System control method and device

A control method and controller technology, applied in the field of communication, can solve problems such as low control accuracy, and achieve the effects of avoiding large errors, precise control, and solving low control accuracy

Active Publication Date: 2019-09-10
北京龙鼎源科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The embodiment of the present application provides a system control method and device to at least solve the problem in t

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0020] Example one

[0021] In this embodiment, a system control method running on a PLC system is provided, figure 2 Is a flowchart of a system control method according to an embodiment of the application, such as figure 2 As shown, the process includes the following steps:

[0022] Step S202, in the PLC system of the 1oo2 architecture, obtain the historical collection data value and the newly collected data value of the same signal source collected by the two channels respectively;

[0023] The execution subject of this method may be the first controller, and the first controller may be a master controller or a slave controller corresponding to the dual channels,

[0024] Step S204: For each channel, the newly collected data value and the historical collected data value are taken as a set, and the difference between the maximum value and the minimum value in the set is obtained;

[0025] Step S206: Control the PLC system according to the comparison result of whether the difference v...

Example Embodiment

[0057] Example two

[0058] In this embodiment, a system control device is also provided, and the device is used to implement the above-mentioned embodiments and preferred implementations, and those that have been explained will not be repeated. As used below, the term "module" may implement a combination of software and / or hardware with predetermined functions. Although the devices described in the following embodiments are preferably implemented by software, hardware or a combination of software and hardware is also possible and conceived.

[0059] According to another embodiment of the present application, there is also provided a system control device used in a 1oo2 PLC system, including:

[0060] The first acquisition module is used to acquire the historical acquisition data value and the newly acquired data value of the same signal source acquired by two channels respectively;

[0061] The second acquisition module is configured to use the newly collected data value and the his...

Example Embodiment

[0067] Example three

[0068] The embodiment of the present application also provides a storage medium. Optionally, in this embodiment, the foregoing storage medium may be configured to store program code for executing the following steps:

[0069] S1, in the programmable logic controller PLC system of the 1oo2 architecture, obtain the historical collection data value and the new collection data value of the same signal source by two channels respectively;

[0070] S2, for each channel, use the newly collected data value and the historical collected data value as a set, and obtain the difference between the maximum value and the minimum value in the set;

[0071] S3: Control the PLC system according to the comparison result of whether the difference value corresponding to the two channels is greater than a threshold value.

[0072] Optionally, in this embodiment, the foregoing storage medium may include, but is not limited to: U disk, read-only memory (ROM, Read-Only Memory), random ac...

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Abstract

The application provides a system control method and device. With the method, the currently collected value of one channel is compared with the previously collected historical data, and then the situation of the two channels is comprehensively considered to determine the control of the PLC system, without the comparison between the collected data of the two channels, thereby avoiding large errorsexisting when the data collected between the two channels is compared, achieving precise control, and solving the problem in the related art of low control degree of accuracy by controlling the systemby comparing the values collected by the two channels.

Description

technical field [0001] The present application relates to but not limited to the communication field, and in particular, relates to a system control method and device. Background technique [0002] In the related art, in a safety programmable logic controller (Programmable Logic Controller, PLC for short) system, each input and output I / O module under the 1oo2 architecture adopts a dual-channel design. The two channels will continue to collect data from the same signal source. The master-slave controller triggers an interrupt through the data bus to read the data of the corresponding channel of the I / O module, and then the two controllers communicate with each other to exchange their data with each other. Comparison, if the comparison result of one party considers that the data are not equal, it is considered that the control system itself has a failure, and the control system directly shuts down to prevent further failures and losses. [0003] Due to the jitter characteris...

Claims

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Application Information

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IPC IPC(8): G05B19/05
CPCG05B19/054
Inventor 杨昊佐殷涛刘志安
Owner 北京龙鼎源科技股份有限公司
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