Frequency converter and method for automatically acquiring internal parameter information of product

Abstract

Provided is a method for automatically acquiring the internal parameter information of a product. An external manipulation device is connected with a product through a network to dynamically acquire the internal parameter information of the product, wherein the internal parameter information includes the number of parameter groups, the group number value of each parameter group and the number of parameters in each parameter group. A parameter group number address corresponding to the number of parameter groups is defined, a parameter group number value initial address corresponding to the group number values of the parameter groups is defined, and a parameter group parameter number initial address corresponding to the number of parameters in each parameter group is defined. The external manipulation device reads the parameter information through a communication protocol according to the following steps: (a) reading the parameter group number address to obtain the number MAX of parameter groups; (b) reading the data between the parameter group number value initial address and the parameter group number value initial address+MAX-1 in turn to obtain the group number value of each group of parameters; and (c) reading the data between the parameter group parameter number initial address and the parameter group parameter number initial address+MAX-1 in turn to obtain the number of parameters in each group.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a frequency converter and a method for automatically acquiring product internal parameter information. Background technique [0002] The frequency converter is a relatively complex product, which needs to adapt to various complex places and meet different process requirements, so the number of parameters contained in it is usually hundreds (or even thousands). The more commonly used method is to set a complete set of parameter numbers, parameter attributes, and parameter groupings in the CPU main control board (inside the inverter), and external control devices (such as operation panels, upper computer monitoring software) also need to have a The set of parameters is consistent with that of the CPU main control board. If the internal parameters of the product are changed, the operation panel and CPU main control board must be changed at the same time to ensure th...

AI Technical Summary

Problems solved by technology

Therefore, the existing inverters mainly have the following defects and deficiencies: (1) The operation panel cannot be fully compatible, especially for special customized models and special machines, and special panels must be used

(2) It is impossible to automatically obtain and identify the number of parameters and parameter grouping contained in the product. When the product is upgraded and maintained, if the parameters are adjusted, the parameter definitions of the CPU main control board and the control panel must be modified at the same time to ensure consistency

[0003] Most of the existing parameter attributes are only defined in the CPU main control board. Other control devices cannot obtain the specific circumstances of the parameter attributes, and will not be able to automatically identify the corresponding parameter’s unit, storage address, read and write attributes, and value ranges. It is necessary to redefine a same parameter attribute table in the control device

Not only increases a lot of workload, but also the product compatibility is poor

If the parameter attributes are modified, the operation equipment must be modified synchronously, otherwise it will easily lead to misalignment of parameter attributes

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