A kind of interface expansion method and device of programmable logic controller and frequency converter

A technology of programming logic and interface expansion, which is applied in the field of interface expansion between programmable logic controllers and frequency converters, can solve the problems of reduced applicability and flexibility of frequency converters, complex frequency converter solutions, and failure to achieve modularization, etc., to achieve reduction The number of installations and space, low cost, and the effect of reducing failure points

Active Publication Date: 2022-07-29
SHENZHEN YUNLIN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this technical solution is that multiple CPUs are controlled, no modularization is achieved, the inverter solution is complicated, and the cost increases
Reduced applicability and flexibility of frequency converters

Method used

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  • A kind of interface expansion method and device of programmable logic controller and frequency converter
  • A kind of interface expansion method and device of programmable logic controller and frequency converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 Interface extension method

[0030] See figure 1 , figure 1 An interface expansion method between PLC and frequency converter is shown. The method includes:

[0031] Step S102, establishing internal high-speed communication between the PLC and the frequency converter to realize data exchange;

[0032] Step S104, respectively setting the first mapping storage area and the second mapping storage area in the PLC and the frequency converter; and

[0033] Step S106, through the internal high-speed communication, the data of the first and second mapped storage areas are interacted between the programmable logic controller and the frequency converter, thereby realizing the programmable logic controller The interface to the frequency converter is extended.

[0034] like figure 2 As shown, in step S102 , data exchange can be realized between the PLC 20 and the frequency converter 30 through the internal high-speed communication interface 40 . The internal ...

Embodiment 2

[0061] Embodiment 2 Device

[0062] like figure 2As shown, the present invention also provides a device including a PLC 20 and a frequency converter 30 . In addition, the device also includes: an internal high-speed communication interface 40 for connecting the PLC 20 and the frequency converter 30 to realize data interaction; a first mapping storage area 210, which is provided in the PLC 20 for storing mapped interface information; and a second mapping storage area 310, which is provided in the inverter 30 and used to store the mapped interface information. Wherein, the device is configured to exchange the data of the first and second mapping storage areas 210 and 310 between the PLC 20 and the frequency converter 30 through the internal high-speed communication interface 40 , thereby realizing the PLC The interface between 20 and the frequency converter 30 is extended.

[0063] The specific interface expansion mode of the device and the beneficial effects obtained have...

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Abstract

The embodiment of the present invention discloses a method and device for extending an interface between a programmable logic controller and a frequency converter. The method includes: establishing an internal high-speed communication between the programmable logic controller and the frequency converter to realize data exchange; The programmable logic controller and the frequency converter are provided with a first mapping storage area and a second mapping storage area; and through the internal high-speed communication, the data of the first and second mapping storage areas are stored in the programmable logic controller. There is interaction between the programmable logic controller and the frequency converter, thereby realizing interface expansion between the programmable logic controller and the frequency converter. The invention realizes the mutual expansion of the interfaces between the programmable logic controller and the frequency converter by connecting the programmable logic controller and the frequency converter with an internal high-speed communication interface and using a mapping method. The invention reduces the information exchange cost between the frequency converter and the programmable logic controller, and improves the speed and reliability of the interaction.

Description

technical field [0001] The present invention relates to the technical field of rotation control, in particular to a method and device for interface expansion between a programmable logic controller and a frequency converter. Background technique [0002] In the field of industrial automation control, programmable logic controllers (PLCs) and frequency converters are very common controllers and drivers, respectively. PLC and frequency converter realize information exchange through industrial communication standard or hardware interface. The two have achieved good decoupling, which can be controlled independently or in combination. The combination of the two can flexibly realize the rotation control requirements and control performance in the rotation control industry. [0003] A solution adopted in the prior art is that the PLC is responsible for the logic control, and the frequency converter is responsible for the motor control, so as to drive the normal operation of the mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
CPCG05B19/056G05B2219/13004
Inventor 张超张云祥陈泽丰
Owner SHENZHEN YUNLIN ELECTRIC CO LTD
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