JP3852636B2 - Status data collection method and control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention monitors the state change part of the control target device, temporarily stores the ON time and the state change part when the state change part is turned from OFF to ON as ON data in the ON data storage area, The present invention relates to a data collection method and a control apparatus for moving and storing stored ON data from an ON data storage area to a state data storage area when the stored ON data is paired with an OFF time.
[0002]
[Prior art]
The control target device is controlled by the control device and periodically monitored. When the control target device changes from one state to another state, the control unit uses the changed state change portion and the time as one data. Are stored in the storage means in the order of state change. For example, it is assumed that the device to be controlled has a state change part A where the normal state (OFF) changes to an abnormal state (ON) and a state change part B where the power supply state changes ON and OFF. Explaining with reference to FIG. 3, first, when turning from OFF to ON at time T <b> 1, ON data including the abnormal state change portion A and the ON time T <b> 1 is stored in the storage means of the control device. Next, when the state change part B changes from OFF to ON at time T2, ON data including the state change part B and its ON time T2 is stored in the storage means, and when the state change part B changes from ON to OFF at time T3, the state change occurs. OFF data including the part B and the OFF time T3 was stored. Next, when the state change part A changes from ON to OFF at time T4, OFF data including the state change part A and the OFF time T4 is stored. Next, when the state change portion B is turned from OFF to ON at time T5, the ON data is stored. In this way, the state changing portion and the time are recorded as a set of data in the order of change of ON and OFF in the storage means (FIG. 5).
[0003]
[Problems to be solved by the invention]
In the prior art, since the state change data is stored in the order of the time when it changes from ON to OFF, the ON data and OFF data that make a pair are difficult to understand, and when analyzing data or displaying a time chart or the like There is a problem that it is not easy to analyze and display the state of the control target device because it has to search for ON / OFF data to be paired and rearrange them in the order of the ON time. In addition, in order to know the state change part that is ON at the present time, it is necessary to search for ON data. At this time, all the data in the storage means is read to determine whether it is ON data. In this case, it is necessary to check that there is no OFF data paired with the ON data in the storage means. In addition, since ON data and OFF data that are paired in the storage means are recorded separately, there is a problem that ON data and OFF data overlap, and the data size increases.
An object of the present application is to facilitate the analysis and display of the state of the control target device, thereby facilitating data collection of the state of the state change part, and to reduce the data size stored in the storage unit.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the control device that controls the control target device monitors the state change portion of the control target device, and stores the state change portion and the time of the state change in the storage means in the control device. In the collecting method, the ON data storage area of the storage means temporarily stores ON data consisting of the state change portion changed from OFF to ON and the ON time at that time, and the state data storage area of the storage means stores the ON data. When the state change part changes from ON to OFF, the ON data stored in the ON data storage area corresponding to the changed state change part is paired with the OFF time when the ON data changes from ON to OFF. (Claim 1). The status data is stored in the status data storage area in the order in which the ON data is generated.
[0005]
As a device suitable for carrying out the method, in a control device that controls a device to be controlled, monitors a state change portion of the device to be controlled, and stores the state change portion and the time of state change in a storage unit. , An ON data storage area for sequentially storing ON data consisting of the state change part changed from OFF to ON and the ON time at that time is provided in the storage means to determine whether the monitored state change part is ON or OFF. And determining means for determining whether ON data corresponding to the determined state change part is stored in the ON data storage area, and the ON data corresponding to the state change part being OFF by the determination means. Is stored in the ON data storage area, the O data stored in the ON data storage area corresponding to the OFF state change portion is stored. State data creating means for adding state OFF time changed from ON to OFF to state data, and erasing means for erasing the ON data of the state data from the ON data storage area are provided, and this state data is stored in the state data When storing in the area, the ON time of the status data is compared with the ON time of other status data in the status data storage area, and rearrangement storage means is provided for rearranging in the order in which the ON data is generated. A display device capable of displaying ON data and status data in the status data storage area is provided.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiment of the present application will be described with reference to FIGS. Here, a machine tool line M such as a transfer machine is targeted as a control target device. The control device is a sequence controller 1 generally used to control such a machine tool line M. The sequence controller 1 includes a central processing unit (CPU) 2, a storage unit 3, a clock unit 4, and an I / O interface 5 for exchanging signals with external devices. In addition to the operation control program for the machine tool line M processed by the CPU 2, the storage means 3 is switched from OFF to ON in the program storage area 6 and the machine tool line M in which a monitor storage program for state change described later is stored. ON data storage area 7 for temporarily storing ON data consisting of the state change part and the ON time at that time. When a certain state change part changes from ON to OFF, it corresponds to this OFF state change part. A state data storage area 8 for storing state data in which the OFF time at that time is added to the ON data stored in the ON data storage area 7 to be stored in the order of generation of the ON data. Further, a computer 9 is connected to the sequence controller 1 via an I / O interface 5, and this computer 9 can display ON data and status data transferred from the storage means 3 as a time chart or the like. A display means 10 and an input means 11 for giving a data transfer command or the like to the sequence controller 1 are provided. ON and OFF means that, for example, the sequence controller 1 periodically monitors the machine tool line M, and this abnormal state is detected when the normal state changes and becomes abnormal at a certain state change part. Is on while the normal state is detected is off. The display means 10 and the input means 11 may be directly provided in the sequence controller 1.
[0007]
FIG. 2 shows a monitor storage program of the sequence controller 1. Step S1 is a data collection means for acquiring data by monitoring the state of each state change portion of the machine tool line M at a constant period. Steps S2, S3 and S5 constitute judgment means. In step S2, it is determined whether the data of the state change part collected in step S1 is OFF or ON. If this collected state is ON, it is determined in step S3 whether ON data corresponding to this ON state is stored in the ON data storage area 7, and if ON data is stored, step S1. If the ON data is not stored, the ON data is stored in the ON data storage area 7 in step S4. If the collection state is OFF, it is determined in step S5 whether ON data corresponding to the OFF collection state is stored in the ON data storage area 7. Step S6 is a state data creating means for adding ON time to the ON data when the ON data corresponding to the OFF collection state is stored in Step S5, and making it the state data. Step S7 is the state data. Is an erasing means for erasing the ON data fetched in the ON data storage area 7, and step S8 is the ON time of the status data created in step S6 and other statuses already stored in the status data storage area 8 It is a rearrangement storage means for comparing each data ON time and storing the status data in the order of the ON time.
[0008]
First, it is assumed that each state change portion to be monitored is in an OFF state. As shown in FIG. 3, it is assumed that an abnormality has occurred in the state change portion A at time T1 and has been turned from OFF to ON. In step S1, the sequence controller 1 monitors the state change part of the machine tool line M and collects the state. Since the normal state is turned off from the normal state OFF at time T1, it is determined in step S2 that the collected state change portion A is on. Next, in step S3, it is determined whether or not the ON data determined in step S2 is stored in the ON data storage area 7, and since this ON data is not stored in the ON data storage area 7 now, in step S4 The ON data is stored in the ON data storage area 7 ((1) in FIG. 4), and the process returns to step S1.
[0009]
At time T2, for example, if the state change part B representing the power state changes from OFF to ON, the state collected in step S1 is determined to be ON in step S2, and the ON data storage area is shown in FIG. In step S3, it is determined that no corresponding ON data is stored in step S3. In step S4, the ON data of the state change portion B is stored in the ON data storage area 7, and the process returns to step S1.
[0010]
Next, when the state of the state change portion B changes from ON to OFF at time T3, the state collected in step S1 is determined to be OFF in step S2, and step S5 is executed. As a result, when the state is OFF, the OFF data is not stored in the ON data storage area 7. In step S5, it is determined whether or not ON data corresponding to this OFF is stored in the ON data storage area 7. If there is no ON data, the process returns to step S1 again. As shown in FIG. 4 (2), since the ON data corresponding to the OFF data stored at time T2 is stored in the ON data storage area 7, in step S6, the ON data corresponding to this OFF is set to the OFF time. T3 is added to form status data. In step S7, the ON data incorporated in the status data is erased from the ON data storage area 7. As a result, the ON data and the OFF data are not stored separately in the storage means 3 as in the prior art, so that the recording size is reduced without storing duplicate items between the ON data and the OFF data. Next, in step S8, the ON time of the newly generated state data is compared with the ON times of other state data already stored in the state data storage area 8, and the ON time as shown in FIG. The data is rearranged in the order of data generation and stored, and the process returns to step S1.
[0011]
Next, when the state change part A changes from ON to OFF at time T4, steps S1, S2, S5, S6 and S7 are executed, and the ON times are compared in step S8. At this time, since the ON time T1 of the state change portion A is a time before the ON time T2 of the state change portion B, the state data of the state change portion A is more than the state data of the state change portion B as shown in FIG. Previously stored, the process returns to step S1 again, and thereafter step S1 and subsequent steps are repeated in the same manner. Note that the machine tool line M is periodically monitored by the sequence controller 1, and during the ON state such as the times T1 to T4 of the state change portion A and the times T2 to T3 of the state change portion B, step S1 is performed. , S2 and S3 are repeated, and steps S1, S2 and S5 are repeated while the state change portion A is OFF before time T1 and during the time T3 to T5 of the state change portion B. Needless to say. When the input means 11 of the computer 9 is operated to request ON data or status data from the sequence controller 1, the ON data and status data are transferred by an appropriate transfer method. As for the transferred ON and status data, only the ON data that is currently ON is recorded in the ON data storage area 7 in the order of the ON time, and the status data storage area 8 is a pair of ON and OFF. Since only the data is recorded along the time sequence of the ON time, if you want to display only what is currently ON on the display means 10, check all the ON and OFF data stored as before. There is no need to search for ON data, it is only necessary to display the data in the ON data storage area, and the ON / OFF time is also effective when the status data is displayed as a time chart as shown in FIG. Are included as a set, the time interval can be easily converted into a screen display scale, and display is easy.
[0012]
【The invention's effect】
As described above, according to the present invention, only ON data that is ON is temporarily stored in the ON data storage area, and when this ON data is turned OFF, it is stored from the ON data storage area to be paired with the OFF time. Since the data is moved and stored in the area, there is no overlap between the data, the data storage size can be reduced, and a large amount of data can be stored in the storage means. Further, since the status data is stored in the order of the generation time of the ON data, the display on the display means is easy. In addition, since only ON data that is currently ON is stored in the ON data storage area and only state data is stored in the state data storage area, necessary data is stored from all stored data as in the prior art. Since it is not necessary to search and search, it is efficient and analysis and display become easy.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an overall configuration of an apparatus of the present application.
FIG. 2 is a flowchart showing a monitor storage program.
FIG. 3 is a time chart of a state change portion monitored in the machine tool system.
FIG. 4 is an explanatory diagram showing a procedure for storing ON data and status data in a storage means;
FIG. 5 is an explanatory diagram showing conventional data storage;
[Explanation of symbols]
1 Sequence controller (control device)
3 Storage means 7 ON data storage area 8 Status data storage area M Control target equipment (machine tool line)

Claims (3)

In a data collection method for monitoring a state change portion of a control target device by a control device that controls the control target device, and storing the state change portion and the time of state change in a storage means in the control device, the storage means is turned on. In the data storage area, the ON data consisting of the state change part changed from OFF to ON and the ON time at that time is temporarily temporarily stored, and the state change part is switched from ON to OFF in the state data storage area of the storage means. The ON data stored in the ON data storage area corresponding to the changed state change part is moved and stored so as to be paired with the OFF time when changed from ON to OFF. To collect state data. 2. The state data collection method according to claim 1, wherein the state data is stored in the state data storage area in the order in which the ON data is generated. In the control device that controls the control target device, monitors the state change portion of the control target device, and stores the state change portion and the time of the state change in the storage unit, the state change portion changed from OFF to ON, An ON data storage area for temporarily storing ON data including the ON time at that time is provided in the storage means, and it is determined whether the monitored state change part is ON or OFF, and the determined state change part is associated. A determination means for determining whether or not the ON data is stored in the ON data storage area, and when the state change part is OFF by the determination means and corresponding ON data is stored in the ON data storage area The ON data stored in the ON data storage area corresponding to the OFF state change part has changed from ON to OFF. State data creating means for adding state to state data and erasing means for erasing the ON data of the state data from the ON data storage area. When this state data is stored in the state data storage area, Compared with the ON time of data and the ON time of other status data in the status data storage area, it is provided with rearrangement storage means for rearranging in the order in which the ON data is generated, and the ON data in the ON data storage area and the status of the status data storage area A control device comprising a display device capable of displaying data.

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