Breakpoint resuming method and system
A breakpoint resume and breakpoint technology, applied in the field of industrial communication, can solve problems affecting normal work, occupying network resources, and increasing industrial network load, so as to avoid frequent switching and realize the effect of network reconnection
Inactive Publication Date: 2021-12-21
ZHEJIANG SUPCON TECH
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Problems solved by technology
As the scale of the factory continues to expand, the number of controllers is also increasing, which will lead to an increasing load on the industrial network
Some high-priority information, such as alarm information, will seize network resources and cause the file transfer of the controller to be interrupted, but the network can be restored quickly. The existing method will cause the controller to switch states frequently, affecting normal work
Method used
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[0041] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described below are only used to explain related inventions, rather than to limit the invention. In addition, it should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other; for the convenience of description, only the parts related to the invention are shown in the drawings.
[0042] Such as figure 1 As shown, this embodiment discloses a breakpoint resume transmission method, including a host computer and a controller. After the host computer obtains the online controller information in the industrial network, it checks whether the controller has been marked. When the computer sends a file interruption to the...
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The invention relates to a breakpoint resume method and system, and the system comprises an upper computer and a controller. After receiving an upper computer downloading instruction, the controller adjusts the self state into a domain downloading state and locks the domain downloading state; when file transmission is interrupted, the upper computer does not receive a downloading return packet of the controller, files are repeatedly sent in a plurality of periods, and in a data retransmission period, if the data transmission is not completed, the controller is marked as a breakpoint resume state, the controller quits the domain downloading state and is unlocked, and an index and offset of file interruption are recorded at the same time. According to the method disclosed by the invention, when the network is unstable, the file cannot be transmitted successfully, data retransmission is triggered preferentially, network reconnection is tried, and the network can recover reconnection in a short time, network reconnection can be realized quickly, file transmission is completed, and frequent switching of the controller state caused by network fluctuation is avoided.
Description
technical field [0001] The application belongs to the technical field of industrial communication, and in particular relates to a method and system for resuming transmission from breakpoints. Background technique [0002] With the development of industry, the application of distributed control system in production continues to increase. In order to ensure stable control of the field controller, the host computer needs to transmit various files to the field controller, such as configuration files, controller upgrade update files, etc. . During the process of transferring files from the upper computer to the controller, the controller needs to be adjusted to the domain download state. During the file transfer and download process, the controller cannot work normally. [0003] At present, in some industries such as oil and gas, it is often encountered that the file transmission between the upper computer and the controller crosses the public network. The network situation is c...
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IPC IPC(8): H04L29/08H04L1/18
CPCH04L67/06H04L67/1085H04L1/1803
Inventor 柏立悦金福坤闫迪徐大财张胜
Owner ZHEJIANG SUPCON TECH