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Analog conversion device and programmable controller system

A programming controller, analog conversion technology, applied in the field of PLC system, can solve problems such as troublesome, and achieve the effect of eliminating time loss

Active Publication Date: 2015-07-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, there is a problem that, in this reading process, it is necessary to perform dedicated communication processing many times, which is troublesome.

Method used

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  • Analog conversion device and programmable controller system
  • Analog conversion device and programmable controller system
  • Analog conversion device and programmable controller system

Examples

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Embodiment Construction

[0023] Next, preferred embodiments of the analog conversion device and the programmable controller system according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to this embodiment.

[0024] figure 1 It is a block diagram schematically showing the configuration of a PLC system including an A / D converter (analog unit). A / D conversion unit 100 is connected to CPU unit 200 via inter-unit bus 300 , and A / D conversion unit 100 and CPU unit 200 constitute a part of PLC (programmable controller) 1000 . In the PLC 1000, in addition to the A / D conversion unit 100 and the CPU unit 200, a motion controller unit and a temperature controller unit are installed via the inter-unit bus 300 according to the purpose, but here, the A / D conversion unit is not mentioned. Units other than the conversion unit 100 and the CPU unit 200, wherein the motion controller unit controls the servo amplifier and the like to per...

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PUM

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Abstract

Provided is an A / D conversion device, comprising: an A / D conversion part (120) which converts to a digital value an analog value which is inputted from outside; a shared memory (140), further comprising an A / D conversion value storage region (141) which stores the converted digital value, and a log storage region (142) which logs the digital value which is stored in the A / D conversion value storage region (141), and whereby read access is possible from a central processing unit (200) which controls a programmable controller overall; a logging execution part (131) which stores in the log storage region (142) the digital value which is stored in the A / D conversion value storage region (141) as logging data (700); a given point number logging detection part (132) which monitors whether, after carrying out a preceding interrupt generation request, the number of items of the logging data (700) which is stored in the log storage region (142) has reached a prescribed number; and an interrupt generation part (133) which, if the number of items of the logging data (700) has reached the prescribed number, carries out an interrupt generation request with respect to the central processing unit (200).

Description

technical field [0001] The present invention relates to an analog conversion device incorporated in a programmable controller (hereinafter referred to as PLC), and a PLC system. Background technique [0002] When inputting an analog data value to PLC, the A / D conversion means (A / D conversion device) which converts an analog data value into a digital value is used. Usually, the sampling cycle of the A / D conversion of the A / D conversion unit that converts the input analog data value into a digital value, and the control cycle (scan time) of the CPU (Central Processing Unit) unit that controls the entire PLC system are It is often asynchronous and the sampling cycle is high-speed. Therefore, when performing logging of the A / D conversion values, it is difficult for the CPU unit to obtain and log all the A / D conversion values ​​without omission. [0003] As a method of acquiring and recording all A / D conversion values ​​without omission, there is a method of performing logging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
CPCG05B19/05G01D9/005G06F3/0614G06F3/0653G06F3/0683H03M1/12
Inventor 落合伸一郎
Owner MITSUBISHI ELECTRIC CORP