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Blow molding equipment control system and method based on CAN bus and Ethernet communication

A technology of CAN bus and control method, which is applied in the field of control system, can solve problems such as inability to meet various work requirements, real-time performance and stability defects, etc., and achieve the effect of strong anti-interference ability

Active Publication Date: 2020-11-17
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the current control system has defects in real-time and stability, and cannot meet various work requirements;

Method used

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  • Blow molding equipment control system and method based on CAN bus and Ethernet communication
  • Blow molding equipment control system and method based on CAN bus and Ethernet communication
  • Blow molding equipment control system and method based on CAN bus and Ethernet communication

Examples

Experimental program
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Embodiment 1

[0056] see Figure 1 to Figure 5 As shown, the embodiment of the present invention provides a blow molding equipment control system based on CAN bus and Ethernet communication, the control system includes:

[0057] The upper computer unit 1, which is used to input the upper computer control instructions;

[0058] Work control unit 2, which is used to control the working parts of the film blowing equipment or monitor the working data of the film blowing equipment and transmit it to the host computer unit 1;

[0059] PLC control unit 3, which is used to receive host computer control instructions, and send work control instructions to work control unit 2;

[0060] Wherein, the upper computer unit 1 carries out signal connection with the PLC control unit 3 through the Ethernet communication unit 4, and the PLC control unit 3 carries out signal connection with the work control unit 2 through the CAN bus unit 5.

[0061] In the embodiment of the present invention, host computer un...

Embodiment 2

[0118] like Figures 6 to 8 As shown, the second embodiment of the present invention provides a blow molding equipment control method based on CAN bus and Ethernet communication, the control method includes the following steps:

[0119] S1, preset Ethernet communication unit 4 between upper computer unit 1 and PLC control unit 3, carry out signal connection with upper computer unit 1 and PLC control unit 3;

[0120] S2, preset CAN bus unit 5 between work control unit 2 and upper computer unit 1, carry out signal connection with upper computer unit 1 and work control unit 2;

[0121] S3, upper computer unit 1 sends upper computer control instruction to PLC control unit 3 by Ethernet communication unit 4;

[0122] S4, the PLC control unit 3 receives the upper computer control instruction, and sends the work control instruction to the work control unit 2 through the CAN bus unit 5.

[0123] In the embodiment of the present invention, host computer unit 1 carries out signal conn...

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PUM

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Abstract

The invention discloses a blow molding equipment control system and method based on CAN (Controller Area Network) bus and Ethernet communication, and relates to the technical field of control systems.The control system comprises an upper computer unit, a work control unit and a PLC (Programmable Logic Controller) control unit, wherein the upper computer unit is used for inputting an upper computer control instruction; the work control unit is used for controlling the work component of film blow molding equipment or monitoring the work data of the film blow molding equipment and transmitting the work data to the upper computer unit; the PLC control unit is used for receiving the upper computer control instruction and sending the work control instruction to the work control unit; the uppercomputer unit carries out signal connection with the PLC control unit through an Ethernet communication unit; and the PLC control unit carries out signal connection with the work control unit throughthe CAN bus unit. By use of the control system, an Ethernet communication framework and a CAN bus communication means are combined so as to provide a stable and high-speed communication environment for the control system, and guarantee is provided for the control work of the blow molding equipment.

Description

technical field [0001] The invention relates to the technical field of control systems, in particular to a blow molding equipment control system and method based on CAN bus and Ethernet communication. Background technique [0002] At present, the control system of the film blowing unit can have various structures according to the complexity of the film blowing machine. For example, single-layer to three-layer co-extrusion film blowing units are mostly controlled by a separate PLC, which is used with the human-machine interface and the inverter unit. RS485 serial connection; [0003] The film blowing units with more than three floors mostly adopt multiple PLC cascading structures, but no matter what kind of control structure, communication speed, stability and cost factors must be considered according to the actual production and operating environment; [0004] The communication speed of the traditional control system based on RS485 serial communication structure is limited ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/25257
Inventor 王超黄民钰
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES