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Programmable controller and control method

A technology of programming controller and control method, applied in the direction of program control, program control in sequence/logic controller, electrical program control, etc., can solve the problems of longer time and increased ratio, and achieve the effect of shortening time

Active Publication Date: 2018-09-28
PANASONIC INDAL DEVICES SUNX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the communication processing of all channels is executed in one execution unit, when the number of channels is large, the proportion of communication processing in one execution unit increases, and until one execution The time required until the end of the unit itself also becomes longer
Therefore, the time from when information is input to the programmable controller to when it is reacted to (for example, output processing of information) tends to be long

Method used

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  • Programmable controller and control method

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Experimental program
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no. 1 approach

[0031] Next, a first embodiment of a programmable controller will be described with reference to the drawings.

[0032] Such as figure 1 As shown in , the programmable controller 10 includes: a processing unit 20 that executes various processes, a storage unit 30 that stores various control programs or various information, and a communication device that executes communication between the processing unit 20 and external devices 101, 102, 103. Section 40. Furthermore, the programmable controller 10 includes a display unit 50 . Examples of the external devices 101 to 103 include personal computers, measuring devices such as temperature, barcode readers, image processing devices, display devices, sensors, and the like.

[0033] The communication unit 40 is an interface, and the communication unit 40 is provided with a plurality of (three in this embodiment) communication ports 41 , 42 , and 43 for performing information communication with the external devices 101 to 103 .

[0...

no. 2 approach

[0069] Next, according to Figure 5 A second embodiment will be described. In addition, in the following description, in the same structure and the same control as the already-described embodiment, the same code|symbol is attached|subjected, and the description is abbreviate|omitted or simplified.

[0070] In the present embodiment, the processing unit 20 sets an upper limit to the execution time of the communication processing in one scan processing. Moreover, in the programmable controller 10 of this embodiment, the operation part (not shown) which a user can operate is provided, and this programmable controller 10 is comprised so that the upper limit time can be changed by the operation of this operation part.

[0071] Next, the control procedure in the case where an upper limit is set for the execution time of the communication processing in one scan processing will be described.

[0072] The processing unit 20 executes calculation processing after executing the update p...

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Abstract

The purpose of the present invention is to shorten the time required until the end of the execution units. In the case of a programmable controller which can control the communication in a plurality of channels, in a scanning process, the communication processing procedures and the calculation process with an external device, and in one scan processing as a communication processing target communication port lower than the upper limit of the number of cases, the implementation of the communication process exceeds the upper limit for the communication port in the execution unit of the next cycle.

Description

technical field [0001] The invention relates to a programmable controller and a control method. Background technique [0002] In the past, programmable controllers were used for sequential control of external devices such as motors. The programmable controller executes the operation processing of calculating the information input from the external device and the communication processing of outputting the information obtained in the operation processing to the external device according to the program within one execution unit, and repeatedly executes the execution unit ( For example, Patent Document 1). [0003] Patent Document 1: Japanese Patent Laid-Open No. 2008-198148 [0004] However, programmable controllers are also capable of controlling multiple channel communications. However, if the communication processing of all channels is executed in one execution unit, when the number of channels is large, the proportion of communication processing in one execution unit inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
CPCG05B19/05G05B2219/25268
Inventor 大野弘之吉田卓弘
Owner PANASONIC INDAL DEVICES SUNX