Method for processing communication failures in master-slave system and master-slave system

Abstract

The invention provides a method for processing communication failures in a master-slave system and the master-slave system. The master-slave system comprises master device and slave device. The method comprises the following steps: detecting, by the master device, whether each slave device is online, so as to obtain state information of each slave device; sending the state information to each slave device by the master device; and determining, by each slave device, whether each slave equipment is started to be operated according to the received state information. According to the technical scheme, the slave device in the master-slave system can take the detection result of the master device as basis to determine whether the slave device is started to be operated, so that when the sending of the slave device is invalid, the slave device cannot be automatically started to be operated and then the normal work of the master-slave system can be ensured.

Description

technical field [0001] The invention relates to the technical field of master-slave systems, in particular to a method for processing communication failures in a master-slave system and a master-slave system. Background technique [0002] When the 485 bus is used for communication in the multi-connected air conditioner system, the external unit and the internal unit are master-slave communication, in which the external unit is the master, which actively sends data to the internal unit, and the internal unit is the slave, which passively receives the data sent by the external unit. data and respond. The external machine needs to know whether the internal machine is online or not, and calculates the capacity requirement (i.e., load calculation) according to the operating status of the internal machine. Therefore, reliable communication between the external machine and the internal machine is required. [0003] In the 485 communication circuit, two pins are drawn out from the ...

AI Technical Summary

Problems solved by technology

Assuming that the TX pin fails, it will appear that the device can receive data, but cannot send data

In addition, the transmission of the device may be subject to some kind of interference, resulting in the receiving party not being able to receive the transmitted data

[0004] If there is a transmission failure problem of an indoor unit in the multi-connected air conditioner system, there will be a problem that the indoor unit can detect the existence of the outdoor unit, but the outdoor unit cannot detect the internal unit, which will cause the system to work abnormally (For example, the computing capacity of the external computer is small, so it cannot be started normally)

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