COMMUNICATION SYSTEM AND COMMUNICATION METHOD THEREOF

摘要

The present invention provides a communication system. The communication system comprises an upper computer, control cabinets and peripheral equipment, wherein the control cabinet comprises a serial port used for communication between the peripheral equipment and the upper computer. A working cycle of the communication system includes a polling stage and a free communication stage, the upper computer sends query instructions to each control cabinet through the serial port of the control cabinet in the polling stage, and a control cabinet communications with the corresponding peripheral equipment through the serial port in the free communication stage. The present invention also provides a communication method using the communication system. With the communication system provided by the present invention, the reliability of communication between the control cabinets and the upper computer and communication between the control cabinets and the peripheral equipment can be guaranteed. In addition, in the communication system provided by the present invention, the number of the serial ports in the control cabinet is not increased, and therefore the increase of the physical volume and the increase of the communication system cost are avoided.