JP2007252162A - Motor drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor drive device that improves the communication efficiency in-between high-order communication equipment, while facilitating reading-in or writing-in of a parameter from the high-order communications equipment, even when the motor drive device changes a communication address of the parameter due to upgrade or the like, and its parameter setting method. <P>SOLUTION: A storage part 17 is provided with a communication address storage part 172 for storing the relation between the communication address of the parameter and the parameter number. A control part 11 is provided with a parameter extraction part 18 for extracting the parameter number, by inputting the communication address of the parameter used, when reading-in or writing-in of the parameter of the motor drive device 10 are executed from the high-order communications equipment 50. An operation panel part 16 is provided with a communication address setting part 165 for setting the communication address of the parameter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric motor drive device that has a function of setting a plurality of parameters and reads and writes parameters from a higher-level communication device through communication.

In an electric motor drive device such as an inverter for controlling a motor, a drive operation corresponding to a load can be realized for the first time by setting various functions provided in the electric motor drive device itself with parameters. In recent years, with the improvement of the function of the device itself, the parameters to be set are increasing more and more (for example, about 600 items), and there is a tendency to increase the burden on the user parameter setting operation. As a countermeasure, for example, Patent Document 1 and Patent Document 2 propose a method of flexibly rearranging parameter display, numbers, display order, and the like according to the application.
On the other hand, with the progress of system communication networking, parameter setting and operation of an electric motor drive device are being performed from a host communication device such as a programmable controller. For this reason, a fixed communication address is assigned to each parameter for identification in the motor drive device that is a slave device, and the higher-level communication device reads and writes the set value for the communication address of that parameter. Request is being made.
In the following description, when simply referred to as a communication address, it refers to a communication address of a parameter of the motor drive device.

FIG. 11 is a diagram illustrating an example of parameters of a conventional electric motor drive device.
As shown in FIG. 11, each parameter number is associated with a parameter name indicating the parameter content, a parameter setting value, and a communication address corresponding to the parameter content.
When reading parameters to the motor drive device, which is a slave device, from a host communication device that is a master during communication, the parameters are read using a communication command message.
FIG. 12 is a diagram illustrating an example of a communication command message from a higher-level communication device.
The message format at this time is the slave address part that specifies the identification address of the slave device to be sent and received, the function code part that specifies communication commands such as read and write, and the continuous address that requires the communication address and its address at the beginning. It consists of a data part that specifies the number and an error check part that detects errors such as garbled data during transmission.
When reading a parameter that is a plurality of continuous addresses by this message, the minimum value of the address to be read is specified, and then the number of continuous data is specified and read by one communication message. On the other hand, when reading parameters of discontinuous communication addresses, it is necessary to make communication requests in a number of times corresponding to the number of discontinuities.
JP 2002-223585 A JP 2003-259688 A

In a conventional motor drive device such as an inverter, a fixed communication address is assigned to each parameter for identification from a host communication device. If there is a change from the one, there is a problem that it is necessary to modify the software of the host communication device or the motor drive device because the communication with the host communication device such as the programmable controller is not compatible with the conventional one.
In addition, when reading a plurality of parameters from a higher-level communication device, there is a problem in that the communication efficiency decreases when the communication address of the parameter is not continuous, compared to the case where the communication address is continuous.
The parameters to be set are increasing more and more (for example, about 600 items), and the communication addresses of parameters to be read from the host communication device are often discontinuous.
A method of flexibly rearranging parameter display, number, display order, and the like has been proposed as in Patent Document 1 and Patent Document 2, but an operation on a communication address used in a host communication device cannot be performed.
The present invention has been made in view of such problems, and makes it possible to easily read and write parameters from a higher-level communication device even when the motor drive device changes the communication address of the parameters due to an upgrade or the like. In addition, an object is to provide an electric motor drive device that improves communication efficiency with a host communication device.

In order to solve the above problem, the present invention is configured as follows.
The invention described in claim 1 includes a control unit that is connected to a higher-level communication device via a communication network and that performs calculation and communication of a command from the higher-level communication device, and a drive unit that outputs a drive command to the motor. A communication unit that interfaces with the communication network, a CPU that performs arithmetic processing, a control unit that performs motor control processing, an operation panel unit that performs operation processing and display processing from operation keys, In the electric motor drive device having a storage unit for storing parameters and the like, the storage unit includes a communication address storage unit for storing a relationship between the communication address of the parameter and the parameter number, and the control unit includes the host communication device. Parameter communication address used when reading or writing parameters of the motor drive device from As input, it includes a parameter extraction unit for extracting a parameter number, the operation panel, and is characterized in that a communication address setting section for setting a communication address of said parameters.

  The invention described in claim 2 is a control unit that is connected to a higher-level communication device and an external support device via a communication network, and that performs calculation and communication of a command from the higher-level communication device, and a drive command to the motor. The control unit includes a communication unit that interfaces with the communication network, a CPU that performs arithmetic processing, a control unit that performs motor control processing, and operation processing and display processing from operation keys. In the electric motor drive device having an operation panel unit for performing the operation and a storage unit for storing parameters and the like, the storage unit includes a communication address storage unit for storing a relationship between the communication address of the parameter and the parameter number, and the control A parameter used when reading or writing parameters of the motor drive device from the host communication device. A parameter extraction unit for extracting a parameter number with the communication address of the meter as an input, and a reception communication address setting unit for setting the communication address of the parameter in the communication address storage unit by a communication address setting message from the external support device It is characterized by comprising.

  According to a third aspect of the present invention, there is provided the motor drive device according to the first or second aspect, wherein the storage unit is configured to store various parameters of the motor drive device model with a standard model of the communication address of the parameter. A template storage unit for storing the difference as a template is further provided. The control unit further includes a template setting unit, and the template setting unit refers to the template storage unit according to a template selection parameter for selecting the template. Then, the communication address of the parameter is collectively changed to that of the template.

According to the first aspect of the present invention, the storage unit of the electric motor drive device includes the communication address storage unit that stores the relationship between the communication address of the parameter and the parameter number, and the control unit receives the parameter of the electric motor drive device from the host communication device. Since the communication address of the parameter to be used when reading and writing is input, the parameter extraction unit for extracting the parameter number is provided, and the operation panel unit is provided with the communication address setting unit for setting the communication address of the parameter. The user can arbitrarily set the parameter communication address, and even when the motor drive device changes the parameter communication address due to an upgrade or the like, the parameter can be easily read and written from the host communication device.
Further, when reading a plurality of parameters whose communication addresses are not continuous, if the communication addresses are changed so as to be continuous, they can be read with one communication message, and communication efficiency is improved.
According to the second aspect of the present invention, the storage unit of the electric motor driving device includes the storage unit that includes a communication address storage unit that stores the relationship between the communication address of the parameter and the parameter number, and the control unit receives the electric motor from the higher-level communication device. Input the parameter communication address to be used when reading and writing the parameters of the driving device, the parameter extraction unit for extracting the parameter number, and the parameter of the communication address storage unit by the communication address setting message from the external support device Since the receiving communication address setting unit for setting the communication address is provided, the user can arbitrarily set the communication address of the parameter from the external support device, and even when the motor drive device changes the communication address of the parameter due to upgrade etc. Can read and write parameters It can be in.
According to the invention described in claim 3, the storage unit of the motor drive device further includes a template storage unit that stores the difference between the standard model of the communication address of the parameter of the model of the various motor drive devices as a template, The control unit further includes a template setting unit, and the template setting unit refers to the template storage unit according to the template selection parameter for selecting the template, and sets the communication address of the parameter to the template one at a time. However, the parameter communication address can be arbitrarily set using the template, and even when the motor drive device changes the parameter communication address due to an upgrade or the like, the parameter can be easily read and written from the host communication device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an electric motor drive device according to a first embodiment of the present invention.
In FIG. 1, reference numeral 10 denotes an electric motor drive device such as an inverter, which controls a motor 30 such as an induction motor. The electric motor drive device 10 is connected to a higher-level communication device 50 such as a programmable controller via the communication network 40. The host communication device 50 transmits / receives operation, frequency command, and parameter setting value read / write commands to the motor drive device 10 via the communication network 40, and the motor drive device 10 rotates the motor 30 based on the data. Let
The electric motor drive device 10 includes a control unit 11 that performs calculation and communication of a command from the host communication device 50 and a drive unit 12 that outputs a drive command to the motor 30.
The control unit 11 includes a communication unit 13 that interfaces with the communication network 40, a CPU 14 that performs arithmetic processing, a control unit 15 that performs motor control processing, and an operation panel unit that performs operation processing and display processing from the operation keys 162. 16, a storage unit 17 that stores parameters, a parameter extraction unit 18 that extracts parameters from communication addresses of parameters, and a template setting unit 19 that collectively sets communication addresses from templates.
Here, the communication address is an address assigned for identification with respect to each parameter of the motor drive device, and a higher-level communication device requests to read or write a set value with respect to the communication address of the parameter. Is done. Further, hereinafter, when simply referred to as a communication address, it refers to a communication address of a parameter of the motor drive device.

The operation panel unit 16 has a structure that can be attached to and detached from the electric motor drive device 10, and is connected to the electric motor drive device 10 through a communication line.
The operation panel unit 16 includes a display unit 161 that performs display, an operation key 162, a mode selection unit 163 that selects a mode, a parameter setting unit 164 that sets a parameter value, and a communication address setting unit 165 that sets a communication address.
The storage unit 17 includes a parameter storage unit 171 that stores parameters, a communication address storage unit 172 that stores the relationship between communication addresses and parameters, and a template storage unit 173 that stores templates of communication addresses.
FIG. 2 is a diagram showing a correspondence table of communication addresses and parameter numbers stored in the communication address storage unit 172.
Parameter numbers are stored in one-to-one correspondence with communication addresses. The communication address storage unit 172 stores parameter numbers in order of communication addresses as shown in FIG. 2 so that parameters can be easily extracted from the designation of communication addresses.
The present invention is different from the prior art in that it includes a communication address setting unit 165, a communication address storage unit 172, a template storage unit 173, a parameter extraction unit 18, and a template setting unit 19, so that the user can freely change the communication address of the parameter. This is the point.

Details of changing the communication address will be described below.
FIG. 3 is a diagram illustrating an example of the operation panel unit 16.
In FIG. 3, reference numeral 162 denotes operation keys. In this example, there are six operation keys. 161a is a data display unit for displaying parameter setting values and operating states, 161b is a program mode (PROG) for setting parameters, a drive mode (DRIVE) for driving, and an address mode (ADRES) for setting parameter communication addresses It is the mode display part which displays which mode of which is. 161a and 161b constitute the display unit 161 of FIG.
The operation panel unit 16 is different from the conventional one in that an address mode (ADRESS) is added to the mode display unit 161b for setting a communication address, and the communication address is set in the address mode.

FIG. 4 is a diagram showing an operation flowchart of the operation panel unit 16.
By pressing the MENU key of the operation key 162 of the operation panel unit 16, it is possible to select any one of a program mode S1 for parameter setting, a drive mode S2 for operation, and an address mode S3 for setting a communication address. is there. When the ENTER key of the operation key 162 is pressed in the program mode S1 for setting parameters, a parameter reference screen in S4 is displayed. Further, when changing the display to another parameter, it is possible to change to the next parameter reference screen of S5 by pressing the increment key 162a or the decrement key 162b of the operation key 162. To change the parameter setting value, press the ENTER key of the operation key 162 while the parameter reference screen of S4 is displayed, and the parameter data setting screen of S8 is displayed. Here, the increment key 162a or the decrement key 162b is pressed. Use to set the value of the parameter.

This operation flowchart is different from the conventional one by pressing the MENU key of the operation key 162 to set the parameter communication address in addition to the conventional program mode S1 for parameter setting and the drive mode S2 for operation. The address mode S3 is displayed.
When the ENTER key of the operation key 162 is pressed in the address mode S3, a parameter communication address reference screen of S6 is displayed. When the display is changed to another parameter, the communication address S7 of the next parameter can be changed by pressing the increment key 162a or the decrement key 162b of the operation key 162. If it is desired to change the communication address of the parameter, the communication address data setting screen of S9 is displayed when the ENTER key of the operation key 162 is pressed while the parameter reference screen of S6 is displayed. Here, when the value of the communication address is set using the increment key 162a or the decrement key 162b, the communication address of the communication address storage unit 172 is set.
4 and the block diagram of FIG. 1 are related to the mode selection unit 163 that performs the processing of S1, S2, and S3, and the parameter setting unit 164 that performs the processing of S4 and S8. The communication address setting unit 165 performs the process of S9.

FIG. 5 is a diagram showing the relationship between the parameter number and the communication address when the communication address is set.
As shown in FIG. 5A, the first parameter number n001 is the communication address 100, but when it is set to the address 105 from the operation panel unit, it becomes like the part corresponding to n001 in FIG. 5B. Similarly, the parameter number n002 is set to the communication address 103, and n003 is set to 102, as shown in FIG. 5B.
FIG. 6 is a diagram illustrating a change in the communication address storage unit due to the setting of the communication address. Although initially stored as shown in FIG. 6A, when a communication address is set, it is stored as shown in FIG. 6B.
When the motor drive device 10 receives a parameter read / write command from the host communication device 50, the parameter extraction unit 18 extracts a parameter number from the commanded communication address with reference to the communication address storage unit 172, and the parameter The parameter setting value is read from and written to the storage unit 171.
In this way, the user can arbitrarily set the parameter communication address, and even when the motor drive device changes the parameter communication address due to an upgrade or the like, the parameter can be easily read and written from the host communication device.
Further, when reading a plurality of parameters whose communication addresses are not continuous, if the communication addresses are changed so as to be continuous, they can be read with one communication message, and communication efficiency is improved.

Next, a case where communication addresses are collectively changed using a template will be described.
The motor drive device 10 may have a communication address that differs greatly from the standard model depending on the motor drive device 10 due to the model or upgrade. Differences between various types of communication addresses from standard models are input in advance to the motor drive device 10 as templates. This difference is stored in the template storage unit 173 as a template communication address list.
Then, by setting a certain parameter as a template selection parameter and setting the parameter, the template setting unit 19 refers to the template storage unit 173 and sets the communication address to that of the template collectively.
FIG. 7 is a diagram for explaining setting of a communication address using a template.
FIG. 7A shows an example of parameters, and the template selection parameter is parameter number n100. FIG. 7B is a list of communication addresses stored in the template storage unit 173. When the value of the template selection parameter n100 is 0, the communication address list of the standard is 1 when the value is 1, and the communication address of the model B when the value is 2. FIG. 7C shows the contents developed in the communication address storage unit when model A is selected.
By setting the template number in the parameter n100, the template setting unit 19 in FIG. 1 collectively sets the communication address of the communication address storage unit 172 from the communication address list of the template storage unit 173.

FIG. 8 is a flowchart showing the processing procedure of the template setting unit 19.
In step S11, a determination is made to select the template model from the number of the parameter n100. Depending on the content of n100, the communication address of the corresponding model is selected in steps S12 to S14. The communication addresses of the communication address storage unit 172 are collectively set from the communication address list of the template model selected in step S15.
The parameter n100 may be set from the operation panel unit 16 or from the host communication device 50 by communication.
By using a template in this way, the user can change the communication address of the parameter arbitrarily using the template at the same time, and even if the motor drive device changes the communication address of the parameter due to upgrade etc., the parameter from the upper communication device Is easy to read and write.

FIG. 9 is a block diagram showing the configuration of the electric motor drive apparatus of the second embodiment of the present invention.
The difference from the first embodiment is that the reception communication address setting unit 20 is added to the control unit 11a and the communication address setting unit 165 shown in FIG. The external support device 60 is added.
In the second embodiment, the communication address is not set on the operation panel unit 16a, but is set by a message from the external support device 60.
The external support device 60 transmits a communication address setting message to the motor drive device 10, and analyzes and executes the message received by the reception communication address setting unit 20.
FIG. 10 is a flowchart showing a processing procedure of the reception communication address setting unit 20.
In step S21, a message is received from the external support device 60. In step S22, it is determined whether the message is a communication address setting. If the communication address is set, the communication address of the communication address storage unit 172 is set in step S23.
In this way, even if the standard operation panel is used, the user can arbitrarily set the parameter communication address from the external support device, and even if the motor drive device changes the parameter communication address due to upgrade etc. Parameters can be easily read and written from communication equipment.

The block diagram which shows the structure of the electric motor drive device of 1st Example of this invention. The figure which shows the correspondence table of the communication address and parameter number which are memorize | stored in the communication address memory | storage part The figure which shows an example of an operation panel part The figure which shows the operation flowchart of an operation panel part Diagram showing the relationship between parameter number and communication address when communication address is set The figure which shows the change of the communication address memory | storage part by having set the communication address Diagram explaining communication address setting by template The flowchart which shows the processing procedure of a template setting part The block diagram which shows the structure of the electric motor drive device of 2nd Example of this invention. Flowchart showing processing procedure of reception communication address setting unit The figure which shows the example of the parameter of the conventional electric motor drive device The figure which shows the example of the communication command message from the host communication equipment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electric motor drive device 11 and 11a Control part 12 Drive part 13 Communication part 14 CPU
15 Control unit 16, 16a Operation panel unit 161 Display unit 161a Data display unit 161b Mode display unit 162 Operation key 162a Increment key 162b Decrement key 163 Mode selection unit 164 Parameter setting unit 165 Communication address setting unit 17 Storage unit 171 Parameter storage unit 172 Communication address storage unit 173 Template storage unit 18 Parameter extraction unit 19 Template setting unit 20 Reception communication address setting unit 30 Motor 40 Communication network 50 Host communication device 60 External support device

Claims (3)

Connected to higher-level communication equipment via a communication network,
A control unit that performs calculation and communication of commands from the host communication device; and
It consists of a drive unit that outputs a drive command to the motor.
A communication unit that interfaces with the communication network in the control unit;
A CPU that performs arithmetic processing;
A control unit for performing motor control processing;
An operation panel unit that performs operation processing and display processing from operation keys,
In an electric motor drive device having a storage unit for storing parameters and the like,
The storage unit includes a communication address storage unit that stores a relationship between a communication address of the parameter and the parameter number,
The control unit includes a parameter extraction unit that extracts a parameter number as an input of a communication address of a parameter to be used when reading and writing parameters of the motor drive device from the host communication device,
An electric motor drive device comprising a communication address setting unit for setting a communication address of the parameter in the operation panel unit. Connected to the host communication device and the external support device via the communication network,
A control unit that performs calculation and communication of commands from the host communication device; and
It consists of a drive unit that outputs a drive command to the motor.
A communication unit that interfaces with the communication network in the control unit;
A CPU that performs arithmetic processing;
A control unit for performing motor control processing;
An operation panel unit that performs operation processing and display processing from operation keys,
In an electric motor drive device having a storage unit for storing parameters and the like,
The storage unit includes a communication address storage unit that stores a relationship between a communication address of the parameter and the parameter number,
A parameter extraction unit that extracts a parameter number as an input of a communication address of a parameter to be used when reading and writing parameters of the motor drive device from the host communication device to the control unit,
An electric motor drive device comprising: a reception communication address setting unit that sets a communication address of the parameter of the communication address storage unit by a communication address setting message from the external support device. The storage unit further includes a template storage unit that stores a difference between a standard model of the communication address of the parameter of various types of the motor drive device as a template,
The control unit further includes a template setting unit,
The template setting unit refers to the template storage unit according to a template selection parameter for selecting the template, and collectively changes the communication address of the parameter to that of the template. The electric motor drive device according to claim 2.

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