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
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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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