Address allocation method, communication device and storage medium for serial communication equipment

Abstract

The invention discloses an address assignment method for a serial port communication device. The serial port communication device has at least two serial ports, including obtaining an address setting instruction sent by an upper-level slave device through the first serial port, and judging whether there is an address setting instruction related to the second serial port. If there is no next-level slave device connected to the second serial port, the address configuration is performed according to the address setting command sent by the upper-level slave device, and the tail device information is generated and passed through the upper-level slave device one by one. If there is a next-level slave device connected to the second serial port, the configuration address in the address setting command is modified and updated according to the preset address change value, and then sent to the next-level slave device, and the next-level The tail device information of the last-level slave device forwarded by the slave device is passed to the master device step by step through the upper-level slave device. The present invention realizes the maximum redundancy of multiple gateways, can carry out auxiliary collection at the standby gateway and switch to the main working state depending on the failure situation, increases the switching flexibility of the industrial gateway redundant system, and improves the reliability and reliability of the system Workability.

Description

technical field [0001] The invention relates to the field of industrial data communication, in particular to an address allocation method, a communication device and a storage medium for serial communication equipment. Background technique [0002] Serial port communication is a widely used single-bus data communication, which is widely used in computer serial interface and data communication between devices. Serial port communication is easy to use and fast. It is a full-duplex communication method, and data transmission and reception can be initiated between two devices at the same time. At present, the serial port communication usually adopts the RS232 standard, and the serial port communication only allows one-to-one connection, but does not allow one-to-many and many-to-many networking, so the communication address is not involved in the use of serial port communication. However, in many applications, there is one master device and multiple slave devices, and each devi...

AI Technical Summary

Problems solved by technology

However, although this prior art can realize the automatic allocation of slave device addresses and data communication, it requires that the buses of all device interfaces be connected together, and all slave devices can simultaneously receive the data sent by the master device, and the communication interfaces all include a Group bus and a group of strobe signals, so it cannot be applied to some current communication equipment occasions with only a few serial communication interfaces, and cannot solve the problem of using a master device to communicate with multiple slave devices through a single serial communication interface.

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