A PLC-based controllable data flow multi-point data acquisition device and method

A data acquisition and data flow technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problems of uncontrollable data flow, lack of flexibility, etc., to achieve controllable data flow, high flexibility, satisfying Effects of data collection requirements

Inactive Publication Date: 2016-08-17
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology

However, these methods or devices often have a fixed data flow direction, such as the main control host computer in the control room. In the absence of the host computer, it often flows to a high-importance PLC, and then the host computer or PLC processes data in a unified manner.
This traditional way of data flow is uncontrollable, lacks flexibility, and cannot adapt to the increasingly complex needs of data collection in new industrial occasions

Method used

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  • A PLC-based controllable data flow multi-point data acquisition device and method
  • A PLC-based controllable data flow multi-point data acquisition device and method

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Such as Figure 1-2 As shown, a kind of PLC-based controllable data flow multi-point data acquisition device of the present invention includes: an industrial computer and several PLCs, and the PLC is connected with a digital input module, an analog input module, a counter module, and a pulse generator module, RS232 module, RS485 module. Number each PLC, and the number is unique, open up a thread pool for each PLC in the industrial computer to handle the data communication of different PLCs, and record these numbers in the industrial computer as a sign to distinguish different PLCs. Each PLC recognizes its own number and the numbers of other PLCs, and the number is resolved into an IP address inside the PLC during communication. Each PLC opens two different ports, one as a data sending port and one as a data receiving port. Each PLC h...

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Abstract

The invention discloses a data acquisition method and device which can be used for multipoint data acquisition on industrial occasions and require controllable data streams. The data acquisition device comprises an industrial personal computer and at least one PLC, the industrial personal computer is connected with the at least one PLC through a switch, each PLC is numbered, and the numbers of all the PLCs are unique and used as markers for differentiating different PLCs. A thread pool is developed for each PLC, and the thread pools are used for processing data communication of different PLCs. The flow direction of data between the industrial personal computer and the PLCs is controlled. Each PLC recognizes its number and the numbers of the other PLCs, and the numbers are analyzed into IP addresses in the PLCs in communication. Two different ports are formed for each PLC, wherein one port is used as a data transmitting port, and the other port is used as a data receiving port. Through the data acquisition device and method, the data stream direction can be controlled, flexibility is high, and the data acquisition device and method can meet requirements of occasions on which the distribution regularity of data acquisition points is poor.

Description

technical field [0001] The invention discloses a data collection method and device which can be used for multi-point data collection in industrial occasions and requires controllable data flow. Background technique [0002] PLC is a commonly used device for data acquisition in the industrial field. PLC has the characteristics of programmable and good stability. PLC-based data acquisition devices or methods are also common. However, these methods or devices often have a fixed data flow direction, such as the main control host computer in the control room. In the absence of the host computer, it often flows to a high-importance PLC, and then the host computer or PLC processes data in a unified manner. . This traditional way of data flow is uncontrollable, lacks flexibility, and cannot adapt to the increasingly complex needs of data collection in new industrial occasions. Contents of the invention [0003] In view of the above-mentioned deficiencies in the prior art, the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 孙凯李智刚秦宝成
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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