JPH06168152A - Task degeneracy managing device - Google Patents

Abstract

PURPOSE:To suppress the influence of abnormality of input/output to a minimum and to improve labor saving when development is performed and maintainability after starting an operation by automatically storing a task to which degeneracy is applied at every input/ output when the abnormality occurs. CONSTITUTION:This device is equipped with task degeneracy memory 4 in which each degenerative input/output is stored, input/output information memory 5 in which corresponding input/output at every task is stored, reference storage 7a, 8 in which a corresponding task at every degenerative input/output stored in the task degeneracy memory 4 out of each task stored in the input/output information memory 5 is stored, a task readout means 10a which reads out the task corresponding to the abnormality from the reference storage means 7a, 8 when input/output abnormality is detected by an input/output controller 2, and a task degeneracy request means 1a which sends out a task degeneracy request in accordance with the task read out at the task readout means 10a to a task execution controller 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a task degeneracy management device that degenerates only a task corresponding to this input / output when an abnormality occurs in the input / output, and particularly omits manual setting work of the task to be degenerated. The present invention relates to a task degeneracy management device that can improve efficiency of program development and maintainability after operation.

[0002]

2. Description of the Related Art Conventionally, with the increase in scale of various plant equipment and the complexity of process control, the programmable controller for performing process control of the equipment has been significantly increased in capacity, and complicated and diversified programs have been stored. There is.

In such a programmable controller, when an abnormality occurs in at least one of the input and the output (hereinafter referred to as input / output), the abnormality propagates to the entire process control and the program controller 1 concerned. There is a possibility to stop the platform.

Therefore, a task degeneracy management technique is considered in which only the task corresponding to the abnormality is stopped so that the abnormality of one external input / output does not spread to the entire process control. In this kind of task degeneracy management technology, the program creator designates in advance the task to be degenerated corresponding to the abnormality of the external input / output, and when the abnormality occurs, the abnormality is dealt with based on this designation. It is possible to stop only the task.

[0005]

However, in the task degeneracy management technique as described above, a task to be degenerated is manually specified, which is very troublesome.

[0006] For example, a task that needs to be degenerated in response to an abnormality in one external input / output often uses the same external input / output for various tasks, and therefore manual designation is complicated. is there.

Further, the manual designation has a problem that the program development period and the cost are greatly influenced by the plant equipment, the process control method, and the amount of external input / output. Furthermore, if there is an increase / decrease in external input / output or a change in the program after operation, it is quite difficult to properly and promptly modify the program.

Moreover, since the degenerated task cannot be recovered only by the program which specifies the degenerated task,
There is a problem that the operating rate of the program controller decreases.

The present invention has been made in consideration of the above-mentioned circumstances, and automatically stores a task to be degenerated when an abnormality occurs for each input / output, thereby minimizing the influence of the abnormality of the input / output. It is an object of the present invention to provide a task degeneracy management device capable of improving the labor saving during development and the maintainability after the operation as well as the above.

Another object of the present invention is to recover an abnormality by degenerating a task and then automatically transmitting an abnormality recovery request for an abnormality, and by transmitting a task return request after the abnormality recovery. It is possible to improve the operability of the task execution control device by quickly performing the restoration of the degenerated task.

[0011]

The invention according to claim 1 is connected to a task execution control device for executing a plurality of tasks and an input / output control device for controlling a plurality of input / output, wherein the input / output control device is When an abnormality is detected, a task degeneracy management apparatus that manages the degeneracy of tasks of the task execution control apparatus in response to the abnormality, in which a plurality of degeneration-enabled I / Os among the respective I / Os are stored. A memory, an input / output information memory in which each input / output corresponding to each task is stored, and each of the tasks stored in the input / output information memory, each of which is stored in the task degeneracy memory When the input / output controller detects an abnormality in the input / output, the reference storage means for storing the task corresponding to the degenerate input / output and the input / output of the abnormality from the reference storage means. The task degenerate management apparatus comprising: a reading task reading means a task corresponding, and a task degeneration request means for sending a task degenerate request corresponding to the read out task by the task reading means in the task execution control device.

According to a second aspect of the invention, in the invention according to the first aspect, an internal input / output information memory in which internal input / output corresponding to each task is stored, and the input / output information memory is stored. Of the stored tasks, a task corresponding to each degenerate-allowed input stored in the task degeneracy memory is stored, and an internal output corresponding to each stored task is stored from the internal input / output information memory. The internal reference storage means for storing the task corresponding to each internal input from the internal input / output information memory and the input / output control device detected an abnormality in the input while performing the search In this case, the internal task read means for reading the task corresponding to the input of the abnormality from the internal reference storage means and the task read by the internal task read means. The task degenerate management system obtained by adding an internal task degeneration request means for sending a task degenerate request corresponding to click in the task execution control unit.

According to a third aspect of the invention, in the invention according to the second aspect, when a task degeneration request is sent by the task degeneration requesting means or the internal task degeneration requesting means, the input / output control device causes an abnormality. Is sent to the input / output control device, and an abnormal recovery request is sent by the abnormal recovery requesting means, and when the abnormal condition is recovered, It is a task degeneration management device to which task degeneration requesting means or task restoration requesting means for sending a task restoration request corresponding to a task degeneration request sent by the internal task degeneration requesting means to the task execution control device is added.

[0014]

Therefore, the invention corresponding to claim 1 is adapted to the task degeneracy memory in which a plurality of degenerate I / Os are stored and each task by taking the above means. An input / output information memory in which each input / output is stored is provided, and the reference storage unit corresponds to each degenerate input / output stored in the task degeneracy memory among the tasks stored in the input / output information memory. When the input / output control device detects an abnormality in the input / output, the task reading means reads the task corresponding to the input / output of the abnormality, and the task degeneration requesting means reads the task. A task degeneration request corresponding to the task read by the means is sent to the task execution control device.

Thus, by automatically storing in advance for each input / output the task to be degenerated when an abnormality occurs, the influence of the abnormality of the input / output can be minimized, and labor saving at the time of development and after operation can be achieved. The maintainability of can be improved.

Further, the invention according to claim 2 is provided with an internal input / output information memory in which internal input / output corresponding to each task is stored, and the internal reference storage means stores the internal input / output information memory. Among the respective tasks, the task corresponding to each degenerate-allowed input stored in the task degeneracy memory is stored, and the internal output corresponding to each stored task is retrieved from the internal input / output information memory. , The searched internal output is taken as internal input,
A task corresponding to each internal input is stored from the internal input / output information memory. In the internal task reading means, when the input / output control device detects an abnormality in the input, the task corresponding to the abnormality input from the internal reference storage means. Is read out, and the internal task degeneration request means sends a task degeneration request corresponding to the task read by the internal task reading means to the task execution control device. This makes it possible to obtain the same effects as those described above even for tasks that perform input / output only within the task execution device.

In the invention according to claim 3, in the abnormal recovery request means, when the task degeneration request is sent by the task degeneracy request means or the internal task degeneracy request means,
An abnormality recovery request corresponding to an input / output for which an abnormality is detected by the input / output control device is sent to the input / output control device, and the task recovery request means sends the abnormal recovery request by the abnormal recovery request means and When recovered, a task restoration request corresponding to the task degradation request sent by the task degradation requesting means or the internal task degradation requesting means is sent to the task execution control device.

Thus, by degenerating a task, automatically sending an abnormal recovery request for an abnormality, and sending a task return request after the abnormal recovery, the abnormality is recovered and the degenerated task is returned. It is possible to rapidly perform and to improve the operability of the task execution control device.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the arrangement of a task degradation management apparatus according to an embodiment of the present invention. In this task degeneration management device, an external input / output control device 2 and a task execution control device 3 are connected to the management device main body 1, and task execution control is performed in response to detection of an external input / output error by the external input / output control device 2. Of the plurality of tasks executed by the device 3, only the task corresponding to the abnormality is degenerated.

Here, the management apparatus main body 1 is a task degeneracy registration file 4 in which a task degeneracy is possible and an external input / output name / address serving as a trigger is registered, and an external input / output name / address / object for each task. It has an external input / output information file 5 in which information such as information is registered and an internal input / output information file 6 in which information such as internal input / output name / address / object is registered for each task. Is connected to the reference creating unit 7.

The reference creating unit 7 is composed of an external input / output reference creating unit 7a and an internal reference creating unit 7b, and based on the information in each of the files 4, 5, and 6 described above.
Corresponding to the degenerate external input / output, task degenerate information consisting of name / address / input / output task number / input / output task number sequence is created and written to the external input / output reference storage unit 8 or the internal input / output reference storage unit 9. Put in.

On the other hand, the automatic task selection unit 10 includes an external input / output task batch selection unit 10a and an internal input / output batch selection unit 1
0b, in response to the detection of an input / output abnormality by the external input / output control device 2, the task reduction information corresponding to the abnormality is selected from the task reduction information in each of the reference storage units 8 and 9.

The request control unit 11 is composed of a task degeneration request unit 11a, an external input / output abnormality recovery request unit 11b, and a task restoration request unit 11c, and based on the task degeneracy information selected by the task automatic selection unit 10. The task execution control device 3 is created by creating a task reduction request and a task return request.
In addition to sending to the external input / output control device 2, an abnormal recovery request is created and sent to Next, the operation of the task degeneracy management device configured as described above will be described.

First, the external input / output reference creating section 7a
Then, the name / address of the external input / output capable of reducing the task is read from the task reduction registration file 4, and based on the external input / output name / address, from the external input / output information file 5 for each external input / output. It is searched for which task the external input / output is, and the name / address of the external input / output, the number of input / output tasks indicating the number of tasks for each external input / output, and the input / output task number string of the task to be degenerated Are created and written in the external input / output reference storage unit 8, respectively.

Similarly, the internal input / output reference creating unit 7
In b, the name / address of the external input that can reduce the task is read from the task reduction registration file 4, and based on the name / address of the external input, which task is input from the external input / output information file 5 for each external input. It is searched whether the external input is made, and the name / address of the external input, the number of input tasks for each external input, and the task number string are created.
Written in.

Further, in the internal input / output reference creating section 7b, the internal input / output information file 6 is searched for where the data is internally output for each written task, and the internally output data is output. Is internally retrieved as an internal input to any one of them, and the task is internally recursively searched, added to the previous input task number and input task number string, and written in the internal input / output reference storage unit 9. In this state, first, the case where an abnormality occurs in the external input / output will be described.

When an abnormality occurs in the external input / output, the external input / output control device 2 detects the abnormality and sends an abnormality detection signal indicating the name / address of the corresponding external input / output to the task automatic selection section 10. .

In the external input / output task batch selection unit 10a of the automatic task selection unit 10, the task degeneration information corresponding to the external input / output in which the abnormality is detected is stored in the external input / output reference storage unit based on the abnormality detection signal. It is read from 8 and sent to the request control unit 11.

Further, in the task degeneration request unit 11a of the request control unit 11, a task degeneration request corresponding to the degenerating task is issued based on the number of input / output tasks and the input / output task number sequence in the task degeneration information. It is created and sent to the task execution control device 3. In the task execution control device 3, the execution of the task corresponding to this task degeneration request is stopped.

Further, the external input / output abnormality recovery requesting portion 11b of the request control portion 11 responds to the external input / output in which the abnormality is detected based on the external input / output name / address in the task degeneracy information. An abnormal recovery request is generated and sent to the external input / output control device 2. In the external input / output control device 2, the abnormality recovery processing corresponding to the abnormality is executed based on the abnormality recovery request to recover the abnormality.
It should be noted that this abnormality recovery process is performed by, for example, an IC corresponding to the abnormality.
Is an initialization process of.

Further, in the task restoration request unit 11c of the request control unit 11, when the abnormality is recovered, the degenerated task is dealt with based on the number of input / output tasks and the input / output task number sequence in the task reduction information. A task return request to perform is created and sent to the task execution control device 3. In the task execution control device 3, the degeneration of the task is released and the task is executed based on this task return request. Next, a case where an abnormality occurs in the external input will be described. In this case, the operation for the abnormality of the external input / output described above is also performed in parallel.

When an abnormality occurs in the external input, the abnormality is detected in the external input / output control unit 2 and the abnormality detection signal indicating the name / address of the corresponding external input is sent to the task automatic selection unit 10 as described above. To be done.

In the internal input / output task batch selection unit 10b of the automatic task selection unit 10, based on this abnormality detection signal, the task degeneracy information corresponding to the external input in which the abnormality is detected is stored in the internal input / output reference storage unit 9. Read from
It is sent to the request control unit 11.

Thereafter, similarly, the request control unit 11 creates a task reduction request based on the task reduction information and sends it to the task execution control device 3. When the task is degenerated by this task degeneration request, an abnormal recovery request is created and sent to the external input / output control device 2. In the external input / output control device 2, when the abnormality is recovered, an abnormality recovery signal is sent to the task return request unit 11c. In the task restoration request unit 11c, the task restoration request is sent to the task execution control device by this abnormal recovery signal. In the task execution control device 3, the degeneracy of the task is released and the task is executed.

As described above, according to this embodiment, the task degeneracy registration file 4 in which the degenerate external input / output of each input / output is stored, and each external input / output corresponding to each task is stored. An external input / output information file 5 in which information is stored and an internal input / output information file 6 in which internal input / output information corresponding to each task is stored are provided.

As a result, the external input / output reference creating unit 7a reads the external input / output information file 5 for each degradable input / output stored in the task degenerate registration file 4 and creates corresponding task degenerate information. Write to the external input / output reference storage unit 8.

Further, the internal input / output reference creating section 7b
Of the task information stored in the external input / output information file, the task input / output reference storage unit 9 creates task reduction information corresponding to each reduction-allowed input stored in the task reduction registration file 4. Write to. Further, the internal output corresponding to the task degradation information is searched from the internal input / output information file 6, and this internal output is used as an internal input, and the task degradation information corresponding to each internal input is obtained from the internal input / output information file 6. It is additionally created and written in the internal input / output reference storage unit 6.

Therefore, when the input / output control device 2 detects an abnormality in the input / output, the external input / output task batch selection unit 10a.
Reads out the task degradation information corresponding to the abnormality from the external input / output reference storage unit 8, and the task degradation request unit 11a sends a task degradation request corresponding to this task degradation information to the task execution control device 3 3 stops the execution of the task corresponding to this task degeneration request.

When the input / output control device 2 detects an abnormality in the input, the internal input / output task batch selection unit 10b reads out the task degeneracy information corresponding to the abnormality from the internal input / output reference storage unit 9, and the same as described above. Task reduction request unit 11
a sends a task degradation request corresponding to this task degradation information to the task execution control device 3, and the task execution control device 3
Stops the execution of the task corresponding to this task reduction request.

As described above, by automatically storing the task to be degenerated in the event of an abnormality for each input / output in advance, the task to be degenerated in the event of an input / output abnormality is minimized to the task execution control apparatus. While ensuring the operability of 3,
It is possible to improve labor-saving during development and maintainability for modification of external input / output after operation.

Further, in this embodiment, when the external input / output abnormality recovery requesting unit 11b sends a task degradation request by the task degradation requesting unit 11a, an abnormal recovery request corresponding to the input / output in which the abnormality is detected is input. In the task recovery request unit 11c, the external input / output abnormal recovery request unit 11b sends an abnormal recovery request, and when the abnormal condition is recovered, the task degeneration request unit 11a is sent to the output control device 2.
A task return request corresponding to the task degeneration request sent by is sent to the task execution control device 3.

As described above, after the task is degenerated, the abnormal recovery request for the abnormality is automatically transmitted, and the task recovery request is transmitted after the abnormal recovery, thereby recovering the abnormality and recovering the degenerated task. By rapidly performing the above, the operability of the task execution control device 3 can be improved. The present invention can be variously modified and implemented without departing from the scope of the invention.

[0044]

As described above, the present invention has the following effects.

According to the first and second aspects of the present invention, a task degeneracy memory, an input / output information memory and an internal input / output information memory are provided, and the reference storage means and the internal reference storage means refer to each of the memories and degenerate when an abnormality occurs. Possible tasks are stored, and when the input / output is abnormal, the task reading means and the internal task reading means read the degenerate task and the task degeneration request means sends out the degeneration request of the task. By automatically storing the task to be degenerated when an abnormality occurs for each input / output in advance, the effect of the input / output abnormality can be minimized, and labor saving during development and maintainability after operation can be improved. .

According to the third aspect of the invention, the abnormality recovery request means sends an abnormal recovery request in response to the sending of the task degeneration request, and when the abnormality is recovered, the task restoration request means sends the degeneration request. Since the task recovery request is sent out, the task is degenerated, the abnormal recovery request for the abnormality is automatically sent, and the task recovery request is sent after the abnormal recovery to recover the abnormality. It is possible to improve the operability of the task execution control device by quickly performing the restoration of the degenerated task.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a task degradation management device according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Management device main body, 2 ... External input / output control device, 3 ... Task execution control device, 4 ... Task degradation registration file, 5 ... External input / output information file, 6 ... Internal input / output information file,
Reference numeral 7 ... Reference generating unit, 7a ... External input / output reference generating unit, 7b ... Internal input / output reference generating unit, 8 ...
External input / output reference storage unit, 9 ... Internal input / output reference storage unit, 10 ... Task automatic selection unit, 10a ... External input / output task batch selection unit, 10b ... Internal input / output task batch selection unit, 11 ... Request control unit, 11a ... task degeneration request unit, 11b ... external I / O error recovery request unit, 11c ... task return request unit.

Claims (3)

[Claims] 1. A task execution control device for executing a plurality of tasks and an input / output control device for controlling a plurality of inputs / outputs, and when the input / output control device detects an abnormality, the above-mentioned operation is performed in response to the abnormality. In a task degradation management device that manages task degradation of a task execution control device, a task degradation memory in which a plurality of degenerate I / Os are stored among the respective inputs and outputs, and the respective input corresponding to each task. An input / output information memory in which an output is stored, and a reference storage that stores, among the tasks stored in the input / output information memory, a task corresponding to each shrinkable input / output stored in the task shrinkage memory And a task reading means for reading a task corresponding to the input / output of the abnormality from the reference storage means when the input / output control device detects an abnormality in the input / output. When the task degenerate management apparatus characterized by comprising a task degeneration request means for sending a task degenerate request to the task execution control device corresponding to the read out task by the task reading means. 2. The task degeneracy management device according to claim 1, wherein an internal input / output information memory in which internal input / output corresponding to each task is stored, and each task stored in the input / output information memory Among these, a task corresponding to each degenerate input that is stored in the task degeneracy memory is stored, and an internal output corresponding to each stored task is retrieved from the internal input / output information memory, and An internal reference storage means for storing the task corresponding to each internal input from the internal input / output information memory using the searched internal output as an internal input, and the internal reference when the input / output control device detects an abnormality in the input. An internal task reading means for reading a task corresponding to the input of the abnormality from the storage means, and a task corresponding to the task read by the internal task reading means. Task degenerate management apparatus characterized by the addition of an internal task degeneration request means for sending a task degenerate request to the task execution control device. 3. The task degradation management apparatus according to claim 2, wherein when the task degradation request is sent by the task degradation requesting means or the internal task degradation requesting means, an error detected by the input / output control device is detected. Abnormal recovery request means for sending an abnormal recovery request corresponding to the output to the input / output control device; and an abnormal recovery request sent by the abnormal recovery request means, and when the abnormal condition is recovered, the task degeneration request means or A task degeneracy management device further comprising task restoration requesting means for transmitting a task restoration request corresponding to the task degeneration request sent by the internal task degeneration requesting means to the task execution control device.