JP2007072552A - Control system, higher level equipment, lower level equipment, and method for transferring internal signal information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely acquire internal signal information by transmitting the information to the higher level equipment to record when an abnormality occurs to an electric motor or to acquire the internal signal information as much as needed without limit of information recording area within the electric motor. <P>SOLUTION: The electric motor 1 comprises an internal information recording means 13 and an internal information transferring means 14, and transfers the internal signal to the higher level equipment 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a control system composed of a higher-level device and a lower-level device connected to a network, and more particularly to an electric motor drive system used for driving industrial devices, robots, transfer devices, and the like.

Conventionally, when acquiring internal information of an apparatus for analysis or the like, a unit for acquiring information has been attached to the apparatus. For example, there is Patent Document 1 that deals with information such as an internal combustion engine of a vehicle and an air conditioner.
On the other hand, Patent Literature 2 is disclosed as a method for acquiring error log information of a client-server system.

  FIG. 6 is a block diagram showing a prior art according to Patent Document 1. In FIG. In FIG. 6, 63 is a control unit, 69 and 612 are CPUs, 64 is a monitoring unit, and 65 is a transmission line.

  With such a configuration, when acquiring the internal information of the CPU 69 of the control unit 63, the CPU 612 of the monitoring unit 64 is connected to the CPU 69 via the transmission line 65, and the internal information is constituted by the RAM inside the monitoring unit 64. When the abnormality is detected by the abnormality determination unit 627, writing to the history memory 623 is prohibited by the prohibition unit 628. In this way, internal information at the time of occurrence of abnormality is acquired.

  On the other hand, FIG. 7 and FIG. 8 are block diagrams showing the prior art according to Patent Document 2. In FIG. 7 and 8, 720 is a client, 721 is a peripheral device connected to the client, 722 is an external storage device for recording error log information, 823 is a sales office server having an external storage device 825, and 827 is an external storage device 829. An integrated server 82B is a maintenance terminal that refers to error log information.

With such a configuration, when the peripheral device 721 or the client 720 connected to the client 720 causes a hardware failure, it is recorded in the external storage device 722 as an error log. The sales office server 823 collects the error log of the client 720 and records it in the external storage device 825, and also records the error log in the external storage device 825 when the sales office server 823 generates a hardware failure. Similarly, the integrated server 827 collects the error log of the external storage device 825 of the sales office server 823 and records it in the external storage device 829. Similarly, the maintenance terminal 82B transfers the error log from the external storage device 829 of the integrated server 827, edits it so that it can be easily referred to, and outputs it to the output device 82D. In this way, error information of each client or server is collected and referenced.
Japanese Patent No. 2545134 (3rd page, Fig. 1) Japanese Patent Laid-Open No. 7-21059 (page 3, FIGS. 1 and 2)

  In the conventional monitoring unit in Patent Document 1, since the history memory is composed of RAM, if the power is cut off for some reason, the acquired information disappears, and detailed analysis using the acquired information cannot be performed later. was there. In addition, there is a problem that information shortage occurs due to history memory capacity limitation. Further, since information is acquired by connecting a monitoring unit at the time of vehicle maintenance and inspection, there is a problem that it is not possible to deal with abnormalities during actual operation. Furthermore, since only one target device is connected to one monitoring unit, if there are multiple target devices, a monitoring unit must be prepared for each, or information must be acquired by connecting one device at a time. I must. Therefore, when the recent miniaturization advances and the motor drive device incorporated in the device is targeted, the monitoring unit must be disassembled in order to connect the monitor unit and the motor drive device is not exposed in order to connect the monitor unit. Problem that cannot be connected.

  On the other hand, the error log recording in Patent Document 2 requires an external storage device, and in an electric motor drive device that requires a reduction in size and cost, an external storage device is connected only for error log recording. It is difficult to keep. In error log recording, error information is recorded, but internal information when an error occurs is not recorded, and it is very difficult to analyze the cause of the error.

The present invention has been made in view of such problems, and an internal signal in which a plurality of electric motor driving devices can transmit internal signal information to a host device and reliably acquire internal signal information sufficient for cause analysis of an abnormality. An object is to provide an information recording apparatus.

In order to solve the above problem, the present invention is configured as follows.
The invention according to claim 1 is a control system comprising a host device connected to a network and at least one subordinate device controlled according to a command given from the host device via the network. Internal signal recording means for recording and controlling internal signal information of the lower-level device, an information recording area in which the internal signal information is recorded by the internal signal recording means, an abnormality detection means for detecting an abnormality, and the abnormality detection means And an internal signal information transfer means for transmitting the internal signal information recorded by the internal signal recording means to the host device after detecting an abnormality.
According to a second aspect of the present invention, the upper device includes an information recording unit configured to record and control internal signal information transmitted from the plurality of lower devices for each of the plurality of lower devices, and the information recording unit And an information recording area in which internal signal information is recorded for each lower-level device.
The invention according to claim 3 is characterized in that the information recording area is non-volatile.
According to a fourth aspect of the present invention, there is provided an information recording device for recording information in a storage device, a host device connected to the information recording device via a network, and the host device connected to the host device via a network. In a control system comprising lower-order devices controlled in accordance with instructions from the device, the lower-order device has internal signal recording means for recording control of internal signal information of the lower-order equipment, and the internal signal information is received by the internal signal recording means. Information recording area to be recorded, abnormality detecting means for detecting abnormality, and internal signal information transferring means for transmitting the internal signal information recorded by the internal signal recording means to the host device after the abnormality detecting means detects the abnormality And the upper device adds information on the device to the internal signal information transmitted from the lower device and transmits the information to the information recording device. It is characterized in that it comprises a stage.
The invention according to claim 5 is characterized in that the information of the device is a node number of the lower device.
The invention described in claim 6 is characterized in that the information of the device is a node number of the lower device and address information of the upper device.
The invention according to claim 7 is characterized in that the internal signal information transfer means transmits the internal signal information, and the internal signal recording means records the internal signal information in the information recording area. is there.
The invention according to claim 8 is characterized in that the subordinate device is an electric motor drive device.
The invention according to claim 9 is a control system comprising an upper device connected to a network and at least one lower device controlled in accordance with a command given from the upper device via the network. The internal signal information of the lower device is recorded in an information recording area, the abnormality of the internal signal information is detected, the recorded internal signal information is transmitted to the upper device, and the upper device transmits the transmitted internal signal information. Processing is performed in a procedure of receiving signal information and recording the received internal signal information.
The invention according to claim 10 is an information recording device for recording information in a storage device, a host device connected to the information recording device via a network, and a host device connected to the host device via a network. In a control system comprising a lower-level device controlled in accordance with a command from the device, the lower-level device records internal signal information of the lower-level device, detects an abnormality in the internal signal information, and records the internal signal information To the host device, the host device receives the transmitted internal signal information, adds the device information to the received internal signal information, and adds the internal signal information to which the device information is added. Transmitting to the information recording device, the information recording device receiving the transmitted internal signal information, and recording the received internal signal information. It is an.
The invention according to claim 11 is a subordinate device controlled in accordance with a command given from a higher-level device via a network, wherein the lower-level device has an internal signal recording means for controlling recording of internal signal information of the lower-level device, and an abnormality. An abnormality detection means for detecting, and an internal signal information transfer means for transmitting the internal signal information recorded by the internal signal recording means to the host device after the abnormality detection means detects an abnormality. Is.
The invention described in claim 12 is characterized in that the subordinate device is an electric motor drive device.
According to a thirteenth aspect of the present invention, in the host device connected to the information recording apparatus via the network and controlling the lower device, the host device includes a device in the internal signal information of the lower device transmitted from the lower device. And an information recording means for transmitting the information to the information recording apparatus.
The invention described in claim 14 is characterized in that the lower-order device is an electric motor drive device.
The invention described in claim 15 is characterized in that the information on the device is a node number of the lower-level device.
The invention according to claim 16 is characterized in that the information of the device is a node number of the lower device and address information of the upper device.

According to the first, ninth, and eleventh aspects of the invention, the recorded internal signal information can be transmitted to the host device, and loss of the internal signal information due to power interruption or the like can be prevented. Furthermore, it is not necessary to connect a device for acquiring internal signal information.
According to the second aspect of the present invention, the upper device can record the internal signal information of a plurality of lower devices, and can acquire the internal signal information of the plurality of lower devices at a time.
According to the third aspect of the present invention, since the information recording area of the host device is nonvolatile, the internal signal information is not lost even if the power of the host device is shut off.
According to the invention described in claims 4, 5, 6, 10, 13, 15, and 16, an information recording device having a large capacity storage device is arranged above the host device, and the host device is connected to each lower device. Even if the upper device 2 does not have a nonvolatile information recording area or a sufficient information recording area cannot be secured in the upper device 2 to transmit the internal signal information, the loss of information is prevented, and the internal signal information is transmitted as much as necessary. Can be recorded.
Further, even when the host device does not have a nonvolatile information recording area, loss of internal signal information can be prevented.
Further, according to the invention described in claim 7, since the acquisition of the internal signal information and the transmission of the internal signal information are performed in parallel, the memory area in which the internal signal information for which transmission has been completed can be reused. Internal signal information can be recorded as much as possible.
Further, according to the eighth, twelfth, and fourteenth aspects, the internal signal information of the motor drive device can be transmitted to the host device, so that loss of the internal signal information due to power interruption or the like can be prevented. Furthermore, it is not necessary to connect a device for acquiring internal signal information.

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

  FIG. 1 is a diagram showing the configuration of the internal information recording apparatus of the present invention. In the figure, 4 is a network to which an electric motor drive device 1 (described later) and a host device 2 (described later) are connected. The type of the network 4 is not particularly limited, but generally, a field network to which equipment such as a controller and a sensor is connected is used.

  Reference numeral 1 denotes a lower-level device that is controlled in accordance with a command given from a higher-level device 2 (described later), and in the following embodiments, a motor driving device that drives the motor 3. Reference numeral 11 denotes a control unit that performs calculation based on a command received via the communication unit 15 and drives the motor 3. Reference numeral 12 denotes an abnormality detection means for monitoring each part in the electric motor drive device 1 and generating an abnormal signal when an abnormality occurs. Reference numeral 13 denotes internal signal recording means for recording the internal signal information of the control unit 11 in the information recording area 16. The internal information recording means 13 always records internal signal information. Here, the internal signal of the internal signal recording means 13 is acquired from the control unit 11, but the present invention is not particularly limited to this. Other signals, for example, signals of an I / O unit (not shown) are acquired and recorded. You may do it. Reference numeral 14 denotes internal signal information transfer means for transmitting the internal signal information recorded in the information recording area 16 to the host device 2 via the communication means 15. Reference numeral 15 denotes a communication means for exchanging various information via the network 4. Reference numeral 16 denotes an information recording area for internal signal information, to which a part of a memory used by a central processing unit (CPU) (not shown) of the motor drive device 1 is allocated. The information recording area 16 may have any structure, but a ring structure in which the area head and end are connected is preferable. The information recording area 16 does not have to be a part of the memory used by the CPU, and may be any as long as it exists in an area accessible by the CPU.

  Reference numeral 2 denotes a host device that gives a command issued by the command unit 21 to the motor drive device 1 connected via the network 4. The upper device 2 is generally a controller. Reference numeral 22 denotes communication means for the host device 2 to exchange various types of information via the network 4. Reference numeral 23 denotes information recording means for receiving the internal signal information transmitted from the internal signal information transfer means 14 of the electric motor drive device 1 via the communication means 15 and the network 4 via the communication means 22 and recording it in the information recording area 24. . The information recording area 24 is an area for recording and storing internal signal information secured in the nonvolatile storage area of the upper device 2. In general, the host device 2 has more storage resources than recording resources that can be used by the motor drive device 1, and can record and store internal signal information from the plurality of motor drive devices 1.

The difference between the present invention and Patent Document 1 is that the motor drive device 1 that is the object of information acquisition includes the internal signal information transfer means 14 and the host device 2 includes information recording means. Further, the difference from Patent Document 2 is that the external storage device is removed from the electric motor drive device 1 and the internal signal recording means 13 is provided.

  The operation of the internal signal information recording apparatus having the above configuration will be described with reference to FIGS. The internal information recording unit 13 always obtains (a) the instructed internal signal information at a preinstructed cycle and records (b) it in the information recording area 16 (FIG. 2A). Here, it is acquired from the control unit 11.

  Next, when the abnormality detection unit 12 detects any abnormality in the motor drive device 1 or the motor 3, the abnormality detection unit 12 generates an abnormality detection signal, and an abnormality is detected in the internal signal recording unit 13, the control unit 11, or other parts not shown. Is notified (c) (FIG. 2B).

  Next, the internal signal recording means 13 that has received the abnormality detection signal stops the recording of the internal signal after a pre-instructed operation such as an immediate stop of the internal signal information or a stop after recording the internal signal information for a pre-instructed period. (D) (FIG. 2C). If the internal signal information recording means 13 marks the internal signal information acquired when the abnormality detection signal is received and marks the occurrence of abnormality in the information recording area 16, the internal signal information at the time of occurrence of the abnormality can be determined. Good.

  Next, the internal signal recording unit 13 that has stopped recording in the information recording area 16 instructs the internal signal information transfer unit 14 to perform information transfer so as not to lose the recorded internal signal information. (E) (FIG. 2D). At this time, the internal signal information transfer means 14 is notified of information necessary for information transfer such as information on the start and end points of the internal signal information in the information recording area 16. If information necessary for information transfer can be referred to from the internal signal information transfer means 14, no notification is required.

  Next, the internal signal information transfer means 14 reads the internal signal information from the information recording area 16 (f) and transmits (g) the information to the host device 2 via the network using the communication means 15 (FIG. 2E). At this time, an identifier indicating that the internal information signal is transmitted due to an abnormality is added to the internal signal information to be transmitted so that the higher-level device 2 can discriminate.

  Next, (h) the received internal signal information is received via the communication means 22 (i) The information recording means 23 of the higher-level device discriminates by the identifier that the internal signal information is transmitted due to an abnormality, Information that can be discriminated by the transmission source motor drive device such as the node number is extracted from the communication means 22, an area for the motor drive device is secured in the information recording area 24, and internal signal information is recorded and stored (j) (FIG. 2F).

  As described above, according to the present embodiment, the internal signal information is transmitted to the host device and recorded and saved, thereby preventing the loss of the internal signal information due to the power interruption. Further, since the transmission source motor drive device is determined and recorded, internal signal information can be recorded for each lower-level device.

  FIG. 3 is a diagram showing the operation of the internal information recording apparatus of the second embodiment. Here, since the configuration of the second embodiment is the same as that of FIG. 1 showing the configuration of the internal signal information recording apparatus according to the first embodiment, the description thereof is omitted.

The operation of the second embodiment will be described below with reference to FIG.
First, from the normal state (FIG. 3A), the abnormality detection means 12 detects an abnormality and issues an abnormality signal (FIG. 3B). Since this is the same as in the first embodiment, the description thereof is omitted.
Next, the internal signal recording means 13 that has received the abnormality detection signal instructs the internal signal information transfer means 14 to start information transfer (d) (FIG. 3C). At this time, the internal signal information transfer means 14 is notified of information necessary for information transfer such as information on the start point of the internal signal information in the information recording area 16. If information necessary for information transfer can be referred to from the internal signal information transfer means 14, no notification is required. Further, the internal signal recording unit 13 makes it possible to refer to the position where the information recording area 16 is currently written from the internal signal information transfer unit 14.

Next, the internal signal information transfer means 14 that has received the information transfer start instruction reads the internal signal information from the information recording area 16 (e), and transmits it to the host device 2 via the network 4 using the communication means 15 (f ) At the time of reading, the internal signal recording means 13 refers to the information on the position where the writing is currently performed, and the previous information is not read from this position. In addition, an identifier indicating that the internal information signal is transmitted due to an abnormality is added to the internal signal information to be transmitted so that the upper device 2 can discriminate.
In the meantime, the internal signal recording means 13 reads the internal signal information from the control unit 11 (a), continues writing to the information recording area 16 (b), and updates the position information (FIG. 3D).

  Next, the host device 2 receives and records the internal signal information (FIG. 3E), but the procedure is the same as that of the first embodiment, and the description is omitted.

  The stop condition of the internal signal recording means 13 and the internal signal information transfer means 14 after receiving the abnormality detection signal may be given in advance so as to stop after recording for a certain period, or may be stopped by an external signal. Anyway.

  As described above, according to the present embodiment, the area in which the internal signal information read and transmitted to the host device is recorded can be reused. Therefore, even if the capacity of the information recording area 16 is limited, a necessary amount of internal signal information can be acquired.

FIG. 4 is a diagram showing the configuration of the internal signal information recording apparatus according to the third embodiment. In the figure, reference numeral 25 denotes a second communication means provided in the host device 2 for exchanging information with an information recording device 5 (described later). If the second communication unit 25 is for the same type of network as the communication unit 22, the communication unit 22 may also serve as the second communication unit 25.
In FIG. 4, reference numeral 5 denotes an information recording apparatus provided with a large-capacity storage device 6. Information recording means 52 for receiving signal information and recording it in the mass storage device 6 is provided. The information recording device 5 may be configured using a normal computer or the like, not a dedicated device. Reference numeral 6 denotes a mass storage device such as a hard disk drive.

Next, the operation of the third embodiment will be described with reference to FIG. FIG. 5 is a diagram showing the operation of the internal information recording apparatus of the third embodiment.
First, an abnormality is detected from the normal state, and internal signal information is transmitted from the motor drive device 1 to the host device 2. Since the steps up to this point are the same as those in the first and second embodiments, the description thereof will be given. Omitted.

Next, the internal signal information from the motor drive device 1 is received via the communication means 22 (k) The information recording means 23 is information for identifying the motor drive device 1 that has transmitted information such as the node number from the communication means 22. Is acquired and added to the internal signal information. Further, after adding information for identifying the host device 2 itself, for example, the network address of the second communication means, etc., it is transmitted to the information recording device 5 via the second communication means 25 (m).
(N) The information recording means 52 that has received the internal signal information via the communication means 51 allocates an area in the mass storage device 6 using the identification information of the host device 2 and the motor drive device 1 added to the internal signal information. Secure and record (o) internal signal information.

  As described above, according to the present embodiment, the internal signal information of the motor drive device 1 is recorded in the mass storage device 6, so that the upper device 2 does not have a non-volatile information recording area or the upper device 2 Even when a sufficient information recording area cannot be ensured, loss of information can be prevented and internal signal information can be recorded as much as necessary.

  In the above two embodiments, the network may be a LAN, and the upper device and the lower device may be digital home appliances.

Since the internal signal information at the time of occurrence of an abnormality is immediately transmitted to the information recording apparatus, it can be applied to the use of real-time cause analysis by providing an analysis means on the information recording apparatus.

The figure which shows the structure of the internal signal information recording device by 1st Example of this invention. The figure which shows operation | movement of the internal signal information recording device of this invention. The figure which shows operation | movement of the internal information recording device of 2nd Example. The figure which shows the structure of the internal signal information recording device by 3rd Example of this invention. The figure which shows operation | movement of the internal information recording device of 3rd Example. Configuration diagram showing conventional technology Configuration diagram showing conventional technology Configuration diagram showing conventional technology

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor drive device 2 Host apparatus 3 Motor 4 Network 5 Information recording device 6 Mass storage device 7 Network 11 Control part 12 Abnormality detection means 13 Internal signal recording means 14 Internal signal information transfer means 15 Communication means 16 Information recording area 21 Command part 22 communication means 23 information recording means 24 information recording area 25 second communication means 51 communication means 52 information recording means

Claims (16)

In a control system comprising a host device connected to a network and at least one lower device controlled according to a command given from the host device via the network,
The lower device is an internal signal recording means for recording and controlling internal signal information of the lower device;
An information recording area in which the internal signal information is recorded by the internal signal recording means;
An anomaly detecting means for detecting an anomaly;
An internal signal information transfer means for transmitting internal signal information recorded by the internal signal recording means to the host device after the abnormality detection means detects an abnormality;
A control system characterized by comprising: The host device is
Information recording means for recording and controlling internal signal information transmitted from a plurality of the lower devices for each of the plurality of lower devices;
The control system according to claim 1, further comprising: an information recording area in which internal signal information is recorded for each of the plurality of lower devices by the information recording unit. The control system according to claim 1, wherein the information recording area is nonvolatile. An information recording device that records information in a storage device, a host device connected to the information recording device via a network, and a subordinate device connected to the host device via a network and controlled according to a command from the host device In a control system consisting of equipment,
The lower device is an internal signal recording means for recording and controlling internal signal information of the lower device;
An information recording area in which the internal signal information is recorded by the internal signal recording means;
An abnormality detection means for detecting an abnormality;
An internal signal information transfer means for transmitting internal signal information recorded by the internal signal recording means to the host device after the abnormality detection means detects an abnormality, and
The control system includes an information recording means for adding information of the device to the internal signal information transmitted from the lower device and transmitting the information to the information recording device. The control system according to claim 4, wherein the device information is a node number of the lower device. 5. The control system according to claim 4, wherein the device information is a node number of the lower device and address information of the higher device. The internal signal information transfer means transmits the internal signal information,
5. The control system according to claim 1, wherein the internal signal recording unit records the internal signal information in the information recording area. The subordinate device according to claim 1, wherein the subordinate device is an electric motor drive device. In a control system comprising a host device connected to a network and at least one lower device controlled according to a command given from the host device via the network,
The lower device records the internal signal information of the lower device in an information recording area,
Detecting an abnormality in the internal signal information;
Send the recorded internal signal information to the host device,
The internal signal information transfer method, wherein the host device performs processing in a procedure of receiving the transmitted internal signal information and recording the received internal signal information. An information recording device that records information in a storage device, a host device connected to the information recording device via a network, and a subordinate device connected to the host device via a network and controlled according to a command from the host device In a control system consisting of equipment,
The lower device records internal signal information of the lower device,
Detecting an abnormality in the internal signal information;
Send the recorded internal signal information to the host device,
The upper device receives the transmitted internal signal information,
Add device information to the received internal signal information,
Transmitting the internal signal information to which the information of the device is added to the information recording device;
The information recording device receives the transmitted internal signal information;
A method of transferring internal signal information, wherein the received internal signal information is processed by a procedure of recording. In the lower device controlled according to the command given from the upper device via the network,
The lower device is an internal signal recording means for recording and controlling internal signal information of the lower device;
An abnormality detection means for detecting an abnormality;
A low-order device comprising: internal signal information transfer means for transmitting internal signal information recorded by the internal signal recording means to the high-order device after the abnormality detection means detects an abnormality. The subordinate device according to claim 11, wherein the subordinate device is an electric motor drive device. In the host device that controls the lower device connected to the information recording device via the network,
The host device comprises information recording means for adding device information to the internal signal information of the lower device transmitted from the lower device and transmitting the information to the information recording device. 14. The upper device according to claim 13, wherein the lower device is an electric motor drive device. 14. The upper device according to claim 13, wherein the device information is a node number of the lower device. 14. The upper device according to claim 13, wherein the device information includes a node number of the lower device and address information of the upper device.

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