CN117691751A - Automatic configuration device and method for parameters of frequency converter of coal mining machine - Google Patents
Automatic configuration device and method for parameters of frequency converter of coal mining machine Download PDFInfo
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Abstract
The invention discloses a device and a method for automatically configuring parameters of a frequency converter of a coal mining machine, which relate to the technical field of coal mining machines, and comprise the following steps: the control unit is respectively connected with the display unit, the input unit, the master frequency converter and the slave frequency converter, and is used for configuring parameters of the frequency converter according to the parameter setting information, collecting state information of the frequency converter and sending the state information to the display unit; the display unit is provided with a main menu interface comprising a frequency converter debugging control and a frequency converter monitoring control, the frequency converter debugging control is triggered to display a frequency converter parameter setting interface on the display unit, and the frequency converter monitoring control is triggered to display a frequency converter state parameter interface on the display unit; and an input unit configured to perform a corresponding input operation in the display unit according to an external operation to generate corresponding information. The invention can automatically configure the parameters of the frequency converter by one key under the condition of not opening the cover plate of the coal mining machine, and can realize the real-time monitoring of the state parameters of the frequency converter.
Description
Technical Field
The invention relates to the technical field of coal mining machines, in particular to an automatic configuration device and method for parameters of a frequency converter of a coal mining machine.
Background
At present, the coal mining machine mostly adopts an ABB ACS800 series frequency converter, and the ABB frequency converter is a frequency converter which is used in mining equipment earlier, and has the advantages of good control effect, mature technology, stable and reliable products, energy conservation and the like.
The traction part variable frequency speed regulation of the coal mining machine comprises two modes: one is a dragging mode, namely, two traction motors of the coal mining machine are respectively controlled by two frequency converters; the other is a one-to-two mode, namely, two traction motors of the coal mining machine are controlled by the same frequency converter. When the coal mining machine is debugged, the frequency converter is required to be configured according to corresponding motor parameters, the traditional frequency converter configuration method is a manual configuration method, and a debugger particularly enters a parameter setting menu through a control panel of the frequency converter to set each parameter, wherein the setting content comprises setting of multiple groups of parameters, such as motor parameter setting, control panel set value and output signal setting, analog output signal setting, transmission parameter setting, fault reset setting, master-slave application setting and the like.
Because the traditional manual configuration method needs to enter a parameter setting menu through a control panel of the frequency converter to set each parameter, the traditional manual configuration method has certain operation difficulty for common operators and is easy to make mistakes. In addition, as the operation is mostly carried out in an underground working environment, an operator is required to open the cover plate of the coal mining machine to manually input parameters, so that the workload required by parameter configuration is large, the working time is long, and certain potential safety hazards exist. In addition, the state parameters of the frequency converter are displayed by the frequency converter control panel, and the display interface and the display fonts on the frequency converter control panel are usually smaller and are in a downhole working environment, so that the state parameters are inconvenient to read and the condition of reading errors is easy to occur.
Disclosure of Invention
In order to solve part or all of the technical problems in the prior art, the invention provides an automatic configuration device and method for parameters of a frequency converter of a coal mining machine.
The technical scheme of the invention is as follows:
in a first aspect, there is provided an apparatus for automatically configuring parameters of a frequency converter of a coal mining machine, the apparatus comprising:
the control unit is respectively in communication connection with the display unit, the input unit and the master frequency converter and the slave frequency converter of the coal mining machine, the master frequency converter is in communication connection with the slave frequency converter, and the control unit is used for acquiring parameter setting information generated by operating the input unit, configuring parameters of the master frequency converter and/or the slave frequency converter according to the parameter setting information, acquiring state information of the master frequency converter and the slave frequency converter and sending the state information to the display unit;
the display unit is provided with a main menu interface comprising a frequency converter debugging control and a frequency converter monitoring control, the frequency converter debugging control is triggered and then displays a frequency converter parameter setting interface on the display unit, a plurality of parameters to be set, a plurality of selection controls and a key configuration virtual key are arranged in the frequency converter parameter setting interface, the frequency converter monitoring control is triggered and then displays a frequency converter state parameter interface on the display unit, and state information of the main frequency converter and the slave frequency converter is displayed in the frequency converter state parameter interface;
the input unit is configured to perform a corresponding input operation in the display unit according to an external operation to generate corresponding information.
In some possible implementations, the parameters to be set in the frequency converter parameter setting interface include: rated parameters of traction motor, traction mode, brake oil circuit pressure switch and frequency converter type.
In some possible implementations, the selection control in the frequency converter parameter setting interface includes: the frequency converter station number modifies the selection control and sets the selection control.
In some possible implementations, the state information in the frequency converter state parameter interface includes: frequency converter type information, frequency converter communication state information, frequency converter control word information, frequency converter state word information, busbar voltage information of the frequency converter, output rotating speed information of the frequency converter, output current information of the frequency converter, bottom plate temperature information of the frequency converter and fault code information of the frequency converter.
In some possible implementations, the main menu interface of the display unit further includes a variable frequency fault code display control, and after the variable frequency fault code display control is triggered, a fault information interface including all fault codes of the frequency converter and fault information corresponding to the fault codes is displayed on the display unit.
In some possible implementations, the control unit is communicatively connected to the master frequency converter and the slave frequency converter through a CAN communication bus, respectively, and the master frequency converter is communicatively connected to the slave frequency converter through an RS422 communication bus.
In some possible implementations, the display unit is communicatively connected to the control unit via an RS232 communication bus, and the input unit is communicatively connected to the control unit via an RS485 communication bus.
In some possible implementations, the control unit is a work machine movement controller.
In a second aspect, there is also provided a method for automatically configuring parameters of a frequency converter of a coal mining machine, where the method is implemented by using the above device for automatically configuring parameters of a frequency converter of a coal mining machine, and the method includes:
triggering the frequency converter debugging control on a main menu interface of the display unit through the input unit so that the display unit displays a frequency converter parameter setting interface;
setting corresponding parameters, triggering required selection controls and triggering one-key configuration virtual keys on the frequency converter parameter setting interface through the input unit according to the frequency converter configuration requirement so as to send parameter setting information to the control unit;
the control unit receiving the parameter setting information modifies and configures the parameters of the master frequency converter and/or the slave frequency converter according to the parameter setting information;
the control unit is enabled to collect state information of the master frequency converter and the slave frequency converter in real time and send the state information to the display unit;
and triggering the frequency converter monitoring control on a main menu interface of the display unit through the input unit so that the display unit displays a frequency converter state parameter interface comprising the received state information of the main frequency converter and the slave frequency converter.
In some possible implementation manners, during the configuration process of the parameters of the frequency converter, if the message sent by the control unit is replied to an error, counting is performed once, and when the number of times corresponding to a certain message replied to the error reaches a set number of times, a signal corresponding to the message sending failure is returned.
The technical scheme of the invention has the main advantages that:
according to the automatic configuration device and method for the parameters of the frequency converter of the coal mining machine, the control unit is connected with the input unit, the display unit and the master-slave frequency converter, the frequency converter parameter setting interface and the frequency converter state parameter interface are arranged in the display unit, relevant parameters of the frequency converter parameter interface in the display unit are set through the input unit, the control unit carries out one-key configuration of the frequency converter parameters according to the frequency converter parameter information set in the display unit, and acquires the state information of the frequency converter and sends the state information to the display unit to be displayed in real time by the display unit, so that the automatic configuration of the frequency converter parameters can be carried out under the condition that the cover plate of the coal mining machine is not opened, the configuration speed of the frequency converter parameters is improved, the configuration time is shortened, the workload of operators is reduced, the technical level requirements of the operators are reduced, potential safety hazards are further reduced, and the safety of coal mine production is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and without limitation to the invention. In the drawings:
FIG. 1 is a schematic diagram of an apparatus for automatically configuring parameters of a frequency converter of a coal mining machine according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a main menu interface of a display unit according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a parameter setting interface of a display unit according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a converter status parameter interface of a display unit according to an embodiment of the invention;
FIG. 5 is a diagram illustrating a fault information interface of a display unit according to an embodiment of the invention;
fig. 6 is a flowchart of a method for automatically configuring parameters of a frequency converter of a coal mining machine according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following describes in detail the technical scheme provided by the embodiment of the invention with reference to the accompanying drawings.
1-4, an embodiment of the present invention provides an apparatus for automatically configuring parameters of a frequency converter of a coal mining machine, including:
the control unit 1 is respectively in communication connection with the display unit 2, the input unit 3, the main frequency converter 4 and the auxiliary frequency converter 5 of the coal mining machine, the main frequency converter 4 is in communication connection with the auxiliary frequency converter 5, the control unit 1 is used for acquiring parameter setting information generated by operating the input unit, configuring parameters of the main frequency converter 4 and/or the auxiliary frequency converter 5 according to the parameter setting information, acquiring state information of the main frequency converter 4 and the auxiliary frequency converter 5 and sending the state information to the display unit 2;
the display unit 2 is provided with a main menu interface comprising a frequency converter debugging control and a frequency converter monitoring control, the frequency converter debugging control is triggered and then a frequency converter parameter setting interface is displayed on the display unit 2, a plurality of parameters to be set, a plurality of selection controls and one-key configuration virtual keys are arranged in the frequency converter parameter setting interface, after the frequency converter monitoring control is triggered, a frequency converter state parameter interface is displayed on the display unit 2, and state information of the main frequency converter 4 and the slave frequency converter 5 is displayed in the frequency converter state parameter interface;
an input unit 3 configured to perform a corresponding input operation in the display unit 2 according to an external operation to generate corresponding information.
The following describes the use process and principle of the automatic configuration device for parameters of the frequency converter of the coal mining machine according to an embodiment of the present invention:
specifically, when the frequency conversion parameter configuration of the frequency converter of the coal mining machine is required, triggering a frequency converter debugging control on a main menu interface of the display unit through the input unit, so that the display unit displays a frequency converter parameter setting interface; then, determining the actual parameter configuration requirement of the frequency converter, carrying out corresponding parameter setting, required selection control triggering and one-key configuration virtual key triggering input operation on a parameter setting interface of the frequency converter through an input unit according to the determined parameter configuration requirement, and after the parameter setting, the selection control and the virtual key triggering are completed, enabling a display unit to acquire corresponding information and sending the corresponding information to a control unit; the control unit receiving the parameter setting information triggers and generates a corresponding frequency converter parameter modification instruction according to the parameter setting information so as to modify and configure the parameters of the master frequency converter and/or the slave frequency converter connected with the control unit; after parameter configuration of the frequency converter is completed, the control unit collects state information of the master frequency converter and the slave frequency converter in real time and sends the state information to the display unit so that the display unit displays the state information.
When the state information of the frequency converter of the coal mining machine needs to be read, the frequency converter monitoring control is triggered on the main menu interface of the display unit through the input unit, so that the display unit displays the state parameter interface of the frequency converter, and the state information of the frequency converter is directly read from the state parameter interface of the frequency converter.
It can be seen that the automatic configuration device for parameters of the frequency converter of the coal mining machine provided by the embodiment of the invention is connected with the input unit, the display unit and the master-slave frequency converter through the control unit, the frequency converter parameter setting interface and the frequency converter state parameter interface are arranged in the display unit, related parameters of the frequency converter parameter interface in the display unit are set through the input unit, the control unit carries out one-key configuration of the frequency converter parameters according to the frequency converter parameter information set in the display unit, and acquires the state information of the frequency converter and sends the state information to the display unit to be displayed in real time by the display unit, so that the automatic configuration of the frequency converter parameters can be carried out under the condition that the cover plate of the coal mining machine is not opened, the configuration speed of the frequency converter parameters is improved, the configuration time is shortened, the workload of operators is reduced, the technical level requirements of the operators are reduced, the potential safety hazards are further reduced, and the safety of coal mine production is improved.
Referring to fig. 2, in an embodiment of the present invention, besides a frequency converter debugging control and a frequency converter monitoring control, a main menu interface of the display unit may be provided with: the system comprises a main picture control, a system protection control, a debugging switch control, a temperature flow setting control, a function setting control, an auxiliary protection control, an auxiliary setting control, a remote control system control, a bus state control, a transmission display control, a history alarm control, an output open circuit and short circuit control, a variable frequency fault code display control, an intelligent setting control, an acquisition box configuration control and a plurality of standby controls capable of performing function expansion. The functions and the purposes of each control can be specifically configured according to actual requirements. For example, referring to fig. 5, the variable frequency fault code display control is configured to: after the variable frequency fault code display control is triggered, a fault information interface comprising all fault codes of the frequency converter and fault information corresponding to the fault codes is displayed on the display unit.
The plurality of functional controls are arranged in the display unit, so that the use and operation efficiency of the coal mining machine can be further improved, and the production efficiency of the coal mine can be improved.
Further, referring to fig. 3, in an embodiment of the present invention, parameters to be set in the parameter setting interface of the frequency converter include: rated parameters of traction motor, traction mode, brake oil circuit pressure switch and frequency converter type.
Specifically, the rated parameters of the traction motor further include: rated voltage, rated current, rated frequency, rated rotational speed, and rated power of the traction motor.
The traction modes comprise alternative modes of one-to-one and one-to-two, wherein the mode of one-to-one indicates that two traction motors of the coal mining machine are respectively controlled by two frequency converters, and the mode of one-to-two indicates that the two traction motors of the coal mining machine are controlled by the same frequency converter.
The brake fluid circuit pressure switch includes an alternative pressure switch and a no pressure switch.
The frequency converter types include alternative "two-quadrant" types and "four-quadrant" types.
When parameters are set, specific values of rated voltage, rated current, rated frequency, rated rotating speed and rated power of the traction motor are input into a parameter setting interface of the frequency converter through an input unit, and a traction mode, a brake oil circuit pressure switch type and a frequency converter type are selected from the parameter setting interface of the frequency converter through the input unit.
Further, referring to fig. 3, in an embodiment of the present invention, a selection control in the frequency converter parameter setting interface includes: the frequency converter station number modifies the selection control and sets the selection control.
After the frequency converter station number modification selection control is triggered, a frequency converter station number modification window is displayed on the display unit, and corresponding input operation is performed on the frequency converter station number modification window through the input unit so as to input frequency converter station number modification information.
The control unit automatically configures parameters of the frequency converter based on the parameters of the frequency converter which are currently set after triggering the virtual key configuration and the setting selection control through the input unit and triggering the virtual key configuration and the setting selection control through the one key.
Referring to fig. 4, further, in an embodiment of the present invention, the state information in the inverter state parameter interface includes: frequency converter type information, frequency converter communication state information, frequency converter control word information, frequency converter state word information, busbar voltage information of the frequency converter, output rotating speed information of the frequency converter, output current information of the frequency converter, bottom plate temperature information of the frequency converter and fault code information of the frequency converter.
The control command currently received by the frequency converter is displayed through the control word information, and the current state of the frequency converter is displayed through the state word information. According to the fault code information of the frequency converter displayed in the frequency converter state parameter interface, the actual fault condition of the frequency converter can be determined by inquiring the fault information interface comprising all fault codes of the frequency converter and the fault information corresponding to the fault codes.
Further, in an embodiment of the present invention, the control unit is connected to the master frequency converter and the slave frequency converter through the CAN communication bus, and the master frequency converter is connected to the slave frequency converter through the RS422 communication bus.
Specifically, when the control unit and the frequency converter are connected through the CAN communication bus, the RCAN-01 communication adapter card is inserted into a corresponding slot of the control main board of the frequency converter, so that the frequency converter and the controller are communicated through the CAN bus. When the master frequency converter and the slave frequency converter are connected through the RS422 communication bus, the transmitting data end TX of the master frequency converter is connected with the receiving data end RX of the slave frequency converter, and the receiving data end RX of the master frequency converter is connected with the transmitting data end TX of the slave frequency converter.
Further, in an embodiment of the present invention, the display unit is communicatively connected to the control unit through an RS232 communication bus, and the input unit is communicatively connected to the control unit through an RS485 communication bus.
Specifically, when the display unit and the control unit are connected through the RS232 communication bus, the transmitting data terminal TX of the control unit is connected to the receiving data terminal RX of the display unit, and the receiving data terminal RX of the control unit is connected to the transmitting data terminal TX of the display unit.
In one embodiment of the present invention, the control unit is a work machine motion controller (STW).
Further, in an embodiment of the present invention, the display unit is a display screen or a human-machine interface, and the input unit includes: and the coal cutter end station and the wireless remote controller.
In a second aspect, referring to fig. 6, an embodiment of the present invention further provides a method for automatically configuring parameters of a frequency converter of a coal mining machine, where the method is implemented by using the above device for automatically configuring parameters of a frequency converter of a coal mining machine, and includes the following steps:
step S1, triggering a frequency converter debugging control on a main menu interface of a display unit through an input unit so that the display unit displays a frequency converter parameter setting interface;
step S2, setting corresponding parameters, triggering required selection controls and triggering one-key configuration virtual keys on a frequency converter parameter setting interface through an input unit according to the frequency converter configuration requirement so as to send parameter setting information to a control unit;
step S3, the control unit which receives the parameter setting information modifies and configures the parameters of the master frequency converter and/or the slave frequency converter according to the parameter setting information;
s4, enabling the control unit to acquire state information of the master frequency converter and the slave frequency converter in real time and send the state information to the display unit;
and S5, triggering a frequency converter monitoring control on a main menu interface of the display unit through the input unit so that the display unit displays a frequency converter state parameter interface comprising the received state information of the main frequency converter and the slave frequency converter.
Specifically, in an embodiment of the present invention, the control unit that receives the parameter setting information modifies and configures parameters of the master frequency converter and/or the slave frequency converter according to the parameter setting information, and further includes:
the control unit which receives the parameter setting information triggers a variable frequency parameter modification instruction according to the parameter setting information, so that the CAN communication bus between the control unit and the frequency converter is reset, and information is sent to the frequency converter, if the control unit does not receive the reply, the CAN communication bus is reset again, and information is sent to the frequency converter, and if the reply is received, the next parameter configuration is carried out. Then, determining a control mode of the frequency converter according to the parameter setting information, and if the control mode is a one-to-one control mode, sequentially performing the following operations: the parameters of the frequency converter are controlled to restore factory settings, the communication parameters of the CAN communication bus of the frequency converter are set, the PDO mapping of the frequency converter is configured through SDO, the preliminary setting of the control parameters is carried out, the parameters of the traction motor are set, the CAN communication bus corresponding to the master frequency converter and the slave frequency converter are started, the identification of the master frequency converter and the slave frequency converter is carried out, the CAN communication bus corresponding to the master frequency converter and the slave frequency converter is reset, and the parameter setting of the master frequency converter and the slave frequency converter is carried out. If the control mode is a one-to-two control mode, the following operations are sequentially carried out: the parameters of the frequency converter are controlled to restore factory settings, the communication parameters of the CAN communication bus of the frequency converter are set, the PDO mapping of the frequency converter is configured through SDO, the preliminary setting of the control parameters is carried out, the parameters of the traction motor are set, the CAN communication bus corresponding to the frequency converter to be configured is started, the identification of the frequency converter to be configured is carried out, the reset is carried out on the CAN communication bus corresponding to the frequency converter to be configured, and the parameter setting of the frequency converter to be configured is carried out.
Further, in an embodiment of the present invention, during the configuration process of the parameters of the frequency converter, if the message sent by the control unit is replied to an error, counting is performed once, and when the number of times corresponding to a certain message replied to the error reaches a set number of times, a signal corresponding to the message sending failure is returned.
By counting the message reply errors and returning a message sending failure signal, errors in the configuration process can be found and timely adjusted.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a coal-winning machine converter parameter automatic configuration device which characterized in that includes:
the control unit is respectively in communication connection with the display unit, the input unit and the master frequency converter and the slave frequency converter of the coal mining machine, the master frequency converter is in communication connection with the slave frequency converter, and the control unit is used for acquiring parameter setting information generated by operating the input unit, configuring parameters of the master frequency converter and/or the slave frequency converter according to the parameter setting information, acquiring state information of the master frequency converter and the slave frequency converter and sending the state information to the display unit;
the display unit is provided with a main menu interface comprising a frequency converter debugging control and a frequency converter monitoring control, the frequency converter debugging control is triggered and then displays a frequency converter parameter setting interface on the display unit, a plurality of parameters to be set, a plurality of selection controls and a key configuration virtual key are arranged in the frequency converter parameter setting interface, the frequency converter monitoring control is triggered and then displays a frequency converter state parameter interface on the display unit, and state information of the main frequency converter and the slave frequency converter is displayed in the frequency converter state parameter interface;
the input unit is configured to perform a corresponding input operation in the display unit according to an external operation to generate corresponding information.
2. The automatic configuration device of parameters of a frequency converter of a coal mining machine according to claim 1, wherein the parameters to be set in the frequency converter parameter setting interface include: rated parameters of traction motor, traction mode, brake oil circuit pressure switch and frequency converter type.
3. The automatic configuration device of parameters of a coal mining machine frequency converter according to claim 2, wherein the selection control in the frequency converter parameter setting interface comprises: the frequency converter station number modifies the selection control and sets the selection control.
4. The automatic configuration device of parameters of a frequency converter of a coal mining machine according to claim 1, wherein the state information in the frequency converter state parameter interface includes: frequency converter type information, frequency converter communication state information, frequency converter control word information, frequency converter state word information, busbar voltage information of the frequency converter, output rotating speed information of the frequency converter, output current information of the frequency converter, bottom plate temperature information of the frequency converter and fault code information of the frequency converter.
5. The automatic configuration device for parameters of a frequency converter of a coal mining machine according to claim 4, wherein the main menu interface of the display unit further comprises a frequency conversion fault code display control, and the frequency conversion fault code display control displays a fault information interface comprising all fault codes of the frequency converter and fault information corresponding to the fault codes on the display unit after being triggered.
6. The automatic parameter configuration device of a coal cutter frequency converter according to claim 1, wherein the control unit is respectively in communication connection with the master frequency converter and the slave frequency converter through a CAN communication bus, and the master frequency converter is in communication connection with the slave frequency converter through an RS422 communication bus.
7. The automatic configuration device for parameters of a frequency converter of a coal mining machine according to claim 1, wherein the display unit is in communication connection with the control unit through an RS232 communication bus, and the input unit is in communication connection with the control unit through an RS485 communication bus.
8. The automatic configuration device of parameters of a frequency converter of a coal mining machine according to claim 1, wherein the control unit is a movement controller of the construction machine.
9. A method for automatically configuring parameters of a frequency converter of a coal mining machine, characterized in that the method is implemented by using the automatic configuration device for parameters of the frequency converter of the coal mining machine according to any one of claims 1 to 8, and comprises the following steps:
triggering the frequency converter debugging control on a main menu interface of the display unit through the input unit so that the display unit displays a frequency converter parameter setting interface;
setting corresponding parameters, triggering required selection controls and triggering one-key configuration virtual keys on the frequency converter parameter setting interface through the input unit according to the frequency converter configuration requirement so as to send parameter setting information to the control unit;
the control unit receiving the parameter setting information modifies and configures the parameters of the master frequency converter and/or the slave frequency converter according to the parameter setting information;
the control unit is enabled to collect state information of the master frequency converter and the slave frequency converter in real time and send the state information to the display unit;
and triggering the frequency converter monitoring control on a main menu interface of the display unit through the input unit so that the display unit displays a frequency converter state parameter interface comprising the received state information of the main frequency converter and the slave frequency converter.
10. The method for automatically configuring parameters of a frequency converter of a coal mining machine according to claim 9, wherein in the configuring process of the parameters of the frequency converter, if the message sent outwards by the control unit returns an error, counting is performed once, and when the number of times corresponding to a certain message return error reaches a set number of times, a signal corresponding to the message sending failure is returned.
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