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
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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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