JP2683962B2 - Inverter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device, and more particularly to a device for investigating a cause of inoperability in an inverter control device.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram showing a conventional inverter device. In the figure, reference numeral 1 is a commercial AC power supply, 2 is an inverter main circuit section that once converts the AC of the commercial AC power supply 1 into a DC voltage, and then again converts the AC into a variable frequency AC and a variable voltage AC, and outputs 3 The inverter control device is composed of a microprocessor for driving and controlling the unit 2, and has an inverter control circuit 4 composed of a CPU, a drive command circuit 5, and a memory 6 for storing various commands.
Reference numeral 7 is a motor that is a load, 8 is an inverter command device that gives various operation commands to the inverter control device 3,
It has an operation key 9 for issuing a driving command, a motor command, etc. and a 7-segment display 8a for displaying data such as a driving command. Reference numeral 11 denotes an inverter device including an inverter main circuit unit 2, an inverter control device 3, and an inverter command device 8.

Next, the operation of the conventional inverter device will be described. The inverter control device 3 drives and controls the inverter main circuit 2 based on the operation command given by the inverter command device 8, and the motor 7 is rotationally controlled by a predetermined frequency and voltage. However, the inverter device 1
1 may become inoperable, and when the user determines that the operation is impossible and investigates the cause, the user estimates the content of the operation command that can make the operation impossible, and the inverter command device 8 Among the operation keys 9 of, the key for reading the estimated operation command is operated. Then, the inverter command device 8 communicates with the inverter control circuit 4 of the inverter control device 3 to read the data of the memory 6 storing the operation command and display the data on the display 8a.

The user looks at the numerical values of the data and examines one by one whether or not the value is an inoperable value, and examines the cause of the inoperable value. That is, the operation command contents include, for example, the set frequency, the command frequency, the starting frequency, the upper limit frequency, the normal rotation operation and the reverse rotation operation, and when the motor 7 cannot rotate at the set frequency of the operation instruction and cannot be operated,
Since the set frequency according to the operation command is not stored in the memory 6 which stores the operation command, whether or not the operation command is the cause of the inoperability can be determined by reading the data and looking at the numerical value. I can judge. When the cause of the inoperability is other than the set frequency, the data that may cause other causes are read out one after another and the causes of the inoperability based on the other operation commands are sequentially investigated.

[0005]

In the conventional inverter device as described above, since the inverter command device 8 has only the operation key 9 having the key for issuing the operation command and the key for reading the cause of the inoperability, Inverter device 11
When driving is impossible and the cause is to be investigated, the user estimates the content of the driving command that can make driving impossible,
By operating the key of the operation key 9 for reading out the estimated operation command, the data is read from the memory 6 storing various operation commands by communicating with the inverter control circuit 4 of the inverter control device 3, and the data is displayed on the display 10. It is necessary to display and display the driving instructions one by one to check what is causing the driving inability.It takes time to find out the cause of the driving inability. There was a problem that it was not possible to investigate the possible cause.

The present invention has been made to solve the above problems, and an object thereof is to obtain an inverter device in which the cause of the inoperability of the inverter device can be easily understood.

[0007]

An inverter device according to the present invention includes an inverter main circuit section for converting a DC voltage into a variable frequency and a variable voltage AC, an inverter control apparatus for driving and controlling the inverter main circuit section, and an inverter. An inverter command device that gives various operation commands to the control device, wherein the inverter control device has a memory that stores various operation commands of the inverter command device, and the inverter command device displays a display indicating the cause of inoperability. An inverter control device having a controller, a program memory for storing a program for automatically investigating the cause of inoperability, and a memory for storing the various operation commands based on the program of the program memory according to a cause investigation request command. Communicates and searches for operation commands, and sequentially determines whether or not it is the cause of inoperability Is configured to have a cause investigation circuit for displaying the investigation has been operated not cause the indicator.

Further, in another inverter device, the inverter command device has a display for displaying the cause of inoperability, the inverter control device stores a memory for storing various operation commands of the inverter command device, and an operation failure. A program memory that stores a program that automatically investigates possible causes and a memory that stores the various operation commands based on the program in the program memory according to the cause investigation request command from the inverter command device reads the operation content Then, it is configured to have a cause investigating circuit for sequentially judging whether or not the cause is an inoperable cause and displaying the determined inoperable cause on the display.

[0009]

In the present invention, when the user determines that the inverter device cannot operate, when the inverter command device issues a command for investigating the cause, the cause command circuit of the inverter command device is stored in the program memory. Based on a program that investigates the cause of inoperability, it communicates with the memory that stores various operation commands of the inverter control device and retrieves various operation commands one after another, which causes the inoperability. Whether or not it is present is sequentially determined, and the cause of inoperability that has been determined is displayed on the display.

Further, by providing the inverter control device with a program memory for storing a program for investigating the cause of inoperability, and a cause investigating circuit for investigating the cause of inoperability based on the program, the inverter command device is provided. Only by issuing a cause investigation request command, the cause of inoperability is sequentially investigated in the inverter control unit.Therefore, the inverter command unit and the inverter control unit communicate repeatedly to find out the cause of inoperability. You no longer need to do. Furthermore, by providing a program memory in the inverter control device, it is sufficient to replace the program memory itself with changes in the specifications of the inverter device.

[0011]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG.
FIG. 3 is a block diagram showing a signal flow in an inverter command device and an inverter control device according to the same embodiment. In the figure, the same configurations as those of the conventional example are denoted by the same reference numerals, and the description of the duplicated configurations will be omitted. Reference numeral 10 is a liquid crystal display provided in the inverter control device 8, 12 is a cause investigation circuit provided in the inverter command device 8 for investigating the cause of inoperability, 1
Reference numeral 3 is a ROM provided in the inverter command device 8 as a program memory for storing a program for automatically investigating the cause of inoperability.

Next, the operation of the above embodiment will be described. First, the outline of the operation will be described with reference to FIG. When the user determines that the inverter device 11 has become inoperable and investigates the cause, the operator operates the operation key 9 of the inverter command device 8 to input a cause investigation request command. In response to this command, the cause investigating circuit 12 of the inverter command device 8 investigates the cause of the inoperability based on various operation commands of the inverter device 11. First, the liquid crystal display 10 displays the display 10a under investigation. Next, the cause investigation circuit 12 communicates with the memory 6 for storing various operation commands provided in the inverter control circuit 4 based on the program stored in the ROM 13, and determines the cause of inoperability based on the operation command 12b. Then, the content of the determined inoperable cause is displayed 10b on the liquid crystal display 10.

Next, the detailed processing operation of the above embodiment will be described with reference to FIG.
A description will be given based on the flowchart of FIG. It should be noted that the flow chart shows only the part related to the investigation of the cause of the inoperability. First, the cause investigating circuit 12 determines whether or not there is a cause investigating request command for investigating the cause of inoperability (step S10). If there is no such command, the ROM is determined.
The process of the program for investigating the inoperable factor stored in 13 is not executed, and the process proceeds to another process. If there is such a command, processing based on the program of ROM 13
First, an indication that the cause is being investigated is displayed on the liquid crystal display 10 (step S11).

Next, among the contents in which some of the causative matters, that is, the causes of inoperability based on the driving command are preliminarily estimated and numbered, those for investigating the cause of No. 1 are estimated cause No. 1 (Step S12).
Then, the content of the operation command corresponding to the cause of the presumed cause number 1 is communicated with the memory 6 of the inverter control device 3 and read (step S13), and the state of the inverter device 11 cannot be operated because of the presumed cause number 1. It is determined whether or not (step S14). For example,
If the content of the probable cause number 1 is that the set frequency for driving is not set, the communication for reading the set frequency currently set in the memory 6 is performed in the memory 6.
If the result is 0 Hz, it is determined that the content of the probable cause number 1 is the cause of inoperability based on the operation command. If it is determined that the probable cause number 1 is not the inoperable factor as a result of the determination, 1 is added to the probable cause number 1 (step S15), and the probable cause number 2 is set in the same manner as described above. For example, it is checked whether or not the upper limit frequency, which is the content of the operation command, causes the operation to be impossible. If the checked content is the cause of the inoperability, the content of the inoperability cause is displayed in characters on the liquid crystal display 10 (step S16), and the program of the ROM 13 is terminated. When there are two or more causes of inoperability, the contents of the cause of inoperability are sequentially displayed on the liquid crystal display 10.

A liquid crystal display procedure associated with such an operation will be described with reference to the block diagram of FIG. When the cause investigation command of the inoperable cause is input to the cause investigation circuit 12 (step S20), the liquid crystal display 10 first displays "cause investigation" (step S21), and the cause investigation circuit 12 is also conducting the cause investigation. "Cause investigation" is displayed (step S2
2) When the cause is investigated and determined, the liquid crystal display 10 displays the content of the cause of inoperability, for example, "no frequency setting".

In this way, when the user judges that the inverter device 11 has become inoperable and investigates the cause, if the cause investigation request command is input to the inverter command device 8, the inverter command device 8 will not operate. By communicating with the inverter control unit 3 based on the program for investigating the possible cause, the inoperable cause based on various operation commands is automatically and sequentially investigated, and the content of the determined inoperable cause is displayed on the liquid crystal display 10. Since it is displayed with, there is no need for the user to think about the cause of inoperability and check the contents of the set operation command one by one to find out the cause of inoperability as in the past. It was In addition, the liquid crystal display 1
Since the content of the cause of inoperability is displayed at 0, the user does not have to be uncertain about the result of the investigation, and the investigation time is shortened compared to the conventional case.

FIG. 5 is a block diagram showing another embodiment of the present invention, and FIG. 6 is a block diagram showing signal flows in the inverter command device and the inverter control device according to the embodiment. In the figure, the same components as those of the conventional example are denoted by the same reference numerals, and the description of the duplicated components will be omitted. Reference numeral 6 is a program memory externally connected to the inverter control device 3 for storing a program for automatically investigating the cause of the inoperability, 1
Reference numeral 4 is a CPU of the inverter command device 8, 15 is a cause investigation circuit provided in the inverter control device 3 for investigating the cause of inoperability, and 16 is an EEPROM for storing various operation commands.
It is. An external terminal 17 receives an external signal.

Next, the operation of the above embodiment will be described. First, the outline of the operation will be described with reference to FIG. When the user determines that the inverter device 11 has become inoperable and investigates the cause, the operation key 9 of the inverter command device 8 is operated to input a cause investigation request command, and C
It is transmitted to the cause investigation circuit 15 of the inverter control device 14 by the PU 14. At this time, in the inverter command device 8, the CPU 14 displays on the liquid crystal display 10 a display 10a indicating that the cause has been investigated, based on this cause investigation request command. Further, in the inverter control device 3, the cause investigating circuit 15 which has received the cause investigating request command inputs the state of the external terminal 17 in order to investigate the cause of the inoperability based on various operation commands, and the memory 6
EEP storing various operation commands provided in the inverter control device 4 based on the program stored in
Communicates with the ROM 16 to read out each operation command,
The inoperable cause is determined based on the operation command, transmitted 15b to the CPU 14 of the inverter instruction device 8, and the CPU 14 having received the inoperable cause 14b displays 10b the content of the inoperable cause on the liquid crystal display 10.

Next, the detailed processing operation of the above embodiment will be described with reference to FIG.
A description will be given based on the flowchart of FIG. It should be noted that the flow chart shows only the part related to the investigation of the cause of the inoperability. First, the CPU 14 determines whether or not there is a cause investigation request command for investigating the cause of inoperability (step S30). If there is no such command, the process of the program for investigating the cause of inoperability is not executed, Go to other processing. If there is such a command, processing based on the program is performed, but first, an indication that the cause is being investigated is displayed on the liquid crystal display 10 (step S31).

Next, the CPU 14 of the inverter command device 8
Transmits a cause investigation request command to the cause investigation circuit 15 of the inverter control device 3 (step S32). On the side of the inverter control device 3, the cause investigation circuit 15 judges whether or not there is a cause investigation request command from the inverter command device 8 (step S35). If not, this process is not performed and the process proceeds to another process.

If there is a cause request command, the cause item,
That is, of the contents in which the number of inoperable causes based on the operation command are preliminarily estimated and numbered, the cause for the number 1 is set as the estimated cause number 1 (step S36). Then, the state of the external terminal 17 and the content of the operation command for the cause of the presumed cause number 1 are EE
The PROM 16 is communicated with and read out to check (step S37), and it is determined whether or not the state of the inverter device 11 is inoperable due to the probable cause number 1 (step S38). For example, probable cause number 1
If the content is not set to the set frequency for driving, the f command input to the external terminal 17 is detected, or the EEPROM 16 performs communication to read the set frequency currently set in the EEPROM 16. ,
If the result is 0 Hz, it is determined that the content of the probable cause number 1 is the inoperable cause. When it is determined that the probable cause number 1 is not the inoperable factor as a result of the determination, 1 is added to the probable cause number 1 (step S36), and the probable cause number 2 is set in the same manner as described above. For example, it is checked whether or not the upper limit frequency of the operation command content is the cause of the inoperability.

If the checked content is the cause of the inoperability, the cause investigating circuit 15 transmits the cause of the inoperability to the inverter command device 8 (step S40). The CPU 14 receives the inoperable cause (step S33), and the CPU 14 causes the liquid crystal display 10 to display the content of the inoperable cause in characters (step S3).
4), the program ends. When there are two or more causes of inoperability, the contents of the cause of inoperability are sequentially displayed on the liquid crystal display 10.

In this embodiment, the program for investigating the cause, which is stored in the ROM, is also given to the control unit, so that R
There is no longer a shortage of capacity on the command device side with a small OM capacity. Further, the program has to be changed in response to the change in the specifications of the inverter device 11, but in the embodiment shown in FIG. 1, it has to be changed for each inverter command device 8 having the ROM 13, which is troublesome and costly. However, in the present embodiment, the program memory for storing the program is provided on the control device side. Therefore, when the specifications of the inverter control device 3 are changed, the investigation program may be changed at the same time. Therefore, the inverter command device 8 needs to be changed. Therefore, the program can be easily changed, and the program memory itself can be easily changed. Further, in the present embodiment, the cause investigating circuit 15 is provided in the inverter control device 3, so that when the causes of inoperability are sequentially investigated based on the operation command, the inverter command as in the embodiment shown in FIG. It is not necessary to repeatedly communicate between the device 8 and the inverter control device 3, and the time taken to investigate the cause is short.

[0024]

As described above, according to the present invention, when the cause determination request command is issued by the inverter command device, the cause determination circuit of the inverter command device determines the inoperable cause of the program memory based on the program. It communicates with the memory that stores the various operation commands of the above, searches for various operation commands one after another, and sequentially judges whether or not it is the cause of the operation inability. Since it is displayed on the display, when the user determines that the inverter device has become inoperable, the user considers the cause and checks the cause of inoperability one by one based on the set operation command contents. There is no need to do the work, and as a result of the user's investigation, it is no longer difficult to understand, and the time to investigate the cause can be shortened. That.

Further, since the inverter control device is provided with a program memory for storing a program for investigating the cause of inoperability, and a cause investigating circuit for investigating the cause of inoperability based on the program, the inverter command The device sequentially determines the cause of inoperability within the inverter control device by simply issuing a cause investigation request command.Therefore, the device cannot be operated repeatedly between the inverter command device and the inverter control device to investigate the cause of inoperability. Need not communicate,
This has the effect of shortening the time for investigating the cause.

Further, by providing a program memory in the inverter control device, it is sufficient to replace the program memory itself on the control device side with respect to changes in the specifications of the inverter device, and by changing the specifications of the inverter device, the program on the command device side is changed. This has an effect that the memory can be easily handled without causing a capacity shortage.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing a signal flow in an inverter command device and an inverter control device according to the embodiment.

FIG. 3 is a flow chart showing an operation for investigating the cause of operation failure in the embodiment.

FIG. 4 is a block diagram showing a flow of display in the inverter command device according to the embodiment.

FIG. 5 is a configuration diagram showing another embodiment of the present invention.

FIG. 6 is a block diagram showing a signal flow in the inverter command device and the inverter control device according to the embodiment.

FIG. 7 is a flow chart showing an operation for investigating the cause of operation failure in the embodiment.

FIG. 8 is a configuration diagram showing a conventional inverter device.

[Explanation of symbols]

 2 Inverter main circuit part 3 Inverter control device 4 Inverter control circuit 5 Drive command circuit 7 Motor 8 Inverter command device 10 Liquid crystal display 12 Cause investigation circuit 13 ROM (program memory)

Claims (2)

(57) [Claims] 1. An inverter main circuit unit for converting a DC voltage into a variable frequency and variable voltage AC, an inverter control device for driving and controlling the inverter main circuit unit, and an inverter command for giving various operation commands to the inverter control device. The inverter control device has a memory for storing various operation commands of the inverter command device, and the inverter command device automatically identifies the cause of the inoperability and the display device that displays the cause of the inoperability. Communicating with an inverter controller having a program memory for storing a program to be stored and a memory for storing the various operation commands based on the program of the program memory according to a cause investigation request command, retrieves the operation command, and operates it. It is determined whether or not it is the cause of failure, and the cause of operation that has been investigated is displayed on the display. An inverter device having a cause investigating circuit. 2. An inverter main circuit section for converting a DC voltage into a variable frequency and variable voltage AC, an inverter control apparatus for driving and controlling the inverter main circuit section, and an inverter command apparatus for giving various operation commands to the inverter control apparatus. The inverter command device has a display for displaying the cause of the inoperability, and the inverter control device has a memory for storing various operation commands of the inverter command device and a program for automatically determining the cause of the inoperability. Based on the program of the program memory in response to the cause investigation request command from the inverter command device, the memory for storing the various operation commands is read out and the operation command is retrieved to cause the inoperability. Whether or not there is a cause investigation circuit that sequentially judges whether or not the cause is impossible and displays it on the display. An inverter device having: