device automatically calculates the indicators Availability, Performance, Quality and OEE, and also statistics output by shift, by day, number of completed cycles, machine downtime, error reporting time and actual operating time. All data is mounted Timestamp to serve historical retrieval and analysis.
Devices that support connection Wi-Fi or LoRa, transmit data to the platform MEI ECO through protocol MQTT. For factories with many distributed CNC machines, Nodes are used LoRa will transmit data to the central Gateway, then the Gateway synchronizes to the server via LAN or Wi-Fi, helping to reduce cabling costs and ensure communication coverage throughout the factory.
To meet the industrial environment, the equipment is designed with Power isolation, industrial noise protection, overvoltage and ESD protection, and integrated at the same time RTC backup battery and Flash/EEPROM memory to maintain real time and store data when power is lost or network connection is lost.
Integrated system Offline Data Logging, automatically saves all production data during connection loss and synchronized to the correct timestamp When the connection is restored, ensure no data loss for OEE calculations. The device also supports Firmware Over-The-Air (OTA), allowing remote control software updates over Wi-Fi without stopping the machine or removing the device.
Platform MEI ECO Provide real-time Dashboard, OEE, Availability, Performance, Quality charts, shift output statistics, Alarm/Event history, user authorization, Push Notification when the machine stops abnormally or an error occurs and Export Excel report, meeting the requirements of digital transformation, production management and improving operational efficiency in modern CNC factories.