JP4500484B2 - Controller and information communication service method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a programmable controller that monitors and controls production line devices and robots for industrial applications, a programmable controller that monitors and controls various devices such as air conditioners, security devices, lighting devices, and elevators in buildings and homes, electric power, The present invention relates to a programmable controller that monitors and controls equipment that supports infrastructure such as gas and water, and more particularly, to a controller that communicates with an information communication network represented by the Internet and communicates using Web or XML.
[0002]
[Prior art]
As a prior art of a controller equipped with a Web server corresponding to an information communication network, for example, there is a programmable controller described in JP-A-11-24716.
[0003]
FIG. 27 is a block diagram showing a basic configuration of a programmable controller equipped with a conventional Web server function. The programmable controller (main body) 1 controls sequence control means 11 for executing a sequence program of the programmable controller, input / output processing 12 for inputting / outputting data to / from an input / output module (not shown), and the execution state of the programmable controller. HTML text that stores text representing the monitor control function provided in the programmable controller 1 in a menu format, the communication processing 14 for processing communication with the execution state control monitor 13 to be monitored, the conventional programming tool, and the Web server 15 And storage means 16.
[0004]
The programmable controller 1 and the computer 3 are connected by a network 2 such as Ethernet (registered trademark). The computer 3 may be a personal computer or a workstation 3 as long as it is equipped with a Web browser.
[0005]
When the computer 3 executes a general-purpose Web browser and designates the HTML text of the programmable controller 1, the Web server 15 of the programmable controller 1 executes a read request by HTTP and stores the HTML text stored in the HTML text storage unit 16. Is returned to the computer 3.
[0006]
More specifically, the HTML text is read into a general-purpose web browser, and the monitoring control function supported by the programmable controller 1 is displayed as a web service in a menu format.
[0007]
If a Web service item displayed in hypertext on a menu is selected and a CGI (Common Gateway Interface) linked to the hypertext is called, the Web server 15 performs communication processing 14 for communicating with a conventional programming tool. call.
[0008]
The communication process 14 sends a request to the execution state control monitor 13 with a command dedicated to the programmable controller similar to the conventional one. The communication process 14 returns a response from the execution state control monitor 13 to the Web server 15 in the HTML text format.
[0009]
The Web server 15 returns the response to the computer 3 in the HTML text format and displays it on the general-purpose HTML browser being executed.
[0010]
As this type of prior art, there are controllers described in Japanese Patent Application Laid-Open No. 2000-100810, Japanese Patent Application Laid-Open No. 11-161322, Japanese Patent Application Laid-Open No. 11-249717, and USP 6,061,603.
[0011]
[Problems to be solved by the invention]
In the conventional programmable controller 1, the information communication service represented by the Web server 15 Questions The main objective is to improve the exchange of information between people and devices, and it does not have a function to guarantee real-time processing of important services in communication control between devices. .
[0012]
For example, it is assumed that when a person operates a Web browser of the personal computer 3 to monitor information on the programmable controller 1, a certain control device urgently requests control data of the programmable controller 1.
[0013]
If the communication from the personal computer 3 to the programmable controller 1 is executed even a little earlier than the communication from the control device to the programmable controller 1, the Web server of the programmable controller 1 receives the communication from the outside first. Since the processing is performed in order, the communication that is urgently requested from the control device is not processed unless the communication processing from the personal computer 3 is completed.
[0014]
As described above, in the communication from the control device, the response speed may be deteriorated by other communication even though real time processing such as a comma number of seconds is required.
[0015]
On the other hand, since the process of communication from the personal computer is because the person is monitoring the Web browser, the response speed is not so required, for example, the response from the programmable controller 1 is returned after 2 to 3 seconds. But it doesn't matter.
[0018]
The present invention Eyes The objective is to provide a programmable controller provided with means for enhancing the real-time processing function of an information communication service represented by a Web server and expanding the application range to communication control between devices.
[0020]
[Means for Solving the Problems]
The present invention Note In order to achieve this, service execution priority control means is provided for giving priority information to communication contents and controlling the execution order of corresponding information communication services based on this priority information.
[0021]
That is, the controller of the present invention includes, as programs executed by the CPU, a real-time OS, a group of application tasks managed and executed by the real-time OS, Means for receiving transmitted communication contents by executing a communication IF of a Web server that communicates using the http protocol, and interpreting the received communication contents by executing an XML parser And a task execution control task that is activated by a periodic timer or an event interrupt and controls the execution of the task, and executes a service for monitoring and controlling devices via the network. And the communication content sent to the controller via the network is , A plurality of activation service IDs, and a service priority indicating the priority of services activated by the plurality of activation service IDs It is information including. In this case, the information communication service task service Refer to the task priority conversion table created by associating the priority with the task priority in the controller and stored in the memory. service Converts the priority to the task priority in the controller and activates the communication contents sent to the controller service Multiple activation of communication contents by referring to the task conversion table created by associating the ID with the task ID in the controller and stored in the memory service Service execution priority control for converting each ID into a task ID in the controller is provided. Then, the CPU executes a task corresponding to a plurality of task IDs in the controller converted by the service execution priority control based on the converted task priority in the controller.
[0022]
In addition, the communication content sent to the controller via the network is Furthermore, it includes identification information of a plurality of controllers that are to execute the task, and the activation service ID is recorded in association with each of the identification information of the plurality of controllers, specifies the service to be activated in each controller, and in each controller , Service execution priority control service Priority Self As well as converting to task priority in the controller , Double Number of controllers Identification Of the controller's own controller identification Support information Is recorded Start-up service ID Self Convert to task ID in the controller. Then, the CPU is converted by the service execution priority control. Self Tasks corresponding to a plurality of task IDs in the controller are executed based on the converted task priority in the controller. Also, depending on the communication content, multiple controllers Identification Of the controller's own controller identification Information and this controller identification Support information It was recorded with Start-up service Delete the ID and send it to another controller.
[0036]
The information communication service method of the present invention includes, as a program executed by the CPU, a real-time OS that controls the execution order of tasks based on priority, and a plurality of tasks managed and executed by the real-time OS, Information that is received by executing the communication IF of the Web server that communicates with the HTTP protocol and interpreting the received communication content by executing the XML parser Communication service task Have At the same time, a service for monitoring and controlling devices via a network is executed. Communication contents on the network A plurality of activation service IDs, and a service priority indicating the priority of services activated by the plurality of activation service IDs; It is information including. In this case, the service execution priority control executed by the CPU service Refer to the task priority conversion table created by associating the priority with the task priority in the controller and stored in the memory. service Convert priority to task priority in the controller and start communication service Multiple activation of communication contents by referring to the task conversion table created by associating the ID with the task ID in the controller and stored in the memory service Each ID is converted into a task ID in the controller. Then, the CPU executes a task corresponding to a plurality of task IDs in the controller converted by the service execution priority control based on the converted task priority in the controller.
[0046]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a programmable controller according to the present invention and a programmable information communication service to which the controller is applied will be described with reference to FIGS.
<< Embodiment of Controller 1 >>
FIG. 1 is a block diagram showing a basic configuration of a controller according to the present invention for realizing an information communication service excellent in real-time processing.
[0047]
The controller 100 includes a memory 81, an I / O interface 83, a CPU 84, and a network control circuit 85. The memory 81, the I / O interface 83, the CPU 84, and the network control circuit 85 are connected to a bus 82. Yes.
[0048]
The I / O interface 83 connects the device 31 to the programmable controller 100.
[0049]
The CPU 84 includes a timer 841 and an interrupt control circuit INT842.
[0050]
The network control circuit 85 connects the network 2 to the programmable controller 100.
[0051]
A personal computer 3 incorporating a web browser 90 and a device 32 are connected to the network 2. The personal computer 3 may be a PDA or a mobile phone.
[0052]
The memory 81 stores a program executed by the CPU 84. The program includes an operating system OS that is basic software and tasks that are managed and executed by the OS. That is, the program executed by the CPU 84 includes an application task group 91, an information communication service task 92 as information communication service means, a task execution control task 93 as task execution control means, and a real-time OS 94.
[0053]
The application task group 91 includes, for example, four tasks 9101, 9102, 9103, and 9104.
[0054]
Information communication service task 92 executes service priority It consists of a control 921 and an information communication service 922. The information communication service 922 is a Web server, an XML parser, or the like.
[0055]
In particular, when the information communication service 922 is a Web server, the information communication service 922 and the service execution priority The interface with the control 921 is generally CGI.
[0056]
The real-time OS 94 includes an I / O driver 941, a task scheduler 942, and a network driver 943.
[0057]
FIG. 1 shows both the communication content 21 sent from the personal computer 3 to the programmable controller 100 and the communication content 22 sent from the device 32 to the programmable controller 100.
[0058]
The communication content 21 has information such as a priority 211, an activation service ID 212, and data 213 therein, and the communication content 22 includes information such as a priority 221, an activation service ID 222, and data 223 therein.
[0059]
Next, the basic operation of the programmable controller 100 will be described. Based on the task scheduler 942 in the real-time OS 94, the CPU 84 executes tasks in order from the task with the highest priority among the tasks in the executable state registered in the internal task execution queue.
[0060]
If the task to be executed is a task for executing network communication, such as the information communication service task 92, the task reads the communication content received from the network 2 by the network control circuit 85 via the network driver 943. The corresponding communication process is executed. The network communication task passes the communication content to be transmitted obtained in the communication process to the network control circuit 85 to be transmitted to the network 2.
[0061]
On the other hand, if the task to be executed is a task for controlling the device 31, the control task inputs data from the device 31 via the I / O driver 941 and the I / O interface 83 and performs a corresponding control process. Execute. The control task outputs the result obtained by the control processing to the device 31 via the I / O driver 941 and the I / O interface 83, and monitors and controls the device 31.
[0062]
The service execution priority control 921 refers to the priority information and the activation service information in the communication contents 21 and 22 received from the network, finds a task for executing the activation service, and executes the task in order to execute the task. The task 93 is notified.
[0063]
Details of the service execution priority control 921 and the task execution control task 93 will be described later.
[0064]
The task execution control task 93 is activated by a periodic timer or an event interrupt. The task execution control task 93 sets the task to be activated in response to the interrupt factor that activated the task execution control task 93 out of the tasks notified in advance by the service execution priority control 921 to the executable state. The task is registered in a task execution queue managed by the task scheduler 94.
[0065]
The task execution control task 93 may be implemented as an interrupt processing routine instead of a task.
<< Service execution priority control 921 and
Embodiment 1 of Task Execution Control Task 93 >>
A first embodiment of the service execution priority control 921 and the task execution control task 93 will be described with reference to FIGS.
[0066]
FIG. 2 is a diagram illustrating an example of communication contents sent from the personal computer 3 or the device 32 to the programmable controller 100. The communication content 201 includes a service priority 2011, an activation service ID 2012, and data 2013 passed to the activation service. The service priority value and the activation service ID are uniquely defined in the entire system.
[0067]
FIG. 3 is a block diagram showing the basic configuration of the service execution priority control 921 and the transition of communication contents. The service execution priority control 921 includes service priority → task priority conversion 9211, activation service ID → task ID conversion 9212, information conversion 9213, service priority-task priority correspondence table 9214, and activation service-task correspondence table 9215. Become.
[0068]
The service priority to task priority correspondence table 9214 is a conversion table for replacing the service priority with the task priority in each controller. If an appropriate conversion table is created for each controller using this conversion table, the task priority weights can be unified throughout the entire system even if the handling of the task priority differs for each controller.
[0069]
On the other hand, the activation service to task correspondence table 9215 is a conversion table for replacing the activation service ID with a task ID for executing the corresponding activation service in each controller.
[0070]
Communication contents 200, 2001, 2002, and 2003 indicate communication contents including an intermediate progress while the communication contents pass from the information communication service 922 to the task execution control task 93.
[0071]
An operation of the service execution priority control 921 when the service priority of the communication content 200 extracted from the information communication service 922 is 2 and the service ID is 1 will be described.
[0072]
The service execution priority control 921 refers to the service priority to task priority correspondence table 9214 in the service priority → task priority conversion 9211 in the service execution priority control 921, and the task priority corresponding to service priority = 2. 9 is found, and the service priority 2 of the communication content 200 is replaced with the task priority 9 (2001).
[0073]
The service execution priority control 921 refers to the activation service to task correspondence table 9215 in the activation service ID → task ID conversion 9212 and finds 3 as the service ID in the updated communication content 2001 = task ID corresponding to the service 1. The service ID of the communication content is replaced with a task ID (2002).
[0074]
If the communication content sent from the network is character string information such as XML or HTML, finally, in the information conversion 9213, the communication content 2002, which is character string information, is converted into the communication content 2003 of byte code. And passed to the task execution control task 93.
[0075]
If the communication content sent from the network is a byte code from the beginning, the information conversion 9213 is not necessary.
[0076]
FIG. 4 is a block diagram showing a cooperative operation between the service execution priority control 921 and the task execution control task 93. The activation service registration queue 931 includes each service activation method that is a member of the service activation method 930.
[0077]
The service activation method 930 in FIG. 4 includes the following 13 types of service activation methods:
10ms Once: Starts only once with a 10ms period timer
20ms once: Starts only once by 20ms period timer
40ms Once: Starts only once by 40ms period timer
10ms every time: It starts every time by 10ms period timer
20ms every time: Starts every time by 20ms periodic timer
40ms every time: Start every time by 40ms period timer
Event 1 Once: Starts only once when Event 1 occurs
Event 2 Once: Starts only once when Event 2 occurs
Event 3 Once: Starts only once when Event 3 occurs
Event 1 every time: Every time event 1 occurs
Event 2 every time: Every time event 2 occurs
Event 3 every time: Every time event 3 occurs
Immediate start Once: As soon as the service execution priority control registers the communication content, the task execution control task is started immediately and the task corresponding to the registered communication content is started.
Consists of.
[0078]
In the activation service registration queue 931, the communication content 200D1 of <priority 4, task A> is registered in the “10 ms every time” queue, and <priority 5, task B> in the “event 2 once” queue. Communication contents 200C1 are registered, and communication contents 200A1 of <priority 9, task 3> are registered in the "immediate activation once" queue.
[0079]
In FIG. 4, it is assumed that the communication content 200X1 updated in the service execution priority control 921 is registered in the “immediate activation once” queue.
[0080]
The task execution control task 93 is activated by various interrupts. In the example of FIG. 4, the task execution control task 93 includes various interrupts such as a 10 ms timer interrupt 8411, a 20 ms timer interrupt 8411, a 40 ms timer interrupt 8411, an event 1 interrupt 8421, an event 2 interrupt 8422, an event 3 interrupt 8423, and an immediate activation interrupt 843. It is started by.
[0081]
When the service execution priority control 921 registers the communication content 200X1 in the “immediate activation once” queue in the activation service registration queue 931, it immediately causes the immediate activation interrupt 843 to generate an interrupt event.
[0082]
FIG. 5 is a flowchart showing the operation of the task execution control task 93. When the task execution control task 93 is activated by various interrupts, it checks the cause of the interrupt. The task execution control task 93 corresponds to the communication contents for all the communication contents registered in the queue in the service activation method 930 in the activation service registration queue 931 according to the service activation method corresponding to the cause of the interruption. The started task is started (701).
[0083]
The relationship between the interrupt cause and the corresponding service activation method is as follows:
10ms timer interrupt
→ 10ms once, 10ms every time
20ms timer interrupt
→ 20ms once, 20ms every time
40ms timer interrupt
→ 40ms once, 40ms every time
Event 1 interrupt
→ Event 1 once, event 1 every time
Event 2 interrupt
→ Event 2 once, event 2 every time
Event 3 interrupt
→ Event 3 once, event 3 every time
Immediate start interrupt
→ Immediate start Once
It becomes.
[0084]
Specifically, the task activation means that the task scheduler 942 in the real-time OS 94 updates the priority of the task to be activated to the priority value registered in the communication content and makes the task executable. It is to be.
[0085]
At that time, it is checked whether or not the communication content to be executed is registered in “*** once”, ie, the service activation method that is activated only once (702), and is registered in the service activation method that is activated only once. If so, the communication content is deleted from the queue (703).
[0086]
If the service activation method that is activated only once is not registered in 702, the communication content remains registered in the queue.
[0087]
In the case of FIG. 4, the communication content 200X1 updated in the service execution priority control 921 is registered in the “immediate activation once” queue, but the communication content 200X1 is not “immediate activation once”. It may be registered in a queue.
[0088]
FIG. 6 is a block diagram illustrating another example of the cooperative operation between the service execution priority control 921 and the task execution control task 93. Here, the communication content 200X1 is registered in a queue of “10 ms once”.
[0089]
In this case, every time a 10 ms timer interrupt occurs, the task registered in the communication contents registered in the “10 ms once” queue by the service execution priority control 921 is activated.
[0090]
In this case, the service execution priority control 921 does not need to generate an interrupt event in the immediate start interrupt 843 after registering the communication contents.
<< Service execution priority control 921 and
Embodiment 2 of Task Execution Control Task 93 >>
A second embodiment of the service execution priority control 921 and the task execution control task 93 will be described with reference to FIGS.
[0091]
FIG. 7 is a diagram showing another example of communication contents sent from the personal computer 3 or the device 32 to the programmable controller 100. The communication content 201 includes a service priority 2011, a dynamic service ID 2012, and data 2013 to be transferred to the activation service. The service priority 2011 of the second embodiment includes a service priority 20111 and a service activation method 20112. The service priority value and the activation service ID are uniquely defined in the entire system as in the case of FIG.
[0092]
FIG. 8 is a diagram showing communication contents at the time of input and at the time of output in the service execution priority control 921. In FIG. 8, the service execution priority control 921 is the same as in FIG.
[0093]
Communication contents 201 and 2013 indicate communication contents at the time of input and output to the service execution priority control 921 when the communication contents are transferred from the information communication service 922 to the task execution control task 93. In the communication contents 201 and 2013, the service activation method information (in this case, “40 ms once”) is increased as compared with 200 and 2003 in FIG.
[0094]
FIG. 9 is a block diagram illustrating a cooperative operation between the service execution priority control 921 and the task execution control task 93 according to the second embodiment. This configuration is the same as that shown in FIG. 3 except for the communication contents registered in the activation service registration queue 931.
[0095]
The difference from FIG. 3 is that the communication content 200X1 updated in the service execution priority control 921 is registered in a queue corresponding to the “service activation method” of the communication content.
[0096]
For example, in the activation service registration queue 931 in FIG.
“40 ms once” queue: <priority 9, 40 ms once, task 3> communication content 200A1, <priority 23, 40 ms once, task 1> communication content 200B1
"Event 1 every time" queue: <priority 17, event 1 every time, task 4> communication content 200C1,
"Immediate activation once" queue: <priority 4, immediate activation once, task 2> communication content 200D1
The contents of communication are registered.
[0097]
The operation of the task execution control task 93 is the same as that in the above embodiment.
[0098]
In addition to the method described so far, as a service activation method for communication contents, if a new “activation stop” is provided, the service execution priority control 921 has already registered it in the activation service queue 931. Communication contents having the same task ID can be deleted.
[0099]
By referring to the service activation information by this method, the task of communication contents activated every time when a periodic timer or event occurs is excluded from the queue or before the task of communication contents registered in the queue is activated. The task can be removed from the queue and execution of the task can be stopped.
[0100]
According to the above embodiment, the service execution priority control that operates based on the communication content having priority information controls the execution order of the corresponding information communication service. Among these, it is possible to discriminate between communication services to be preferentially processed and communication services that can be postponed, and it is possible to reliably perform real-time processing of communication services to be preferentially processed.
≪Continuous start of multiple services≫
With reference to FIGS. 10 to 13, an embodiment in the case of receiving communication contents including a plurality of services will be described.
[0101]
FIG. 10 is a diagram illustrating communication contents when a plurality of services are continuously activated. In the embodiment of FIG. 10, a controller 1 (101) that monitors and controls the device 1 (301) and a controller 2 (102) that monitors and controls the device 2 (302) are connected by a network 2.
[0102]
In FIG. 10, the controller 1 (101) sends information on the communication content 25 to the controller 2 (102). The communication content 25 includes two activation services executed by the controller 2 (102). The communication content 25 includes priority 251, start service 1 (2521), start service 1 data 1 (2531), start service 2 (2522), and start service 2 data 2 (2532). Become.
[0103]
FIG. 11 is a diagram illustrating an example of registration of communication contents in the activation service registration queue. FIG. 12 is a diagram illustrating an example of registration of communication contents in the activation service registration queue. That is, these drawings are diagrams showing the activation service registration queue 931 in the controller 2 (102).
[0104]
FIG. 11 shows a state in which communication contents are first registered in the “immediate activation once” queue in the service activation method 930 by the service execution priority control 921. Since the communication content 2503 registered in the queue has not yet executed the activation service, task 3 and task 1 corresponding to the activation service 1 (2521) and the activation service 2 (2522) are included in the communication content 2503. It is registered.
[0105]
On the other hand, FIG. 12 shows a situation after the task execution start task 93 executes one task registered in the communication content 2503 from the head in the state of FIG. Since the task 3 corresponding to the first activation service 1 (2521) is activated, the data for the task 3 and the task 3 are deleted from the communication content 25031 registered in the “immediate activation once” queue, Only task 1 corresponding to activation service 2 (2522) to be activated next is registered in communication content 2503.
[0106]
FIG. 13 is a flowchart showing the operation of the task execution control task 93 when a plurality of services are continuously activated. When the task execution control task 93 is activated by various interrupts, it checks the cause of the interrupt. In the service activation method 930 in the activation service registration queue 931, the task execution control task 93 sets the tasks registered in the communication contents for all communication contents registered in the queue corresponding to the cause of the interruption. One is started from the top (701).
[0107]
It is checked whether or not the communication content to be executed is “*** Once”, that is, registered in the service activation method that is activated only once (702). If registered in the service activation method that is activated only once. For example, the task activated this time is deleted from the communication content (7021).
[0108]
At that time, it is confirmed whether or not there is an unexecuted task in the communication content (7022). If there is no task, the communication content is deleted from the queue (703).
[0109]
If the service activation method that is activated only once is not registered in 702, and if an unexecuted task exists in 7022, the communication content remains registered in the queue.
[0110]
In the above processing procedure of the task execution start task 93, when communication contents having a plurality of services are executed, each service in the communication contents is a service start that is started only once.
[0111]
If the service priority of the communication content is set high, these multiple services are executed preferentially, so that reliable real-time processing can be guaranteed.
[0112]
Although FIG. 10 shows an example in which there are two activation services in the communication content, the number of activation services in the communication content is not limited.
≪Interlocking control between multiple controllers≫
An embodiment in which a plurality of controllers perform interlock control will be described with reference to FIGS.
[0113]
FIG. 14 is a diagram illustrating communication contents when a plurality of controllers 101 to 103 perform interlock control. In the embodiment of FIG. 14, a controller 1 (101) that monitors and controls the device 1 (301), a controller 2 (102) that monitors and controls the device 2 (302), and a controller that monitors and controls the device 3 (303). 3 (103) is connected by the network 2.
[0114]
In FIG. 14, the communication contents 23 are sent from the controller 1 (101) to the controller 2 (102). The controller 2 (102) executes the service activated according to the communication content 23, and then transmits the communication content 23 'to the controller 3 (103). The controller 3 (103) activates the service according to the communication content 23 '.
[0115]
The communication contents 23 sent from the controller 1 (101) describe a processing procedure for executing a series of processes in cooperation with a plurality of controllers, that is, a controller to be executed and a service to be executed in the controller. Yes.
[0116]
In the communication content 23 of FIG. 14, a series of processing is going to be executed with the priority 231. First, the activation service A (2321) is executed in the controller 2 (2301), and then in the controller 3 (2302). The start service B (2322) is executed. The processing content 23 is a transition from the controller 1 to the controller 2 to the controller 3, and realizes cooperative control between these controllers.
[0117]
Since the activation service is deleted from the communication content when it is executed, the communication content 23 ′ sent from the controller 2 to the controller 3 is a portion corresponding to the service executed by the controller 3 from the original communication content 23. 2301, 2321 and 2331 are deleted.
[0118]
In addition, the data for the activation service B executed by the controller 3 in the communication content 23 ′ may be changed or added in the controller 2. In that case, the information is updated as compared with the data for the activation service B in the communication content 23.
[0119]
FIG. 15 is a diagram illustrating an example of registration of communication contents in the activation service registration queue. FIG. 16 is a diagram illustrating an example of registration of communication contents in the activation service registration queue. 15 and 16 show the activation service registration queue 931 in the controller 2 (102) and the controller 3 (103).
[0120]
In this embodiment, since the service activation method for communication contents is “10 ms once”, the communication contents are “10 ms once” in the service activation method 930 by the service execution priority control 921 in both FIGS. Registered in the queue.
[0121]
FIG. 17 is a flowchart showing the operation of the task execution control task 93 when interlocking control is performed between a plurality of controllers.
[0122]
When the task execution control task 93 is activated by various interruptions, the cause of the interruption is examined, and in the service activation method 930 in the activation service registration queue 931, a queue constituted by a service activation method corresponding to the cause of the interruption. For all the communication contents registered in (1), one task registered in the communication contents is started from the head (701).
[0123]
It is checked whether or not the communication content to be executed is “*** Once”, that is, registered in the service activation method that is activated only once (702). If registered in the service activation method that is activated only once. For example, the task activated this time is deleted from the communication content (7021).
[0124]
At that time, it is checked whether or not there is an unexecuted task to be executed by the own controller in the communication contents (70221), and if there is not, the activation service information executed by the own controller is deleted in the communication contents. Then, the communication contents are deleted from the queue (7031).
[0125]
Further, it is confirmed whether or not the activation service to be executed in the communication process has become empty (704), and if it is not empty, the communication content is sent to the next controller to be executed.
[0126]
On the other hand, if it is not registered in the service activation method that is activated only once in 702, if there is an unexecuted task that should be executed in its own controller in 70221, the communication content remains registered in the queue. .
[0127]
If the activation service to be executed in the communication content becomes empty in 704, it means that all the services to be executed in the communication content have been executed and the communication content has been completed.
[0128]
In the above processing procedure of the task execution start task 93, when the communication content for executing the interlock control between a plurality of controllers is executed, each service in the communication content is a service start that is started only once.
[0129]
If the service priority of communication contents is set high, these multiple services are executed preferentially, so that reliable real-time processing of interlocking control among multiple controllers can be guaranteed.
[0130]
Although FIG. 14 shows an example of interlock control between three controllers, there is no limit to the number of controllers that perform interlock control.
[0131]
For simplicity, the number of activation services in each controller is one, but the number of activation services is not limited.
[0132]
Furthermore, in the present invention, the case of reception is mainly described. However, when a communication content is newly transmitted, the communication content is basically defined in the communication service to be transmitted.
[0133]
In addition, when receiving and returning a communication content, the priority information of the communication content of the reply is the same as the priority information of the received communication content unless there is a particular problem.
≪XML description of communication contents≫
FIG. 18 is a diagram illustrating an example of communication contents expressed in XML. The portion surrounded by the communication content tag indicates the content of the communication content.
[0134]
Two types of service priority tags and service activation method tags are included in the priority tags, and indicate the service priority and the service activation method.
[0135]
The activation service tag represents an activation service of a node, and includes an execution node tag indicating an execution node ID and a service tag indicating service contents.
[0136]
The service tag includes a service name tag indicating a service ID and a data tag for storing data necessary for service execution.
[0137]
Data in the data tag is stored as a set with a tag indicating the type of data.
[0138]
In the embodiment of FIG. 18, data “ON” is stored in the switch status tag, and the rotation speed 200 is stored in the RPM tag.
[0139]
The number of data stored in the data tag is arbitrary, and the number of services represented by the service tag in the activation service tag is also arbitrary.
[0140]
Further, the number of activation services of the node represented by the activation service tag in the communication content tag is also arbitrary.
[0141]
Furthermore, the service activation method tag and the execution node tag can be omitted.
[0142]
In the above, an example of communication content by XML has been shown. In the case of a complicated processing procedure for starting a plurality of services, such as continuous activation of the plurality of services or interlocking control between a plurality of controllers, in the communication content, There is also a method for realizing communication contents in an agent program that manages continuous activation of these services and interlocking control between controllers.
≪Programmable information communication service≫
≪Web service by script execution≫
<< Overall Configuration of Programmable Controller 10 >>
FIG. 19 is a block diagram illustrating a basic configuration of a software module of the controller 10 that implements a programmable Web service.
In FIG. 19, the programmable controller 10 includes a programmable controller basic block 110, a Web server 15, an HTML menu 16, a sequence control linkage Web service 17, and profile information storage means 18.
[0143]
The programmable controller basic block 110 controls the execution state of the sequence control means 11 for executing the sequence program of the programmable controller, the input / output processing 12 for inputting / outputting data to / from the input / output module, and the programmable controller basic block 110. And an execution state control monitor 13 for monitoring and a communication process 14 for processing communication between the conventional programming tools.
[0144]
The HTML menu 16 is an HTML text storage unit that stores text representing a Web service to the programmable controller 10 described in HTML in a menu format.
[0145]
The sequence control cooperation Web service 17 sequentially executes corresponding processing according to the instruction sequence described in the script language, starts the communication processing 14, and returns the result to the Web server 15 as HTML text.
[0146]
The profile information storage unit 18 stores system information, Web service information, and the like that are referenced or updated by the programmable controller basic block 110.
[0147]
The communication process 14 includes commands dedicated to the programmable controller, such as a memory write process 141, a memory read process 142, a CPU control process 143, and an I / O control process 144, similar to the conventional one.
[0148]
The sequence control cooperation Web service 17 includes a script group 171 describing a Web service and a Web service execution engine 172 that executes the Web service script.
[0149]
As an example, the Web service script group 171 includes a Web service 1 (1711), a Web service 2 (1712), a Web service 3 (1713), a profile display 1714, and a Web service addition 1715.
[0150]
The Web service execution engine 172 includes a communication processing activation library 1721 including command interpretation 1722 that sequentially interprets and executes each command of the script language described in the Web service script, and processing that activates each processing in the communication processing 14. And a general-purpose processing library 1723 consisting of processing for executing general-purpose instructions such as arithmetic operations and character string operations, and HTML text creation 1724 are included.
[0151]
The communication process activation library 1721 includes a memory write activation process 241, a memory read activation process 242, and a CPU that activate the memory write process 141, the memory read process 142, the CPU control process 143, and the I / O control process 144 in the communication process 14, respectively. A control activation process 243 and an I / O control activation process 244;
[0152]
The profile information storage unit 18 stores system information storage 181, sequence control program information 182, I / O allocation information 183, Web service information 184, and the like.
[0153]
The programmable controller 10 and a personal computer or workstation 3 equipped with a Web browser are connected by a network 2 such as Ethernet (registered trademark).
<< Overall Operation of Programmable Controller 10 >>
FIG. 20 is a flowchart for explaining the operation of the Web service of the programmable controller 10.
[0154]
When a general-purpose Web browser is executed in the personal computer or workstation 3 and the HTML text of the programmable controller 10 is designated (51), a read request in HTTP is executed and stored in the HTML text storage means 16 from the Web server 15. The existing HTML text is returned (52).
[0155]
When the HTML text is read into the general-purpose Web browser, a list of Web services supported by the programmable controller 10 is displayed in a menu format (511).
[0156]
If the Web service item displayed in the hypertext on the menu is selected and the CGI linked to the hypertext is called, the Web server 15 calls the corresponding Web service in the Web service script group 171 (53). The called web service is executed according to the processing procedure in the box 540 in FIG.
[0157]
The instruction interpretation 1722 fetches an instruction from the head of the instruction sequence of the script language constituting the called Web service (54), sequentially interprets the instruction in the instruction string constituting the service, and processes in the corresponding library Is called (55).
[0158]
If the instruction interpreted by the instruction interpretation 1722 is an instruction for controlling or monitoring the execution state of the programmable controller basic block 110, the communication processing 14 communicating with the conventional programming tool is called via the communication control activation library 1721. The communication process 14 sends a request to the execution state control monitor 13 with a command dedicated to the programmable controller similar to the conventional one. The response is returned from the communication process 14 to the command interpretation 1722 via the communication process activation library 1721 (57). At that time, the information in the profile information storage means 18 is referred to or updated as necessary.
[0159]
Instruction interpretation 1722 retrieves the next instruction (510).
[0160]
If the interpreted instruction is a general-purpose instruction such as an arithmetic operation or a character string operation, the instruction interpretation 1722 operates a corresponding process in the general-purpose processing library 1723. The instruction interpretation 1722 receives the processing result (58) and takes out the next instruction (510).
[0161]
If the interpreted instruction is HTML text generation, the instruction interpretation 1722 creates an HTML text based on the processing results of other instructions so far (59) and takes out the next instruction (510).
[0162]
If the interpreted command is a script termination command, the command interpretation 1722 terminates the Web service process and returns the created HTML text to the Web server 15 (56). The Web server 15 returns the HTML text to the personal computer or workstation 3 (52), and displays it on the general-purpose HTML browser being executed (511).
≪Communication processing≫
FIG. 21 is a list of commands dedicated to the programmable controller provided by the communication process 14. Memory write processing includes all clear processing that clears the memory area to zero, addressed program transfer processing, memory allocation information, that is, information writing processing where the user program is allocated in the memory, parameter change end processing, timer counter There is a setting value change process.
[0163]
Memory read processing includes address designation program read processing, user program final circuit search processing, and memory allocation information read processing.
[0164]
CPU control processing includes CPU status read processing, CPU operation / stop designation processing, CPU exclusive occupation / cancellation processing, CPU occupation forced cancellation processing, calendar clock setting, and readout processing.
[0165]
As the I / O control processing, I / O No. Monitor processing by designation (continuous N point setting from designated No.), I / O No. Forced set / reset processing by designation (continuous N point setting from designated No.), I / O No. Monitor processing by designation (random N points can be designated), I / O No. There is forced set / reset processing by specification (random N points can be specified).
[0166]
On the other hand, in the communication processing activation library 1721, processing for starting each communication processing is prepared in a one-to-one correspondence with these communication processing.
[0167]
When the basic communication processing and the general-purpose processing in the general-purpose processing library 1723 are executed in combination in the Web service script in the Web service script group 171, various applied Web services can be realized.
≪Profile information≫
FIG. 22 is a diagram showing an example of profile information stored in the profile information storage unit 18.
[0168]
The system information includes version information of the control software, an execution cycle of the sequence program execution task, an interrupt factor of the interrupt program execution task, and an execution state of the programmable controller.
[0169]
Sequence control program information includes the title of each program to be executed, the execution task to which each program is assigned, memory allocation information, comment information for each variable used in the program, various attributes such as data type, size, etc. Information and variable memory allocation information.
[0170]
The I / O allocation information includes various attribute information such as information on the I / O module mounted on each I / O slot of the programmable controller, comment information on each mounted I / O, data type, and size.
[0171]
Web service information includes the title of each registered Web service, memory allocation information, service activation conditions (activation at call, event activation, cyclic activation), title of each process registered in the library, I / O information ( Attribute information such as arguments, return value data type, size), and memory allocation information.
[0172]
The profile information is referred to or updated by the programmable controller basic block 110.
[0173]
The entire profile information is referred to by the profile display service in the Web service group 171 and returned to the personal computer or workstation 3 as HTML text, and the list of profile information can be referred to or updated by the general-purpose Web browser.
[0174]
The profile information is stored in the memory of the programmable controller in the form of a structure or an array, or is stored in a text format using XML (eXtensible Markup Language) in order to increase the efficiency of cooperation with the Web service. .
≪Web service addition operation≫
As described above, the Web service in the Web service script group 171 can be described in a script language that can use the communication process 14 and the general-purpose process 1723, and is programmable. Further, by using the Web service information in the profile information 18, the Web service can be updated (added and deleted) while the programmable controller is operating.
[0175]
FIG. 23 is a flowchart showing the operation of the Web service addition 1715. That is, FIG. 23 is a diagram showing the contents of the service script executed in the Web service operation box 540 of FIG.
[0176]
First, referring to the title and memory allocation information of each Web service registered in the profile information 18, an empty area sufficient to store a new Web service to be added is secured above the memory (61).
[0177]
Next, a new Web service script is downloaded to the temporary memory area of the programmable controller (62).
[0178]
The download is executed using the memory write process 141 in the communication process 14. A general FTP service may be used in TCP / IP.
[0179]
Furthermore, the use variable (63) and use I / O (64) of the downloaded script are compared with the variable information and I / O information registered in the profile information to confirm whether or not they match, If not, the downloaded script is written in the secured area (65).
[0180]
Finally, the start condition of the Web service is set, the Web service start condition in the profile information is updated (66), and the HTML text of the success display is created (67). On the other hand, when an error occurs in the processing procedures 61, 63, 64, 65, an HTML text indicating the error is created (68).
[0181]
If the profile information 18 is referred to, it is easy to delete a registered Web service. Here, description of the Web service deletion procedure is omitted.
[0182]
Here, the embodiment has been described in the case where the Web service is a script. As the script language, Perl language often used in information-related Web servers can be used. The script language may be a self-made script language or another script language.
[0183]
On the other hand, in FIG. 19, each Web service in the Web service group 171 is realized by a standard code such as JAVA (registered trademark) byte code instead of the script language, and the instruction interpretation 1722 executes the byte code. The configuration may be replaced with a virtual machine.
[0184]
Since the configuration and operation of the programmable controller 10 in this case are almost the same as in the case of the script, description thereof is omitted.
≪Web service by direct execution of microcomputer instruction code≫
In the embodiments described so far, the Web service is realized by a script or byte code, and adopts a configuration in which each instruction of the script language is sequentially interpreted and executed in the instruction interpretation 1722, or the byte code is executed as a virtual machine. It was.
[0185]
The Web service can be executed after being compiled into an instruction code of a microcomputer.
[0186]
FIG. 24 is a block diagram illustrating a configuration of a software module of the programmable controller 10 when the Web service is realized by a microcomputer instruction code.
[0187]
There are two differences between the software module of FIG. 19 and the software module of FIG.
[0188]
First, the Web service script group 171 and the internal Web service in FIG. 19 are configured with microcomputer instruction codes instead of scripts in the software module in FIG. Therefore, in FIG. 24, the block 171 is labeled as a Web service microcomputer instruction code group.
[0189]
Secondly, the software module of FIG. 24 does not have the instruction interpretation 1722 of FIG. Call 1724 directly.
[0190]
The operation of the programmable controller 10 in FIG. 24 will be described. The difference in operation between the software module in FIG. 19 and the software module in FIG. 24 is that the processing described in the Web service execution 540 in FIG. 20 is executed by the instruction interpretation 1722 in FIG. In the case of FIG. 24, the microcomputer itself is executing.
[0191]
Other operations are basically the same in the software module of FIG. 19 and the software module of FIG.
[0192]
In order to compile and create a Web service that operates on the programmable controller 10 of FIG. 24, information such as memory allocation for processing in the library registered in the profile information 18 is extracted in advance.
[0193]
Using the extracted information, information such as a jump destination address to processing in the library is inserted into a microcomputer instruction code string of a Web service generated by compilation. When information is inserted into the microcomputer instruction code sequence in this way, the communication processing activation library 1721, the general-purpose processing library 1723, and the HTML text creation 1724 can be directly called.
≪Web service using sequence control≫
<< Overall Configuration of Programmable Controller 10 >>
In the above embodiment, the web service uses the communication processing 14 having the function of communicating with the conventional programming tool in order to control and monitor the execution state of the programmable controller basic block 110. Another embodiment in which the web service process is executed by the sequence control unit 11 without using the communication process 14 will be described.
[0194]
FIG. 25 is a block diagram illustrating a basic configuration of a software module of a controller that realizes a programmable Web service.
[0195]
In FIG. 25, the programmable controller (main body) 10 includes a sequence controller 11 that executes a sequence program of the programmable controller, an input / output process 12 that inputs and outputs data to and from the input / output module, HTML text storage means 16 for storing text representing a Web service to the programmable controller 10 described in HTML in a menu format.
[0196]
The sequence control unit 11 includes a Web service processing group 112 and a sequence control execution engine 113 in addition to the normal sequence control processing 111. The sequence control execution engine 113 interprets the instruction codes of the sequence control processing 111 and the web service processing group 112 and sequentially executes them.
[0197]
As an example, the Web service processing group 112 includes Web service processing such as Web service 1 (1121), Web service 2 (1122), Web service 3 (1123), profile display 1124, and Web service addition 1125.
[0198]
The HTML text creation 11322 converts the processing result of the Web service into HTML text and returns it to the Web server 15.
[0199]
The sequence control execution engine 113 includes ladder basic instruction execution means 1131 and application instruction execution means 1132. The applied instruction execution means 1132 includes general-purpose instruction execution means 11321 that executes general-purpose instructions such as arithmetic operations and character string operations, and HTML text creation 11322.
[0200]
The sequence control cooperative web service 170 activates a service in the web service processing group 112.
[0201]
The sequence control cooperation web service 170 refers to the web service activation information group 1710 including setting information for activating each service in the web service processing group 112 and the web service activation information in the web service activation information group 1710. , And a web service activation process execution means 1720 that executes a process for activating a web service in the corresponding web service processing group 112.
[0202]
The Web service activation information group 1710 is Web service 1 activation, which is setting information for activating the Web service 1, 1122, Web service 2, 1122, Web service 3, 1123, Profile display of 1124, Web service addition 1125 Information 1701, Web service 2 activation information 1702, Web service 3 activation information 1703, and profile display activation information 1704 correspond to Web service additional activation information 1705.
[0203]
The profile information 18 is profile information storage means of the programmable controller 10 that stores system information, Web service information, and the like, and is referred to or updated by the application instruction execution means 1132.
[0204]
The profile information storage unit 18 stores system information storage 181, sequence control program information 182, I / O allocation information 183, Web service information 184, and the like.
[0205]
The programmable controller 10 and a personal computer or workstation equipped with a Web browser are connected by a network 2 such as Ethernet (registered trademark), for example.
<< Overall Operation of Programmable Controller 10 >>
FIG. 26 is a flowchart showing the operation of the Web service of the programmable controller 10.
[0206]
When a general-purpose Web browser is executed in the personal computer or workstation 3 and the HTML text of the programmable controller 10 is designated (51), a read request in HTTP is executed and stored in the HTML text storage means 16 from the Web server 15. The existing HTML text is returned (52).
[0207]
When the HTML text is read into the general-purpose Web browser, a list of Web services supported by the programmable controller 10 is displayed in a menu format (511).
[0208]
When a Web service item displayed in hypertext on the menu is selected and CGI linked to the hypertext is called, the Web server 15 causes the Web service activation processing execution unit 1720 to execute the Web service activation information group 1710. The Web service in the corresponding Web service processing group 112 is started with reference to the corresponding Web service start information (54).
[0209]
The sequence control execution engine 1132 executes the activated web service, and returns the HTML text created during the web service execution to the web server 15 (541).
[0210]
The Web server 15 returns the HTML text to the personal computer or workstation 3 (52) and displays it on the general-purpose HTML browser being executed (511).
[0211]
In the present embodiment, since the web service processing group 112 is realized by the programmable sequence control means 11, the web service processing group 112 becomes programmable.
[0212]
In the above embodiment, the CGI (Common Gateway Interface) is used for the Web server 15 to call the corresponding Web service. However, SSI (Server Side Include) may be used instead of the CGI.
[0213]
In SSI, when an HTML text read request is issued from the personal computer or the Web browser of the workstation 3, the Web server 15 finds and executes the SSI processing included in the HTML text to be returned, and the processing. Replace the result with HTML text and send it back.
[0214]
Even with SSI, a service similar to CGI can be realized.
[0215]
Here, detailed description of the embodiment using SSI is omitted.
[0216]
【The invention's effect】
According to the present invention, the communication content having the priority information and the service execution priority control means operating based on the priority information control the execution order of the corresponding information communication service, so that the communication content is activated by the communication content. Among communication services, a communication service to be preferentially processed and a communication service to be postponed can be discriminated, and a communication service to be preferentially processed can be reliably processed in real time.
[0217]
In addition to the effect of ensuring real-time processing of communication services to be preferentially processed in a programmable controller equipped with a Web server, providing a sequence control cooperation Web service between the Web server in the programmable controller and communication processing, An effect of providing a programmable web service can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a basic configuration of a controller according to the present invention for realizing an information communication service excellent in real-time processing.
FIG. 2 is a diagram showing an example of communication contents sent from the personal computer 3 or the device 32 to the programmable controller 100. FIG.
FIG. 3 is a block diagram showing the basic configuration of service execution priority control 921 and the transition of communication contents.
4 is a block diagram showing a cooperative operation between a service execution priority control 921 and a task execution control task 93. FIG.
5 is a flowchart showing the operation of a task execution control task 93. FIG.
FIG. 6 is a block diagram illustrating another example of a cooperative operation between a service execution priority control 921 and a task execution control task 93.
7 is a diagram showing another example of communication contents sent from the personal computer 3 or the device 32 to the programmable controller 100. FIG.
FIG. 8 is a diagram showing communication contents at the time of input and at the time of output in the service execution priority control 921.
9 is a block diagram showing a cooperative operation between a service execution priority control 921 and a task execution control task 93. FIG.
FIG. 10 is a diagram illustrating communication contents when a plurality of services are continuously activated.
FIG. 11 is a diagram showing an example of registration of communication contents in an activation service registration queue.
FIG. 12 is a diagram illustrating an example of registration of communication contents in an activation service registration queue.
FIG. 13 is a flowchart showing the operation of a task execution control task 93 when a plurality of services are continuously activated.
FIG. 14 is a diagram showing communication contents when interlocking control is performed between a plurality of controllers 101 to 103;
FIG. 15 is a diagram illustrating an example of registration of communication contents in an activation service registration queue.
FIG. 16 is a diagram illustrating an example of registration of communication contents in an activation service registration queue.
FIG. 17 is a flowchart showing the operation of a task execution control task 93 that performs interlock control between a plurality of controllers.
FIG. 18 is a diagram illustrating an example of communication contents expressed in XML.
FIG. 19 is a block diagram illustrating a basic configuration of a software module of a controller that realizes a programmable Web service.
FIG. 20 is a flowchart for explaining the operation of the Web service of the programmable controller 10;
FIG. 21 is a list of commands dedicated to the programmable controller provided by the communication process 14;
22 is a diagram showing an example of profile information stored in profile information storage means 18. FIG.
FIG. 23 is a flowchart showing the operation of Web service addition 1715;
FIG. 24 is a block diagram showing a configuration of a software module of the programmable controller 10 when a Web service is realized by a microcomputer instruction code.
FIG. 25 is a block diagram illustrating a basic configuration of a software module of a controller that realizes a programmable Web service.
FIG. 26 is a flowchart showing the operation of the Web service of the programmable controller 10;
FIG. 27 is a block diagram showing a basic configuration of a programmable controller equipped with a conventional Web server function.
[Explanation of symbols]
1,10,100 controller
11 Sequence control means
110 Programmable controller basic block
111 Sequence control processing
112 Web service processing group
1121, 1122, 1123, 1124, 1125 Web services
113 Sequence control execution engine
1131 Ladder basic instruction means
1132 Application instruction means
11321 General purpose command means
11322 Create HTML text
12 Data input / output means
13 Execution state control monitor
14 Communication processing means
141 Memory write processing
142 Memory read processing
143 CPU control processing
144 I / O control processing
15 Web server
16 HTML menu
17,170 Sequence control Web service
1701, 1702, 1703, 1704, 1705 Web service activation means
171 Web service script group, Web service microcomputer instruction code group
1710 Web service activation information group
1711, 1712, 1713, 1714, 1715 Web services
172 Web service execution engine
1721 Communication processing startup library
200, 2001, 2002, 2003, 200A1, 200B1, 200C1, 200D1, 200X1, 200Y1, 201, 2013, 21, 22, 23, 23 ', 2303, 23031, 25, 2503, 25031
211, 221, 231, 251 Priority
2011, 20111 Service priority
2012, 212, 222, 2321, 2322, 2521, 2522 Startup service
2013, 213, 223, 2331, 2332, 2332 ', 2531, 2532 data
2301,3022
241 Memory write start
242 Memory read start
243 CPU control start
244 I / O control start
1722 Instruction Interpretation
1723 General-purpose processing library
1724 HTML text creation
18 Profile information
181 System profile information
182 Sequence control program profile information
183 I / O allocation profile information
184 Web service profile information
2 network
3 Personal computer
31, 32, 301, 302, 303
51, 52, 53, 54, 55, 56, 57, 58, 59, 510, 511, 540, 541 Configuring the flow showing the operation of the programmable controller Web service
61, 62, 63, 64, 65, 66, 67, 68 Steps for configuring a flow showing the operation of the Web service addition processing
701, 702, 7021, 7022, 70221, 703, 7031, 704, 705 Steps constituting a flow showing the operation of the task execution control task
81 memory
82 bus
83 I / O interface
84 CPU
841 Timer
8411, 8412, 8413 Timer interrupt
842 INT (interrupt)
8421, 8422, 8423, 843 Event interrupt
85 Network control circuit
90 Web browser
91,911,912 Application task group
9101, 9102, 9103, 9104, 9111, 9112, 9121, 9122 Application task
92 Information Communication Service Task
921 Service execution priority control
9211 Service priority → Task priority conversion
9212 Activation service ID → Task ID conversion
9213 Information conversion
9214 Service Priority to Task Priority Correspondence Table
9215 Startup Service-Task Correspondence Table
922 Information and communication services
93 Task execution control task
930 Service activation method
931 Activation service registration queue
94 Real-time OS
941 I / O driver
942 Task Scheduler
943 Network Driver

Claims (3)

As a program executed by the CPU, a real-time OS, an application task group that is managed and executed by the real-time OS, and a communication content of a Web server that communicates the communication contents transmitted by the http protocol are received, and An information communication service task having means for interpreting the received communication content by executing an XML parser, and a task execution control task that is activated by a periodic timer or event interrupt and controls the execution of the task, In the controller that executes the service to monitor and control
Communication contents to be sent to the controller via the network is information including a start service ID of multiple, and a service priority indicating the priority of the service that is activated by the activation service ID of said plurality of,
The information communication service task is created by associating the service priority of the communication content sent to the controller with the task priority in the controller and stored in a memory, with reference to the task priority conversion table, converts the service priority of the communication content on the task priority in the controller, is stored in the memory is created and the task ID of the starting service ID and the controller of the communication content to be sent to said controller in correspondence Referring to task conversion table are provided with a service execution priority control for converting a plurality of said start service ID to the task ID of each in the controller of the communication content,
Controller the CPU is a task corresponding to a plurality of the task ID in the controller which is converted by the service execution priority control, and executes, based on the task priority of the converted in the controller . The controller of claim 1, wherein
The communication content to be sent to said controller via said network further includes identification information of a plurality of controllers to execute the task, the activation service ID, correspondence to each of said identification information of said plurality of controllers Identify the services that should be activated on each controller,
In each controller, the service execution priority control, the converts the service priority to the task priority of the own controller, the self controller identification information of the previous Kifuku number of controller identification information of the communication content converting said start service ID that is the recording in correspondence to the task ID in its own controller,
Wherein the CPU, the tasks corresponding to the plurality of the task ID in its own controller, which is converted by the service execution priority control, executed on the basis of the task priority of the converted in the controller,
From the communication content, sending and deleting the activation service ID that had been said recorded in association with the identification information and the free-controller identification information of the controller of the identification information of the plurality of controllers to other controllers A featured controller. As a program to be executed by a CPU, a includes a plurality of tasks are managed performed by real-time OS and the real time OS is controlled on the basis of the execution order of tasks in the priority, communicating the communication contents sent by http protocol A controller that executes a communication IF of a Web server and has an information communication service task that interprets the received communication content by executing an XML parser and also executes a service for monitoring and controlling devices via a network In the information communication service method,
Communication contents on the network is information including a start service ID of multiple, and a service priority indicating the priority of the service that is activated by the activation service ID of said plurality of,
The service execution priority control executed by the CPU is created by associating the service priority of the communication content with the task priority in the controller and stored in the memory, with reference to the task priority conversion table. It converts the service priority of the communication content on the task priority in the controller, wherein the activation service ID and association tasks stored in the memory is created convert the task ID in the controller of the communication content Referring to Table, to convert a plurality of said start service ID of the communication content on the task ID of each controller and
Information communication by the CPU, a task corresponding to a plurality of the task ID of the service execution priority controlled by the transformed controller, and executes, based on the task priority of the converted in the controller Service method.

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