Hot standby service redundant control method and system for container water chilling unit

Abstract

The invention discloses a hot standby service redundant control method and system for a container water chilling unit. The system comprises a main controller and a standby main controller for uniformly coordinating and controlling control systems corresponding to four air-cooled chiller units, wherein the main controller and the standby controller also respectively have control functions on a first air-cooled chiller unit and a second air-cooled chiller unit; a third controller and a fourth controller in the four sets of the control systems respectively have control functions of a third air-cooled chiller unit and a fourth air-cooled chiller units; and when the main controller is offline, or a water inlet or water outlet temperature sensor connected with the main controller is failed, the standby main controller replaces the main controller to control. Due to the adoption of the invention, the undisturbed switching between the main controller and the standby main controller can be realized, the stable operation of the whole system is ensured, and the high reliability of the whole network system is also ensured, so that the defect of high cost of the prior art is overcome.

Description

technical field [0001] The present invention relates to the field of industrial control, in particular to a dual-machine hot-standby redundant control method and system for container chillers, and a network disturbance-free switching control method for places that need to use dual-host controllers to achieve high reliability . Background technique [0002] At present, the commonly used method to achieve high reliability in network communication is dual-machine hot standby redundancy. The current market has very high requirements for controllers that realize dual-machine hot standby redundancy. In the field of industrial control, it is only equivalent to Siemens S7300 series and The above PLC can realize the dual-machine hot standby redundancy function. Since this dual-machine hot standby redundant system has high requirements on the controller, and the control equipment in the entire network must also match the hot standby redundant control system, the real redundancy of th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-machine hot standby redundant control method for container chillers and and The system is designed to solve the problem of high cost caused by the relatively high requirements on the controller and the entire network equipment in the prior art when realizing dual-machine hot standby redundancy

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