JP3518957B2 - Distributed control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] [0001] The present invention relates to a header section and a data section.
Embedded in the transmission frame and transferred to the external device (reception side).
Involved in data transfer to restore the text part on the receiving side.
Especially for data transfer between the management station and multiple normal stations.
The present invention relates to a distributed control device. [0002] 2. Description of the Related Art Conventionally, in a distributed switching system, an
The system processor that controls the entire system is located in the switch room.
It was housed in the main unit set to. This decentralized exchange
In the system, the entire distributed switching system is assigned to each node.
A system that has an exchange process for controlling
No. 7458 (Distributed switching system
Control method). The control method of the above-mentioned distributed switching system is as follows.
Exchange processing that controls the entire distributed switching system in the node
The main unit is not installed in the switchboard room.
Even if the exchange processing function of a certain node stops,
The priority node is the switching system for the entire distributed switching system.
The system has a redundant configuration to execute
This is a method that improves reliability. FIG. 11 shows the above-mentioned Japanese Patent Publication No. 7-08745.
No. 8 describes an outline of a control method of a distributed switching system.
It is a lock figure. In FIG. 11, each node 101, 1
02, 103 and 104 are respectively the node processor 1
11, 121, 131, 141 and a system processor
112, 122, 132, 142, all of which
The processors are connected via a common control bus 105.
You. [0005] The four system processors 112, 12
A system processor of one of 2, 132 and 142
Is performing the exchange process of the distributed switching system, and other
The system processor is in a standby state. Here, the system
If the processor 112 has failed, the second priority
The system processor 122 of the order performs operation display.
Enter the operation state. [0006] However, as described above,
No. 7-087458.
There are the following problems in the switching system control method.
You. A node that is unused during normal operation and used only during abnormal operation
Even if it has a normal control function, it operates
It had no function. For this reason, the circuit scale is large.
Nevertheless, it is possible to take appropriate action in the event of an abnormality.
could not. [0007] Therefore, among a plurality of communication stations, a certain communication station.
Is abnormal while normal low-priority distributed function
Time, or when the load becomes heavy, support distributed processing of other stations.
Switching to a distributed function that changes the program
It would be useful if you could just do it. [0008] However, the above-mentioned Japanese Patent Publication No. 7-08745.
In the control method of the distributed switching system described in Japanese Patent Publication No.
Always and abnormal times only execute the same processing.
Different processes can be executed for normal and abnormal conditions.
Did not. Further, Japanese Patent Publication No. 7-087458 discloses
In the control method of the distributed switching system of
Function to the next priority distributed system
Can only perform appropriate processing.
Did not. Therefore, a decentralized system capable of appropriately coping with abnormalities
Control devices are being considered. FIG. 12 shows the distributed control device.
FIG. 4 is a schematic block diagram of the configuration of FIG.
This section shows the regular processing. This decentralized control device is
And a communication node composed of a plurality of normal stations 2, 3, and 4.
In a bus-type or ring-type LAN with transmission control
is there. In this distributed control device,
The priority of the processing executed in the stations 2, 3, and 4 is the normal station
2 is processing priority 1, normal station 3 is processing priority 2, normal
The station 4 has the processing priority 3. Normal stations 2, 3, 4
Are distributed internally as shown in FIG.
A control register 40 is provided. Normally, the stations 2, 3, and 4
0 distributed control execution flag 41, abnormality flag 42, processing amount
Work flag 43 can be set. The management station 1 has a distributed control register.
The program execution flag 44 can be set in the star 40. First, consider the case where the normal station 2 has failed.
You. The normal station 2 sends the abnormality flag 42 to the distribution control register 4
Set to 0. The management station 1 determines that the normal station 2
Is set in the distributed control register 40,
The priority of the processing currently executed by the normal station 2 over the normal station 2
The transmission frame 61 for stopping the processing of the order 1 is transferred.
Send. The normal station 2 transmits the transmission frame 6 from the management station 1.
1 is received, the normal station 2 is currently executing the processing priority.
The processing of the order 1 is stopped. After that, the management station 1
For the normal station 4 of the processing priority 3 with the lowest priority,
Stop the processing of the processing priority 3 which is performed by the normal station 4
Transfer frame 62 for the transfer. Usually station 4 is a tube
When receiving the transmission frame 62 from the physical station 1, the normal station 4
The processing of the processing priority 3 currently being executed is stopped. [0015] Thereafter, the management station 1
The processing of the processing priority 1 which was normally executed by the station 2 is executed.
The transmission frame 53
To After that, the management station 1 stores the
The program execution flag 44 is set. Normally, the station 4
When the program execution flag 44 is set,
The distributed control execution flag 41 is set in the distributed control register 40.
The abnormality flag 4 set in the distribution control register 40
2, the processing division flag 43 and the program execution flag 44
Clear and execute the processing of the processing priority 1. As described above, the distribution control register 40 stores
Dispersion control execution flag 41, abnormality flag 42, and division of processing
A flag 43 and a program execution flag 44 are provided.
The frame also has a setting flag. And usually the station is different
Always or when the load becomes heavy, transmit frames or frames
The management station 1 is notified by a message. Further, the management station 1 is a distributing machine having a low priority.
Functioning normal station when an error is received by the management station 1 or
A transmission frame or flag indicating that the load has increased
Transfer and install the distributed processing program
System to switch to distributed processing.
It is configured to improve overall reliability. However, there is a problem that can cope with the above-mentioned abnormalities.
Dispersion control devices also have the following problems. Toes
The normal station where an error occurred or the load became large
If the lag cannot be transferred to the management station, for example,
When the power of the normal station is turned off or when an abnormal
If the management station cannot receive the data even if it is transferred to the management station,
For example, if a cable is disconnected or an abnormal flag
Error flag, etc. due to noise, communication signal attenuation, etc.
If it cannot be sent, you can recognize the occurrence of abnormalities, etc.
There was a problem that appropriate processing could not be performed. It is an object of the present invention to provide a method in which an abnormal condition is
Is unable to transfer the abnormal flag etc. to the management station.
Or the error flag is transferred to the management station,
Recognize the occurrence of abnormalities, etc. even when you cannot receive
To realize a distributed control device that can perform appropriate processing.
Is Rukoto. [0021] Means for Solving the Problems (1) To achieve the above object
Therefore, the present invention is configured as follows. That is,
Recognizes that the received data is valid data,
If the data is not valid,
And a plurality of normal stations for distributed control
And centralized control by sending and receiving data to and from normal stations
A distributed control device having a management station
Each of the normal stations determines whether it is centralized control or distributed control.
A decentralized control setting unit for displaying the determined control content,
Whether the function of the normal station is normal or abnormalOr overloaded or not
Judge,Judgment resultError display setting section indicating
Request the sharing of the processing performed by the station to other normal stations
A process sharing request display setting unit for determining whether or not
Among the distributed control processes of the plurality of normal stations,
A priority determination unit that determines the priority of processing,
And a header that indicates at least the destination and whether it is normal or abnormal
OrOr overloaded or notFlag and whether it is normal or abnormal
AlwaysOr overloaded or notThe normal stations indicated are which normal
To the other stations that are currently processing
A flag indicating whether or not to request the sharing of
A flag indicating which normal station is responsible for the normal station and
A transmission frame consisting of a data part having
And a transmission processing unit for transmitting to the station or the management station.
The master station does not respond to the data transfer to each of the above normal stations without response.
If there is, and an error is displayed in the error display setting section of each normal station,Ah
Rui or overweightIs set to a different station.
AlwaysOr overweightThe abnormality determination unit that determines
Header part indicating at least the contact and whether it is normal or abnormal,Ah
Or too heavyFlag and whether it is normal or abnormal,
Or overweight or notThe normal station indicated by indicates which normal station
Flag and the processing being performed to other normal stations
A flag indicating whether or not to request
The normal station that is relying on has a flag that indicates which normal station
A transmission frame consisting of a data section
And a transmission processing unit for receiving, The management station is
Normal station judged to be abnormal or overloaded by the judgment unit
The above transmission frame is transmitted to other normal stations when
And then processed by a normal station determined to be abnormal or overloaded.
Normal station with the lowest processing priority
Install for You. The management station is responsible for data transfer to each normal station.
Is not responding, and an error is displayed in the abnormal display setting section of each normal station.
If the normal station is set, the normal station is judged to be abnormal.
The normal station has an abnormality
Error flag etc. cannot be transferred to the management station,
Even if flags are transferred to the management station, the management station cannot receive them
Even when abnormalities can be recognized,
Appropriate processing by the science bureau becomes possible. [0023] The normal station in which no abnormality has occurred performs transmission processing.
In the transmission frame transmitted by the
Which normal station has failed.
And it is possible to execute appropriate processing for it.
You. [0025] The normal station in which no abnormality has occurred performs transmission processing.
In the transmission frame transmitted by the
Which normal station failed.
And normal stations that do not request processing division of work
The information indicated in the transmission frame transmitted by the processing unit
Recognizes which normal station requests processing sharing
And take appropriate action for it.
Becomes possible. [0027] The management station is responsible for data transfer to each normal station.
Is not responding, and if there is an error in the
If the weight is set, the normal station is determined to be overloaded.
The station is equipped with a
When the overload flag cannot be transferred to the management station,
Even if flags are transferred to the management station, the management station cannot receive them
Even at times, it is possible to recognize the occurrence of
Appropriate processing by the science bureau becomes possible. [0029] The normal station in which no overload occurs does the transmission processing.
In the transmission frame transmitted by the
Can recognize which normal station was overloaded.
And it is possible to execute appropriate processing for it.
You. [0031] The normal station in which no overload has occurred is transmitted.
In the transmission frame transmitted by the
Can recognize which normal station was overloaded.
And normal stations that do not request processing division of work
The information indicated in the transmission frame transmitted by the processing unit
Recognizes which normal station requests processing sharing
And take appropriate action for it.
Becomes possible. [0033] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.
Will be explained. FIG. 1 shows a first embodiment of the present invention.
FIG. 3 is a schematic configuration diagram of a distributed control device, and illustrates a process performed when a normal station is abnormal.
This is an example where the processing can be properly executed. The distributed control device according to the first embodiment includes a pipe
A communication composed of four nodes, namely, the physical station 1 and the normal stations 2, 3, and 4.
Transmission-controlled bus-type or link-equipped
Network type LAN. As shown in FIG. 2, the management station 1
1, ROM 32, RAM 33, transmission controller 34
And an internal bus 35 for connecting them, and a memory expansion
An external RO that stores a program for distributed processing executed by a station
M36 and external R that stores network variables on communication
The external ROM 36 and the R
And a memory expansion bus 38 for connecting the AM 37.
Have been. The CPU 31 is stored in the ROM 32
Control the transmission controller 34 according to a program
Thus, transmission and reception of various frames with the transmission path 30 are performed.
The RAM 33 stores transmission / reception data and other various data.
Is temporarily used as a buffer memory. Ma
In addition, the external ROM 36 stores the memory executed by the memory expansion normal station.
Stores a program for distributed processing. The external RAM 37 is a communication network.
Stores variables. External ROM 36 and external RAM 37
Is a program for distributed processing to be executed
When the capacity of the network variables on the RAM and communication is small
Has a configuration similar to the configuration normally used in stations 2, 3, and 4.
Is also possible. The CPU 31 of the management station 1 has a functional block.
For data transfer to each of the normal stations 2, 3, and 4,
If these normal stations 2, 3, and 4 do not respond,
An abnormal judgment unit that judges the normal station as abnormal, and the transmission source and transmission
Header part indicating at least the destination and whether it is normal or abnormal
The flag and the normal station indicating whether it is normal or abnormal
A flag indicating whether the station is a normal station, and other normal stations of the processing being executed.
A flag indicating whether or not to request the sharing of
Flag indicating which normal station is requesting sharing
A transmission frame consisting of a data section having
A transmission processing unit for transmitting is provided. Then, the management station 1
Distributed and centralized by sending and receiving data to and from multiple normal stations
Manage and control. Normally, the stations 2, 3, and 4, as shown in FIG.
The CPU 31, the ROM 32, the RAM 33, and the transmission
The controller 34 and the distribution control register 40 are connected to each other.
And an internal bus 35 connected thereto. CPU
31, ROM 32, RAM 33, transmission controller 34
And the internal bus 35 has the same function as that of the management station 1.
One. The respective CPUs 31 of the normal stations 2, 3, and 4
Are centralized control or decentralized control as functional blocks
Decentralized control settings that determine whether the
And whether the function of the normal station is normal or abnormal.
Error display setting section that indicates whether the
It is determined whether or not to request the sharing of the current processing to another normal station.
Process sharing request display setting section to disconnect and display, and its normal station
Priority determination unit that determines the priority of the processing of
And a header that indicates at least the destination and whether it is normal or abnormal
And a flag indicating the normal station itself,
Whether to request sharing of the processing being performed to other normal stations
And a normal station requesting to share the processing
From the data section having a flag indicating which normal station
To transmit the transmission frame to the management station 1 or another normal station.
Communication processing unit. These normal stations 2, 3, and 4 receive the received data.
Recognizes that the data is valid data, and
If not, notify the destination that the data is not valid.
You. The superiority of the processing normally executed in the stations 2, 3, and 4
The priorities are not the same, and the normal station 2 has the processing priority 1,
Normal station 3 has processing priority 2 and normal station 4 has processing priority 3
Is executed. Normal stations 2, 3, 4
Is a distribution control execution flag 41 of the distribution control register 40,
The abnormality flag 42 and the processing division flag 43 can be set. Ma
In addition, the management station 1 stores the program
A row flag 44 can be set. First, the case where the normal station 2 becomes abnormal will be described.
Thus, the normal station 2 sets the abnormality flag 42 to the distribution control register 40
The case when it cannot be set to is described. In other words, if an error occurs
When the power of the normal station 2 is turned off or the cable is disconnected
Line or the abnormal flag is abnormal due to noise, communication signal attenuation, etc.
The normal flag is sent to the management station 1
It is the explanation of In FIG. 1, the management station 1 is a network
The normal station 2, normal station 3, and normal station 4 connected above each
Check whether the normal stations 2, 3, and 4 are normal or abnormal.
The transmission frame 49 is transmitted at regular intervals to
And polling. The management station 1 is different from the normal stations 2, 3, and 4.
This communication is continued until a communication station that is always available is found. This
In the example of the above, since the normal station 2 is abnormal, the management station 1
Polling until normal station 2 confirms no response
Do. The management station 1 confirms that the normal station 2 is not responding.
Upon recognition, the transmission partner station abnormal flag of the transmission frame 49
An abnormal flag of 1 is set to 45. And the other station
In command 46, 2 indicating normal station 2 is set as byte data.
And other normal stations 3 connected to the network,
Broadcast to the normal station 4 in the transmission frame 50
Send. The normal station 3 and the normal station 4 transmit the transmission frame 50
Transmission destination station abnormality flag 45, transmission destination station command 46
Is received, it is recognized that an error has occurred in the normal station 2.
And disconnect the normal station 2 connected to the network.
You. Thereafter, the management station 1 executes the processing with the lowest processing priority.
For the normal station 4 of priority 3, the normal station 4
Frame for stopping the processing of the processing priority 3
Transfer 52. That is, the processing is stopped in the transmission frame 52.
The flag 70 indicating “stop” indicates “3” indicating the stop, and
Priority 3 is set in the flag 71 indicating the priority.
You. The normal station 4 transmits the transmission frame 5 from the management station 1.
2 is received, the normal station 4 is executing the processing priority
Step 3 is stopped. Thereafter, the management station 1 changes to the normal station 4
On the other hand, the processing of the processing priority 1 which was performed by the normal station 2
Is executed by the transmission frame 53.
Install. That is, the transmission frame 53 is
The flag 1 indicating installation is set in the
Priority in the flag 73 indicating the program of the processing to be installed
The program 1 of the first place is set. Then manage
The station 1 stores a program execution flag in the distribution control register 40.
Set 44. Normally, the station 4
After confirming that the gram execution flag 44 has been set,
Execute the distributed control execution flag 41 in the distributed control register 40
Is set to 1 (not executed is 0). And normal station 4
Is the abnormality flag 4 set in the distribution control register 40.
2, the processing division flag 43 and the program execution flag 44
Clear and execute the processing of the processing priority 1. Then, the management station 1 is the normal station that has failed.
When 2 becomes normal, it is connected to other normal stations 3 and 4. This
In the case of, the returned normal station 2 performs the processing of the processing priority 3
May be instructed to be executed, or the
Is changed to priority 3 processing, and normal station 2 is given processing priority.
The process of the first rank may be executed. By the above operation, the processing priority 1
An error occurs in the normal station 2 and the error flag 42 is distributedly controlled.
If it cannot be set in the register 40, the management station 1
In place of the normal station 2 that has occurred, the transmission partner station abnormality flag 4
5. By setting the transmission partner station command 46,
Transfer the processing of processing priority 1 to the normal station with lower processing priority.
Can be executed. Next, a case where the normal station 3 becomes abnormal will be described.
I do. FIG. 4 shows that the normal station 3 is abnormal in the first embodiment.
And the normal station 3 sets the abnormality flag 42
Operation block when it cannot be set in the distributed control register 40
FIG. That is, the power of the normal station 3 in which the abnormality has occurred is
If the cable breaks, the cable breaks,
Error flag due to noise or communication signal attenuation
At the time when transfer is not possible. First, the management station 1 connects to the network.
Normal station 2, normal station 3, and normal station 4
Or a transmission frame 49 for confirming whether the frame is abnormal.
Is transmitted at regular intervals and polling is performed. Abnormal station
Continue this communication until you get it. In this example,
Since station 3 is abnormal, confirm that station 3 is not responding normally.
Polling until The management station 1 must make sure that the normal station 3 does not respond.
Is recognized, the transmission partner station abnormality flag 45 indicates an abnormality flag.
1 is set and the normal station 3 is indicated by the transmission partner station command 46.
Set 3 as byte data and connect to the network
To the normal station 2 and the normal station 3
More broadcast transfer. The normal station 2 and the normal station 4 transmit the transmission frame 50
The transmission destination station abnormality flag 45 and the transmission destination station command
When receiving the password 46, the normal station 3 is notified that an error has occurred.
Recognizes and disconnects the normal station 3 connected to the network.
Let go. Thereafter, the management station 1 has the highest processing priority.
In contrast to the normal station 4 having the lower processing priority 3, the normal station 4
Transmission for stopping the processing of processing priority 3
The frame 52 is transferred. That is, the transmission frame 52
Indicates that the processing stop flag 3 indicates stop and the stop 70
The priority 71 is added to the flag 71 indicating the priority of the processing to be performed.
Is set. Normal station 4 transmits transmission frame 5 from management station 1.
2 is received, the normal station 4 is executing the processing priority
Step 3 is stopped. Thereafter, the management station 1 changes to the normal station 4
On the other hand, the processing of the processing priority 2 performed by the normal station 3
Is executed by the transmission frame 53.
Install. That is, the transmission frame 53 is
The flag 1 indicating installation is set in the
Priority in the flag 73 indicating the program of the processing to be installed
The program 2 of the second place is set. Then manage
The station 1 stores a program execution flag in the distribution control register 40.
Set 44. Normally, the station 4
After confirming that the gram execution flag 44 has been set,
Set distribution control execution flag 41 in distribution control register 40
Then, the abnormal flag 42, the processing specialty flag 43, the program
Clears the system execution flag 44, and executes the processing of the processing priority 2
Execute. Then, the management station 1 is a normal station that has failed.
When 3 becomes normal, it is connected to other normal stations 2 and 4. This
In the case of, the returned normal station 3 performs the processing of the processing priority 3
May be instructed to be executed, or the
Is changed to priority 3 processing, and normal station 3 is given processing priority.
The process of the second priority may be executed. With the above operation, the processing priority 2
An abnormality occurs in the normal station, and the abnormality flag 42 is set to the distributed control level.
Even if it cannot be set to the register 40, the processing priority
It is possible to shift the processing of processing priority 2 at a low normal station.
Wear. Next, although the normal station 2 is abnormal,
The normal station 2 itself can set the abnormality flag 42, and the management station 1
The transmission destination station abnormality flag 45 and the transmission destination
The case where the station command 46 can be set will be described with reference to FIG.
I will tell. The management station 1 is connected to a network.
The normal stations 2, 3, and 4 are assigned to the normal stations 2, 3,
4 to confirm whether or not 4 is normal or abnormal.
The transmission frame 49 is transferred at regular intervals, and polling is performed.
Is going. The management station 1 is different from the normal stations 2, 3, and 4.
This communication is continued until a communication station that is always available is found. This
In the example, the normal station 2 is abnormal and the normal station 2 itself
Has set the abnormality flag 42, the management station 1
It recognizes that the normal station 2 is abnormal. The management station 1 confirms that the normal station 2 is abnormal.
Upon recognition, the transmission partner station abnormal flag of the transmission frame 49
An abnormal flag of 1 is set to 45. And the other station
In command 46, 2 indicating normal station 2 is set as byte data.
And other normal stations 3 connected to the network,
Broadcast to the normal station 4 in the transmission frame 50
Send. The normal station 3 and the normal station 4 transmit the transmission frame 50
Transmission destination station abnormality flag 45, transmission destination station command 46
, The normal station 2 recognizes that an error has occurred.
And disconnect the normal station 2 connected to the network.
You. Thereafter, the management station 1 executes the processing with the lowest processing priority.
For the normal station 4 of priority 3, the normal station 4
Frame for stopping the processing of the processing priority 3
Transfer 52. That is, the transmission frame 52 includes
3 indicating stop is set in the flag 70 indicating stop, and processing for stopping
Priority 3 is set in the flag 71 indicating the priority of
ing. The management station 1 transmits the transmission frame to the normal station 2.
The system 51 is transferred. This transmission frame 51 includes a processing stop.
The flag 70 indicating stop indicates 3 indicating stop, and
Priority 1 is set in the flag 71 indicating the priority.
I have. The normal station 4 sends the transmission frame 5
2 is received, the normal station 4 is executing the processing priority
Step 3 is stopped. Thereafter, the management station 1 changes to the normal station 4
On the other hand, the processing of the processing priority 1 which was performed by the normal station 2
Is executed by the transmission frame 53.
Install. That is, the transmission frame 53 is
A flag 1 indicating installation in the toll flag 72;
The flag 73 indicating the program of the installation process
The first program 1 is set. afterwards,
The management station 1 stores the program execution file in the distributed control register 40.
The lug 44 is set. Normally, the station 4
After confirming that the gram execution flag 44 has been set,
Set distribution control execution flag 41 in distribution control register 40
I do. Then, the normal station 4 is set in the distribution control register 40.
Set abnormal flag 42, processing division of labor flag 43, program
Clears the ram execution flag 44 and sets the processing priority to 1.
Execute Then, the management station 1 is the normal station that has failed.
When 2 becomes normal, it is connected to other normal stations 3 and 4. This
In the case of, the returned normal station 2 performs the processing of the processing priority 3
May be instructed to be executed, or the
Is changed to priority 3 processing, and normal station 2 is given processing priority.
The process of the first rank may be executed. Normal operation of station 2 is abnormal due to the above operation.
The flag 42 can be set, and the management station 1 replaces the normal station 2
The transmission partner station abnormality flag 45 and the transmission partner station command 46
Can be set appropriately. Next, although the normal station 3 is abnormal,
The normal station 3 itself can set the abnormality flag 42, and the management station 1
The transmission partner station abnormality flag 45 and the transmission partner in place of the normal station 3
The case where the station command 46 can be set will be described with reference to FIG.
I will tell. The management station 1 is connected to a network.
The normal stations 2, 3, and 4 are assigned to the normal stations 2, 3,
4 to confirm whether or not 4 is normal or abnormal.
The transmission frame 49 is transferred at regular intervals, and polling is performed.
Is going. The management station 1 is different from the normal stations 2, 3, and 4.
This communication is continued until a communication station that is always available is found. This
In the example, the normal station 3 is abnormal and the normal station 3 itself
Has set the flag 42, the management station 1
The normal station 3 recognizes that it is abnormal. The management station 1 confirms that the normal station 3 is abnormal.
Upon recognition, the transmission partner station abnormal flag of the transmission frame 49
An abnormal flag of 1 is set to 45. And the other station
In command 46, 3 indicating normal station 3 is set as byte data.
And other normal stations 2 connected to the network,
Broadcast to the normal station 3 in the transmission frame 50
Send. The normal station 2 and the normal station 4 transmit the transmission frame 50
Transmission destination station abnormality flag 45, transmission destination station command 46
, The normal station 3 recognizes that an error has occurred.
And disconnect the normal station 3 connected to the network
You. Thereafter, the management station 1 executes the processing with the lowest processing priority.
For the normal station 4 of priority 3, the normal station 4
Frame for stopping the processing of the processing priority 3
Transfer 52. That is, the transmission frame 52 includes
3 indicating stop is set in the flag 70 indicating stop, and processing for stopping
Priority 3 is set in the flag 71 indicating the priority of
ing. Further, the management station 1 transmits the transmission frame to the normal station 3.
The system 51 is transferred. This transmission frame 51 includes a processing stop.
The flag 70 indicating stop indicates 3 indicating stop, and
The priority 2 is set in the flag 71 indicating the priority.
I have. The normal station 4 sends the transmission frame 5
2 is received, the normal station 4 is executing the processing priority
Step 3 is stopped. Thereafter, the management station 1 changes to the normal station 4
On the other hand, the processing of the processing priority 2 performed by the normal station 3
Is executed by the transmission frame 53.
Install. That is, the transmission frame 53 is
The flag 1 indicating installation is set in the
Priority in the flag 73 indicating the program of the processing to be installed
The program 2 of the second place is set. Then manage
The station 1 stores a program execution flag in the distribution control register 40.
Set 44. Normally, the station 4
After confirming that the gram execution flag 44 has been set,
Set distribution control execution flag 41 in distribution control register 40
I do. Then, the normal station 4 is set in the distribution control register 40.
Set abnormal flag 42, processing division of labor flag 43, program
Ram execution flag 44 is cleared, and processing of processing priority 2 is performed.
Execute Then, the management station 1 is a normal station that has failed.
When 3 becomes normal, it is connected to other normal stations 2 and 4. This
In the case of, the returned normal station 3 performs the processing of the processing priority 3
May be instructed to be executed, or the
Is changed to priority 3 processing, and normal station 3 is given processing priority.
The process of the second priority may be executed. With the above operation, the normal station 3 is abnormal.
The flag 42 can be set, and the management station 1 also replaces the normal station 3
The transmission partner station abnormality flag 45 and the transmission partner station command 46
Can be set appropriately. FIG. 7 shows a second embodiment of the present invention.
FIG. 2 is a schematic configuration diagram of a distributed control device, where a load of a certain normal station is
This is an example in which the processing when the size becomes large can be appropriately executed. This
In the second embodiment, the overall configuration and the internal configuration
Are shown in FIGS. 1, 2 and 3 showing the first embodiment described above.
Because the configuration is almost the same,
And the description is omitted. Note that, in the second embodiment,
As in the first embodiment described above, the normal stations 2, 3, and 4 execute
The priority of the processing being executed is not the same,
Is processing priority 1, normal station 3 is processing priority 2, normal station
No. 4 executes the process of the process priority 3. Also, the CPs of the normal stations 2, 3, and 4
U31 determines whether the processing performed by the normal station is excessive.
And an overload display setting section for indicating whether or not overloading is provided.
I have. Further, the management station 1 is responsible for data transfer to each normal station.
And there is no response,
If an overload is set, the normal station is determined to be overloaded.
And an overload judging unit for rejecting. Further, the normal stations 2, 3, 4 and the management station 1
The data of the transmission frame transmitted by the transmission processing unit of the CPU 31
In the data section, a flag indicating whether or not the
Has a flag indicating which normal station is indicated.
It is configured to: First, the case where the load of the normal station 2 becomes heavy
Therefore, the normal station 2 sets the processing division flag 43 to the distributed control register.
A description will be given of the processing division of labor when the setting cannot be made to the star 40. One
That is, when the power of the normal station 2 with the load overload is turned off
Or the cable is disconnected or the overload flag is
An abnormal flag is sent to the management station 1 due to noise, attenuation of the communication signal, etc.
This is a description of processing when transfer cannot be performed. In FIG. 7, the management station 1
The normal station 2, normal station 3, and normal station 4 connected above each
Normal stations 2, 3, and 4 are overloaded or not overloaded
In order to check whether the transmission frame 49 is
Transfers and polls. The management station 1 is a negative station among the normal stations 2, 3, and 4.
This communication is continued until a loading station is found. In this example
In this case, since the normal station 2 is overloaded, the management station 1
Polling until overload station 2 confirms no response
I do. The management station 1 confirms that the normal station 2 does not respond.
Upon recognition, the transmission partner station overload flag in the transmission frame 49
47 is set to an overload flag of 1. And the other station
In command 46, 2 indicating normal station 2 is set as byte data.
And other normal stations 3 connected to the network,
Broadcast to the normal station 4 in the transmission frame 50
Send. The normal station 3 and the normal station 4 transmit the transmission frame 50
Transmission destination station overload flag 47, transmission destination station command 46
Received, the normal station 2 confirms that an overload has occurred.
The normal station 2 connected to the network
You. Thereafter, the management station 1 executes the processing with the lowest processing priority.
For the normal station 4 of priority 3, the normal station 4
Frame for stopping the processing of the processing priority 3
Transfer 52. That is, the transmission frame 52 includes
3 indicating stop is set in the flag 70 indicating stop, and processing for stopping
Priority 3 is set in the flag 71 indicating the priority of
ing. The normal station 4 sends the transmission frame 5
2 is received, the normal station 4 is executing the processing priority
Step 3 is stopped. Thereafter, the management station 1 changes to the normal station 4
On the other hand, the processing of the processing priority 1 which was performed by the normal station 2
Is executed by the transmission frame 53.
Install. That is, the transmission frame 53 is
A flag 1 indicating installation in the toll flag 72;
The flag 73 indicating the program of the installation process
The first program 1 is set. afterwards,
The management station 1 stores the program execution file in the distributed control register 40.
The lug 44 is set. Normally, the station 4
When the program execution flag 44 is set,
Set the distributed control execution flag 41 in the distributed control register 40
You. Then, the normal station 4 sets the distribution control register 40.
Processing division flag 43, program execution flag 44
Is cleared, and the processing of the processing priority 1 is executed. Then, the management station 1 sends the
When the load of the normal station 2 becomes normal, it connects to the other normal stations 3 and 4.
Let it. In this case, the returned normal station 2 has the processing priority.
3 or a normal station.
4 is changed to the processing of priority 3 and the normal station is changed.
2 may execute the processing of the processing priority 1
No. By the above operation, the processing priority 1
Overload occurs in the normal station 2 and the processing division of work flag 43
If it cannot be set in the distribution control register 40, the management station 1
Is acting as a substitute for the normal station 2 where the load overload has occurred.
Set the overload flag 47 and the transmission destination station command 46
Processing priority in normal stations with lower processing priority.
The process of the first place can be shifted and executed. Next, the case where the load of the normal station 3 becomes heavy
Thus, the normal station 3 sets the processing division flag 43 to the distributed control register.
A description will be given of the processing division of labor when the setting cannot be made to the star 40. One
In other words, the power of the normal station 3 where the overload occurred was turned off
Or the cable is disconnected or the overload flag is
An abnormal flag is sent to the management station 1 due to noise, attenuation of the communication signal, etc.
This is a description of processing when transfer cannot be performed. In FIG. 8, the management station 1 has a network
The normal station 2, normal station 3, and normal station 4 connected above each
Normal stations 2, 3, and 4 are overloaded or not overloaded
In order to check whether the transmission frame 49 is
Transfers and polls. The management station 1 is one of the normal stations 2, 3, and 4.
This communication is continued until a loading station is found. In this example
In general, since the load of the normal station 3 is excessive, the management station 1
Polling until the overload station 3 confirms that there is no response
I do. The management station 1 confirms that the normal station 3 does not respond.
Upon recognition, the transmission partner station overload flag in the transmission frame 49
47 is set to an overload flag of 1. And the other station
In command 46, 3 indicating normal station 3 is set as byte data.
And other normal stations 2 connected to the network,
Broadcast to the normal station 4 in the transmission frame 50
Send. The normal station 2 and the normal station 4 transmit the transmission frame 50
Transmission destination station overload flag 47, transmission destination station command 46
Received, the normal station 3 confirms that an overload has occurred.
The normal station 3 connected to the network
You. Thereafter, the management station 1 executes the processing with the lowest processing priority.
For the normal station 4 of priority 3, the normal station 4
Frame for stopping the processing of the processing priority 3
Transfer 52. That is, the transmission frame 52 includes
3 indicating stop is set in the flag 70 indicating stop, and processing for stopping
Priority 3 is set in the flag 71 indicating the priority of
ing. The normal station 4 sends the transmission frame 5
2 is received, the normal station 4 is executing the processing priority
Step 3 is stopped. Thereafter, the management station 1 changes to the normal station 4
On the other hand, the processing of the processing priority 2 performed by the normal station 3
Is executed by the transmission frame 53.
Install. That is, the transmission frame 53 is
The flag 1 indicating installation is set in the
Priority in the flag 73 indicating the program of the processing to be installed
The program 2 of the second place is set. Then manage
The station 1 stores a program execution flag in the distribution control register 40.
Set 44. The normal station 4 stores the program in the distributed control register 40.
When the program execution flag 44 is set,
Set the distributed control execution flag 41 in the distributed control register 40
You. Then, the normal station 4 sets the distribution control register 40.
Processing division flag 43, program execution flag 44
Is cleared, and the processing of the processing priority 2 is executed. Then, the management station 1 transmits the
When the load on the normal station 3 becomes normal, it connects to the other normal stations 2 and 4.
Let it. In this case, the returned normal station 3 has the processing priority.
3 or a normal station.
4 is changed to the processing of priority 3 and the normal station is changed.
3 may execute the processing of the processing priority 2
No. By the operation as described above, the processing priority 2
Overload occurs in the normal station 3 and the processing division of work flag 43
If it cannot be set in the distribution control register 40, the management station 1
Is acting as a substitute for the normal station 3 where the overload occurred,
Set the overload flag 47 and the transmission destination station command 46
Processing priority in normal stations with lower processing priority.
The process of the second place can be shifted and executed. Next, the case where the load of the normal station 2 becomes heavy
Therefore, the normal station 2 sets the processing division flag 43 to the distributed control register.
It can be set to the master 40, and the management station 1 is replaced with the normal station 2.
Instead, the transmission destination station overload flag 47 and the transmission destination station frame
The case where the command 46 can be set will be described. In FIG. 9, the management station 1 has a network
The normal station 2, normal station 3, and normal station 4 connected above each
Normal stations 2, 3, and 4 are overloaded or not overloaded
In order to check whether the transmission frame 49 is
Transfers and polls. The management station 1 is one of the normal stations 2, 3, and 4.
This communication is continued until a loading station is found. In this example
Since the normal station 2 is overloaded, the normal station 2
The processing division flag 43 of the control register 40 is processed.
It is set to 1 as shown. [0111] The management station 1 is a
Recognizing that the packet 43 is 1, the transmission frame 50
Set the overload flag of 1 to the overload flag 47 of the transmission destination station
You. Then, the normal station 2 is indicated in the transmission destination station command 46.
Set 2 in byte data and connect to network
The other normal station 3 and the normal station 4 that are
To broadcast. The normal station 3 and the normal station 4 transmit the transmission frame 50
Transmission destination station overload flag 47, transmission destination station command 46
Received, the normal station 2 confirms that an overload has occurred.
The normal station 2 connected to the network
You. Thereafter, the management station 1 executes the processing with the lowest processing priority.
For the normal station 4 of priority 3, the normal station 4
Frame for stopping the processing of the processing priority 3
Transfer 52. That is, the processing is stopped in the transmission frame 52.
The flag 70 indicating “stop” indicates “3” indicating the stop, and
Priority 3 is set in the flag 71 indicating the priority.
You. The normal station 4 transmits the transmission frame 5 from the management station 1.
2 is received, the normal station 4 is executing the processing priority
Step 3 is stopped. Thereafter, the management station 1 changes to the normal station 4
On the other hand, the processing of the processing priority 1 which was performed by the normal station 2
Is executed by the transmission frame 53.
Install. That is, the transmission frame 53 is
A flag 1 indicating installation in the toll flag 72;
The flag 73 indicating the program of the installation process
The first program 1 is set. afterwards,
The management station 1 stores the program execution file in the distributed control register 40.
The lug 44 is set. The normal station 4 stores a program in the distribution control register 40.
When the program execution flag 44 is set,
Set the distributed control execution flag 41 in the distributed control register 40
You. Then, the normal station 4 sets the distribution control register 40.
Processing division flag 43, program execution flag 44
Is cleared, and the processing of the processing priority 1 is executed. Then, the management station 1 sends the
When the load of the normal station 2 becomes normal, it connects to the other normal stations 3 and 4.
Let it. In this case, the returned normal station 2 has the processing priority.
3 or a normal station.
4 is changed to the processing of priority 3 and the normal station is changed.
2 may execute the processing of the processing priority 1
No. With the above operation, the processing priority 1
Overload occurs in the normal station 2 and the processing division of work flag 43
Even if the distribution control register 40 can be set,
Shift the processing of processing priority 1 to the normal station of lower priority and execute it.
Can be done. Next, in the case where the load on the normal station 3 becomes heavy,
Thus, the normal station 3 sets the processing division flag 43 to the distributed control register.
Can be set to the master station 40, and the management station 1 is also the
The transmission destination station overload flag 47 and the transmission destination station command 4
6 will be described. Referring to FIG. 10, the management station 1
The normal station 2, the normal station 3, and the normal station 4 connected on the network
Each normal station 2, 3, 4 is overloaded or not overloaded.
At regular intervals, check the transmission frame 49
And polling. The management station 1 is one of the normal stations 2, 3, and 4.
This communication is continued until a loading station is found. In this example
Since the normal station 3 is overloaded, the normal station 3
The processing division flag 43 of the control register 40 is processed.
It is set to 1 as shown. The management station 1 is responsible for the processing division of the load overload station 3.
Recognizing that the packet 43 is 1, the transmission frame 50
Set the overload flag of 1 to the overload flag 47 of the transmission destination station
You. Then, the normal station 3 is indicated in the transmission destination station command 46.
Set 3 with byte data and connect to the network
The other normal station 2 and normal station 4 that are
To broadcast. The normal station 2 and the normal station 4 transmit the transmission frame 50
Transmission destination station overload flag 47, transmission destination station command 46
Received, the normal station 3 confirms that an overload has occurred.
The normal station 3 connected to the network
You. Thereafter, the management station 1 executes the processing with the lowest processing priority.
For the normal station 4 of priority 3, the normal station 4
Frame for stopping the processing of the processing priority 3
Transfer 52. That is, the transmission frame 52 includes
3 indicating stop is set in the flag 70 indicating stop, and processing for stopping
Priority 3 is set in the flag 71 indicating the priority of
ing. The normal station 4 sends the transmission frame 5
2 is received, the normal station 4 is executing the processing priority
Step 3 is stopped. Thereafter, the management station 1 changes to the normal station 4
On the other hand, the processing of the processing priority 2 performed by the normal station 3
Is executed by the transmission frame 53.
Install. That is, the transmission frame 53 is
A flag 1 indicating installation in the toll flag 72;
The flag 73 indicating the program of the installation process
The program 2 of the second priority is set. afterwards,
The management station 1 stores the program execution file in the distributed control register 40.
The lug 44 is set. The normal station 4 stores the program in the distributed control register 40.
When the program execution flag 44 is set,
Set the distributed control execution flag 41 in the distributed control register 40
You. Then, the normal station 4 sets the distribution control register 40.
Processing division flag 43, program execution flag 44
Is cleared, and the processing of the processing priority 2 is executed. Then, the management station 1 sends the
When the load on the normal station 3 becomes normal, it connects to the other normal stations 2 and 4.
Let it. In this case, the returned normal station 3 has the processing priority.
3 or a normal station.
4 is changed to the processing of priority 3 and the normal station is changed.
3 may execute the processing of the processing priority 2
No. With the above operation, the processing priority 2
Overload occurs in the normal station 3 and the processing division of work flag 43
Even if the distribution control register 40 can be set,
The processing of processing priority 2 is shifted to the normal station of lower priority and executed.
Can be done. In the above embodiment, the transmission
Frames 49, 50, 51, 52, and 53 are header sections
And the data section.
Lag 45, transmission destination station command 46, transmission destination station overload
Lag 47, processing stop flag 70, processing priority flag 7
1, installation flag 72, processing program flag 7
3 is set, but these commands and
Even if the lag is set in the header section instead of the data section,
Various effects can be obtained. [0128] The present invention is configured as described above.
Has the following effects. The message where the error occurred
When the normal station cannot transfer the error flag to the management station
Also delegated by the management bureauso, Abnormal flag and normal where the error occurred
Stations are transferred to other communication stations on the network and processed in order of priority.
Other stations with the lowest rankButStop the current processSa
LetThe normal station where the error occurred can be processed
You. For this reason, the normal station in which no abnormality has occurred
Is normal, while performing a low priority distribution function,
At the time, it is possible to execute a process with high priority of another station.
Therefore, a highly reliable decentralized controller is constructed with an inexpensive configuration
There is an effect that can be. Therefore, the number of connections
Inexpensive configurations, even under restricted network conditions
System, super-dispersion control, telescopic operation control, degeneration operation control system
There is an effect that the system can be configured. Further, the normal station in which the load overload has occurred
Even when the overload flag cannot be transferred to the management station,
Is deputysoNetwork with the overload flag and the overloaded normal station.
Transfer to another communication station on the work, processing priority is lowest
Other normal stationsButStop the current processLet, Overload
The processing of the normal station in which the load has occurred can be performed. For this reason, the normal load-free state
In normal operation, the station performs a low priority distributed function while
When the load is overloaded, it is possible to execute the process with higher priority of other stations.
It can be easily distributed with a low-cost configuration and highly reliable
There is an effect that a control device can be configured. Yo
Under network conditions where the number of connections is limited
Inexpensive configuration, super-dispersion control, telescopic operation control, degenerate operation
There is an effect that a rotation control system can be configured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a distributed control device according to a first embodiment of the present invention. FIG. 2 is an internal configuration diagram of a management station in the example of FIG. FIG. 3 is an internal configuration diagram of a normal station in the example of FIG. 1; FIG. 4 is an operation block diagram when the normal station 3 becomes abnormal and an abnormal flag cannot be set in the example of FIG. 1; FIG. 5 is an operation block diagram in a case where the normal station 2 is abnormal but an abnormal flag can be set in the example of FIG. 1; FIG. 6 is an operation block diagram in a case where the normal station 3 is abnormal but an abnormal flag can be set in the example of FIG. 1; FIG. 7 is a schematic configuration diagram of a distributed control device according to a second embodiment of the present invention. 8 is an operation block diagram when the load on the normal station 3 is heavy and the processing division flag cannot be set in the example of FIG. 7; 9 is an operation block diagram in a case where the load on the normal station 2 becomes heavy and a processing division flag can be set in the example of FIG. 7; FIG. 10 is an operation block diagram in a case where the load on the normal station 3 becomes heavy and a processing division flag can be set in the example of FIG. 7; FIG. 11 is a schematic configuration diagram of a conventional distributed switching system. FIG. 12 is a schematic configuration diagram of an example of a distributed control device that can cope with an abnormality. [Description of Signs] 1 Management station 2, 3, 4 Normal station 30 Transmission path 31 CPU 32 ROM 33 RAM 34 Transmission controller 35 Internal bus 36 External ROM 37 External RAM 38 Memory expansion bus 40 Distributed control register 41 Distributed control execution flag 42 Abnormality flag 44 Program execution flag 45 Transmission partner station abnormality flag 46 Transmission partner station command 47 Transmission partner station overload flag 49-53 Transmission frame

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04L 12/28 H04L 12/40 G06F 13/00

Claims (1)

(57) [Claims] [Claim 1] Distributed control for recognizing that received data is valid data and notifying the destination that the data is not valid if the data is not valid data. In a distributed control device including a plurality of normal stations and a management station that performs distributed and centralized control by transmitting and receiving data to and from the plurality of normal stations, each of the plurality of normal stations determines whether the control is centralized control or distributed control. A distributed control setting unit that displays the determined control content; an abnormal display setting unit that determines whether the function of the normal station is normal, abnormal , or overloaded , and indicates a determination result ; A process sharing request display setting unit that determines whether to request the sharing of the processing performed by the normal station to another normal station, and displays the processing sharing request display setting unit. Determining the priority of station processing The previous rank determination unit, the source and at least shows the header portion of a destination, whether normal or abnormal, or a flag indicating whether overweight or not, the normal or abnormal or, or normal station which overweight whether showed Is a flag indicating which normal station, a flag indicating whether or not to request the sharing of the processing being executed to another normal station, and which normal station is requesting the sharing of the processing. And a transmission processing unit for transmitting a transmission frame including a data portion having a flag indicating the transmission to another normal station or a management station, wherein the management station has no data transfer to each of the normal stations. If the response is a response , or if there is an error or
If the weight is set, the normal station is abnormal or
Indicates an abnormality judging unit for judging an overload , a header part indicating at least a transmission source and a destination, a flag indicating whether the operation is normal, abnormal , or excessive, and indicating whether the operation is normal, abnormal , or excessive. A flag indicating which of the normal stations the normal station has, a flag indicating whether or not to request sharing of the processing being executed to another normal station, and a normal station requesting the sharing of the processing are: which transmission frame comprising the data portion typically having a flag indicating whether the station, and a transmission processing section that transmits to the other normal station, the management station, in the abnormality determining unit, abnormal or
When a normal station determined to be overloaded occurs, the transmission
Is transmitted to other normal stations,
The program that was processed by the determined normal station is
A distributed control device that is installed in the normal station with the lowest priority .