JPH1185264A - State data gathering method and control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easy to gather data on the states of state change positions so as to facilitate analysis and display of the state of a device to be controlled by providing a storage means with an ON data storage area and a state data storage area. SOLUTION: A machine tool line (device to be controlled) is monitored by the control unit and a state change position and the time of the state change are stored in a storage means in the control unit. At this time, ON data consisting of the state change position of a change from OFF to ON and its ON time are stored temporarily in order. Further, the ON data stored in the ON data storage area corresponding to the state change position of a change from ON to OFF is moved to and stored in a state data storage area of the storage means when the state change position changes from ON to OFF so that it is paired with the OFF time of the change from ON to OFF. Consequently, none of data is repeated to reduce the storage size of the data, so that more data can be stored.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention monitors a state change portion of a device to be controlled, and changes the state change portion from OFF to O.
The ON time and the state change portion that became N are temporarily stored as ON data in the ON data storage area. When the state change portion changes from ON to OFF, the stored ON data is paired with the OFF time. And a data collection method for moving and storing data from an ON data storage area to a state data storage area.

[0002]

2. Description of the Related Art A device to be controlled is controlled by a control device and periodically monitored. When the device to be controlled changes from one state to another state, the state of the changed state and its time are set to one. Are stored in the storage means of the control device in the order in which the status changes. For example, it is assumed that the control target device has a state change part A where the normal state (OFF) changes from an abnormal state (ON) and a state change part B where the power state changes between ON and OFF. Referring to FIG. 3, first, when the state changes from OFF to ON at time T1, the abnormal state change portion A and its ON time T
1 is stored in the storage unit of the control device. Next, when the state change part B changes from OFF to ON at time T2, ON data including this state change part B and its ON time T2 is stored in the storage means.
When the state changes from N to OFF, OFF data including the state change portion B and the OFF time T3 is stored. Next, at time T4
When the state change portion A changes from ON to OFF, OFF data including the state change portion A and the OFF time T4 is stored. Next, at time T5, the state change portion B is turned off.
This ON data was stored when it was turned ON from. As described above, the state change portion and the time are recorded as one set of data in the order of ON and OFF changes in the storage means (FIG. 5).

[0003]

In the prior art, since the state change data is stored in the order of time when the state changes to ON and OFF, the paired ON data and OFF data are difficult to understand, so that the data analysis time is reduced. When displaying a time chart or a time chart, a pair of ON and OFF data must be searched for and rearranged in the order of the ON time. Further, in order to know the state change portion which is ON at the present time, the ON data must be searched. At this time, all the data in the storage means is read, and it is determined whether the data is ON data. In this case, it is necessary to check that there is no OFF data in the storage means that is paired with the ON data. Further, the ON data and the O
Since FF data is recorded separately, ON data and O
There is a problem that the FF data is duplicated and the size of the data is increased. An object of the present application is to facilitate the analysis and display of the state of a control target device, facilitate the collection of data on the state of the state-changed part, and reduce the data size stored in the storage unit.

[0004]

In order to solve the above-mentioned problems, a control device for controlling a device to be controlled monitors a state change portion of the device to be controlled and controls the state change portion and the time of the state change. In a data collection method for storing data in a storage unit in an apparatus, an ON data storage area of the storage unit sequentially temporarily stores ON data including a state change portion changed from OFF to ON and an ON time at that time, In the state data storage area of the storage means, 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 changes from ON to OFF. OF
It is moved and stored so as to be paired with the F time (claim 1). The state data is stored in a state data storage area in the order of occurrence of ON data (claim 2).

[0005] As an apparatus suitable for carrying out the above method, a device to be controlled is controlled, and a state change portion of the control target device is monitored, and the state change portion and the time of the state change are stored in a storage means. OFF in the control device
The storage means is provided with an ON data storage area for temporarily and temporarily storing ON data including a state change portion that has changed from ON to ON and the ON time at that time, and determines whether the monitored state change portion is ON or OFF. Determining means for determining whether ON data corresponding to the determined state-changed part is stored in the ON data storage area.
When N data is stored in the ON data storage area, the ON state corresponding to the OFF state change part
State data generating means for adding the OFF time changed from ON to OFF to the ON data stored in the data storage area to generate state data;
Erasing means for erasing from the N data storage area, and when storing this state data in the state data storage area, compares the ON time of this state data with the ON time of other state data in the state data storage area. , And a display device capable of displaying ON data in the ON data storage area and status data in the status data storage area (claim 3).

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. Here, the machine to be controlled is a machine tool line M such as a transfer machine. The control device is a sequence controller 1 generally used to control the machine tool line M. The sequence controller 1 has a central processing unit (CP
U) 2, storage means 3, clock means 4, and an I / O interface 5 for exchanging signals with external devices. The storage means 3 is a program storage area 6 in which a state change monitor storage program, which will be described later, is stored in addition to the operation control program of the machine tool line M processed by the CPU 2, and the machine tool line M from OFF to ON.
O consisting of the state-changed part and the ON time at that time
An ON data storage area 7 for temporarily and sequentially storing N data. When a certain state-changed part changes from ON to OFF, the ON data corresponding to the state-changed part changed to OFF becomes ON.
The ON data stored in the data storage area 7
A state data storage area 8 for storing state data to which the FF time is added in chronological order in the generation of the ON data. The sequence controller 1 has I
A computer 9 is connected via an I / O interface 5. The computer 9 is connected to a display unit 10 capable of displaying ON data and status data transferred from the storage unit 3 as a time chart and the like, and a sequence controller 1. Input means 11 for giving a data transfer instruction and the like. Here, ON and OFF means that, for example, the sequence controller 1 periodically monitors the machine tool line M, and when a normal state changes at a certain state change portion and becomes abnormal, the abnormal state is detected. While it is on,
It is OFF while detecting the normal state. Display means 1
0, the input means 11 may be provided directly in the sequence controller 1.

FIG. 2 shows a monitor storage program of the sequence controller 1. Step S1 is data collection means for monitoring the state of each state-changed portion of the machine tool line M at a constant cycle and acquiring data. Step S
2, S3 and S5 constitute a judgment means. In step S2, the data of the state change part collected in step S1 is OF data.
It is determined whether it is F or ON. If the 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. If ON data is stored, step S1 is performed. Returning to step S4, if ON data is not stored, the ON data storage area 7 is turned on in step S4.
The data is stored. If the collection state is OFF, the OFF data is stored in the ON data storage area 7 in step S5.
It is determined whether or not ON data corresponding to the collection state is stored. In step S6, when the ON data corresponding to the OFF collection state is stored in step S5,
Step S7 is an erasing means for erasing the ON data taken into the state data from the ON data storage area 7, and step S8 is a erasing means for adding the OFF time to the ON data to make the state data. The rearrangement storage for comparing the ON time of the state data created in step S6 with the ON times of the other state data already stored in the state data storage area 8 and storing the state data in the order of the ON times. Means.

First, each of the status change portions to be monitored is O
It is assumed that the state is FF. As shown in FIG. 3, it is assumed that an abnormality occurs in the state change portion A at time T1 and the state changes from OFF to ON. In step S1, the sequence controller 1 monitors a state change portion of the machine tool line M and collects the state. Since the normal state is changed from OFF in the normal state to ON in the abnormal state at time T1, it is determined in step S2 that the collected state of the state change portion A is ON.
Next, in step S3, the ON determined in step S2 is performed.
It is determined whether the data is stored in the ON data storage area 7. Since the ON data is not stored in the ON data storage area 7, this ON data is stored in the ON data storage area 7 in step S4 (see FIG. 4) Return to step S1.

At time T2, for example, if the state is changed from OFF to ON at the state change portion B representing the power supply state, the state collected in step S1 is determined to be ON in step S2, and the ON data storage area is determined as shown in FIG. It is determined in step S3 that the corresponding ON data is not stored in step 7, and the ON data of the state change portion B is stored in the ON data storage area 7 in step S4, and the process returns to step S1.

Next, at time T3, the state of the state change portion B becomes O
When the state changes from N to OFF, the state collected in step S1 is determined to be OFF in step S2, and step S5 is executed. Thus, when the state is OFF, no OFF data is stored in the ON data storage area 7.
In step S5, ON data corresponding to this OFF is ON.
It is determined whether data is stored in the data storage area 7 and ON
If there is no data, the process returns to step S1. Now, as shown in FIG. 4, since ON data corresponding to the OFF data stored at time T2 is stored in the ON data storage area 7, the O data corresponding to this OFF is stored in step S6.
The OFF time T3 is added to the N data to become state data, and in step S7, the O
The N data is erased from the ON data storage area 7. As a result, the ON data and the OFF data are not separately stored in the storage unit 3 as in the related art, so that the ON data and the O data are not stored.
The recording size is reduced without storing the items that overlap with the FF 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 as shown in FIG. The data is rearranged in order and stored, and the process returns to step S1.

Next, when the state change portion A changes from ON to OFF at time T4, steps S1, S2, S5, S6, S
7 is executed, and the ON times are compared in step S8.
At this time, since the ON time T1 of the state changing part A is a time before the ON time T2 of the state changing part B, the state data of the state changing part A is stored before the state data of the state changing part B as shown in FIG. And returns to step S1 again.
Hereinafter, step S1 and subsequent steps are similarly repeated. The machine tool line M is periodically monitored by the sequence controller 1, and the time T1 to T4 of the state change portion A
Steps S1, S2, and S3 are repeated while the state change part B is ON, such as the times T2 to T3, and the state change part A is before the time T1 or the state change part B
Needless to say, steps S1, S2, and S5 are repeated during the OFF state as in times T3 to T5. By operating the input means 11 of the computer 9,
When requesting the ON data or the status data from the sequence controller 1, the ON data and the status data are transferred by an appropriate transfer method. The transferred ON and state data are stored in the ON data storage area 7 in the ON state which is currently ON.
Only the data is recorded in the order of the ON time, and only the state data of the pair of ON and OFF are recorded in the state data storage area 8 in chronological order of the ON time. When it is desired to display only the ON data, there is no need to check all the ON and OFF data stored and search for the ON data as in the conventional case, and only display the data in the ON data storage area. Also, when the status data is displayed as a time chart, for example, as shown in FIG. 3, since the ON and OFF times are included as a set, the time interval can be easily converted to a screen display scale. And display is easy.

[0012]

As described above, according to the present invention, only ON data that is ON is temporarily stored in the ON data storage area.
When the ON data is turned OFF, the ON data is moved and stored from the ON data storage area to the state data storage area so as to be paired with the OFF time. Therefore, duplication of each data is eliminated, the data storage size can be reduced, and Data can be stored in the storage means. In addition, since the state data is stored in the order of the occurrence time of the ON data, the display on the display means is easy. Further, only ON data that is ON at the present time is stored in the ON data storage area, and only state data is stored in the state data storage area. Since there is no need to search for and search, efficiency is high, and analysis and display are easy.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a device of the present application.

FIG. 2 is a flowchart showing a monitor storage program.

FIG. 3 is a time chart of a monitored state change portion of the machine tool system.

FIG. 4 is an explanatory diagram showing a procedure for storing ON data and status data in a storage unit.

[Explanation of symbols]

 Reference Signs List 1 Sequence controller (control device) 3 Storage means 7 ON data storage area 8 State data storage area M Device to be controlled (machine tool line)

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[Procedure amendment]

[Submission date] November 18, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a device of the present application.

FIG. 2 is a flowchart showing a monitor storage program.

FIG. 3 is a time chart of a monitored state change portion of the machine tool system.

FIG. 4 is an explanatory diagram showing a procedure for storing ON data and status data in a storage unit.

FIG. 5 is an explanatory diagram showing conventional data storage.

[Description of Signs] 1 Sequence controller (control device) 3 Storage means 7 ON data storage area 8 State data storage area M Controlled equipment (machine tool line)

Claims (3)

[Claims] In a data collection method, a control device for controlling a control target device monitors a state change portion of the control target device and stores the state change portion and a time of the state change in a storage unit in the control device. In the ON data storage area of the storage means, the ON data including the state change portion changed from OFF to ON and the ON time at that time is sequentially and temporarily stored. When the part changes from ON to OFF, 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 the ON data changes from ON to OFF. A state data collection method, comprising: 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 of occurrence of the ON data. 3. A control device for controlling a device to be controlled, monitoring a state change portion of the device to be controlled, and storing the state change portion and a time of the state change in a storage means, wherein the control device changes from OFF to ON. An ON data storage area for sequentially and temporarily storing ON data including a state change portion and ON time at that time is provided in the storage means, and it is determined whether the monitored state change portion is ON or OFF. A determination means is provided for determining whether ON data corresponding to the state-changed part is stored in the ON-data storage area, and the determination means determines that the state-changed part is OFF and stores the corresponding ON data in the ON-data storage area. If it has been changed from ON to OFF, the ON data stored in the ON data storage area corresponding to the OFF state change portion is changed. State data generating means for adding the converted OFF time to the state data, and erasing means for erasing the ON data of the state data from the ON data storage area, when the state data is stored in the state data storage area. A rearrangement storage unit for comparing the ON time of the state data with the ON times of other state data in the state data storage area and rearranging the ON data in the order of occurrence of the ON data, and storing the ON data and the state data in the ON data storage area. A control device comprising a display device capable of displaying state data of an area.