A general printing method for substation devices based on middleware

Abstract

The invention discloses a transformer substation device universal printing method based on middleware. A transformer substation device comprises an application layer, the middleware and a physical layer. The middleware comprises an abstraction layer module and a transport layer module which are in communication with the application layer and the physical layer respectively. The application layer transmits the printing specification and data to the abstraction layer module, the abstraction layer module selects data structures based on classes and according to printing requirements to form printing data blocks, and the printing data blocks are included in a printing queue of the middleware to wait to be sequentially processed by the transport layer module according to a first-in first-out principle; the transport layer module obtains the data block waiting for the longest time in the printing queue of the middleware to analyze the data block, a corresponding driving module is selected for conducting protocol processing on data content according to the interface type of a printed object, and the data content is transported to the physical layer through an I / O equipment interface. By means of the method, data output of the transformer substation device on printers of different interface types can be achieved, and the flexibility and configurability of the device are greatly improved.

Description

technical field [0001] The invention relates to a general printing method, in particular to a device printing method in a substation. Background technique [0002] In the field of industrial control and power system control, the printing function of the device is an important human-computer interaction method. In various application stages such as commissioning, operation and maintenance of field devices, there is a data requirement to obtain historical records and real-time status through the printing interface. [0003] At present, the mainstream printing method of substation devices is still based on serial port printing, that is, each device or each screen cabinet is equipped with a dot matrix printer, and the device transmits data information to the printer through the RS232 serial port, but serial port printing has high configuration costs and printing problems. low speed problem. Chinese patent application number 201220119850.X proposes a centralized network printin...

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Problems solved by technology

[0003] At present, the mainstream printing method of substation devices is still based on serial port printing, that is, each device or each screen cabinet is equipped with a dot matrix printer, and the device transmits data information to the printer through the RS232 serial port, but serial port printing has high configuration costs and printing problems. low speed problem

Chinese patent application number 201220119850.X proposes a centralized network printing system based on Ethernet. This method needs to set up a server and install a printing service component at the station control layer. Since the server transfer link is added between the substation device and the printer, The transmission efficiency and stability of device printing are easily affected

On the other hand, the devices in the substation are generally embedded platforms with relatively limited performance and resources. Since they cannot support the installation of various printer drivers like desktop computers, the conventional printing mode of general embedded devices is difficult to flexibly adapt to different printing interfaces. type, and the improvement of printing performance also encountered a bottleneck

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