JPH10304671A - Inverter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inverter device which can use a common extension panel, even if the operating methods of a panel are different from each other owing to the difference in machine types or designation of a particular customer and whose input of all multifunctional functions can be controlled from an external device through communication or the like. SOLUTION: This inverter device has a control circuit part which controls an inverter circuit 2 for driving an electric motor 3, a first operational key 6 for setting the data of a control condition, a storage means for storing the data of the control condition, the first display means 10 which displays display data, based on the data of the storage means, a communication means 8 which conducts communication of the data with an external apparatus 11, a second operational key 13 which is formed to the external apparatus 11 and writes the data of the control condition in the storage means 39, and a second display means 14 which is formed to the external apparatus 11 and displays display data readout from the storage means. When the second operational key 13 is operated, input data from the first operational key 6 is switched to the input data from the second operational key 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter control device for performing variable speed control of a motor.

[0002]

2. Description of the Related Art Conventionally, an inverter device has been used in a control box together with other electric equipment. on the other hand,
The inverter device can change data of various control conditions according to the user's desire. Therefore, in order to change the data of the control condition after storing it in the control box,
In each case, the operation key was operated while opening the front door of the control box and watching the display of the inverter device body. However, opening and closing the front door every time the setting data is changed has been problematic in terms of work difficulty and safety. That is, there is a danger when the control box contains a high-voltage electric wire and comes into contact with the electric wire.

[0003] As a solution to this problem, there is a conventional one in which a combination of an operation key and a display attached to an inverter body is used as an extension panel, and the extension panel is attached to a front door of a control box. . In this case, the inside inverter can be operated from the outside of the control box without opening the front door, so that the safety is high.

However, heretofore, it has been necessary to prepare a plurality of types of extension panels according to the inverter.
In other words, the same extension panel can be used if the operation is the same, but if the operation method of the panel is different due to a difference in model or designation of a specific customer, or if the hardware such as the number of input keys is different, a new Extension panels needed to be developed.

[0005] In addition, the inverter device is multifunctional, and a multifunction is realized by assigning a specific function from among many functions to an input terminal. However, an effective mode of an input signal from an external device is controlled by communication or the like. Switching and performing input control only for specific functions.

[0006]

In the conventional inverter device with an extension panel, if the operation method of the panel or the hardware such as the number of input keys is different due to the difference of the model or the designation of a specific customer, the extension panel is individually provided. In addition, it was necessary to develop the software and the extension panel could not be commonly used.

Further, input of all multifunctional functions cannot be controlled from an external device through communication or the like. An object of the present invention is to provide an inverter device that can use the same extension panel even when a panel operation method is different due to a difference in a model or a specification of a specific customer.
It is still another object of the present invention to provide an inverter device capable of controlling the input of all multifunctional functions from an external device through communication or the like.

[0008]

An invar according to claim 1 is provided.
The control device includes a control circuit for controlling an inverter circuit for driving the electric motor, a first operation key for setting control condition data, and storage means for storing control condition data. First display means for displaying display data based on data in the storage means, communication means for communicating data with an external device, and writing of control condition data provided in the external device to the storage means. A second operation key provided on the external device for displaying display data read from the storage means, wherein the first operation key is operated when the second operation key is operated; The input data from the inverter is switched to the input data from the second operation key, and the method of operating the panel of the inverter is changed depending on the difference of the model of the inverter or the designation of a specific customer. The same extension Use Le is possible.

According to a second aspect of the present invention, there is provided an inverter device wherein the external device according to the first aspect is an extension panel. According to a third aspect of the present invention, there is provided an inverter device for controlling an inverter circuit for driving an electric motor, a terminal block having a plurality of terminals, and a first operation key for setting a control function for the terminals. Storage means for storing the settings; and display data based on the data in the storage means.
First display means for displaying data, communication means for communicating data with the external device, second operation keys provided on the external device for writing settings to the storage means, and storage means provided on the external device. Second display means for displaying the read-out display data, and the first operation key is operated when the second operation key is operated.
The setting from the operation key is switched to the setting from the second operation key. For example, when the command selection is a terminal and the terminal command switching is an external terminal signal input, the eight input terminals are, for example, By selecting from 60 functions and assigning the functions, and setting the signal ON / OFF data of the assigned eight functions, the input of all the multi-functions can be controlled from an external device by communication. .

According to a fourth aspect of the present invention, in the inverter device according to the first aspect, when there is no input data from the external device for a predetermined period of time, the input data from the external device is transmitted to the first operation key. In the external key input mode, a means for turning off the external input mode when there is no key input for a certain period of time is provided, so that a communication cable or the like is disconnected. In such a case, the key input is automatically returned to the panel input of the main body, so that either key input is always valid, and a highly safe inverter device can be provided.

According to a fifth aspect of the present invention, the input data from the external device according to the first aspect includes a key input state and a state continuation time. Includes the key input state and the state continuation time, the same processing as the actual panel processing of the inverter device, such as updating of display data by continuous key pressing, can be realized by key input of the extension panel.

[0012]

FIG. 1 shows a first embodiment of the present invention.
It will be described based on. The inverter control device 1 controls the speed of the motor 3 attached to the output side of the inverter main circuit 2 by controlling the inverter main circuit 2. A power supply 4 is connected to the input side of the inverter main circuit 2. The inverter control device 1 controls the inverter main circuit 2 according to software stored in a ROM in a CPU (microcomputer) 5. An operation key 6 provided on the inverter control device 1 is for setting data of control conditions of the inverter control device 1. When the user operates the operation key 6, the setting data is set. Are stored in the built-in key input command memory 7. further,
The inverter control device 1 is provided with communication means 8 for communicating with external devices. The CPU 5 controls the inverter main circuit 2, creates panel display data, writes the display data to the internal memory 9, and simultaneously displays the display data on the display 10. Therefore, the user can use the display 10
By operating the operation key 6, the user can set the data of the control condition while watching.

The extension panel 11, which is one of the external devices, has its own CPU 12, operation keys 13, a display 14, and communication means 15. When the extension panel 11 is connected to the inverter control device 1, the operation key 13 of the extension panel 11 is operated to display the data of the control conditions of the inverter control device 1 on the display 14. While doing. CPU1
Reference numeral 2 reads out the display data written in the internal memory 9 via the communication means 8 and 15, and displays it on the display 14. Thus, the same display as the display 10 of the inverter control device 1 can be performed on the display 14. Operation key 13
Is operated, the extension panel 11 writes a command of “external key input” into the key input switching command memory 16 of the inverter control device 1, and then the extension panel 1
The key input 1 is written into the external key input command memory 17 of the inverter control device 1 as a "key input" command. On the other hand, the inverter control device 1 reads the contents of the key input switching command memory 16 as needed, and when the command is “built-in key input”, reads the key input command from the built-in key input command memory 7, and outputs the command “ In the case of "external key input", a key input command is read from the external key input command memory 17, key input processing is performed, and display data is created.

Thus, the extension panel 11 can write the control condition data in the inverter control device 1 and display the panel display data regardless of the panel operation of the inverter control device 1.

Next, the operation of the inverter control device 1 and the extension panel 11 configured as described above will be described with reference to the flowchart of FIG. According to the flowchart of the extension panel 11 shown in FIG. 2A, the CPU 12 performs an initialization process of a built-in memory and the like (step S1), and then the internal memory 9 of the inverter control device 1. Then, the display data is read out and displayed on the display 14 of the extension panel 11 (step S2). Next, the CPU 11 checks the input data by the operation keys 13 (step S3), and writes an "external key input" command into the key input switching command memory 16 of the inverter control device 1 (step S4). ), Operation key
13 for external key input command memory 17
(Step S5). The extension panel 11 repeats the operation from step S2 to step S5.
On the other hand, the operation of the inverter control device 1 is as shown in the flowchart of FIG. First, the CPU 5 performs initialization processing of each memory and the like (step S6), and then creates data to be displayed on the display 10 (step S7). Next, the key input switching command memory 16
Is read and a key input mode check is performed (step S8). As a result of performing the read key input mode check, step S9 is executed after step S8 in the case of the internal key and step S10 in the case of the external key.
In step S9, key data of the operation key 6 in the built-in key input command memory 7 is input. Step S
At 10, the key data of the operation key 13 of the extension panel 11 in the external key input command memory 17 is input. Finally, step S11 is executed, and the CPU 5 performs the processing of the input key data and executes the control based on the key data. The inverter control device 1 repeats the above-described operations from step S6 to step S11.

Next, the above embodiment will be described in more detail with reference to the drawings. First, the overall configuration will be described with reference to FIGS. As shown in FIG. 3, the inverter main circuit 2 includes power supply terminals 18, 19, and 20 and load terminals 21, 22, and 23. The power supply terminals 18, 19, and 20 include a three-phase AC power supply , And a motor, for example, a three-phase induction motor 3 is connected to the load terminals 21, 22 and 23.

The inverter main circuit 2 includes a DC power supply circuit 24. The DC power supply circuit 24 includes a full-wave rectifier circuit 25 having an AC input terminal connected to the power supply side terminals 18, 19, and 20, and a smoothing capacitor 26 connected between the DC output terminals of the full-wave rectifier circuit 25. Composed of
DC buses 27, 2 are connected to both terminals of the smoothing capacitor 26.
8 are connected. Further, an inverter 35 is connected between the DC buses 27 and 28 by connecting three transistors 29 to 34 as three switching elements in a three-phase bridge. The emitters of the transistors 29 to 34 are connected to the load terminals 21 and 22, respectively. 23. The six output terminals of the base drive circuit 36 are connected to the bases of the transistors 29 to 34 of the inverter unit 35, respectively.

Further, the inverter main circuit 2 has a control power supply circuit 37, and its input terminal is connected to the DC bus 27,
8 to output a control power supply voltage VCC of a constant DC voltage between output terminals. In this case, in the control power supply circuit 37, VCC indicates the control power supply voltage, and E indicates the ground potential.

The inverter control device 1 has a microcomputer 5. The microcomputer (hereinafter abbreviated as CPU) 5 has a built-in ROM 38 and a built-in RAM 39 for storing a program for instructing its own operation, and a data bus and an address bus are provided with various memories such as a rewritable non-volatile memory. Connected to the memory 9. The output port of the CPU 5 is connected to the base drive circuit 36, and controls the switching of the transistors 29 to 34, which are switching elements, to control the rotation of the induction motor 3.

The inverter controller 1 is all managed by the CPU 5 and executes control in accordance with the data in the built-in RAM 39. Here, the built-in RAM 39 has the above-mentioned internal memory 9, memory 16 for key input switching command, memory 17 for external key input command, and memory 7 for built-in key input command.

The control condition data of the built-in RAM 39 is stored in a readable and writable nonvolatile memory 9 for storing current setting data, and is transferred to the built-in RAM 39 at the time of initialization. Further, the serial port of the CPU 5 is connected to the connector 40 via the transmission / reception circuit 8 which is a communication means, and is connected to an external device such as the extension panel 11 shown in FIG.

The inverter control device 1 further includes a power supply monitoring circuit 41. The power supply monitoring circuit 41 has an input terminal connected to the output terminal of the control power supply circuit 37 and an output terminal connected to the input port of the CPU 5, and operates until the control power supply voltage Vcc from the control power supply circuit 37 reaches the set level. Is to reset the CPU 5 (power-on reset).

Further, the inverter control device 1 includes a terminal block 4
2 is provided. In the terminal block 42, a plurality of terminals, for example, eight terminals are connected to an input port of the CPU 5 via a buffer 43, and one or more terminals, for example, two analog input terminals are connected via an A / D converter 44. CPU
5 input ports, and a plurality of terminals such as 4
A terminal is connected to an output port of the CPU 5 via a buffer 45, and one or more terminals, for example, two terminals are connected to an analog output of the CPU 5 via a low-pass filter circuit 46. It is connected to an external operating device (not shown).

The panel (setting operation section) includes a key input circuit 6 for setting operation, and these input terminals are connected to a CPU.
5 input ports. In addition, a data and operation status display LED 10 is provided as a display, and these are connected to an output port of the CPU 5 via driver circuits 47 and 48.

FIG. 4 shows an extension panel connected to the inverter device of FIG. Microcomputer (hereafter CPU)
12) has a built-in ROM 49 and a built-in RAM 50 for storing a program for instructing the operation of the CPU. The control circuits are all managed by the CPU 12 and execute control according to data in the built-in RAM 50. CPU 12
Serial port is connected to the connector 5 via the transmission / reception circuit 15.
1 and connected to the inverter device shown in FIG. The connector 51 is electrically connected to the connector 40 of FIG.

The extension panel 11 further includes a power supply monitoring circuit 52
It has. The power supply monitoring circuit 52 has an input terminal connected to the output terminal of the control power supply circuit 37 of the inverter device shown in FIG. 3 and an output terminal connected to the input port of the CPU 12. Vc
Until c reaches the set level, the CPU 12 is reset (power-on reset).
The panel (setting operation section) is a key input circuit 1 for setting operation.
3 and these input terminals are connected to input ports of the CPU 12. Further, an LED 14 for displaying data and operation status is provided as a display, and these are connected to an output port of the CPU 12 via driver circuits 53 and 54.

Next, the invar having the above-described configuration will be described.
The operation of the monitoring device will be described. First, 3 of the device in FIG.
The phase AC power supply 4 is turned on and the control power supply circuit 37 inverts the power.
When the DC power supply VCC is supplied to the data controller 1, the CPU 5
Starts the operation according to the program stored in the built-in ROM 38, and first clears the data in the built-in RAM 39 to initialize it. After this initialization, the control condition data stored in the nonvolatile memory 9 is read out, and the internal RAM 3 is read.
Write 9 Various condition data set in advance are set in the control condition data.

A DC power supply VCC from the control power supply circuit 37
Is also supplied from the connector 40 to the control circuit of the extension panel 11 via the connector 51 of FIG. After the DC power is supplied, the CPU 12 of the extension panel 11
The operation is started by the program stored in.

The inverter control device 1 receives and processes the communication text data from the extension panel 11 according to the program according to the procedure, creates and returns the communication text data. Also, panel display data is created, and the display data is stored in a predetermined address (for example, communication number 80) in the built-in RAM 39.
0 to 804 (see FIG. 5), and at the same time, is displayed on the display LED 6 in accordance with the display data.

The inverter control device 1 further includes a built-in R
The command mode selection data (for example, communication number 1, see FIG. 5) in the AM 39 is read out. When the data is 0, the panel input command is valid, and when it is 1, the terminal input command is valid. When the panel input command is valid, the data in the key input switching command memory 16 (for example, the communication number 90
The contents of the address indicated by 0 (see FIG. 5) are read out, and when the data for the switching command is 0, that is, “internal key input”, the internal key input command memory
When the data for the switching command is 1, that is, "external key input", the data of the external key input command memory 17 in the built-in RAM 39 (for example, the communication number 9).
The data for the key input command is read from the address indicated by “01”), key input processing is performed, and display data is created.

Here, the case of connecting to an external device such as an extension panel will be described. CPU 12 of extension panel 11
Starts operation according to a program stored in the built-in ROM 49 by the power supplied from the inverter control device 1. The extension panel 11 reads out display data (for example, data written at the address indicated by the communication number 800) in the internal memory 39 of the inverter control device 1 via the transmission / reception circuits 8 and 15, and reads the display 14 of the extension panel 11. , The same display as the display 10 of the inverter control device 1 is performed. The extension panel 11 writes an "external key input" command in the key input switching command memory 16 in the built-in RAM 39 of the inverter control device 1, and then inputs the key input by the operation keys 13 of the extension panel 11 to "key input". The command is written into the external key input command memory 17 in the built-in RAM 39 of the inverter control device as a command. The inverter control device 1 reads the data in the key input switching command memory 16 in the built-in RAM 39, and since the data is “external key input”, the built-in R
The key input command is read from the data of the external key input command memory 17 in the AM 39, key input processing is performed, and display data is created.

In this way, the extension panel 11 can directly write the data of the control conditions in the inverter control device 1, and the same display as the display 10 of the inverter control device 1 can be performed on the display 14 of the extension panel 11. Can be.

According to this embodiment, the control circuit for controlling the inverter circuit for driving the electric motor, the key input unit and the display unit of the panel for setting the data of the control condition, and the communication means for communicating with the external equipment are provided. The inverter device provided with a means for outputting display data to the outside and a means for switching the input from the switch unit of the panel to an external input. An inverter device that can use the same extension panel even when the operation method of the panel of the device is different can be provided.

The peripheral device has means for reading display data from the inverter device, means for writing key input data to the inverter, and means for displaying the display data read from the inverter as it is. Thus, the same panel operation / processing method as that of the inverter device can be realized regardless of the panel operation / processing method of the inverter device body.

A second embodiment will be described with reference to FIG. The terminal block 42 is provided in the inverter control device 1 as described above. The terminal block 42 is used to select and register a desired control function from the dozens of control functions of the inverter control device 1 on the user side. That is, for example, if the inverter control device 1 has 60 kinds of control functions, the user selects up to eight desired control functions from the 60 kinds of control functions, and The selected control function is assigned to each of the eight terminals and registered. After the registration is completed, the registered control function can be executed by setting ON / OFF data for each terminal. The on / off data setting method for the terminal can be performed by turning on / off the terminal switch, or by setting on / off data from an external device to the terminal via the communication means. You can also.

The inverter control circuit 1 reads the command mode selection data in the built-in RAM 39, and the data is 1
In the case of, the terminal input command is valid. When the terminal input command becomes valid, the data in the terminal input switching command memory 55 is read, and it is determined whether the input is an external terminal signal input or a built-in terminal input.

An external device (personal computer) 58 connected to the inverter control device 1 stores a "terminal signal input from external device" in the terminal signal input switching command memory 55 of the inverter control device 1. Write the command,
Next, a terminal signal input from an external device is transmitted to the inverter controller 1.
To the external terminal signal input command memory 56.
The inverter control device 1 reads the data of the terminal signal input switching command memory 55, and when the command is "internal terminal signal input", the internal terminal signal input command memory 5
7, the terminal signal input command is read from the external terminal signal input command memory 56, and the terminal signal input processing is performed when the command is "external terminal signal input". By this operation, by inputting terminal signal input data of the control function assigned to the terminal input of the inverter control device 1 from the external device, the signal input of all the functions of the inverter control device 1 can be input with limited data. Can be.

When the terminal input command is valid, for example, the data in the terminal input switching command memory 55 at the address indicated by the communication number 910 is read, and when the switching command data is 0, that is, when "internal terminal signal input", the internal RAM 39 is read.
When the data for the switching command is 1 from the data for the internal terminal signal input command of
For example, external terminal signal input command data is read from the external terminal signal input command data at the address indicated by the communication number 911 in the internal RAM 39, and terminal input processing is performed.

Further, when the command selection is a terminal and the terminal command switching is an external terminal signal input, a plurality of input terminals are selected from a plurality of multifunctional functions and assigned a function.
By setting the signal on / off data of the assigned function, all the functions prepared for the input terminal can be easily realized even from the communication. A third embodiment will be described.

In this embodiment, the key input data by the operation keys is composed of the key input state and the duration of the state, so that the processing differs depending on the continuous key input time or the time interval of the key input data inside the main body. Even when the time interval between key input data from outside due to communication and the like is different, panel operation equivalent to that of the main body panel can be realized by the external panel by setting the duration.

Further, since the key input data is composed of the key input state and the duration of the state, even if the processing differs depending on the continuous key input time, the time interval of the key input data inside the main body and the external time by communication or the like. Even if the time interval of the key input data is different, the panel operation equivalent to the main body panel can be realized by the external panel by setting the duration.

Next, a fourth embodiment will be described. In the external key input mode, if there is no key input for a certain period of time, there is a means to turn off the external input mode. Input is always valid.

In the external key input mode, a means for turning off the external input mode when there is no key input for a certain period of time is provided. Such key input is always effective, and a highly safe inverter device can be realized.

Next, a fifth embodiment will be described. Even when the number of keys is different, for example, when the inverter has 4 keys and the extension panel has 6 keys, 4 keys of the 6 keys on the extension panel correspond to the inverter body keys as they are, and the remaining 2 keys are unused Can be used as an extension panel.

Even when the number of keys is different, for example, when the inverter main body has four keys and the extension panel has six keys, four of the six keys on the extension panel side correspond to the inverter main body keys as they are, and the remaining keys are the same. The 2 key can be used as an extension panel only by leaving it unused, and a standard extension panel having the same operability can be realized even when hardware is different.

[0046]

As is apparent from the above description, the inverter of the present invention has the following effects. According to the first aspect and the second aspect, the same extension panel can be used even when the method of operating the panel of the inverter device is different due to a difference in the type of the inverter device or designation of a specific customer. It is possible to provide a simple inverter device. In addition, it has a means for reading display data from the inverter device, a means for writing key input data to the inverter, and a means for displaying the display data read from the inverter as it is. Even if the method of operating the panel of the inverter device differs according to the above designation, it is possible to provide an extension panel that can be used for each inverter device.

According to the third aspect of the present invention, since the means for giving an external input is a means using a communication function, for example, when the command selection is a terminal and the terminal command switching is an external terminal signal input, eight means are used. Input terminal is, for example, 6
By assigning functions by selecting from 0 functions, and setting the signal ON / OFF data of the assigned 8 functions,
It is possible to provide an inverter device capable of controlling the input of all multifunctional functions from an external device through communication. According to the means of claim 4, the means for giving an external input uses a communication function, and in the external key input mode, when there is no key input for a predetermined time, the external input mode is turned off. Therefore, when the communication cable or the like is disconnected, the operation automatically returns to the main panel input, so that either key input is always valid, and a highly safe inverter device can be provided. Claim 5
According to the described means, further, since the key input data from the outside includes the key input state and the state duration,
The same processing as the actual panel processing of the inverter device, such as updating of display data by continuous pressing of keys, can be realized by key input of the extension panel.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation in the first embodiment of the present invention.
Chart

FIG. 3 is a block diagram of an inverter control device according to a first embodiment of the present invention.

FIG. 4 is a block diagram of an extension panel according to the first embodiment of the present invention.

FIG. 5 is a diagram showing an example of data to be read or written from an external device according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing a second embodiment of the present invention.

[Explanation of symbols]

1 is an inverter control device, 2 is an inverter main circuit, 5 is a microcomputer, 6 is an operation key, 7 is a memory for a built-in key input command, 8 is a communication means, 9 is an internal memory,
10 is a display, 11 is an extension panel, 12 is a microcomputer, 13 is an operation key, 14 is a display, 15 is communication means, 16 is a key input switching command memory, and 17 is an external key input command. Reference numeral 42 denotes a terminal block, 55 denotes a terminal signal input switching command memory, 56 denotes an external terminal signal input command memory, 57 denotes a built-in terminal signal input command memory, and 58 denotes a personal computer.

Claims (5)

[Claims] A control circuit for controlling an inverter circuit for driving an electric motor; a first operation key for setting control condition data; and storage means for storing the control condition data. First display means for displaying display data based on the data in the storage means, communication means for communicating data with an external device, and data of the control condition provided in the external device. A second operation key to be written into the storage means; and a second display means provided on the external device for displaying display data read from the storage means, wherein the second operation key is operated. In some cases, the input data from the first operation key is switched to the input data from the second operation key. 2. The inverter device according to claim 1, wherein said external device is an extension panel. 3. A control circuit for controlling an inverter circuit for driving an electric motor, a terminal block having a plurality of terminals, a first operation key for setting a control function for the terminals, and Storage means for storing, first display means for displaying display data based on the data in the storage means, communication means for communicating data with an external device, and the external device. A second operation key for writing the setting into the storage means, and a second display means provided on the external device for displaying display data read from the storage means, wherein the second operation key is provided. Wherein the setting from the first operation key is switched to the setting from the second operation key when is operated. 4. The switching means, if there is no input data from the external device for a predetermined time, input data from the external device.
2. The inverter device according to claim 1, wherein data is switched to input data from said first operation key. 5. The inverter device according to claim 1, wherein the input data from the external device includes a key input state and a state duration time.