JP3546518B2 - Table changing method and its information processing system - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an information processing system in which a plurality of information processing devices operating in accordance with a constant table of a memory exchange data with each other via a transmission path such as a system bus. Table changing method for changing task processing of another information processing device (hereinafter, referred to as an extension unit) by changing a constant from a main information processing device having a stored memory (hereinafter, referred to as a common unit) and its information processing system About.
[0002]
[Prior art]
FIG. 4 is a configuration diagram of an information processing system used in the present invention and the related art, and FIG. 3 is an explanatory diagram illustrating a task processing changing method used in the related art.
First, FIG. 4 will be described. In FIG. 4, only a single extension unit 2 is shown in the information processing apparatus constituting the common unit 1 and in the illustrated example. However, the information processing apparatuses constituting a plurality of extension units 2 include power supplies 1A, 2A. , Microprocessor units (MPU) 1B, 2B..., Memories (MEM) 1C, 2C..., Input / output devices (I / O) 1E, 2E. Units (IF) 1D, 2D,... Each of the information processing apparatuses 1, 2,... Is connected to the transmission path 9 to form an information processing system.
[0003]
FIG. 3 is an explanatory diagram illustrating a driving method (task processing change method) of the information processing system in which the task processing of the expansion unit is changed by changing the constant from the common unit according to the related art in the information processing system having such a configuration. is there. In FIG. 3, a constant table 10 of the common unit 1 is used for executing the tasks 11 to 13 of the common unit 1, and also transmitted by the extension unit 2 to use a part of the constants stored in the constant table 10. The processing unit 19 transmits constants necessary for task processing (tasks 21 and 22 in the illustrated example) of the extension unit 2. The extension unit 2 receives these constants transmitted from the common unit 1 via the reception processing unit 29 and stores the constants in the common unit constant table 20. In the illustrated example, of the tasks 21 to 24 executed by the extension unit 2, the tasks 21 and 22 which operate using the constants transmitted from the common unit 1 and stored in the common unit constant table 20 are stored in the constant table 20. There are tasks 23 and 24 that do not use the set constants and operate with the constants stored in the memory of the extension unit 2 itself.
[0004]
[Problems to be solved by the invention]
However, in the table changing method of the information processing system and the information processing system as described above, when it is necessary to change the constant table of the common unit, each related information is determined based on uncertain information generated during the change. In order to prevent the information processing apparatus from malfunctioning, it is necessary to stop the tasks 11 to 13 of the common unit and the tasks 21 and 22 of the extension unit. In the related art, when the necessity of such a change arises, the power of the extension unit is turned off to stop the microprocessor unit (MPU) of the extension unit. For this reason, there has been a problem that the execution of the tasks 23 and 24 irrelevant to the constant table 20 is stopped.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to solve the above-described problems and to execute a corresponding task without stopping the entire extended unit even when changing the table of the common unit. It is an object of the present invention to provide a table changing method and a data processing system for stopping only the operation of the common unit and resuming the execution of the task after the completion of the table changing of the common unit.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a table change method according to the present invention is an information processing system in which a plurality of information processing devices operating according to constants written in a memory exchange data with each other via a transmission path. A constant table storing constants used by the processing devices is stored in the memory of one main information processing device (common unit), and the other information processing devices (extension units) are configured to store at least constants transmitted from the common unit. In the table changing method for changing the task processing of the extension section by changing the constant of the common section, the common section includes the task processing of the extension section when the constant of the constant table of the task processing is changed. Sends a stop command for task processing that operates according to the constant table, and when the constants in the task processing constant table have been changed, the constants are expanded. When the transmission of the constants in the constant table is completed, the execution unit transmits a task processing execution instruction that has transmitted the stop instruction. The extension unit transmits the task processing constant table constant and the task processing execution / stop instruction from the common unit. And the task to which the execution / stop instruction instructs execution executes the task processing according to the constant received from the common unit or the constant of the extension unit itself, and the execution / stop instruction instructs stop. The task does not execute the task processing.
[0007]
Further, in order to realize the above-described table changing method, the information processing system according to the present invention operates according to constants written in the memory, and has a memory for storing a constant table for storing constants used by each information processing apparatus. Main information processing devices (common units) and at least another information processing device (extended unit) having task processing that operates according to constants transmitted from the common units, In the information processing system, which changes the task processing of the extension unit by changing the constant of the common unit, the common unit includes the transmission unit for changing the constant of the task processing constant table. Command to stop the task processing that operates according to the constant table in the task processing of, and stops when the transmission of the constant in the changed constant table ends And an instruction output means for instructing an execution instruction of the task processing to which the instruction has been transmitted, and a means for transmitting an execution / stop instruction of the task processing of the extension unit and a constant of the changed constant table. Means for receiving a task processing execution / stop command from the section, determination means for determining execution / stop of the task processing by the task processing execution / stop command, and receiving a constant from the common section and receiving the constant from the common section. Means for storing in a constant table, the execution / stop of the task processing is selectively performed by a task processing execution / stop instruction from the common unit.
[0008]
In addition, instead of including a determination unit that determines execution / stop of the task processing based on an execution / stop command from the common unit, the extension unit includes a registration change processing unit that manages the execution / stop command from the common unit in a registration file. Means for deleting / re-registering registration data for execution / stop of the task processing by the registration change processing means, and execution order management for controlling execution / stop of each task by means of the registration data deletion / re-registration means Means.
[0009]
[Action]
According to the configuration described above, in the first aspect, before changing the constant table of the common unit, a stop instruction for stopping execution of a specific task process from the common unit to the extension unit is issued, and after the change is completed, the task process is stopped. Issue an operation command to cause execution. The task processing of the extension unit refers to an instruction from the common unit before executing the task processing, and suspends the execution of the task processing if the instruction is a stop instruction. As a result, it is possible to prevent a malfunction based on uncertain information generated during the change of the constant in the constant table in the common unit.
[0010]
Further, in the second invention, the registration change processing means of the extension unit refers to the instruction from the common unit and deletes / re-registers the registration data of operation / stop for execution of the task processing. The execution / stop of each task is controlled by the order management means by the deletion / re-registration means of the registration data. Therefore, each task does not need to refer to the instruction from the common unit, so that the structure of the program is simplified, and it is possible to use the program of the existing task without instruction reference processing without modifying the program. .
[0011]
【Example】
FIG. 1 is an explanatory diagram for explaining a task processing method according to an embodiment of an information processing system according to the first invention, and FIG. 2 is an explanatory diagram for explaining a task processing method according to another embodiment, and corresponds to FIGS. The same reference numerals are given to the same functional members.
1 will be mainly described with reference to FIG. In FIG. 1, an information processing system includes a plurality of information processing apparatuses 1, 2,... Operating in accordance with constants written in memories (1C, 2C), mutually exchanging data via a transmission line 9, and The constant table 10 storing the constants used by 1, 2,... Is stored in the memory (1C) of one main information processing device (hereinafter, referred to as a common unit) 1 and stored in another information processing device (hereinafter, referred to as an extension unit). 2) have at least task processes (21A and 22A in the illustrated example) that operate in accordance with the constants transmitted from the common unit 1. By changing the constants of the common unit 1, the task processes of the extension units 2. 21A, 22A,... Can be changed. Hereinafter, the extension units 2 will be described with the extension unit 2 as a representative example.
[0012]
In this information processing system, even when the constant table 10 of the common unit 1 is changed, only the corresponding task processing (21A, 22A) is stopped without stopping the entire extension unit 2, and the table change of the common unit 1 is completed. Thereafter, in order to configure a table changing method and an information processing system in which the execution of the task processing (21A, 22A) can be resumed, in the embodiment based on the first invention, the common unit 1 executes the task processing 21A of the extension unit 2 Instruction output means 15 for instructing the execution / stop instructions of .about.24A, and means (transmission processing section) 19 for transmitting the execution / stop instructions of the task processing 21A.about.24A of the extension section 2 and the constants of the constant table 10. Prepare.
[0013]
Further, the extension unit 2 stores a means (reception processing unit) 29 for receiving the execution / stop instruction of the task processing 21A to 24A from the common unit 1, and stores the received execution / stop instruction of the task processing 21A to 24A. It comprises an execution / stop command unit 25, a constant from the common unit 1, a common unit constant table 20 for storing the received constants, and task processes 21A to 24A. Note that the task processes 21A to 24A include a determination unit 21B to 24B that determines execution / stop of the task process 21A to 24A based on an instruction from the execution / stop instruction unit 25, a corresponding task process 21 to 24, Consists of
[0014]
In such a configuration, the task processes 11, 12, and 13 of the common unit 1 perform tasks determined by constants described in the constant table 10 based on numerical values such as the number of data, the number of operations, and comparison data. Processing is executed. Since the constant table 10 includes data used by the task processes 21A and 22A of the extension unit 2, the constants used in the extension unit 2 by the transmission processing unit 19 are sent to the extension unit 2. . The reception processing unit 29 of the extension unit 2 transfers this constant to the common unit constant table 20. Before executing the respective task processes, the task processes 21A to 24A refer to the instruction of the execution / stop instruction unit 25, and execute the task process if the instruction is an execution instruction. The command of the execution / stop command unit 25 is output by the command output unit 15 of the common unit 1 and transmitted through the transmission processing unit 19 and the reception processing unit 29.
[0015]
When changing the constant table 10 while the common unit 1 and the extension unit 2 are operating, the task processes 11, 12, and 13 are stopped, and the instruction output unit 15 stops the task processes 21A and 22A for the extension unit 2. Send instructions. Since the instruction of the execution / stop instruction unit 25 of the extension unit 2 is rewritten according to the stop instruction, the task processes 21A and 22A using the common unit constant table 20 stop the task processes 21 and 22.
[0016]
Next, after the change of the constant table 10 of the common unit 1 is completed and the transfer to the common unit constant table 20 of the extension unit 2 is completed, the instruction output unit 15 outputs the execution instruction of the task processing 21A, 22A. The extension unit 2 stores the execution instructions of the task processes 21A and 22A received from the common unit 1 in the execution / stop instruction unit 25, and executes the previously stopped task processes 21 and 22. As described above, the task processes 21A and 22A eliminate the possibility of malfunction even when the common part constant table 20 being changed is used, and do not stop the task processes 23A and 24A irrelevant to the common part constant table 20. Driving can be continued.
[0017]
In summary, the extension unit 2 selectively executes / stops the task processing according to the execution / stop instruction of the task processing 21A to 24A from the common unit 1. The task processes 21A and 22A receive the execution / stop command of the task process (21A to 24A) from the common unit 1 and the constant from the constant table 10 and execute the operation / stop command according to the received constant. The task processing 21A, 22A is selectively executed. In the illustrated example, since the task processes 21A and 22A operate using the constants of the common unit 1, when the constants of the common unit 1 are changed, the task processes 21A and 22A are set to a stop instruction and the task processes 21A and 22A are stopped. I do. On the other hand, since the task processes 23A and 24A do not operate using the constant of the common unit 1 but operate using the constant of the extension unit 2, the task processes 23A and 24A are executed by the execution / stop command. When the execution of 24A is selected, the task processing 23A, 24A is executed.
[0018]
FIG. 2 shows another embodiment according to the second invention. 2 differs from FIG. 1 in that execution / stop of the tasks (21 to 24) incorporated in the task processes (21A to 24A) illustrated in FIG. Instead of providing the judging means (21B to 24B) for judging the stop, the extension unit 2 includes a registration change processing unit 26 that manages the execution / stop instruction from the common unit 1 in the registration file 27, and the registration change processing unit 26. Means for deleting / reregistering registration data for execution / stop of the task processes 21 to 24, and execution order management means for controlling execution / stop of each task process by means of this registration data deletion / re-registration means 27 28.
[0019]
In such a configuration, the registration change process 26 always refers to the instruction of the execution / stop instruction unit 25. If the instruction is a stop instruction, the registration of the corresponding task process is deleted from the task registration table 27. Register The execution order management function 28 activates only the task processes registered in the task registration table 27.
When the common unit 1 and the extension unit 2 change the constant table 10 during operation, a stop command is issued to the task processes 21 and 22 of the execution / stop command 25, and the registration change processing unit 26 stores the stop command in the task registration table 27. The registration of the task processes 21 and 22 is deleted. Since the execution order management function 28 activates only the registered task processes 23 and 24 in the registration table 27, the task processes 21 and 22 stop the processes. With the above-described table change method and the configuration of the information processing system, the task processes 21 and 22 do not have a risk of malfunctioning using the common part constant table 20 during the table change, and at the same time, the The operation can be continued without stopping the task processes 23 and 24 that do not exist.
[0020]
【The invention's effect】
As described above, according to the configuration of the present invention, the task processing of the information processing system is changed and the content of the job is changed only by changing the table in the common unit without performing any operation on the expansion unit. be able to. Therefore, it is possible to obtain effects such as a reduction in the work time when changing the table, a reduction in the number of workers, and a reduction in work errors. This can have a remarkable effect when a large number of expansion units are connected to the system bus, or when the common unit and the expansion units are geographically separated.
[0021]
In addition, for devices that cannot be stopped due to the effects on peripheral devices, such as during data collection and communication processing, even if there is a minor change such as a change in the failure display content of the self-diagnosis process, information processing is not performed. Since the execution can be performed without stopping the entire system, the operation rate of the entire information processing system can be improved.
[0022]
Further, in the second invention, in addition to the above-described effects, the process of determining the execution / stop instruction is not required for each task process, so that the entire processing program amount can be reduced. In addition, many existing task processing programs that do not have such determination processing can be mounted on an information processing apparatus without being changed, so that the development cost when developing an information processing system can be reduced. Can be.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram illustrating a task processing method according to one embodiment of the present invention. FIG. 2 is an explanatory diagram illustrating a task processing method according to another embodiment. FIG. 3 is a diagram illustrating a task processing changing method used in the prior art. FIG. 4 is a configuration diagram of an information processing system.
1 Main information processing device 10 Constant tables 11 to 13, 21 to 24, 21A to 24A Task processing 15 Command output unit 19 Transmission processing unit 2 Other information processing devices 20 Common unit constant tables 21B to 24B Judgment unit 25 Execution / stop instruction Unit 26 task registration change processing means 27 task registration table 28 execution order management function 29 reception processing means 1A, 2A power supplies 1B, 2B microprocessor units 1C, 2C memories 1D, 2D interface units 1E, 2E I / O devices

Claims (3)

An information processing system in which a plurality of information processing devices operating according to constants written in a memory exchange data with each other via a transmission line, and a constant table for storing constants used by each information processing device includes one main table. The information processing device (hereinafter, referred to as a common unit) stores the information in a memory, and another information processing device (hereinafter, referred to as an extended unit) has at least task processing that operates according to a constant transmitted from the common unit. In the table changing method for changing the task processing of the extension unit by changing the constant of the unit,
The common unit transmits a task processing stop instruction that operates in accordance with the constant table in the task processing of the extension unit when the constant of the task processing constant table is changed, and transmits the constant when the change of the constant of the task processing constant table is completed. When the transmission of the constant in the constant table is completed, the execution instruction of the task process that transmitted the stop instruction is transmitted to the extension unit,
The extension unit receives a constant in the task processing constant table and a task processing execution / stop instruction from the common unit. The task whose execution / stop instruction instructs execution is the constant received from the common unit. Alternatively, the table changing method is characterized in that the task processing is executed according to a constant of the extension unit itself, and the task for which the execution / stop instruction instructs stop does not execute the task processing. One main information processing device (hereinafter, referred to as a common unit) having a memory that operates according to the constants written in the memory and stores a constant table that stores constants used by each information processing device; And a transmission path for mutually exchanging data between the common unit and the extended unit, the information processing device having a task process that operates according to a constant transmitted from the common unit. In the information processing system that changes the task processing of the extension unit by changing the constant of
The common part instructs a stop instruction of the task processing that operates according to the constant table in the task processing of the extension part when the constant of the constant table of the task processing is changed, and issues a stop instruction at the end of transmission of the changed constant of the constant table. Command output means for instructing the transmitted task processing execution command, and means for transmitting a task processing execution / stop command of the extension unit and a constant of the changed constant table;
The extension unit receives a task processing execution / stop instruction from the common unit, a task processing execution / stop instruction based on the task processing execution / stop instruction, and a constant from the common unit. Means for receiving and storing it in a common part constant table, and selectively executing / stopping the task processing according to a task processing execution / stop command from the common part. 3. The information processing system according to claim 2, wherein the extension unit receives an execution / stop command from the common unit instead of including a determination unit that determines execution / stop of the task processing based on the execution / stop command from the common unit. A registration change processing means for managing the registration file, a means for deleting / reregistering the registration data of execution / stop of the task processing by the registration change processing means, and An information processing system comprising: an execution order management unit that controls execution and stop.・

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