Monitoring system, monitoring method, and monitoring program

Abstract

This monitoring system monitors a device which has a drive unit controlled by a controller and to which power from a main power supply is supplied. The monitoring system comprises at least one processor. The at least one processor acquires, from a sensor that detects the current state of the device, detection data indicating the current state, monitors the amount of power supplied from the main power supply to the device, controls a preliminary power supply so as to supply power to the drive unit and / or the controller when the amount of power is less than or equal to a threshold value, and executes determination processing for determining whether or not there is an abnormality in each of the main power supply and the device, on the basis of a state history indicating a past history of the detection data and a control history indicating a past history of control of the preliminary power supply.

Description

Monitoring System, Monitoring Method, and Monitoring Program 【0001】 One aspect of the present disclosure relates to a monitoring system, a monitoring method, and a monitoring program. 【0002】 Patent Document 1 describes a power supply monitoring data processing device that monitors a power supply system including a switching unit that selectively outputs AC power supplied from a utility power supply or an internal combustion power generation device. This power supply monitoring data processing device acquires first data including at least one of the output voltage and output current of the switching unit, and second data including at least one of the output voltage and output current of the power supply system, and estimates the operating status of the internal combustion power generation device based on the first data and the second data. Patent Document 2 describes a multi-relay device that performs control for monitoring and protecting equipment. 【0003】 Patent No. 7108874 International Publication No. 2022 / 162813 【0004】 A method for accurately determining whether there is an abnormality in each of the main power supply and the equipment powered by the main power supply is desired. 【0005】 A monitoring system according to one aspect of the present disclosure is a device having a drive unit controlled by a controller, and monitors the device powered by a main power supply. The monitoring system includes at least one processor. The at least one processor acquires detection data indicating the current state from a sensor that detects the current state of the device, monitors the amount of power supplied from the main power supply to the device, and controls a backup power supply to supply power to at least one of the drive unit and the controller when the amount of power becomes less than or equal to a threshold value. Based on a state history indicating the past history of the detection data and a control history indicating the past history of the control of the backup power supply, a determination process is executed to determine whether there is an abnormality in each of the main power supply and the device. 【0006】A monitoring method relating to one aspect of this disclosure is performed by a monitoring system that monitors a device having a drive unit controlled by a controller, the device being powered by a main power supply. This monitoring method includes the steps of: acquiring detection data indicating the current state from a sensor that detects the current state of the device; monitoring the amount of power supplied to the device from the main power supply and controlling a backup power supply to supply power to at least one of the drive unit and the controller when the amount of power falls below a threshold; and performing a determination process to determine whether or not there is an abnormality in the main power supply and the device, respectively, based on a state history indicating the past history of detection data and a control history indicating the past history of backup power supply control. 【0007】 One aspect of this disclosure relates to a monitoring program for a device having a drive unit controlled by a controller, and causes a computer to function as a monitoring system for monitoring the device, which is powered by a main power supply. The monitoring program causes the computer to perform the following steps: acquire detection data indicating the current state from a sensor that detects the current state of the device; monitor the amount of power supplied to the device from the main power supply and control a backup power supply to supply power to at least one of the drive unit and the controller when the amount of power falls below a threshold; and perform a determination process to determine whether or not there is an abnormality in the main power supply and the device, respectively, based on a state history indicating the past history of detection data and a control history indicating the past history of backup power supply control. 【0008】 In this respect, by using both the state history, which shows the past history of detection data indicating the current state of the equipment, and the control history, which shows the past history of backup power supply control, it is possible to understand the relationship between the current state of the equipment and the backup power supply control (i.e., the decrease in the amount of power supplied to the equipment from the main power supply). Based on this relationship, a judgment process is performed, which allows for an accurate determination of whether or not there is an abnormality in the main power supply and the equipment. 【0009】 According to one aspect of this disclosure, it is possible to accurately determine whether or not there is a malfunction in the main power supply and in the equipment that receives power from the main power supply. 【0010】 This is a diagram showing an example of the functional configuration of a monitoring system. This is a flowchart showing an example of the operation of a monitoring system. 【0011】 The following describes various examples in this disclosure in detail with reference to the attached drawings. In the description of the drawings, identical or equivalent elements are denoted by the same reference numeral, and redundant descriptions are omitted. 【0012】 [System Overview] The monitoring system described herein is a computer system that performs monitoring of equipment. This monitoring system monitors the equipment and determines whether there is an abnormality in the main power supply that provides power to the equipment and in the equipment itself. An abnormality in the main power supply means that the main power supply has failed and cannot supply a predetermined amount of power to the equipment. An abnormality in the equipment means that the equipment has failed and cannot operate under predetermined operating conditions. 【0013】 As an example, the equipment under monitoring includes industrial equipment such as kneaders and agitators. A kneader is a device that simultaneously mixes, crushes, kneads, and pounds materials to create a uniformly mixed state. An agitator is a device that mechanically stirs two or more substances in a container using agitator blades to create a desired mixture of those substances. 【0014】 [System Configuration] Monitoring system 1 consists of one or more computers. When multiple computers are used, these computers are connected via a communication network such as the Internet or an intranet to logically construct a single monitoring system 1. 【0015】 The computer comprising the monitoring system 1 generally includes a processor, storage device (memory), and communication interface as hardware components. The processor is, for example, a CPU, and the storage device consists of flash memory, a hard disk, etc. Each function of the monitoring system 1 is realized by the processor executing a program stored in the storage device. 【0016】The monitoring program for enabling a computer to function as monitoring system 1 includes program code for implementing each functional module of monitoring system 1. This monitoring program may be provided on a tangible recording medium, such as a CD-ROM, DVD-ROM, or semiconductor memory, on a non-temporary basis. Alternatively, the monitoring program may be provided via a communication network as a data signal superimposed on a carrier wave. The provided monitoring program is recorded, for example, on a storage device. 【0017】 Figure 1 shows the functional configuration of a monitoring system 1 as an example. The equipment 2, which is the target of monitoring system 1, is supplied with power from the main power supply 3. The main power supply 3 is, for example, the commercial power supply used during the normal operation of equipment 2. If the main power supply 3 becomes unable to supply a predetermined amount of power to equipment 2 for any reason, the backup power supply 4 supplies power to equipment 2. In other words, the backup power supply 4 is a backup power supply. The backup power supply 4 is, for example, a UPS (Uninterruptible Power Supply). As an example, during the normal operation of equipment 2, the main power supply 3 also supplies power to the backup power supply 4. If the main power supply 3 becomes unable to supply power to equipment 2, the system is controlled to supply power to equipment 2 through the backup power supply 4. 【0018】 The device 2 comprises a drive unit 21 and a drive target 22. The drive unit 21 drives the drive target 22 according to the power supplied from the main power supply 3 or the backup power supply 4. If the device 2 is a kneader, the drive unit 21 is, for example, a motor, and the drive target 22 is, for example, a blade connected to the motor via a shaft. 【0019】 In one example, the monitoring system 1 connects to a backup power supply 4, a controller 5, a sensor 6, and a database 7 via a communication network. The communication network is typically constructed using the internet, an intranet, or a combination thereof. The communication network can be constructed using a wired network, a wireless network, or a combination thereof. 【0020】The controller 5 is a device that controls the operation of the drive unit 21 according to the power supplied from the main power supply 3 or the backup power supply 4. The controller 5 may also control the operation of the drive unit 21 based on the operating conditions of the equipment 2 input by the user. The controller 5 may also control the operation of the drive unit 21 based on signals output from the monitoring system 1. The controller 5 may output the current operating status of the equipment 2. For example, the controller 5 may output the amount of power supplied from the main power supply 3 to the equipment 2. The controller 5 may be incorporated into the monitoring system 1, incorporated into the equipment 2, or be a device independent of both the monitoring system 1 and the equipment 2. 【0021】 Sensor 6 detects the actual state of the device 2 and outputs detection data indicating that actual state. In other words, sensor 6 detects the state of the device 2 in operation in real time. Sensor 6 is attached to the device 2, for example, and detects a predetermined physical quantity in the device 2. For example, sensor 6 is a vibration sensor that detects vibrations in the device 2 and outputs vibration data such as displacement, velocity, and acceleration as detection data. Alternatively, sensor 6 is a rotation speed sensor that detects the rotation speed of the drive target 22 in the device 2. Alternatively, sensor 6 is a torque sensor that detects the torque of the drive target 22 in the device 2. Alternatively, sensor 6 is a voltmeter that measures the voltage in the device 2. 【0022】 Sensor 6 may be placed in the environment surrounding the device 2 and may detect a predetermined physical quantity in that environment. For example, sensor 6 may be a temperature sensor placed in the environment surrounding the device 2 and may output temperature data in that environment as detected data. The number of sensors 6 may be any number of one or more. Sensor 6 may be composed of a combination of the multiple types of sensors described above. 【0023】 The monitoring system 1 includes a processor 101 that functions as a backup power control unit 11, a status acquisition unit 12, an abnormality determination unit 13, and an output unit 14. 【0024】The auxiliary power control unit 11 is a functional block that controls the auxiliary power supply 4 to supply power to at least one of the drive unit 21 and the controller 5. The status acquisition unit 12 is a functional block that receives detection data output from the sensor 6. The abnormality determination unit 13 is a functional block that performs a determination process to determine whether or not there is an abnormality in the main power supply 3 and the device 2. The output unit 14 is a functional block that outputs the result of the determination process to the controller 5. The output unit 14 may also output the result of the determination process to a terminal used by the user. 【0025】 Database 7 is a storage device that stores a state history showing the past history of detected data and a control history showing the past history of the control of the backup power supply 4. The state history may be time-series data showing the changes in detected data over time. The control history may be data that associates the timing at which the backup power supply 4 was controlled by the backup power supply control unit 11 with a flag indicating that the backup power supply 4 was used. The control history may also include the period during which power was supplied from the backup power supply 4. 【0026】 [System Operation] The operation of monitoring system 1 will be described below, along with the monitoring method related to this disclosure. 【0027】 (Control of backup power supply) The backup power supply control unit 11 monitors the amount of power supplied from the main power supply 3 to the equipment 2, and controls the backup power supply 4 to supply power to at least one of the drive unit 21 and the controller 5 when the amount of power falls below a threshold. The threshold may be the minimum amount of power required to operate the equipment 2 according to the specifications of the equipment 2. For example, the controller 5 may output the amount of power supplied from the main power supply 3 to the equipment 2 to the backup power supply control unit 11, and the backup power supply control unit 11 may control the backup power supply 4 based on that amount of power. The backup power supply control unit 11 stores the timing of the control of the backup power supply 4 in the database 7. As a result, the control history is accumulated in the database 7. 【0028】When power is supplied from the backup power supply 4 only to the drive unit 21, the rated operation of the device 2 can be maintained. When power is supplied from the backup power supply 4 only to the controller 5, the operation of the drive unit 21 can be controlled by the controller 5, allowing the device 2 to operate appropriately even when a predetermined amount of power is not supplied to the drive unit 21. When power is supplied to both the drive unit 21 and the controller 5, the operation of the drive unit 21 can be controlled by the controller 5 as needed while maintaining the rated operation of the device 2. 【0029】 (Determination of abnormalities) The operation of the monitoring system 1 will be explained with reference to Figure 2. Figure 2 is a flowchart showing an example of the operation of the monitoring system 1 as processing flow S1. 【0030】 Processing flow S1 assumes that a state history showing the history of detected data is stored in database 7 before processing flow S1 is executed. If the backup power supply 4 is used before processing flow S1 is executed, processing flow S1 assumes that the control history of the backup power supply 4 is stored in database 7. 【0031】 In step S11, the state acquisition unit 12 acquires detection data from the sensor 6 that indicates the actual state of the device 2. The state acquisition unit 12 stores the acquired detection data in the database 7. As a result, control history is further accumulated in the database 7. 【0032】 In step S12, the abnormality determination unit 13 determines whether the detected data indicates an abnormal value. If the detected data indicates an abnormal value (YES in step S12), the processing flow S1 proceeds to step S13. From step S13 onward, the process determines whether there is an abnormality in each of the devices 2 and the main power supply 3. If the detected data does not indicate an abnormal value (NO in step S12), the processing flow S1 ends. 【0033】As an example, the abnormality determination unit 13 determines that the detected data indicates an abnormal value if the instantaneous value of the detected data deviates significantly from the normal value by a predetermined value. The instantaneous value is the instantaneous value of the detected data, and is measured at very short intervals, for example, less than one second. The normal value may be a value set by the user, or a value set based on the specifications of the device 2. The range from the normal value to a predetermined value corresponds to the acceptable range of the detected data. The abnormality determination unit 13 may also determine that the detected data indicates an abnormal value if the instantaneous value of the detected data deviates significantly from the normal value by a predetermined percentage. 【0034】 In step S13, the abnormality determination unit 13 refers to the database 7 to obtain the status history of the device 2 and the control history of the backup power supply 4. 【0035】 In step S14, the abnormality determination unit 13 determines whether or not the backup power supply 4 was used based on the control history of the backup power supply 4. If the backup power supply 4 was used (YES in step S14), the processing flow S1 proceeds to step S15. If the backup power supply 4 was not used (NO in step S14), the processing flow S1 proceeds to step S18. As an example, the abnormality determination unit 13 determines that the backup power supply 4 was used if a flag indicating that the backup power supply 4 was used is included in the control history. 【0036】 In step S15, the abnormality determination unit 13 determines, based on the state history of the device 2 and the control history of the backup power supply 4, whether the detected data shows an abnormal value before the backup power supply 4 is used. If the detected data shows an abnormal value before the backup power supply 4 is used (YES in step S15), the processing flow S1 proceeds to step S16. If the detected data does not show an abnormal value before the backup power supply 4 is used (NO in step S15), the processing flow S1 proceeds to step S17. 【0037】 For example, the abnormality determination unit 13 determines, based on the state history and control history, whether the detected data shows an abnormal value at a time prior to the timing when the backup power supply 4 was controlled. 【0038】In step S16, the abnormality detection unit 13 determines that there is an abnormality in the main power supply 3 and an abnormality in the device 2. The output unit 14 outputs the result of the abnormality detection unit 13's determination process to the controller 5. When step S16 is completed, the processing flow S1 proceeds to step S21. 【0039】 In step S17, the abnormality detection unit 13 determines that there is an abnormality in the main power supply 3, but there is no abnormality in the device 2. The output unit 14 outputs the result of the abnormality detection unit 13's determination process to the controller 5. When step S17 is completed, the processing flow S1 proceeds to step S21. 【0040】 Here, we will explain the reason for the results of the determination process in steps S16 and S17. In the process that proceeds to steps S16 and S17, it is determined in step S14 that the backup power supply 4 has been used. The operation of the drive unit 21 may change instantaneously at the timing when power supply from the backup power supply 4 begins. In this case, the detected data may fluctuate instantaneously at the timing when power supply from the backup power supply 4 begins, and the detected data may show an abnormal value. Using this point, if the detected data does not show an abnormal value before the backup power supply 4 is used, it can be determined that the abnormal value of the detected data detected in step S12 was caused by the use of the backup power supply 4. In other words, it can be determined that there is no abnormality in the device 2. On the other hand, if the detected data shows an abnormal value before the backup power supply 4 is used, it can be determined that the abnormal value of the detected data detected in step S12 was caused by an abnormality in the device 2, regardless of the control of the backup power supply 4. 【0041】 In step S18, the abnormality determination unit 13 determines, based on the state history, whether the detection data acquired over a predetermined period in the past shows abnormal values ​​continuously or intermittently. The predetermined period may be a period set by the user. If the detection data shows abnormal values ​​continuously or intermittently (YES in step S18), the processing flow S1 proceeds to step S19. If the detection data does not show abnormal values ​​continuously or intermittently (NO in step S18), the processing flow S1 proceeds to step S20. 【0042】As an example, when the detection data always shows abnormal values within a predetermined time width, the abnormality determination unit 13 determines that the detection data continuously shows abnormal values. When the detection data shows abnormal values a predetermined number of times or more, the abnormality determination unit 13 determines that the detection data intermittently shows abnormal values. 【0043】 In step S19, the abnormality determination unit 13 determines that there is no abnormality in the main power supply 3 and there is an abnormality in the device 2. That is, the abnormality determination unit 13 determines that the abnormal value of the detection data detected in step S12 is caused by the abnormality of the device 2. The output unit 14 outputs the result of the determination process of the abnormality determination unit 13 to the controller 5. When step S19 ends, the processing flow S1 proceeds to step S21. 【0044】 In step S20, the abnormality determination unit 13 determines that there is no abnormality in the main power supply 3 and there is no abnormality in the device 2. That is, the abnormality determination unit 13 determines that the abnormal value of the detection data detected in step S12 is not caused by the abnormality of the device 2. In other words, the abnormality determination unit 13 does not immediately determine that there is an abnormality in the device 2 when an abnormal value of the detection data is temporarily detected, but determines that there is an abnormality in the device 2 when an abnormal value of the detection data is detected at a certain frequency. The output unit 14 outputs the result of the determination process of the abnormality determination unit 13 to the controller 5. When step S20 ends, the processing flow S1 ends. 【0045】 In step S21, the controller 5 controls the drive unit 21 of the device 2 based on the result of the determination process. The controller 5 may change the operating conditions of the device 2, such as the rotation speed of the device 2 and the parameters related to the degenerate operation of the device 2, based on the result of the determination process, and control the drive unit 21 of the device 2 according to the changed operating conditions. 【0046】Degraded operation refers to operating device 2 in a state where the functions of device 2 are partially restricted. The parameter related to the degraded operation is the ratio of the actual output of device 2 to the rated output of device 2. For example, when device 2 is a kneader or a stirrer, the output is the rotational speed of the kneader or the stirrer. In this case, a parameter related to the degraded operation being 80% means that the rotational speed of the kneader or the stirrer after the degraded operation is 0.8 times the rotational speed at the rated value of the kneader or the stirrer. 【0047】 As an example, when the result of the determination process indicates that there is no abnormality in the main power supply 3 and there is an abnormality in device 2 (when process flow S1 proceeds to step S19 and step S21 in this order), the controller 5 causes the drive unit 21 of device 2 to perform a degraded operation. 【0048】 [Modification Example] The technology according to the present disclosure has been described in detail based on various examples above. However, the present disclosure is not limited to the above examples. Various modifications are possible for the technology according to the present disclosure without departing from the gist thereof. 【0049】 In the above example, in step S15, the abnormality determination unit 13 determines whether the detection data indicates an abnormal value before the backup power supply 4 is used. However, in step S15, the abnormality determination unit 13 may determine whether the detection data acquired during a predetermined period before the backup power supply 4 is used continuously or intermittently indicates an abnormal value. In this case, when the detection data continuously or intermittently indicates an abnormal value, process flow S1 proceeds to step S16, and when the detection data does not continuously or intermittently indicate an abnormal value, process flow S1 proceeds to step S17. 【0050】 The processing procedures of the method executed by at least one processor are not limited to the above examples. For example, some of the above-described steps may be omitted, or each step may be executed in a different order. Also, any two or more of the above-described steps may be combined, or a part of the steps may be modified or deleted. Alternatively, other steps may be executed in addition to the above-described steps. 【0051】In comparing the relative magnitudes of two numerical values ​​in this disclosure, either of the two criteria, "greater than or equal to" and "greater than," may be used, or either of the two criteria, "less than or equal to" and "less than," may be used. 【0052】 In this disclosure, the expression "at least one processor executes a first process, a second process, ... and the Lth process," or a corresponding expression, indicates a concept that includes cases where the entity executing the L processes from the first process to the Lth process, i.e., the processor, changes along the way. In other words, this expression indicates a concept that includes both cases where all L processes are executed by the same processor and cases where the processor changes at an arbitrary rate for the L processes. 【0053】 [Note] As can be seen from the various examples above, this disclosure includes the following aspects: 【0054】(Note 1) A monitoring system for a device having a drive unit controlled by a controller, which is powered by a main power supply, comprising at least one processor, wherein the at least one processor acquires detection data indicating the current state from a sensor that detects the current state of the device, monitors the amount of power supplied to the device from the main power supply, controls a backup power supply to supply the power to at least one of the drive unit and the controller when the amount of power falls below a threshold, and performs a determination process to determine whether there is an abnormality in the main power supply and the device, respectively, based on a state history indicating the past history of the detection data and a control history indicating the past history of the control of the backup power supply. (Note 2) The monitoring system according to Note 1, wherein the at least one processor determines, based on the control history, that the power was supplied from the backup power supply, and determines, based on the state history and the control history, that the detection data did not show an abnormal value before the timing when the power was supplied from the backup power supply, then determines that there is an abnormality in the main power supply and there is no abnormality in the device. (Note 3) The monitoring system according to Note 1 or 2, wherein at least one processor determines, based on the control history, that power is not being supplied from the backup power supply, and based on the state history, that the detection data acquired over a predetermined period in the past shows abnormal values ​​continuously or intermittently, and determines that there is no abnormality in the main power supply and there is an abnormality in the equipment. (Note 4) The monitoring system according to Note 2 or 3, wherein at least one processor executes the determination process when the acquired detection data indicating the current state shows an abnormal value. (Note 5) The monitoring system according to any one of Notes 1 to 4, further comprising the controller, wherein the controller controls the drive unit of the equipment based on the result of the determination process. (Note 6) The monitoring system according to Note 5, wherein the controller causes the drive unit of the equipment to operate in degraded mode when the result of the determination process indicates that there is no abnormality in the main power supply and there is an abnormality in the equipment.(Note 7) A monitoring method performed by a monitoring system that monitors a device having a drive unit controlled by a controller and powered by a main power supply, the monitoring method comprising: a step of acquiring detection data indicating the current state from a sensor that detects the current state of the device; a step of monitoring the amount of power supplied to the device from the main power supply and controlling a backup power supply to supply the power to at least one of the drive unit and the controller when the amount of power falls below a threshold; and a step of performing a determination process to determine whether or not there is an abnormality for the main power supply and the device, respectively, based on a state history indicating the past history of the detection data and a control history indicating the past history of the control of the backup power supply. (Note 8) A monitoring program that causes a computer to function as a monitoring system for a device having a drive unit controlled by a controller, the device being powered by a main power supply, the program comprising: a step of obtaining detection data indicating the current state from a sensor that detects the current state of the device; a step of monitoring the amount of power supplied to the device from the main power supply, and controlling a backup power supply to supply the power to at least one of the drive unit and the controller when the amount of power falls below a threshold; and a step of executing a determination process to determine whether or not there is an abnormality in the main power supply and the device, based on a state history indicating the past history of the detection data and a control history indicating the past history of the control of the backup power supply. 【0055】 According to appendices 1, 7, and 8, by using both the state history, which shows the past history of detection data indicating the current state of the equipment, and the control history, which shows the past history of backup power supply control, it is possible to understand the relationship between the current state of the equipment and the backup power supply control (i.e., the decrease in the amount of power supplied to the equipment from the main power supply). Based on this relationship, a determination process is performed, which allows for an accurate determination of whether or not there is an abnormality in the main power supply and the equipment. 【0056】According to Appendix 2, for example, even if the detection data indicating the current state of the equipment shows an abnormal value, if the detection data did not show an abnormal value before power was supplied from the backup power supply, it can be determined that the detected abnormal value was caused by the use of the backup power supply. This allows for an accurate determination that there is no abnormality in the equipment. 【0057】 According to Appendix 3, it is possible to determine if the detected data shows abnormal values ​​continuously or intermittently, regardless of the control of the backup power supply. This allows for accurate determination of whether there is a malfunction in the equipment. 【0058】 According to Appendix 4, if the detection data indicating the current state shows an abnormal value, it is not immediately determined that there is a malfunction in the equipment. Instead, a determination process based on the state history and control history is executed. This helps to prevent incorrect determinations that there is a malfunction in the equipment. 【0059】 According to Appendix 5, the drive unit of the equipment can be appropriately controlled according to the state of the main power supply and the equipment itself. 【0060】 According to Appendix 6, the decrease in the operating rate of the equipment can be suppressed. 【0061】 1... Monitoring system, 2... Equipment, 3... Main power supply, 4... Backup power supply, 5... Controller, 6... Sensor, 21... Drive unit, 101... Processor.

Claims

1. A monitoring system for a device having a drive unit controlled by a controller, which is powered by a main power supply, comprising at least one processor, wherein the at least one processor acquires detection data indicating the current state from a sensor that detects the current state of the device, monitors the amount of power supplied to the device from the main power supply, controls a backup power supply to supply power to at least one of the drive unit and the controller when the amount of power falls below a threshold, and performs a determination process to determine whether or not there is an abnormality in the main power supply and the device, based on a state history indicating the past history of the detection data and a control history indicating the past history of the control of the backup power supply.

2. The monitoring system according to claim 1, wherein at least one processor determines, based on the control history, that power was supplied from the backup power supply, and, based on the state history and the control history, determines that the detection data did not show an abnormal value before the timing when power was supplied from the backup power supply, then determines that there is an abnormality in the main power supply and there is no abnormality in the equipment.

3. The monitoring system according to claim 1, wherein at least one processor determines, based on the control history, that power is not being supplied from the backup power supply, and, based on the state history, determines that the detection data acquired over a predetermined period in the past shows abnormal values ​​continuously or intermittently, the main power supply is not abnormal and the equipment is abnormal.

4. The monitoring system according to claim 2 or 3, wherein at least one processor executes the determination process when the acquired detection data indicating the current state indicates an abnormal value.

5. The monitoring system according to any one of claims 1 to 3, further comprising the controller, wherein the controller controls the drive unit of the device based on the result of the determination process.

6. The monitoring system according to claim 5, wherein the controller causes the drive unit of the device to operate in a reduced mode when the result of the determination process indicates that there is no abnormality in the main power supply but there is an abnormality in the device.

7. A monitoring method performed by a monitoring system that monitors a device having a drive unit controlled by a controller and powered by a main power supply, the monitoring method comprising: acquiring detection data indicating the current state from a sensor that detects the current state of the device; monitoring the amount of power supplied to the device from the main power supply, and controlling a backup power supply to supply the power to at least one of the drive unit and the controller when the amount of power falls below a threshold; and performing a determination process to determine whether or not there is an abnormality for the main power supply and the device, respectively, based on a state history indicating the past history of the detection data and a control history indicating the past history of the control of the backup power supply.

8. A monitoring program that causes a computer to function as a monitoring system for a device having a drive unit controlled by a controller, the device being powered by a main power supply, the program comprising: a step of obtaining detection data indicating the current state from a sensor that detects the current state of the device; a step of monitoring the amount of power supplied to the device from the main power supply, and controlling a backup power supply to supply the power to at least one of the drive unit and the controller when the amount of power falls below a threshold; and a step of performing a determination process to determine whether or not there is an abnormality for the main power supply and the device, based on a state history indicating the past history of the detection data and a control history indicating the past history of the control of the backup power supply.

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