JP6888251B2 - Controls, drives, control methods, and control programs - Google Patents

Description

The present invention relates to a control device, a drive device, a control method, and a control program.

For example, the entire system such as an industrial device having an electric motor (also simply called a motor) or a production line including the motor is stopped regularly (for example, once a year) to the industrial device, particularly a motor. Maintenance and inspection of a power conversion device (also referred to as an inverter device or simply an inverter) that supplies drive power or a drive device of a motor including the inverter device (see, for example, Patent Document 1). However, relatively minor accidents such as the motor stopping may occur due to deterioration or failure of the device that was not found during regular maintenance and inspection. In addition, in the past, workers were isolated from the work area where industrial equipment was installed to ensure safety, but due to the background of high-mix low-volume production in recent years, workers often work in the work area. Therefore, there is a concern that the number of accidents involving workers will increase.
Patent Document 1 Japanese Unexamined Patent Publication No. 2014-174648

However, since it is difficult to detect deterioration or failure of the device that causes a relatively minor accident by regular maintenance and inspection, it is desirable to carry out maintenance and inspection at a high frequency. On the other hand, there is also a fact that the frequency of maintenance and inspection cannot be sufficiently increased because the industrial equipment or the entire system including the industrial equipment is stopped.

In the first aspect of the present invention, a timing determination unit that determines the diagnosis timing of the drive device according to the operating state of the drive device that drives the motor, and an instruction that instructs the drive device to diagnose the drive device at the diagnosis timing. A control device including a unit, a result acquisition unit that acquires a diagnosis result from a drive device, and a result output unit that outputs diagnostic information according to the diagnosis result is provided.

In the second aspect of the present invention, the drive device is connected to the control device of the first aspect, and at the diagnosis timing determined by the control device, a diagnostic instruction for instructing the diagnosis of the drive device is issued from the control device. A driving device including a receiving unit for receiving, a diagnostic unit for diagnosing the driving device in response to a diagnostic instruction, and a transmitting unit for transmitting the diagnosis result by the diagnostic unit to the control device is provided.

In the third aspect of the present invention, there are a step of determining the diagnosis timing of the drive device according to the operating state of the drive device for driving the motor, and a step of instructing the drive device to diagnose the drive device at the diagnosis timing. A control method including a step of acquiring a diagnostic result from a drive device and a step of outputting diagnostic information according to the diagnostic result is provided.

In the fourth aspect of the present invention, the computer is instructed to determine the diagnosis timing of the drive device according to the operating state of the drive device that drives the motor, and to instruct the drive device to diagnose the drive device at the diagnosis timing. A control program for executing a procedure, a procedure for acquiring a diagnosis result from a driving device, and a procedure for outputting diagnosis information according to the diagnosis result is provided.

The above outline of the invention does not list all the features of the present invention. A subcombination of these feature groups can also be an invention.

The configuration of the maintenance and inspection system according to this embodiment is shown. The diagnostic processing flow by the control device is shown. An example of a method for determining the diagnosis timing is shown. Another example of how to determine the diagnostic timing is shown. The diagnostic processing flow by the drive device is shown. The confirmation of the result of the diagnostic processing of the drive controller is shown. An example of the hardware configuration of the computer according to this embodiment is shown.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the inventions that fall within the scope of the claims. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention.

FIG. 1 shows the configuration of the maintenance / inspection system 100 according to the present embodiment. The purpose of the maintenance / inspection system 100 is to construct a system for maintaining / inspecting industrial equipment using a network, and to carry out maintenance / inspection at a high frequency while the industrial equipment is stopped to prevent accidents. Here, it is assumed that the industrial device includes, for example, a motor drive device including a motor and an inverter that supplies drive power to the motor. The maintenance / inspection system 100 includes a control device 10 and a drive device 20 for driving the motor 30.

The control device 10 and the drive device 20 are connected to each other so as to be able to communicate with each other via a network 40 such as Ethernet (registered trademark). Further, the control device 10 is not limited to one drive device 20, and a plurality of drive devices 20 may be connected to the network 40.

The control device 10 is connected to one or a plurality of drive devices 20 for driving the motor 30, and controls and maintains the operation of the motor 30 (simply also referred to as a normal operation) in the normal operation of each industrial device. In the present embodiment, as an example, maintenance and inspection of one drive device 20 will be considered. The control device 10 expresses its function by causing an information processing device including a computer, a microcontroller, and the like to execute a control program, and exhibits a communication unit 11, a schedule management unit 12, a result acquisition unit 13, a result output unit 14, and a result output unit 14. The access diagnosis processing unit 15 is provided.

The communication unit 11 is connected to the network 40 and communicates with the drive device 20 via the network 40. For example, the communication unit 11 receives the operation status from each drive device 20, transmits them to the schedule management unit 12, and transmits the diagnostic instruction generated by the schedule management unit 12 to the target drive device 20.

The schedule management unit 12 is a unit that generates a diagnostic instruction for the drive device 20, and includes a timing determination unit 12a and an instruction unit 12b.

The timing determination unit 12a determines the diagnosis timing of the drive device 20. The timing determination unit 12a receives the operation status from the plurality of drive devices 20 via the communication unit 11, and has each operation schedule of the plurality of drive devices 20 (or from the plurality of drive devices 20 together with the operation status). The drive device 20 for performing maintenance and inspection and its diagnosis timing are determined according to the operation status and / or the operation schedule. The method for determining the diagnosis timing will be described later. The determined maintenance / inspection target and diagnosis timing are transmitted to the indicator 12b.

The instruction unit 12b instructs the drive device 20 to make a diagnosis. The instruction unit 12b generates a diagnosis instruction at the diagnosis timing determined by the timing determination unit 12a, and transmits this to the drive device 20 subject to maintenance and inspection determined by the timing determination unit 12a via the communication unit 11. .. Here, the diagnosis of the drive device 20 includes command execution diagnosis of the drive controller 23 included in the drive device 20, characteristic diagnosis of the switching element included in the inverter 24 included in the drive device 20, and access diagnosis of the storage device 25 included in the drive device 20. , Data verification in the storage device 25 included in the drive device 20, drive diagnosis of the motor 30, and input / output diagnosis of the I / O interface (not shown) included in the drive device 20.

During the diagnosis of the drive device 20, an instruction to drive the motor 30 may be received by normal operation. In such a case, the instruction unit 12b generates an instruction to interrupt the diagnosis of the drive device 20 in response to receiving the drive instruction of the motor 30, and transmits this to the target drive device 20. When the diagnosis of the drive device 20 is interrupted, the instruction unit 12b generates an instruction to restart the interrupted diagnosis at the subsequent diagnosis timing, and transmits this to the target drive device 20. Thereby, the drive device 20 can be diagnosed by giving priority to the normal operation.

The instruction unit 12b stores the drive range information for defining the rotation range in which the motor 30 may be driven in the drive diagnosis of the motor 30. In the drive diagnosis of the motor 30, the instruction unit 12b generates an instruction to drive the motor 30 within the range of the drive range information by the drive device 20, and transmits this to the target drive device 20.

The result acquisition unit 13 acquires the diagnosis result and / or the measured value from the drive device 20 via the communication unit 11 and transmits the diagnosis result and / or the measured value to the result output unit 14.

The result output unit 14 is a unit that outputs diagnostic information according to the diagnostic result and / or the measured value, and includes a history storage unit 14a, a comparison unit 14b, and a determination unit 14c.

The history storage unit 14a stores the history data of the diagnosis result and / or the measured value acquired in the past by the result acquisition unit 13. The drive device 20 may perform a diagnosis when it is initialized. In such a case, the history storage unit 14a receives the result of the diagnosis executed by the drive device 20 in response to the initialization. , May be added to historical data.

The comparison unit 14b transfers the diagnosis result and / or the measured value newly acquired by the result acquisition unit 13 with the history data (that is, the diagnosis result and / or the measured value acquired in the past) recorded in the history storage unit 14a. Compare.

The determination unit 14c determines at least one of the failure status and the deterioration status of the drive device 20 based on the comparison result by the comparison unit.

The result output unit 14 outputs diagnostic information according to the comparison result by the comparison unit 14b.

When the instruction unit 12b instructs the access diagnosis of the storage device 25 included in the drive device 20, the access diagnosis processing unit 15 temporarily transfers the data in the storage device 25 to the storage device (not shown) of the access diagnosis processing unit 15. It is evacuated and returned to the storage device 25 after the access diagnosis.

The drive device 20 converts, for example, a constant voltage supplied from a constant voltage source into an AC voltage (for example, a three-phase AC voltage) and converts the motor 30 (for example, the U-phase, V-phase, and W-phase of a three-phase motor, respectively). It is a power conversion device that drives the motor 30 by supplying the motor 30 to the motor 30. The drive device 20 expresses its function by causing an information processing device including a computer, a microcontroller, and the like to execute a drive program, and displays a communication unit 21, a diagnostic unit 22, a drive controller 23, an inverter 24, and a storage device 25. Be prepared.

The communication unit 21 is connected to the network 40 and communicates with the control device 10 via the network 40. The communication unit 21 receives, for example, a diagnostic instruction from the control device 10, and outputs a diagnostic instruction to the diagnostic unit 22 and an operation instruction to the drive controller 23 accordingly.

The diagnosis unit 22 is a unit that receives a diagnosis command and executes a diagnosis instructed by the schedule management unit 12 (included in the instruction unit 12b) of the control device 10, and is a receiving unit 22a, a diagnosis unit 22b, and a transmitting unit 22c. including.

The receiving unit 22a receives a diagnostic instruction instructing the diagnosis of the driving device 20 from the control device 10 at the diagnostic timing determined by the schedule management unit 12 (included in the timing determining unit 12a) of the control device 10.

The diagnosis unit 22b performs a diagnosis of the drive device 20, particularly a self-diagnosis of the diagnosis unit and a diagnosis of the drive controller in response to the reception unit 22a receiving the diagnosis instruction. The diagnosis result is transmitted to the transmission unit 22c.

The transmission unit 22c transmits the diagnosis result by the diagnosis unit 22b to the control device 10 via the communication unit 21.

The drive controller 23 is a unit that drives and controls the motor 30 by receiving an operation instruction and transmitting a control signal to the inverter 24. Further, the drive controller 23 receives various measured values from the inverter 24 and transmits the measured values to the control device 10 via the communication unit 21.

The inverter 24 is a converter that receives a control signal from the drive controller 23, converts the constant voltage supplied from the constant voltage source into an AC voltage, and supplies the constant voltage to the motor 30 as a drive voltage. The inverter 24 has three legs connected to the U-phase, the V-phase, and the W-phase of the motor 30 (for example, a three-phase motor). Each leg has two switching elements that are connected between the positive and negative electrodes of a constant voltage source and are connected in series with a point connecting to each layer of the motor 30 interposed therebetween. Here, of the two switching elements, the portion including the element connected to the positive electrode side and the negative electrode side of the constant voltage source is referred to as an upper arm and a lower arm.

The storage device 25 is a device that stores parameters and the like required for controlling the inverter 24 by the drive controller 23 to drive the motor 30, and may be, for example, a non-volatile memory such as EEPROM.

FIG. 2 shows a diagnostic processing flow 200 by the control device 10.

In step 202, the schedule management unit 12 (timing determination unit 12a) of the control device 10 acquires the respective operation status (and operation schedule) from each drive device 20. The control device 10 periodically acquires the operating status of each drive device 20 by periodically executing the diagnostic processing flow 200 or periodically repeating step 202. The operating status includes, for example, during operation and during stop.

In step 204, the schedule management unit 12 (timing determination unit 12a) of the control device 10 confirms the operation schedule of each drive device 20. The operation schedule includes, for example, the operation schedule of each day in a period such as one week and one month, and the operation schedule of each day includes, for example, driving from 9:00 to 12:00 and from 13:00 to 17:00.

In step 206, the schedule management unit 12 (timing determination unit 12a) of the control device 10 determines the diagnosis timing of the drive device 20.

FIG. 3 shows an example of a method for determining the diagnosis timing. In step 202, the control device 10 periodically acquires the operating status of the drive device 20. Here, the current time is expressed _{as t 0.} The timing determination unit 12a, based on the operation history of the drive unit 20 until the current time t _0, to infer a free drive device 20 does not operate time. In the example of the figure, the timing determination unit 12a generates a historical movement pattern w1 based on the operation history, it is possible to estimate the free time Td operation pattern w2 and subsequent at the current time t ₀ from now. Therefore, the timing determination unit 12a determines the diagnosis timing at the timing during the free time Td.

FIG. 4 shows another example of a method of determining the diagnosis timing. Here, the control device 10 has an operation schedule of the drive device 20 (or has acquired the operation schedule of the drive device 20 in step 202). In the example in the figure, it can be seen from the operation schedule of the previous day that the operation was scheduled from 9:00 to 12:00 and from 13:00 to 17:00, and the stop was scheduled after 12:00 to 13:00 and 17:00. Therefore, the timing determination unit 12a estimates the timing at which the operation of the drive device 20 is not scheduled in the operation schedule of the day based on the past operation schedule, and determines the diagnosis timing within that timing. In the example in the figure, the diagnosis timing is determined between 12:00 and 13:00 and between 17:00 and 18:00, respectively. The diagnosis timing between 17:00 and 18:00 can be a preliminary timing when the diagnosis cannot be performed at the diagnosis timing between 12:00 and 13:00 for some reason.

In step 208, the schedule management unit 12 (instruction unit 12b) of the control device 10 instructs the drive device 20 to perform diagnosis and operation at the determined diagnosis timing. The diagnostic unit 22 of the drive device 20 receives the diagnosis instruction and performs the diagnosis of the drive device 20 instructed at the diagnosis timing. When the diagnostic unit 22 of the drive device 20 performs the instructed diagnosis, the diagnosis result is transmitted to the control device 10, and when the drive controller 23 performs the instructed operation, the measured value received from the inverter 24 is transmitted to the control device 10. The diagnostic processing flow of the drive device 20 will be described later.

In step 210, it is determined whether or not the result acquisition unit 13 of the control device 10 has received a new diagnosis result and / or a measured value from the drive device 20. Upon receiving the diagnosis result and / or the measured value from the drive device 20, the determination is affirmed and the process proceeds to step 212. If the diagnostic result and / or the measured value is not received from the drive device 20, the determination is denied and the process proceeds to step 218.

In step 212, the comparison unit 14b of the result output unit 14 reads out the history data (that is, the diagnosis result and / or the measured value acquired in the past) recorded in the history storage unit 14a.

In step 214, the comparison unit 14b of the result output unit 14 compares the diagnostic result and / or the measured value newly acquired in step 210 with the historical data read out in step 212. Following this, the determination unit 14c of the result output unit 14 determines the failure status and / or the deterioration status of the drive device 20 based on the comparison result by the comparison unit 14b. For example, the determination unit 14c estimates the period during which the drive device 20 can operate normally based on the comparison result. Thereby, based on the estimated normal operation period, for example, when the period is about to expire, it can be determined that the drive device 20 should be replaced with a new device.

In step 216, the determination unit 14c of the result output unit 14 outputs the determination result of the failure status and / or the deterioration status of the drive device 20 as diagnostic information. Here, the instruction unit 12b of the schedule management unit 12 stops driving the motor 30 in the normal operation when, for example, a failure and / or deterioration of the drive device 20 is determined based on the determination result of the determination unit 14c. It is possible to instruct the drive device 20.

In step 218, the elapsed time from the time when the diagnosis of the drive device 20 is instructed in step 208 is measured, and it is determined whether or not this exceeds a predetermined time. If the elapsed time exceeds a predetermined time, the determination is affirmed and the process proceeds to step 216 to diagnose that the drive device 20 is out of order, output the diagnosis information, and end the diagnosis processing flow 200. If the elapsed time does not exceed a predetermined time, the determination is denied and the process proceeds to step 220.

In step 220, the control device 10 communicates with the drive device 20 to determine whether or not the drive device 20 is in operation. When the drive device 20 is in operation, the determination is affirmed and the diagnostic processing flow 200 ends. If the drive device 20 is stopped, the determination is denied and the process returns to step 210. Steps 210, 218, and 220 are repeated until a predetermined time elapses, and by receiving the diagnosis result and / or the measured value from the drive device 20, the judgment of step 210 is affirmed and the process proceeds to step 212. When the predetermined time elapses, the determination in step 218 is affirmed and the process proceeds to step 216, or the drive device 20 starts the operation to end the diagnosis processing flow 200.

FIG. 5 shows a diagnostic processing flow 300 by the drive device 20.

In step 302, the receiving unit 22a of the diagnostic unit 22 receives the diagnostic instruction of the drive device 20 transmitted by the schedule management unit 12 (instruction unit 12b) of the control device 10 in step 208.

In step 304, the diagnostic unit 22 determines whether or not the drive device 20 is in operation. If the drive device 20 is stopped, the determination is affirmed and the process proceeds to step 306. If the drive device 20 is in operation, the determination is denied and the process proceeds to step 324.

In step 324, the diagnostic unit 22 notifies the control device 10 that the drive device 20 is in operation, and ends the diagnostic process flow 300.

In step 306, the receiving unit 22a of the diagnostic unit 22 outputs a diagnostic instruction, which is received by the diagnostic unit 22b.

In step 308, the diagnostic unit 22 performs a self-diagnosis. As self-diagnosis, the diagnostic unit 22 performs, for example, instruction execution diagnosis of the drive controller 23 included in the drive device 20, access diagnosis of the storage device 25, and data verification in the storage device 25.

In the instruction execution diagnosis of the drive controller 23, the diagnostic unit 22 diagnoses whether or not the instruction expressing the function of the drive controller 23 is correctly processed by the processor in the information processing device constituting the drive device 20. In addition to the instruction execution diagnosis, it may be further diagnosed whether or not the register can be rewritten.

In the access diagnosis of the storage device 25, the diagnostic unit 22 diagnoses the storage device 25 by, for example, the Abraham method. At the time of access diagnosis, the access diagnosis processing unit 15 of the control device 10 temporarily saves the data in the storage device 25, executes the diagnosis in the unused area, and saves the data in the area where the diagnosis is completed. Return. Thereby, the failure of the storage device 25 can be diagnosed without damaging the data.

In the data verification in the storage device 25, the diagnostic unit 22 verifies the contents of the data by, for example, a cyclic redundancy check (CRC). A data verification unit that executes data verification in the storage device 25 may be provided independently of the diagnostic unit 22.

In addition, the diagnostic unit 22 may diagnose an emergency stop button for emergency stopping the drive device 20 (drive controller 23) as an input / output diagnosis of the I / O interface (not shown) included in the drive device 20. .. The emergency stop button operates, for example, when a predetermined voltage (or a periodic pulse) is input and the voltage is cut off when the emergency stop button is pressed. Therefore, in the input / output diagnosis, the voltage output to the emergency stop button and the voltage input from the voltage are diagnosed.

In step 310, the diagnostic unit 22 diagnoses the drive controller 23. The diagnostic unit 22 performs, for example, characteristic diagnosis of the switching element included in the inverter 24 included in the drive device 20 and drive diagnosis of the motor 30 as diagnosis of the drive controller 23.

In the characteristic diagnosis of the switching element, the diagnostic unit 22b of the diagnostic unit 22 transmits an instruction to the drive controller 23 and applies a diagnostic signal to the gate of the switching element included in the inverter 24 to change the potential difference between both ends of the switching element. To detect. Here, the diagnostic signal has, for example, a predetermined pulse width, and the diagnostic unit 22b may detect the pulse width generated in the potential difference between both ends of the switching element with respect to the pulse width.

The characteristic diagnosis of the switching element is performed at different timings for each of the plurality of legs in the inverter 24, and for each of the switching element of the upper arm and the switching element of the lower arm of each leg. As a result, the drive voltage is not applied to each layer of the motor 30, and the diagnosis can be executed without driving the motor 30. However, when a plurality of switching elements are provided in parallel on each arm of each leg, the characteristic diagnosis may be executed for these plurality of switching elements at the same time. Alternatively, a plurality of leg switching elements may be diagnosed at the same time.

In the drive diagnosis of the motor 30, the diagnostic unit 22 diagnoses whether or not the motor 30 is driven. The diagnostic unit 22 controls the inverter 24 via the drive controller 23 to drive the motor 30 within the range of the drive range information stored by the schedule management unit 12 (instruction unit 12b) of the control device 10. Thereby, it can be confirmed whether the motor 30 is driven within that range.

FIG. 6 shows confirmation of the result of the diagnostic processing of the drive controller 23 by the diagnostic unit 22. When the diagnostic unit 22 instructs the drive controller 23 to perform diagnostic processing for any item in step 310, the diagnostic unit 22 holds the result value processed for the item, and the drive controller 23 performs diagnostic processing for the instructed item. It is executed and the processing result is transmitted to the diagnostic unit 22. The diagnostic unit 22 confirms the processing result by receiving the processing result and comparing it with the result value of the corresponding item.

In step 312, when the self-diagnosis of the diagnosis unit 22 and the diagnosis of the drive controller 23 are completed, the diagnosis unit 22 stores the results in the storage device 25.

In step 314, the drive controller 23 receives the operation instruction of the drive device 20 transmitted by the schedule management unit 12 (instruction unit 12b) of the control device 10 in step 208.

In step 316, the drive controller 23 outputs a control signal to the inverter 24. As a result, the inverter 24 operates the motor 30 and measures the response to the motor 30, for example, the current value of energizing each phase of the motor 30, the voltage value applied to each layer, the driving speed of the motor 30, and the like.

In step 318, the drive controller 23 receives the measured value from the inverter 24.

In step 320, the drive controller 23 stores the measured value received from the inverter 24 in the storage device 25.

In step 322, when the diagnosis process and the operation process are completed, the diagnosis unit 22 (transmission unit 22c) transmits the diagnosis result, and the drive controller 23 transmits the measured value to the control device 10, respectively. As a result, the diagnostic processing flow 300 is terminated.

FIG. 7 shows an example of the hardware configuration of the computer 1900 according to the present embodiment. The computer 1900 according to the present embodiment is connected to the host controller 2082 by the input / output controller 2084 and the CPU peripheral portion having the CPU 2000, the RAM 2020, the graphic controller 2075, and the display device 2080 which are interconnected by the host controller 2082. An input / output unit having a communication interface 2030, a hard disk drive 2040, and a CD-ROM drive 2060, and a legacy input / output unit having a ROM 2010, a flexible disk drive 2050, and an input / output chip 2070 connected to the input / output controller 2084. To be equipped.

The host controller 2082 connects the RAM 2020 to the CPU 2000 and the graphic controller 2075 that access the RAM 2020 at a high transfer rate. The CPU 2000 operates based on the programs stored in the ROM 2010 and the RAM 2020, and controls each part. The graphic controller 2075 acquires image data generated on a frame buffer provided in the RAM 2020 by the CPU 2000 or the like, and displays the image data on the display device 2080. Instead, the graphic controller 2075 may internally include a frame buffer for storing image data generated by the CPU 2000 or the like.

The input / output controller 2084 connects the host controller 2082 to a communication interface 2030, a hard disk drive 2040, and a CD-ROM drive 2060, which are relatively high-speed input / output devices. Communication interface 2030 communicates with other devices via a network. The hard disk drive 2040 stores programs and data used by the CPU 2000 in the computer 1900. The CD-ROM drive 2060 reads a program or data from the CD-ROM 2095 and provides it to the hard disk drive 2040 via the RAM 2020.

Further, the input / output controller 2084 is connected to the ROM 2010, the flexible disk drive 2050, and the relatively low-speed input / output device of the input / output chip 2070. The ROM 2010 stores a boot program executed by the computer 1900 at startup and / or a program depending on the hardware of the computer 1900. The flexible disk drive 2050 reads a program or data from the flexible disk 2090 and provides it to the hard disk drive 2040 via the RAM 2020. The input / output chip 2070 connects the flexible disk drive 2050 to the input / output controller 2084, and inputs / outputs various input / output devices via, for example, a parallel port, a serial port, a keyboard port, a mouse port, and the like. Connect to controller 2084.

The program provided to the hard disk drive 2040 via the RAM 2020 is stored in a recording medium such as a flexible disk 2090, a CD-ROM 2095, or an IC card and provided by the user. The program is read from the recording medium, installed on the hard disk drive 2040 in the computer 1900 via the RAM 2020, and executed in the CPU 2000.

The program installed in the computer 1900 and causing the computer 1900 to function as the control device 10 includes a communication module, a schedule management module, a result acquisition module, and a result output module. These programs or modules act on the CPU 2000 or the like to connect the computer 1900 to the communication unit 11, the schedule management unit 12 (timing determination unit 12a and instruction unit 12b), the result acquisition unit 13, and the result output unit 14 (history storage unit 14a). , The comparison unit 14b, and the determination unit 14c), respectively. A program installed in the computer 1900 and causing the computer 1900 to function as the drive device 20 includes a communication module, a diagnostic module, and a drive module. These programs or modules act on the CPU 2000 or the like to cause the computer 1900 to function as a communication unit 21, a diagnostic unit 22 (reception unit 22a, diagnostic unit 22b, and transmission unit 22c), and a drive controller 23, respectively.

The information processing described in these programs is read into the computer 1900, and the communication unit 11 and the schedule management unit 12 (timing determination), which are specific means in which the software and the various hardware resources described above cooperate with each other, are used. Unit 12a and instruction unit 12b), result acquisition unit 13, result output unit 14 (history storage unit 14a, comparison unit 14b, and determination unit 14c) or communication unit 21, diagnostic unit 22 (reception unit 22a, diagnostic unit 22b, and It functions as a transmitter 22c) and a drive controller 23. Then, by realizing the calculation or processing of information according to the purpose of use of the computer 1900 in the present embodiment by these specific means, a specific control device 10 or drive device 20 according to the purpose of use is constructed. ..

As an example, when communicating between the computer 1900 and an external device or the like, the CPU 2000 executes a communication program loaded on the RAM 2020, and based on the processing content described in the communication program, a communication interface. Instruct 2030 to perform communication processing. Under the control of the CPU 2000, the communication interface 2030 reads the transmission data stored in the transmission buffer area or the like provided on the storage device such as the RAM 2020, the hard disk drive 2040, the flexible disk 2090, or the CD-ROM 2095, and transfers the transmission data to the network. The received data transmitted or received from the network is written to the reception buffer area or the like provided on the storage device. As described above, the communication interface 2030 may transfer the transmitted / received data to / from the storage device by the DMA (direct memory access) method, and instead, the CPU 2000 may transfer the transfer source storage device or the communication interface 2030. The transmitted / received data may be transferred by reading the data from the data and writing the data to the communication interface 2030 or the storage device of the transfer destination.

Further, the CPU 2000 is all or necessary from files or databases stored in an external storage device such as a hard disk drive 2040, a CD-ROM drive 2060 (CD-ROM 2095), and a flexible disk drive 2050 (flexible disk 2090). Is read into the RAM 2020 by DMA transfer or the like, and various processes are performed on the data on the RAM 2020. Then, the CPU 2000 writes the processed data back to the external storage device by DMA transfer or the like. In such processing, the RAM 2020 can be regarded as temporarily holding the contents of the external storage device. Therefore, in the present embodiment, the RAM 2020 and the external storage device are collectively referred to as a memory, a storage unit, a storage device, or the like. Various information such as various programs, data, tables, and databases in the present embodiment are stored in such a storage device and are subject to information processing. The CPU 2000 can also hold a part of the RAM 2020 in the cache memory and read / write on the cache memory. Even in such a form, the cache memory plays a part of the function of the RAM 2020. Therefore, in the present embodiment, the cache memory is also included in the RAM 2020, the memory, and / or the storage device, unless otherwise indicated. To do.

In addition, the CPU 2000 includes various operations, information processing, condition determination, information retrieval / replacement, and the like specified in the instruction sequence of the program for the data read from the RAM 2020. Is performed, and the data is written back to the RAM 2020. For example, when the CPU 2000 determines a condition, whether or not the various variables shown in the present embodiment satisfy conditions such as large, small, greater than or equal to, less than, equal to, and the like as compared with other variables or constants. If the condition is satisfied (or if it is not satisfied), it branches to a different instruction sequence or calls a subroutine.

In addition, the CPU 2000 can search for information stored in a file in the storage device, a database, or the like. For example, when a plurality of entries in which the attribute value of the second attribute is associated with the attribute value of the first attribute are stored in the storage device, the CPU 2000 describes the plurality of entries stored in the storage device. By searching for an entry in which the attribute value of the first attribute matches the specified condition and reading the attribute value of the second attribute stored in that entry, it is associated with the first attribute that satisfies the predetermined condition. The attribute value of the second attribute obtained can be obtained.

In addition, the execution order of each process such as operation, procedure, step, and step in the device, system, program, and method shown in the claims, the specification, and the drawings is particularly "before" and ". It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Even if the scope of claims, the specification, and the operation flow in the drawings are explained using "first", "next", etc. for convenience, it means that it is essential to carry out in this order. It's not a thing.

The program or module shown above may be stored in an external recording medium. As the recording medium, in addition to the flexible disk 2090 and the CD-ROM 2095, an optical recording medium such as a DVD or a CD, a magneto-optical recording medium such as an MO, a tape medium, a semiconductor memory such as an IC card, or the like can be used. Further, a storage device such as a hard disk or RAM provided in a dedicated communication network or a server system connected to the Internet may be used as a recording medium, and a program may be provided to the computer 1900 via the network.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

The order of execution of operations, procedures, steps, steps, etc. in the devices, systems, programs, and methods shown in the claims, specification, and drawings is particularly "before" and "prior to". It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Even if the scope of claims, the specification, and the operation flow in the drawings are explained using "first", "next", etc. for convenience, it means that it is essential to carry out in this order. It's not a thing.

10 ... control device, 11 ... communication unit, 12 ... schedule management unit, 12a ... timing determination unit, 12b ... instruction unit, 13 ... result acquisition unit, 14 ... result output unit, 14a ... history storage unit, 14c ... judgment unit, 14b ... Comparison unit, 15 ... Access diagnosis processing unit, 20 ... Drive device, 21 ... Communication unit, 22 ... Diagnostic unit, 22a ... Receiver unit, 22b ... Diagnosis unit, 22c ... Transmission unit, 23 ... Drive controller, 24 ... Inverter , 25 ... Storage device, 30 ... Motor, 40 ... Network, 100 ... Maintenance and inspection system, 200 ... Diagnostic processing flow, 300 ... Diagnostic processing flow, 1900 ... Computer, 2000 ... CPU, 2010 ... ROM, 2020 ... RAM, 2030 ... Communication interface, 2040 ... hard disk drive, 2050 ... flexible disk drive, 2060 ... CD-ROM drive, 2070 ... input / output chip, 2075 ... graphic controller, 2080 ... display device, 2082 ... host controller, 2084 ... input / output controller , 2090 ... Flexible disk, 2095 ... CD-ROM.

Claims (19)

A timing determination unit that determines the diagnostic timing of the drive device according to the operating status of the drive device that drives the motor, and a timing determination unit.
At the diagnosis timing, an instruction unit that instructs the drive device to diagnose the drive device, and
A result acquisition unit that acquires a diagnosis result from the drive device,
A result output unit that outputs diagnostic information according to the diagnostic result,
With
The timing determination unit
Based on the operation history of the drive device, the free time during which the drive device does not operate is estimated.
A control device that determines the diagnosis timing at the timing during the free time. The timing determination unit
Acquire the operation schedule of the drive device and
The control device according to claim 1, wherein the diagnosis timing is determined at a timing when the operation of the drive device is not scheduled in the operation schedule. The control device according to claim 1 or 2, wherein the instruction unit interrupts the diagnosis of the drive device in response to receiving an instruction to drive the motor by a normal operation during the diagnosis of the drive device. The control device according to claim 3, wherein the indicator restarts the interrupted diagnosis at the subsequent diagnosis timing when the diagnosis of the drive device is interrupted. As instructions for diagnosing the drive device, the indicator unit diagnoses the instruction execution of the drive controller included in the drive device, diagnoses the characteristics of the switching element included in the inverter included in the drive device, and accesses the storage device included in the drive device. The control according to any one of claims 1 to 4, which instructs the drive device to execute at least one of the diagnosis, the drive diagnosis of the motor, and the input / output diagnosis of the I / O interface included in the drive device. apparatus. The control device according to claim 5, further comprising an access diagnosis processing unit that temporarily saves data in the storage device and returns the data in the storage device to the storage device after the access diagnosis. The indicator
The drive range information for defining the range in which the motor may be driven in the drive diagnosis of the motor is stored, and the drive range information is stored.
The control device according to claim 5 or 6, wherein in the drive diagnosis of the motor, the drive device is instructed to drive the motor within the range of the drive range information. The result output unit
A history storage unit that stores the history data of the diagnosis results acquired in the past,
A comparison unit that compares the newly acquired diagnosis result with the historical data,
Have,
The control device according to any one of claims 1 to 7, which outputs the diagnostic information according to the comparison result by the comparison unit. The control device according to claim 8, wherein the result output unit further includes a determination unit that determines at least one of a failure status and a deterioration status of the drive device based on the comparison result by the comparison unit. The control device according to claim 9, wherein the instruction unit instructs the drive device to stop driving the motor in a normal operation based on the determination result of the determination unit. The control device according to claim 9 or 10, wherein the determination unit estimates a period during which the drive device can normally operate based on the comparison result of the comparison unit. The history storage unit receives the result of the diagnostic process executed by the drive device in response to the initialization of the drive device, and adds the result of the diagnostic process to the history data according to any one of claims 8 to 11. Control device. The control device according to any one of claims 1 to 12, wherein the control device is connected to the plurality of the drive devices and controls the normal operation of each of the plurality of drive devices. A drive device connected to the control device according to any one of claims 1 to 13.
At the diagnosis timing determined by the control device, a receiving unit that receives a diagnostic instruction instructing the diagnosis of the drive device from the control device, and
A diagnostic unit that diagnoses the drive device in response to the diagnostic instructions, and
A transmission unit that transmits the diagnosis result by the diagnosis unit to the control device, and a transmission unit.
A drive device equipped with. In response to the diagnostic instruction, the diagnostic unit performs command execution diagnosis of the drive controller of the drive device, characteristic diagnosis of the switching element included in the inverter of the drive device, access diagnosis of the storage device of the drive device, and so on. The drive device according to claim 14, further performing at least one of the drive diagnosis of the motor and the input / output diagnosis of the I / O interface included in the drive device. The driving device according to claim 15, wherein the diagnostic unit applies a diagnostic signal to the gate of the switching element in the characteristic diagnosis of the switching element, and detects a change in the potential difference between both ends of the switching element. 16. The diagnostic unit applies the diagnostic signal having a predetermined pulse width to the gate of the switching element in the characteristic diagnosis of the switching element, and detects the width of the pulse generated in the potential difference between both ends of the switching element. The drive device described in. The stage where the control device determines the diagnostic timing of the drive device according to the operating status of the drive device that drives the motor, and
At the diagnosis timing, a step in which the control device instructs the drive device to diagnose the drive device, and
The stage where the control device acquires the diagnosis result from the drive device, and
The stage where the control device outputs diagnostic information according to the diagnostic result, and
With
The stage at which the control device determines the diagnosis timing is
A stage in which the control device estimates a free time during which the drive device does not operate based on the operation history of the drive device.
A control method including a step in which the control device determines the diagnosis timing at a timing during the free time. On the computer
A procedure for determining the diagnostic timing of the drive device according to the operating status of the drive device that drives the motor, and
At the diagnosis timing, a procedure for instructing the drive device to diagnose the drive device, and
The procedure for obtaining the diagnosis result from the drive device and
The procedure for outputting diagnostic information according to the diagnostic result and the procedure for outputting the diagnostic information are executed.
The procedure for determining the diagnosis timing is as follows.
A procedure for estimating the free time during which the drive device does not operate based on the operation history of the drive device, and a procedure for estimating the free time during which the drive device does not operate.
A control program including a procedure for determining the diagnosis timing to a timing during the free time.

Images