HMI controller redundancy switching control method

Abstract

The invention provides an HMI controller redundancy switching control method. Two controllers redundant to each other are provided, each HMI controller has two ports redundant to each other, the HMI controllers send state frame commands to the ports and receive returned frames of the ports, and according to whether the returned frames are accurately received, return values of the returned frames and port numbers, whether to carry out redundancy switching is judged; in addition, an upper computer is enabled to accurately determine master-slave relations with the communication HMI controllers, the continuous and stable operation of the whole DCS system is effectively ensured, and the monitoring and controlling are enabled to be realized accurately.

Description

technical field [0001] The present invention relates to a control method, in particular to an HMI controller redundancy switching control method. Background technique [0002] HMI is the English abbreviation of human-machine interface or human-machine interface. HMI is the medium for interaction and information exchange between the system and users. HMI plays an extremely important role in the DCS system (distributed control system). The controller can obtain the operating data of equipment such as PLC (programmable logic controller), frequency converter or DC speed controller, and display it on the interface, and the upper computer of HMI can also send data to PLC, frequency converter or DC speed controller through the HMI controller. Subordinate devices such as speed controllers issue control commands to realize monitoring and control; in the prior art, in order to ensure the normal communication between the HMI controller and the host computer, HMI redundant controllers a...

AI Technical Summary

Problems solved by technology

[0002] HMI is the English abbreviation of human-machine interface or human-machine interface. HMI is the medium for interaction and information exchange between the system and users. HMI plays an extremely important role in the DCS system (distributed control system). The controller can obtain the operating data of equipment such as PLC (programmable logic controller), frequency converter or DC speed controller, and display it on the interface, and the upper computer of HMI can also send data to PLC, frequency converter or DC speed controller through the HMI controller. Subordinate devices such as speed controllers issue control commands to realize monitoring and control; in the prior art, in order to ensure the normal communication between the HMI controller and the host computer, HMI redundant controllers are usually set up, but in the actual operation process, a On the one hand, the upper computer cannot accurately determine whether the currently running main controller is consistent with the set main controller, so that the communication quality of the entire system cannot be guaranteed, which affects the correct implementation of the monitoring and control of the DSC system

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