JP2003032650A - Control system unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in a conventional control system unit wherein a phenomenon that images are stopped at a moment is generated since delay is generated until abnormality of a distribution card is detected by a server and the distribution card is changed, when a distribution card for distributing image data is damaged. SOLUTION: This control system unit is so constituted that image data are supplied from an image card 2 to a distribution card 3 selected by a CPU card 1, and the image data are distributed to a network. The image card 2 is provided with a transmission buffer storing function 4 for storing the image data supplied to the distribution card 3, and a normal transmission deciding function 5 which stores how far image data are distributed normally to the network by the distribution card. When the distribution card 3 which is in a course of distribution to the network gets damaged, the defective distribution card 3 informs the trouble to the CPU card 1. Another distribution card 3 is selected by the CPU card 1 which received the information, and image data are distributed so as not to cause falling out of a packet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system device for switching to a normal distribution card when an abnormality occurs in the distribution card in an industrial computer having a distribution card for supplying a video and a distribution card for distributing a video. Regarding

[0002]

2. Description of the Related Art In the prior art, when a distribution card that distributes video data fails, it is manually switched when switching to a normal distribution card, or the server detects an abnormality in the distribution card and switches the distribution card. There is a system.

[0003]

According to the prior art, when the distribution card for distributing the video data fails and the network connected to the receiving side becomes abnormal, the server detects the abnormality of the distribution card. Then, the distribution card that became abnormal was switched to a normal one. However, there is a delay before the server detects and switches the distribution card.
Therefore, since the image during the delay was discarded, there was a phenomenon in which the image stopped for a moment.

The present invention has been made in order to solve the above-mentioned problems, and controls for shortening the time for switching the distribution card and eliminating the omission of distribution of video data when switching the distribution card. The purpose is to obtain a system unit.

[0005]

In a control system apparatus according to the present invention, any one of a plurality of distribution cards is configured to distribute video data to a network and detect a failure of itself. , A CPU card for selecting a first distribution card to be distributed to the network among the plurality of distribution cards, and supplying video data to the first distribution card selected by this CPU card, and to the first distribution card. A video card having a transmission buffer storage function for storing the supplied video data and a normal transmission determination function for storing how much video data is normally distributed to the network by the first distribution card is selected by the CPU card, When the first distribution card that is distributing video data to the network fails, the first distribution The card notifies the CPU card of the failure, and the notified CPU card switches the distribution card that distributes the video data to the network to the second distribution card, and the information of the transmission buffer accumulation function and the normal transmission determination function. Based on the above, the distribution is controlled to be distributed from the video data next to the normally distributed video data.

Further, one of the plurality of distribution cards configured to select one of them and distribute the video data to the network and to detect its own failure, and to distribute to the network among the plurality of distribution cards A shared memory having information for selecting the distribution card of No. 1 and a video card for supplying video data to the first distribution card to be distributed to the network based on the information of this shared memory are provided. When the first distribution card that is delivering video data fails, the first distribution card writes its own failure information in the shared memory, and the video card uses the failure information of the first distribution card in the shared memory. , To supply video data to the second distribution card. In addition, the video card has a transmission buffer storage function that stores the video data supplied to the first distribution card and a normal transmission determination function that stores how much video data is normally distributed to the network by the first distribution card. I have.

Further, one of the two distribution cards is configured to select one of them to distribute the video data to the network and to detect its own failure, and a video card for supplying the video data to the two distribution cards. And a CPU card that selects the first distribution card of the two distribution cards to be distributed to the network. When the first distribution card selected by the CPU card and distributing the video data to the network fails, One delivery card is
Notify the CPU card of the failure and information indicating to what extent the video data was normally delivered to the network, and
The CPU card that received the notification switches the distribution card that distributes the video data to the network to the second distribution card,
The video data is controlled to be distributed from the video data that follows the normally distributed video data. In addition, one of the two distribution cards is configured to select one of them to distribute the video data to the network and to detect its own failure, and a video card that supplies the video data to the two distribution cards. A CPU card that selects the first distribution card to be distributed to the network among the two distribution cards, and a transmission management common table that has failure information of the two distribution cards and information about how well the video data has been distributed to the network, When the first distribution card selected by the CPU card and distributing the video data to the network fails, the first distribution card writes its own failure information in the transmission management common table and also based on the transmission management common table. , The next video of the video data normally distributed by the second distribution card that has not failed It is intended to be delivered from over data.

[0008] Further, one of the two distribution cards configured to distribute the video data to the network by selecting one of them, the video card supplying the video data to the two distribution cards, and the two distribution cards A CPU card for selecting the first distribution card to be distributed to the internal network, a live data common table having live data written by the two distribution cards and information on how well the video data is normally distributed to the network. When the failure of the first distribution card that is selected by and is being distributed to the network is determined by the live data in the live data common table, the video data that was normally distributed by the second distribution card that has not failed is It is distributed from the following video data.

Furthermore, any one of the plurality of distribution cards configured to distribute the video data to the network and detect the failure of itself, and to distribute the plurality of distribution cards to the network. The CPU card includes a CPU card having a transmission data buffer for selecting one distribution card and storing the video data distributed by the first distribution card, and a video card for supplying the video data to the transmission buffer of the CPU card. When the first distribution card, which is selected by, and is distributing video data to the network, fails, the first distribution card notifies the CPU card of the failure, and the notified CPU card notifies the network of the video data. Switch the delivery card that delivers the Normally video data to detect whether delivered to the network, and controls to deliver the next video data successfully delivered video data.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a diagram showing a system configuration of a control system device according to a first embodiment of the present invention. In FIG. 1, 1 is a CPU card on which an application is installed, 2 is a video card to which a video device such as a camera is connected, 3 is a distribution card for transmitting video data to a network, and a CPU card 1 and a video card 2 are provided. The distribution card 3 is connected by the system bus. Reference numeral 4 is a transmission buffer storage function of the video card 2 for storing the transmitted video for a certain period, and reference numeral 5 is a normal transmission determination function of the video card 2 for determining which video data has been normally transmitted. In FIG. 1, the current distribution card 3 is # 1.
~ # 3 are connected, and a state is shown in which video data is transmitted from the distribution card # 1 (first distribution card) to the network. FIG. 2 shows the first embodiment of the present invention.
5 is a flowchart showing initialization of an application of a CPU card of the control system device according to FIG. FIG. 3 is a diagram showing the contents of the memory of the distribution card of the control system device according to the first embodiment of the present invention. FIG. 4 is a flowchart showing application processing when a distribution card of the CPU card of the control system device according to the first embodiment of the present invention is abnormal. FIG. 5 is a flowchart showing a video card switching process of the control system device according to the first embodiment of the present invention.

Next, the operation will be described. First, FIG.
The initialization processing of the application of the CPU card 1 will be described using. A step S1 teaches the video card 2 the start address of the memory of the distribution card 3. Data exchange between the video card 2 and the distribution card 3 is performed by the video card 2 writing video data in the memory of the distribution card 3. A step S2 gives an instruction as to which distribution card 3 among the plurality of distribution cards 3 transmits the video to the network. Here, an example is shown in which a transmission command is issued to distribution data # 1. FIG. 3 shows a portion of the memory of the distribution card 3 for storing the video,
This memory is visible from the video card 2, and shows a configuration example of two backs. Video card 2
Video data is written in this memory in the order of video data # 1 → video data # 2 → video data # 1. The distribution card 3 sequentially transmits the written video data to the network.

Next, a method of delivering video data will be described with reference to FIG. When the video image is stored, the video card 2 first writes the video data in the video data # 1 in the memory of the distribution card 3. After that, the presence / absence flag of the video data # 1 is set to 1 (= present), and the transmission result is set to 0 (= unprocessed). The distribution card 3 has the presence / absence flag of the video data # 1 set to 1
It is judged that there is video data, and the video data is transmitted to the network. After the transmission is completed, the presence flag is set to 0 (= none), the transmission result is set to 1 (= normal transmission) if the transmission is normal, and the transmission result is set to 2 (= abnormal) if the transmission is abnormal. The video card 2 stores in its own internal memory whether or not the video data has been correctly sent by looking at the transmission result. Next, the video card 2 writes the next video data in the video data # 2 in the same procedure as at the beginning. The distribution card 3 detects that the presence / absence flag of the video data # 2 has become 1, and transmits the video data to the network. This process is sequentially performed and the video data is transmitted to the network.

Next, the processing contents of the CPU card when the distribution card becomes abnormal will be described with reference to FIG. If the distribution card 3 fails, the distribution card 3
An error instruction is issued to the application installed in the card 1. As a result, the application detecting the abnormality switches the distribution card 3. Step S11
Obtains the failure information from the distribution card 3. As a result, the application determines that the distribution card # 1 has become abnormal and the distribution card # 1 (the first distribution card has to be switched. In step S12, since the distribution card # 1 has become abnormal, the distribution card # 1. A distribution start command, which is a request to switch to 2 (second distribution card), is issued, whereby distribution card # 2 starts preparing to send the video data to the network.
As a result, since the distribution card # 1 becomes abnormal, a command is issued to the video card 2 to transmit the video data from the distribution card # 2 (teach the memory start address of the distribution card # 2). The video card 2 recognizes that it is necessary to transmit video data from the distribution card # 2 because the distribution card # 1 has failed.

Next, the switching process performed by the video card when the delivery card is switched will be described with reference to FIG. In step S21, the video card 2
Obtain the distribution card 3 switching instruction from the application. As a result, the top address of the distribution card 3 to be transmitted next is obtained. In step S22, the video card 2
Determines whether the data up to now has been normally transmitted due to the switching of the distribution card 3. In this process, it can be determined by looking at the transmission result stored in the memory of the video card 2 in advance. The video card 2 uses the transmission buffer storage function 4 to
It stores a certain amount of video data. It transmits from the data next to the data that was transmitted normally among the stored data. A step S23 transfers the video data from the data next to the data normally transmitted to the distribution card # 2. This allows delivery card # 1 without dropping packets.
Can switch to distribution card # 2. The processing after switching is performed in the same manner as the exchange between the distribution card # 1 and the video card 2.

According to the first embodiment, since a certain amount of video data is stored in the transmission buffer storage function, it is possible to transmit the data next to the data that could be normally transmitted among the stored data. It is possible to switch the delivery card without losing packets.

Embodiment 2. FIG. 6 is a diagram showing a system configuration of a control system device according to Embodiment 2 of the present invention. 6, 1 to 3 are the same as those in FIG. 6 is when the distribution card 3 fails,
It is a shared memory that stores from which distribution card the data is transmitted next. FIG. 6 shows a state in which distribution cards # 1 to # 3 are currently connected and video data is being transmitted from distribution card # 1 to the network.

FIG. 7 is a diagram showing the contents of the shared memory of the control system device according to the second embodiment of the present invention. In the case where the distribution card fails, which distribution card is to be transmitted next is stored. There is. The shared memory 6 is set by an application installed in the CPU card 1 at the time of initialization. The shared memory 6 may be provided with a dedicated memory, or the memory in the CPU card 1 may be mapped and used as a shared memory. Next, the contents of the shared memory 6 will be described. The number of distribution cards indicates the number of distribution cards inserted in the system. Current,
Since 3 sheets are inserted, it is described as 3. Next, describe the name of the distribution card that starts distribution at the very beginning. Here, it is described as distribution card # 1. Next, when the distribution card # 1 is broken, the name of the distribution card to be transmitted next is described. (The distribution card name to start the distribution second is described.) Next, when the distribution card # 2 is broken, the distribution card name to be transmitted next is described. (The third distribution card name to start distribution is described.) Also, the distribution card of this shared memory 6 has a ring structure, and when the distribution card # 3 is broken, the distribution card to be transmitted next. The card is the distribution card # 1 which starts transmission at the very beginning.
Is shown.

The "memory head address of the distribution cards # 1 to # 3" in the remaining portion of the shared memory 6 is a memory mounted on the distribution card 3 and indicates the head address of the memory seen from the video card 2. Video data is exchanged by the memory. “Status of distribution cards # 1 to # 3” in the shared memory 6
Describes information about whether the distribution card 3 is normal or abnormal. This information is described by the distribution card 3 by itself when the distribution card 3 is broken. The exchange of data between the distribution card 3 and the video card 2 is the same as that in the first embodiment, and is omitted here.

Next, the operation when the delivery card # 1 fails will be described. When a failure occurs in the distribution card # 1, it is described as abnormal in the "state of the distribution card # 1" portion of the shared memory map of FIG. Video card 2
Is polling the shared memory 6 and the distribution card #
Judge that 1 has become abnormal. Information that the distribution card # 2 is to be sent next when the distribution card # 1 fails is written in the shared memory 6. Therefore, the video card 2 transfers the video data to the distribution card # 2. Distribution card # 2 polls the contents of the memory of distribution card 3 shown in FIG. 3 and learns that it will start transmitting. As a result, the distribution card # 2 starts transmitting.

As described above, according to the second embodiment, by providing the shared memory 6 that can refer to the distribution card 3 and the video card 2, the distribution card can be switched without the instruction of the application installed in the CPU card 1. You can Therefore, high-speed switching processing can be realized and packet omission can be reduced.

Embodiment 3. FIG. 8 is a diagram showing a system configuration of a control system device according to Embodiment 3 of the present invention. In FIG. 8, 1 to 5 are the same as those in FIG.
6 are the same as those in FIG. In FIG. 8, distribution cards # 1 to # 3 are currently connected,
A state in which video data is being transmitted from distribution card # 1 to the network is shown. The contents of the shared memory 6 are the same as those in the second embodiment, and are set by the application installed in the CPU card 1 at the time of initialization. The exchange of the video data between the video card 2 and the distribution card 3 is the same as that in the first embodiment, and therefore will be omitted here.

Next, the operation when the distribution card # 1 fails when transmitting the video data from the distribution card # 1 to the network will be described with reference to FIGS. When the distribution card # 1 fails, the distribution card # 1 is described as abnormal in the "state of the distribution card # 1" portion of the shared memory in FIG. The video card 2 is polling the shared memory 6 and determines that the distribution card # 1 has failed. The video card 2 refers to the information written in the shared memory 6 and knows that when the distribution card # 1 fails, the video card 2 transmits to the distribution card # 2. The video card 2 is shown in FIG.
By referring to the contents of the memory of the delivery card 3 of FIG. After that, from the video data stored by the transmission buffer storage function 4 in FIG. 8, it is determined which of the next video data has been normally transmitted. The video card 2 delivers the following video data to the distribution card # 2.
Write to the memory of the delivery card. Delivery card # 2 is
It polls the memory of the distribution card and determines that video data has been transmitted. As a result, the distribution card # 2 transmits the video data to the network.

According to the third embodiment, as a result, the distribution card can be switched without the intervention of an application, and the switching can be performed without loss of video data.

Fourth Embodiment FIG. 9 is a diagram showing a system configuration of a control system device according to Embodiment 4 of the present invention. 9, 1 to 3 are the same as those in FIG. FIG. 9 shows current distribution cards # 1 and # 2.
Is connected and video data is being transmitted from the distribution card # 1 to the network. FIG. 10 is a flowchart showing an application process when a distribution card of the CPU card of the control system device according to the fourth embodiment of the present invention is abnormal.

The fourth embodiment will be described with reference to FIGS. 2 and 3. First, the initialization state of the application installed in the CPU will be described with reference to FIG. In step S1, the video card 2 is instructed about the head addresses of the distribution card # 1 and distribution card # 2 memories. Step S2 is a process of issuing a distribution start instruction to the distribution card # 1. In response to this, distribution card # 1 prepares to send video data to the network. Distribution cards # 1 and # 2 are respectively shown in FIG.
It has the memory contents shown in, and can be seen from the video card by mapping. Video card 2
Transmits the video data to distribution card # 1 and distribution card # 2 at the same time. Since only the distribution card # 1 has issued the distribution request, the video data is transmitted from the distribution card # 1 to the network. Since the exchange of the video data between the video card and the distribution card is the same as that in the first embodiment, it is omitted here.

Next, referring to FIG. 10, the processing of the application installed in the CPU card 1 when the distribution card is abnormal will be described. When the distribution card # 1 becomes abnormal, the application is notified with abnormal information and a sequential NO indicating how far the application has been transmitted. Sequential NO
Passes the one added to the video data. Step S31 shows a process in which the application receives the abnormality information and the sequential NO from the distribution card # 1. As a result, it can be seen that the distribution card # 1 has become abnormal. Next, in step S32, since the distribution card # 1 has become abnormal, the distribution card is switched to the distribution card # 2.
Give a delivery start instruction to. Here, a delivery request and a sequential NO indicating how normally the transmission was performed are passed. The distribution card # 2 receives a distribution request from the application and a sequential NO indicating how successfully the transmission was performed. Video card 2 is distribution card # 1 and distribution card #
Video data is written in both of them. Therefore, the distribution card # 2 always receives the video data. The distribution card # 2 starts transmission to the network from the video data next to the sequential NO received from the application.

According to the fourth embodiment, since the video card writes the video data in both the distribution card # 1 and the distribution card # 2, it is possible to prevent the packet omission when switching.

Embodiment 5. 11 is a diagram showing a system configuration of a control system device according to a fifth embodiment of the present invention. 11, 1 to 3 are the same as those in FIG. Reference numeral 7 denotes a transmission management common table showing the contents of how much the video data has been normally transmitted.
The distribution cards # 1 and # 2 are currently connected, and the distribution card # 1 is transmitting video data to the network. FIG. 12 is a diagram showing a transmission management common table of the control system device according to the fifth embodiment of the present invention.

The fifth embodiment will be described with reference to FIGS. 2 and 3. First, the initialization state of the application installed in the CPU card 1 will be described with reference to FIG. In step S1, the video card 2 is instructed of the start addresses of the memories of the distribution card # 1 and the distribution card # 2. Step S2 is a process of issuing a distribution start instruction to the distribution card # 1. In response to this, the distribution card # 1 prepares to send the video data to the network. Delivery cards # 1, # 2
Each have the memory contents shown in Figure 3,
The mapping makes it visible from the video card. The video card 2 simultaneously transmits video data to the distribution card # 1 and the distribution card # 2. The exchange of the video data between the video card and the distribution card is the same as that in the first embodiment, and will not be repeated here. Since only the distribution card # 1 has issued the distribution request, the video data is transmitted to the network only from the distribution card # 1.

Next, with reference to FIG. 12, the operation of the transmission management common table showing to what extent the video data has been normally transmitted will be described. The distribution card # 1 outputs the sequential NO (added to the video data) of the video data transmitted every time the video data is transmitted to the network.
The transmission management common table 7 is written. As a result, by looking at the sequential NO, it is possible to know to what extent the transmission was successful. “Distribution card # 1, # 2 status” of the transmission management common table 7 is information indicating whether the card is normal or abnormal. When Delivery Card # 1 becomes abnormal,
The "delivery card # 1 status" in the transmission management common table 7 is set to be abnormal.

Next, the case where the distribution card # 1 becomes abnormal during transmission of video data will be described. Delivery card #
When 1 is abnormal, the "delivery card # 1 status" of the transmission management common table 7 is made abnormal. The distribution card # 2 polls the transmission management common table 7 and detects that the distribution card # 1 has become abnormal. Delivery card # 2
Starts transmission to the network from the video data of the sequential NO next to the sequential NO written in the transmission management common table 7.

According to the fifth embodiment, the distribution card 3 is
It is possible to switch the distribution card immediately without the request for switching from the application. Further, the sequential NO stored in the transmission management common table can prevent the packet loss of the video data at the time of switching.

Sixth Embodiment FIG. 13 is a diagram showing a system configuration of a control system device according to a sixth embodiment of the present invention. 13, 1 to 3 are the same as those in FIG. Reference numeral 8 is a live data common table that stores live data indicating whether the distribution cards # 1 and # 2 are normal or abnormal. In FIG. 13, the distribution cards # 1 and # 2 are currently connected, and the distribution card #
1 shows a state in which video data is being transmitted from 1 to the network. FIG. 14 is a diagram showing a live data common table of the control system device according to the sixth embodiment of the present invention.

The sixth embodiment will be described with reference to FIGS. 2 and 3. First, the initialization state of the application installed in the CPU card 1 will be described with reference to FIG. Step S1 is a process of instructing the video card 2 of the start addresses of the memories of the distribution card # 1 and the distribution card # 2. Step S2 is a process of issuing a distribution start instruction to the distribution card # 1. In response to this, the distribution card # 1 prepares to send the video data to the network. Delivery cards # 1, # 2
Each have the memory contents shown in Figure 3,
The mapping makes it visible from the video card 2. The video card 2 distributes the video data to the distribution card # 1,
Send to distribution card # 2 at the same time. The exchange of the video data between the video card 2 and the distribution card 3 has been described in the first embodiment, and will be omitted here. Since only the distribution card # 1 has issued the distribution request, the video data is transmitted to the network only from the distribution card # 1.

Next, the operation of the live data common table for determining whether the distribution card is normal or abnormal will be described with reference to FIG. In the sequence NO of FIG. 14, the sequential NO that the distribution card 3 transmitting to the network has added to the video data is stored.
The distribution card 3 updates the sequence number only when the transmission is normal. "Distribution cards # 1 and # 2 live data" are sequentially incremented from 1 by the distribution card. For example, in the distribution card # 1, the portion of the “distribution card # 1 live data” is 1 to 0xFFF.
Update to FFFFF every 1 ms. 0xFFF
After incrementing to FFFFF, it returns to 1. Similarly, the distribution card # 2 also updates the part of the "distribution card # 2 live data". If both the distribution card # 1 and the distribution card # 2 are in a normal state, the live data will be incremented.

Next, a case where the distribution card # 1 becomes abnormal will be described. When the delivery card # 1 becomes abnormal, the live data in the live data common table 8 is not updated. Therefore, the live data remains stopped. The distribution card # 2 checks the live data common table 8 every 1 ms, and the live data of the distribution card # 1 remains unchanged for 10 ms to detect that the distribution card # 1 has become abnormal. . The distribution card # 2 looks at the sequence number of the live data common table 8 and determines to what extent the transmission has been normally performed. The distribution card # 2 starts transmission to the network from the next sequential NO data.

According to the sixth embodiment, with the above contents, the distribution data can be switched without intervention of the application, and the switching can be performed at high speed. Also, because the video data is managed by sequential NO,
No packet loss due to switching.

Embodiment 7. FIG. 15 is a diagram showing a system configuration of a control system device according to Embodiment 7 of the present invention. 15, 1 to 3 are the same as those in FIG. Reference numeral 9 denotes a transmission data buffer for storing video data, which is provided in the CPU card 1. FIG. 15 shows a state where the distribution cards # 1 and # 2 are currently connected and the distribution card # 1 is transmitting video data to the network. FIG. 16 is a diagram showing the contents of the transmission data buffer of the control system device according to the seventh embodiment of the present invention.

The seventh embodiment will be described with reference to FIG. First, the initialization of the application installed in the CPU card 1 will be described. The application issues a distribution start instruction to the distribution card # 1. In response to this, the distribution card # 1 prepares to send the video data to the network.

Next, the operation of the transmission data buffer 9 of the CPU card of FIG. 16 will be described. The write pointer / read pointer is initialized to 0. The write pointer is incremented when the video data is written, and the read pointer is incremented after the application reads the video data and sends it to the distribution card 3. The transmission data buffer 9 can store up to N transmission buffers. The video card 2 transfers the video data to the video data # 1 in the transmission data buffer 9 and adds 1 to the write pointer. When the application completes the transfer of the video data # 1 to the distribution card 3, the application adds 1 to the read pointer. The video card 2 transfers the video data to the video data # 2 in the transmission data buffer 9 and increments the write pointer by 1. The application adds 1 to the read pointer when the transfer of the video data # 2 to the distribution card is completed. In this way, by operating the write pointer / read pointer, it is possible to know how much data is stored and how much video data is transmitted.
The distribution cards # 1 and # 2 have the memory contents shown in FIG. 3, respectively, and are made visible to the CPU card by mapping. The CPU card 1 transmits the video data only to the distribution card # 1. Since only the distribution card # 1 has issued the distribution request, the video data is transmitted from the distribution card # 1 to the network.

Next, a method of transferring video data will be described with reference to FIG. When the video is stored, the application first writes the video data into the video data # 1 in the memory of the distribution card 3. After that, the presence / absence flag of the video data # 1 is set to 1 (= present), and the transmission result is set to 0 (= unprocessed). The distribution card 3 sees that the presence / absence flag of the video data # 1 has become 1, determines that there is video data, and transmits the video data to the network. After the transmission is completed, the presence flag is set to 0 (= none), the transmission result is 1 (= normal transmission) if the transmission is normal, and the transmission result is 2 (=) if the transmission is abnormal.
Abnormal). Next, the application writes the next video data in the video data # 2 in the same procedure as at the beginning. The distribution card 3 has the presence / absence flag of the video data # 2 set to 1
When it is detected, the video data is transmitted to the network. This process is sequentially performed and the video data is transmitted to the network.

Next, a case where the distribution card # 1 becomes abnormal will be described. When the distribution card # 1 becomes abnormal, the application is notified of the abnormality. The application that has received the abnormality notification looks at the contents of the memory of the distribution card # 1 and determines to what extent the transmission was successful. The application searches the next data transmitted normally from the transmission data buffer mounted on the CPU card.
Next, the application issues a distribution request to the distribution card # 2. Then, the next data transmitted normally is written in the memory of the distribution card # 2. The distribution card # 2 transmits the video data to the network.

According to the seventh embodiment, by storing data in the transmission data buffer 9, it is possible to prevent omission of video data when the distribution card is switched.

[0044]

Since the present invention is constructed as described above, it has the following effects. Select one of the distribution cards configured to distribute video data to the network and detect its own failure, and select the first distribution card of the distribution cards to distribute to the network. To the CPU card and the first distribution card selected by this CPU card, and to what extent is the transmission buffer storage function for storing the video data supplied to the first distribution card and the first distribution card When a first distribution card which is selected by the CPU card and is distributing the video data to the network has a failure, One delivery card is
Notify the CPU card of the failure and receive the notification C
The PU card switches the distribution card that distributes the video data to the network to the second distribution card, and distributes from the video data next to the normally distributed video data based on the information of the transmission buffer storage function and the normal transmission determination function. Since it is controlled so that it can switch the failed delivery card in a short time, it is possible to prevent the loss of video data.

In addition, one of the plurality of distribution cards configured to select one of them and distribute the video data to the network and to detect its own failure, and to distribute to the network among the plurality of distribution cards A shared memory having information for selecting the distribution card of No. 1 and a video card for supplying video data to the first distribution card to be distributed to the network based on the information of this shared memory are provided. When the first distribution card that is delivering video data fails, the first distribution card writes its own failure information in the shared memory, and the video card uses the failure information of the first distribution card in the shared memory. Since the video data is supplied to the second distribution card, it is possible to switch the distribution card at high speed without the intervention of a CPU card. Can. In addition, the video card has a transmission buffer storage function that stores the video data supplied to the first distribution card and a normal transmission determination function that stores how much video data is normally distributed to the network by the first distribution card. Since it has, it is possible to switch the distribution card without missing the video data.

Furthermore, one of the two distribution cards is configured to select one of them to distribute the video data to the network and to detect its own failure, and a video card for supplying the video data to the two distribution cards. And a CPU card that selects the first distribution card of the two distribution cards to be distributed to the network. When the first distribution card selected by the CPU card and distributing the video data to the network fails, One delivery card is
Notify the CPU card of the failure and information indicating to what extent the video data was normally delivered to the network, and
The CPU card that received the notification switches the distribution card that distributes the video data to the network to the second distribution card,
Since the distribution is controlled to start from the video data next to the normally distributed video data, the defective distribution card can be switched in a short time, and the loss of the video data can be prevented.

Further, one of the two distribution cards is configured to select one of them and distribute the video data to the network and to detect its own failure, and a video card for supplying the video data to the two distribution cards. And a transmission management common table having a CPU card that selects the first distribution card of the two distribution cards to be distributed to the network, failure information of the two distribution cards, and information about how normally the video data is distributed to the network. When the first distribution card, which is selected by the CPU card and is distributing video data to the network, has a failure,
The first distribution card writes its own failure information in the transmission management common table, and based on the transmission management common table, the second distribution card that has not failed is next to the video data that is normally distributed. Since the distribution is performed from, the distribution cards can be switched at high speed without the intervention of the CPU card, and the loss of the video data can be prevented.

Further, one of the two distribution cards configured to distribute the video data to the network by selecting one of them, the video card for supplying the video data to the two distribution cards, and the two distribution cards A CPU card for selecting the first distribution card to be distributed to the internal network, a live data common table having live data written by the two distribution cards and information on how well the video data is normally distributed to the network. When the failure of the first distribution card that is selected by and is being distributed to the network is determined by the live data in the live data common table, the video data that was normally distributed by the second distribution card that has not failed is Since it is distributed from the next video data, it is high speed without the intervention of CPU card. Delivery card switching can be performed, it is possible to prevent loss of video data.

Furthermore, any one of the plurality of distribution cards configured to distribute the video data to the network and detect the failure of itself, and to distribute the plurality of distribution cards to the network. The CPU card includes a CPU card having a transmission data buffer for selecting one distribution card and storing the video data distributed by the first distribution card, and a video card for supplying the video data to the transmission buffer of the CPU card. When the first distribution card, which is selected by, and is distributing video data to the network, fails, the first distribution card notifies the CPU card of the failure, and the notified CPU card notifies the network of the video data. Switch the delivery card that delivers the It detects whether the video data has been normally distributed to the network, and controls to distribute from the next video data of the normally distributed video data, so it is possible to switch the defective distribution card in a short time. It is possible to prevent loss of video data.

[Brief description of drawings]

FIG. 1 is a diagram showing a system configuration of a control system device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing initialization of an application of a CPU card of the control system device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing the contents of a memory of a distribution card of the control system device according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing an application process when a distribution card of the CPU card of the control system device according to the first embodiment of the present invention is abnormal.

FIG. 5 is a flowchart showing a video card switching process of the control system device according to the first embodiment of the present invention.

FIG. 6 is a diagram showing a system configuration of a control system device according to a second embodiment of the present invention.

FIG. 7 is a diagram showing the contents of a shared memory of a control system device according to a second embodiment of the present invention.

FIG. 8 is a diagram showing a system configuration of a control system device according to a third embodiment of the present invention.

FIG. 9 is a diagram showing a system configuration of a control system device according to a fourth embodiment of the present invention.

FIG. 10 is a flowchart showing application processing when a distribution card of a CPU card of a control system device according to a fourth embodiment of the present invention is abnormal.

FIG. 11 is a diagram showing a system configuration of a control system device according to a fifth embodiment of the present invention.

FIG. 12 is a diagram showing a transmission management common table of a control system device according to a fifth embodiment of the present invention.

FIG. 13 is a diagram showing a system configuration of a control system device according to a sixth embodiment of the present invention.

FIG. 14 is a diagram showing a live data common table of a control system device according to a sixth embodiment of the present invention.

FIG. 15 is a diagram showing a system configuration of a control system device according to a seventh embodiment of the present invention.

FIG. 16 is a diagram showing the contents of a transmission data buffer of a control system device according to a seventh embodiment of the present invention.

[Explanation of symbols] 1 CPU card, 2 video cards, 3 distribution cards,
4 Transmission buffer accumulation function, 5 Normal transmission judgment function, 6
Shared memory, 7 transmission management common table, 8 live data common table, 9 transmission data buffer.

Claims (7)

[Claims] 1. A plurality of distribution cards configured to select one of them and distribute the video data to the network, and to detect a failure of itself, first of the plurality of distribution cards distributing to the network. A CPU card for selecting the distribution card, the video data supplied to the first distribution card selected by the CPU card, and a transmission buffer storage function for storing the video data supplied to the first distribution card, The first distribution card is provided with a video card having a normal transmission determination function of storing how much video data is normally distributed to the network by one distribution card, and is selected by the CPU card to distribute the video data to the network. When the delivery card fails, the first delivery card is the CPU
Upon notifying the card of the failure, the CPU card that received the notification switches the distribution card that distributes the video data to the network to the second distribution card, and based on the information of the transmission buffer accumulation function and the normal transmission determination function. A control system device, characterized in that control is performed so that the video data is delivered from the next video data after the normally delivered video data. 2. A plurality of distribution cards configured to select one of them and distribute the video data to the network, and to detect the failure of itself, the first distribution card of the plurality of distribution cards to the network. A shared memory having information for selecting a distribution card, and a video card for supplying video data to a first distribution card to be distributed to the network based on the information in the shared memory, selected by the information in the shared memory, and When the first distribution card that is distributing video data to the network fails,
The first distribution card writes its own failure information in the shared memory, and the video card supplies video data to the second distribution card according to the failure information of the first distribution card in the shared memory. A control system device characterized by the above. 3. The video card stores a transmission buffer accumulating function for accumulating the video data supplied to the first distribution card, and a normal memory storing up to which video data is normally distributed to the network by the first distribution card. The control system device according to claim 2, further comprising a transmission determination function. 4. Two distribution cards, one of which is selected to distribute the video data to the network and detect its own failure, and a video card which supplies the video data to the two distribution cards. A CPU card for selecting a first distribution card to be distributed to the network from the two distribution cards is provided, and the first distribution card selected by the CPU card and distributing the video data to the network fails. The first distribution card notifies the CPU card of the failure and information indicating to what extent the video data has been normally distributed to the network, and the CPU card receiving the notification,
A control system device, characterized in that a distribution card that distributes video data to a network is switched to a second distribution card, and control is performed so that distribution is started from video data that follows the normally distributed video data. 5. Two distribution cards, one of which is selected to distribute the video data to a network and detect its own failure, and a video card which supplies the video data to the two distribution cards. A transmission management common having a CPU card for selecting the first distribution card to be distributed to the network among the two distribution cards, failure information of the two distribution cards, and information on how correctly the video data is distributed to the network. When a first distribution card that has a table and is selected by the CPU card and is distributing video data to the network fails, the first distribution card writes its own failure information in the transmission management common table. , Based on the above transmission management common table, normal by the second distribution card that has not failed The control system device is characterized in that the video data is distributed from the video data next to the video data distributed to. 6. Two distribution cards configured to distribute video data to a network by selecting one of them, a video card for supplying video data to the two distribution cards, and one of the two distribution cards. A CPU card for selecting the first distribution card to be distributed to the network,
A first distribution which is provided with a live data common table having live data written by the two distribution cards and information on how normally the video data is distributed to the network, selected by the CPU card and being distributed to the network. When a failure of the card is determined by the live data of the live data common table, the second delivery card that has not failed delivers from the video data next to the normally delivered video data. Control system equipment. 7. A plurality of distribution cards configured to select one of them and distribute the video data to the network and to detect a failure of itself, the first of the plurality of distribution cards distributing to the network. C having a transmission data buffer which stores the video data distributed by the first distribution card while selecting the distribution card
A PU card and a video card for supplying video data to a transmission buffer of the CPU card are provided, and when the first distribution card selected by the CPU card and delivering the video data to the network fails, the first distribution is performed. The card notifies the CPU card of the failure and
Upon receiving the notification, the CPU card switches the distribution card that distributes the video data to the network to the second distribution card, and detects to what extent the video data has been normally distributed to the network from the first distribution card. A control system device, characterized in that control is performed so that the video data is delivered from the next video data after the normally delivered video data.