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Interface expansion method 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, failure to realize modularization, and complex frequency converter solutions, etc., to achieve reduction The number of installations and space, low cost, and the effect of reducing failure points

Active Publication Date: 2019-11-15
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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  • Interface expansion method of programmable logic controller and frequency converter
  • Interface expansion method 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 A method for extending the interface between a PLC and a frequency converter is shown. The method includes:

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

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

[0033] Step S106, through the internal high-speed communication, the data in the first and second mapped storage areas are exchanged between the programmable logic controller and the frequency converter, so as to realize the programmable logic controller The interface with the frequency converter is extended.

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

Embodiment 2

[0061] Embodiment two device

[0062] Such as figure 2As shown, the present invention also provides a device including PLC 20 and frequency converter 30 . In addition, the device also includes: an internal high-speed communication interface 40, which is used to connect the PLC 20 and the frequency converter 30 to realize data interaction; a first mapping storage area 210, which is set in the PLC 20, and is used to store mapped interface information; And the second mapping storage area 310 is set in the frequency converter 30 and is used for storing 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 PLC 20 and the interface expansion of the frequency converter 30.

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

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PUM

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Abstract

An embodiment of the invention discloses an interface expansion method of a programmable logic controller and a frequency converter. The method comprises the steps of establishing internal high-speedcommunication between the programmable logic controller and the frequency converter to realize data interaction; arranging a first mapping storage area and a second mapping storage area in the programmable logic controller and the frequency converter respectively; and interacting data of the first and second mapping storage areas between the programmable logic controller and the frequency converter through the internal high-speed communication, so that interface expansion of the programmable logic controller and the frequency converter is realized. According to the interface expansion method,the programmable logic controller and the frequency converter are connected through an internal high-speed communication interface, and the mapping mode is adopted, so that the interface between the programmable logic controller and the frequency converter is expanded. The cost of information interaction between the frequency converter and the programmable logic controller is reduced, and the interaction speed and reliability are improved.

Description

technical field [0001] The invention relates to the technical field of rotation control, in particular to an interface expansion method between a programmable logic controller and a frequency converter. Background technique [0002] In the field of industrial automation control, programmable logic controller (PLC) and frequency converter are very common controllers and drives respectively. The PLC and the frequency converter realize information exchange through industrial communication standards or hardware interfaces. The two are well decoupled and 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] One 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 motor to run normally. However, the disadvantage of th...

Claims

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Application Information

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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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