CANopen protocol-based extended alarm control device and method

The invention discloses a CANopen protocol-based extended alarm control device and method. The CANopen protocol-based extended alarm control device comprises a microprocessor, an on-off input module, a turn button switch module, a downloading circuit module, a press key module, an SD data storage module, a CAN transceiver PCA82C250, an audible-visual alarm device, a display module and a power supply module, wherein the on-off input module, the turn button switch module, the downloading circuit module, the press key module, the SD data storage module, the CAN transceiver PCA82C250, the audible-visual alarm device, the display module and the power supply module are connected with the microprocessor; the CAN transceiver PCA82C250 communicates with the outside via a CANopen protocol, and a chip of the microprocessor is an STM32F103VBT6. According to the control method, CANopen protocol-based rapid communication is performed via the CAN transceiver PCA82C250 of master and slave nodes, alarms can be given out after