JP6896887B2 - Communication control device - Google Patents

Description

The present invention relates to a communication control device.

The communication control device controls the communication of the network including a plurality of nodes. For example, Patent Document 1 discloses a communication control device applied to a component mounting machine that mounts an electronic component on a circuit board to produce a board product. The communication control device constitutes a network with field devices such as a mounting head and a component supply device in the component mounting machine as nodes. The communication control device performs communication by transmitting and receiving a frame having a data field, for example, in accordance with a communication standard applied to network communication.

Japanese Unexamined Patent Publication No. 2016-151851

In a network that communicates using such a frame, a node that requests to join the network may be detected due to the addition of a device or the like. In such a case, the configuration process for updating the network configuration information is executed. However, if a data partition having a predetermined capacity is assigned to a data field for a node that is permitted to join, the communication efficiency may decrease. On the other hand, if the configuration process is not executed, the configuration information and the actual network configuration may not match, resulting in an error or communication stagnation.

An object of the present specification is to provide a communication control device capable of preventing a decrease in communication efficiency.

The present specification is a communication control device that communicates with a plurality of nodes by transmitting and receiving frames, and when a subscription request node that requests a subscription to a network composed of the plurality of nodes is detected, the subscription request is made. When the subscription determination unit that determines whether or not to join the node and the subscription determination unit deny the subscription of the subscription request node, writing to the frame is prohibited while allowing the received frame to pass through. A communication control device including a processing command unit for switching the subscription request node to a passive state is disclosed.

According to such a configuration, the join request node denied to join the network is switched from the active state to the passive state. As a result, the subscription request node is connected to the network, but only passes through the frame and does not write to the frame. As a result, it is possible to suppress the execution of unnecessary configuration processing after the subscription request node is detected, and to prevent the communication efficiency from being lowered due to the subscription of the node that does not require communication. Further, by switching to the passive state, the configuration information and the actual network configuration are substantially matched, and it is possible to prevent an error or communication stagnation.

It is a schematic diagram which shows the component mounting machine to which the communication control device in an embodiment is applied. It is a block diagram which shows the network of the component mounting machine. It is a figure which shows the format of the frame sent and received in a network. It is a figure which shows the configuration information and the subscription permission information. It is a flowchart which shows the 1st mode of the subscription request correspondence processing. It is a flowchart which shows the editing process of the subscription permission information. It is a flowchart which shows the 2nd mode of the subscription request correspondence processing.

1. 1. Embodiment Hereinafter, an embodiment in which the communication control device is embodied will be described with reference to the drawings. The communication control device controls the communication of the network including a plurality of nodes. In the present embodiment, an embodiment in which the communication control device is applied to a component mounting machine as a board-to-board work machine having a plurality of field devices will be illustrated.

1-1. Configuration of Component Mounting Machine 1 The component mounting machine 1 produces a substrate product by mounting a plurality of components on a circuit board (hereinafter, simply referred to as “board”) 90. As shown in FIG. 1, the component mounting machine 1 includes a board transfer device 10, a component supply device 20, a component transfer device 30, a component camera 41, a board camera 42, and a control device 60. The substrate transfer device 10 is composed of a belt conveyor or the like, and sequentially conveys the substrate 90 in the transfer direction.

The component supply device 20 supplies components to be mounted on the substrate 90. The component supply device 20 includes feeders 22 set in a plurality of slots 21. The feeder 22 feeds and moves a carrier tape containing a large number of parts, and supplies the parts so that they can be collected. Further, the parts supply device 20 supplies, for example, relatively large parts in a state of being arranged on a tray 25 placed on the pallet 24. The parts supply device 20 stores a plurality of pallets 24 in the storage shelf 23, and pulls out a predetermined pallet 24 according to the mounting process to supply the parts.

The component transfer device 30 transfers the components supplied by the component supply device 20 to a predetermined mounting position on the substrate 90 carried into the machine by the substrate transfer device 10. The component transfer device 30 moves the moving table 32 in the horizontal direction (X-axis direction and Y-axis direction) by the head drive device 31. The mounting head 33 is replaceably fixed to the moving table 32. The mounting head 33 supports the suction nozzle 34 so as to be movable in the Z-axis direction and rotatably around the θ-axis parallel to the Z-axis. The suction nozzle 34 sucks the parts by the supplied negative pressure air.

The component camera 41 and the substrate camera 42 are digital image pickup devices having an image pickup element such as CMOS. The component camera 41 and the board camera 42 take an image based on a control signal from the control device 60 connected communicably, and send the image data acquired by the image pickup to the control device 60. The component camera 41 is fixed to the base of the component mounting machine 1 so that the component held by the suction nozzle 34 can be imaged from below. The board camera 42 is provided on the moving table 32 so that the board 90 can be imaged from above.

The control device 60 is mainly composed of a CPU, various memories, and a control circuit. In the mounting process of mounting the component on the substrate 90, the control device 60 holds the component based on the result of the recognition process by the control program generated in advance, the information output from various sensors, the image processing, and the like. Controls the operation of 33. The detailed configuration of the control device 60 will be described later.

1-2. Network 70 of component mounting machine 1
The network 70 of the component mounting machine 1 will be described with reference to FIGS. 2 and 3. The control device 60 of the component mounting machine 1 transmits data to and from field devices such as the board transfer device 10, the component supply device 20, and the component transfer device 30. Here, the "field device" is a device that processes data output from various sensors such as encoders and devices such as relay devices to perform predetermined work in production. Each of the field devices includes a communication device for communicating with the control device 60 and other field devices.

The control device 60 is a communication control device in which communication devices of a plurality of field devices are a plurality of nodes 71-76, and frames 80 (see FIG. 3) are transmitted and received in communication with the plurality of nodes 71-76. The plurality of nodes 71-76 are connected to each other by a communication line 77 between adjacent nodes. Here, for example, industrial Ethernet that transmits various data by communication using a communication method compliant with Ethernet (registered trademark) can be applied to the network 70 of the component mounting machine 1.

Further, in the present embodiment, a master / slave system is adopted for the network 70 of the component mounting machine 1. The control device 60 is a master that communicates with each of the plurality of nodes 71-76 as slaves in the network 70 at regular intervals. The control device 60 comprehensively controls the transmission of the frame 80 transmitted and received to and from each slave as a master.

The control device 60 inputs various data included in the frame 80. The control device 60 determines the control content and the like in the mounting process based on various input data. As a result, the control device 60 commands, for example, the board transfer device 10 to carry the board 90, and the component transfer device 30 to command the component transfer device 30 to transfer the components to the board 90 according to the control program. Therefore, particularly during the execution of the mounting process that involves the transfer of parts as described above, it is necessary to perform an operation that reflects the current state acquired by various field devices, and real-time communication is required.

Here, the frame 80 used for communication has a header 81 and a data field 82 as shown in the upper part of FIG. When the communication in the network 70 conforms to Ethernet, the frame 80 has an FCS (Frame Check Sequence) (not shown) and constitutes an Ethernet frame. In that case, the header 81 is composed of fields such as a destination address and a source address, and the field length is fixed. The field length of the data field 82 is variable within a predetermined range or fixed at a predetermined value according to the communication standard applied to the network 70.

In the present embodiment, the data length of the data field 82 is fixed to a predetermined value as shown in the middle part of FIG. Further, the data field 82 is assigned a data partition R1-R6 having a specified capacity for each of the plurality of nodes 71-76. Each specified capacity of the data compartments R1-R6 is preset according to, for example, the required data communication capacity. Specifically, each specified capacity of the data compartments R1 to R6 is set based on the number of signals corresponding to the number of sensors and relays of the field device and the capacity required for transmission of the command command. The surplus area Rs is an area obtained by removing the data compartments R1-R6 from the data field 82.

As shown in the lower part of FIG. 3, the data partition in which the specified capacity is set as described above is composed of the telegram header, the data, and the working counter. This header contains the data length corresponding to the specified capacity and the address of the node. The working counter is a check bit for verification. The specified capacity of each node 71-76 is set between the minimum data capacity and the maximum data capacity so as to fit in the data field 82 having a fixed field length in the normal state.

Here, the above-mentioned "minimum data capacity" is the minimum capacity required for each of the plurality of nodes to send and receive the frame 80, and is used in the telegram header, the data corresponding to the above-mentioned number of signals, and the working counter. The capacity will be adjusted accordingly. Further, the above-mentioned "maximum data capacity" is a capacity that a node can transmit and receive in one frame 80, and is set for each node depending on the specifications of the communication device of the node. Specifically, in a predetermined communication standard, the capacity of the communication buffer of the communication device of the node corresponds to the maximum data capacity.

Further, the plurality of nodes 71-76 in the network 70 are configured so as to be able to switch between an active state and a passive state. Here, the "active state" of the node means a state in which the received frame 80 is allowed to pass and the writing to the frame 80 is allowed. That is, the active node is allowed to write data to the data partition assigned to itself in the data field 82 in the frame 80 when passing through the frame 80.

Further, the "passive state" of the node means a state in which writing to the frame 80 is prohibited while allowing the passage of the received frame 80. That is, a node in the passive state does not write to its own data partition regardless of whether or not a data partition having a specified capacity is allocated. However, the node in the passive state is not prohibited from reading data like the node in the active state. Therefore, the passive node is allowed to read the data of the data partition assigned to itself or another node in the data field 82 in the passed frame 80.

In the present embodiment, the plurality of field devices include the optional device 50 as shown in FIG. This is a field device that is selectively added to the standard specification configuration of the component mounting machine 1. The optional device 50 is provided to expand or change the function of the component mounting machine 1. More specifically, as the optional device 50, for example, a mounting head and a camera to be installed according to the type and mounting accuracy of the parts to be mounted in the mounting process, a supply device for supplying specific parts, and maintenance of mounting accuracy. A calibration device used for calibration for planning is assumed.

The optional device 50 as described above is not always installed at the time of shipment of the component mounting machine 1, and may be removed after shipment according to the mounting process. Further, in order to facilitate attachment / detachment of the optional device 50 and to allow various types to be installed, it is desirable that the communication device 52 used for communication with the control device 60 is connected to the network 70 in advance. As a result, when the main body 51 of the optional device 50 is installed in the component mounting machine 1 and connected to the communication device 52, the optional device 50 can be added.

Therefore, in the present embodiment, the network 70 is configured by using the communication device 52 of the optional device 50 as one node 75 and connecting the respective nodes 71-76 with the communication line 77. As a result, the communication device 52 of the optional device 50 is connected to the communication devices of the plurality of field devices constituting the standard specification component mounting machine 1 by the communication lines 77 constituting the network 70, respectively.

According to such a configuration, the node 76 located closer to the terminal side of the network 70 than the node 75 can communicate with the node 74 on the control device 60 side only after the power of the node 75 is turned on. As the communication device 52 of the optional device 50, for example, a remote I / O having a terminal to which various types of devices can be connected, a device having a dedicated terminal for inputting / outputting control signals of a mounting head and a camera, and the like are assumed. Will be done.

1-3. Outline of the control device 60 As described above, the control device 60 transmits and receives frames 80 in communication with a plurality of nodes. In the network 70 that communicates using the frame 80, the control device 60 instructs each node to execute the configuration process so that the frame 80 can be transmitted and received by a plurality of nodes. By executing the configuration process, each node is assigned the data partition assigned to itself in the data field 82.

The configuration process is generally executed when the nodes are communicably connected to form the network 70. In addition, the configuration process is executed as necessary when a node requesting to join the network 70 (hereinafter, referred to as a “subscription request node”) is detected. When the configuration process is executed, the specified capacity of each data partition is appropriately set so that the total sum does not exceed the capacity (field length) of the data field 82 while ensuring the minimum data capacity for each node.

Here, even if the main body 51 is not connected, the communication device 52 of the optional device 50 requests to join the network 70 when the power is turned on if it is in the active state. When the configuration process is executed when the subscription request node is the communication device 52 to which the main body 51 is not connected, the active communication device 52 has a data field of the frame 80 as one node. A predetermined capacity of data partition is assigned to 82.

In other words, the communication device 52 is networked as an active node even though the optional device 50 is not added to the component mounting machine 1 as described above and the writing to the frame 80 is not actually performed. It will be in the state of joining 70. When the configuration process is executed so as to join such a node to the network 70, a data partition having a predetermined capacity is secured in the data field 82 having a limited data length, and the communication efficiency may decrease.

On the other hand, if the configuration process is not executed even though the subscription request node is detected, the configuration information indicating the configuration of the network 70 and the actual configuration of the network 70 do not match, resulting in an error or communication. There is a risk of stagnation. Therefore, the control device 60 of the present embodiment adopts a configuration in which the state of the subscription request node is switched according to the permission or rejection of subscription to the network 70 in order to prevent a decrease in communication efficiency.

1-4. Detailed configuration of the control device 60 As shown in FIG. 2, the control device 60 includes a storage unit 61, a joining determination unit 62, and a processing command unit 63. The storage unit 61 is composed of a hard disk, a flash memory, or the like. In addition to the control program, the storage unit 61 stores configuration information M1 and subscription permission information M2. The control program is information in which the mounting angle of the component and the component information are associated with the mounting position of the component.

The configuration information M1 is information indicating the configuration of the network 70 as described above. As shown in Tables 1 to 3 of FIG. 4, the configuration information M1 is the data capacity and the state (“Active” or “Active” of FIG. 4) of the data partition allocated to the frame 80 for each of the plurality of nodes 71-76. "Passive") is the associated information. The configuration information M1 is updated every time the configuration process is executed.

The subscription permission information M2 is information in which a plurality of nodes permitting subscription to the network 70 are registered in advance. The control device 60 appropriately edits the subscription permission information M2. In the present embodiment, when the control device 60 inputs the notification by the communication device 52 of the optional device 50, the control device 60 edits the subscription permission information M2 based on the notification. Further, the subscription permission information M2 can be edited by a worker or an administrator according to, for example, a schedule for adding an optional device 50.

The subscription determination unit 62 determines whether or not to allow the subscription request node to join when a subscription request node requesting to join the network 70 composed of the plurality of nodes 71-76 is detected. In the present embodiment, when the subscription request node is detected, the subscription determination unit 62 determines whether or not to allow the subscription to the network based on whether or not the subscription request node is included in the subscription permission information M2.

More specifically, when the power is turned on to each device of the network 70 and a subscription request is received from each of the plurality of nodes 71-76, the subscription determination unit 62 displays the subscription permission information shown in Table 1 of FIG. Based on M2, the participation of nodes 71-74, 76 is permitted, and the participation of node 75 is denied. Further, when the subscription permission information M2 is edited by the control device 60, the subscription determination unit 62 determines whether or not to join in the subsequent subscription permission information M2 based on the edited subscription permission information M2, and the network 70 of the subscription request node. Judge whether or not to join.

The processing command unit 63 switches between the active state and the passive state of the plurality of nodes 71-76 based on the determination result by the joining determination unit 62. That is, the processing command unit 63 switches the subscription request node to the passive state when the subscription of the subscription request node is denied by the subscription determination unit 62. More specifically, in the above example, the node 75 denied to join the network 70 is switched to the passive state in response to a command from the processing command unit 63, as shown in Table 2 of FIG.

Further, when the processing command unit 63 commands a part or all of the plurality of nodes 71-76 to switch the state, the processing command unit 63 commands the execution of the configuration process in order to update the configuration information M1. That is, when the subscription request node is permitted to join by the subscription determination unit 62 and the configuration information M1 indicating the configuration of the network 70 does not include the subscription request node, the processing command unit 63 includes the subscription request node. At 70, the execution of the configuration process is instructed so that communication by transmitting and receiving the frame 80 is possible.

As a result, for example, when the data partition in the frame 80 is assigned to the node switched from the active state to the passive state, the data capacity of the above data partition is set to 0 by the configuration process. On the other hand, when the data partition in frame 80 is not assigned to the active node permitted to join the network 70 (for example, the node 73 in Table 1 of FIG. 4), the minimum data capacity is determined by the configuration process. The above data partitions are allocated (“Vd03” in Table 2 of FIG. 4).

Here, the subscription determination unit 62 may deny subscription to the network 70 when the optional device 50 added by connecting the main body 51 to the communication device 52 is not included in the subscription permission information M2. .. In such a case, the processing command unit 63 switches the communication device 52 of the optional device 50 to the passive state and notifies the operator of the error.

1-5. Joining request handling process by the control device 60 The joining request handling process by the control device 60 will be described with reference to FIGS. 2 to 7. In the following, for the sake of simplicity, as shown in FIG. 2, the network 70 includes six field devices (board transfer device 10, parts supply device 20, parts transfer device 30) in addition to the control device 60. Etc.) communication device is connected. Further, the communication devices of the field devices are node 71, node 72, ..., Node 76 in the order in which the frame 80 (see FIG. 3) transmitted from the control device 60 is transmitted.

In the present embodiment, the communication in the network 70 passes through all the nodes 71-76 in which the frame 80 transmitted from the master control device 60 is a slave, and the frame 80 passes through all the nodes 71-76 again. The process of returning to the control device 60 is defined as one cycle. When passing through frame 80, the active node reads and writes data to and from the data partition assigned to itself in the data field 82.

That is, when communication in the network 70 is performed at a fixed cycle of, for example, 1 kHz, if all the nodes 71-76 are in the active state, the frame 80 sent from the control device 60 is on-the-fly in each node 71-76. The process of reading and writing data and returning it to the control device 60 is executed every 1 ms. When the subscription request node is detected, the control device 60 executes the subscription request response process as shown in FIGS. 5 and 7.

The subscription request by the node is, for example, when the node is physically connected to the network 70 by the communication line 77, or when the power of the node connected to the network 70 is turned on, the communication device 52 of the optional device 50. It is sent from the subscription request node when the main body 51 is connected to the network. Here, it is assumed that the component mounting machine 1 is composed of, for example, only standard field equipment.

At this time, as shown in Table 1 of FIG. 4, the subscription permission information M2 indicates that the communication device (nodes 71-74, 76) of the field device of the standard specification is a node permitted to join the network 70. ing. In the component mounting machine 1 having such a configuration, each node 71-76 is turned on and becomes an active state, and sends a subscription request to the control device 60, respectively. As a result, the control device 60 detects the subscription request node.

1-5-1. The first aspect of the subscription request handling process When the subscription request node is detected as described above, the subscription determination unit 62 determines whether or not to join the subscription request node to the network 70 as shown in FIG. 5 (step). 11 (hereinafter, "step" is referred to as "S")). In the present embodiment, the subscription determination unit 62 determines based on whether or not the subscription request node is included in the subscription permission information M2.

For example, when the subscription request node is node 75, as shown in Table 1 of FIG. 4, it is not included in the subscription permission information M2, and subscription to the network 70 is denied (S11: No). In this case, the processing command unit 63 switches the subscription request node (node 75) from the active state to the passive state (S12).

On the other hand, when the subscription permission information M2 includes the subscription request node, the subscription determination unit 62 permits the subscription of the subscription request node (S11: Yes). In this case, the processing command unit 63 determines whether or not the subscription request node is included in the current configuration information M1 (S13). More specifically, when the processing command unit 63 does not allocate a data partition equal to or larger than the minimum data capacity to the subscription request node in the configuration information M1 (node 73 in Table 1 of FIG. 4), the processing command unit 63 subscribes. It is determined that the request node is not included in the configuration information M1 (S13: No).

Subsequently, the processing command unit 63 commands each node 71-76 to execute the configuration process in order to update the configuration information M1 (S14). As a result, as shown in Table 2 of FIG. 4, a data partition having a predetermined data capacity Vd03 is assigned to the frame 80, and the node 73 is readable and writable in the network 70. Therefore, the network 70 can be constructed by the nodes that need to communicate. Note that the node 75 that has been switched to the passive state cannot allocate a data partition to the frame 80 even if it is instructed to execute the configuration process.

On the other hand, when the join request node has already assigned the data partition to the frame 80 in the configuration information M1 (nodes 71, 72, 74, 76 in Table 1 of FIG. 4), the processing command unit 63 requests the join. It is determined that the node is already included in the configuration information M1 (S13: Yes). In this case, since it is not necessary to update the configuration information M1, the processing command unit 63 omits the execution of the configuration processing. As a result, it is possible to suppress the execution of unnecessary configuration processing and reduce the processing load.

Further, after the network 70 and the frame 80 are constructed as described above, some field devices may be replaced or optional devices 50 may be added or removed due to the expansion or change of the functions of the component mounting machine 1. I have something to do. In order to cope with such a change in the network 70, the control device 60 edits the subscription permission information M2. In the present embodiment, the subscription permission information M2 is automatically edited by the control device 60 in addition to the manual editing by the operator or the like.

In the editing process, as shown in FIG. 6, when the field device is connected or disconnected, the control device 60 is notified according to the communication standard of the network 70 (S21). The control device 60 edits the subscription permission information M2 based on the input notification (S22). As a result, the control device 60 edits the subscription permission information M2 so as to allow the connected field device to join the network 70 and to detach the removed field device from the network 70.

The connection and disconnection of the field device includes the attachment / detachment of the main body 51 to / from the communication device 52 of the option device 50. Specifically, when the main body 51 of the option device 50 is connected to the communication device 52 as a connection of the field device, the communication device 52 (node 75) of the option device 50 connects the option device 50 to the control device 60. Notifies that the number has been added (S21) and requests to join the network 70.

Next, the control device 60 permits the addition of the node 75 to the network 70, as shown in Table 2 of FIG. 4, based on the notification from the communication device 52 (node 75) of the optional device 50. The information M2 is edited (S22). After that, when the subscription request handling process is executed again, the node 75, which is the subscription request node, is included in the subscription permission information M2, and therefore the subscription determination unit 62 permits the subscription to the network 70 (S11: Yes). ).

Further, as shown in Table 2 of FIG. 4, the node 75 is not assigned a data partition in the current configuration information M1 and is not included in the configuration information M1 (S13: No). Therefore, the processing command unit 63 commands the execution of the configuration processing (S14). As a result, the node 75 is allowed to allocate the data partition to the frame 80 (“Vd05” in Table 3 of FIG. 4) and write the data. As shown in Table 3 of FIG. 4, the configuration information M1 is updated, and the node 75 is in a state of joining the network 70.

According to such a configuration, the subscription permission information M2 is automatically edited when the optional device 50 is added (S22), so that the node subscription permission / rejection determination (S11) is determined according to the current state of the field device. )It can be performed. As a result, before the addition of the optional device 50, a communication error can be avoided even if the node 75, which is only connected on the communication path of the network 70 and does not require communication, is not subscribed as an active state. On the other hand, when the optional device 50 is added due to the addition of a function, for example, the configuration process is executed (S14), and the network 70 is appropriately constructed.

1-5-2. Second aspect of the subscription request processing process Here, regarding the editing of the subscription permission information M2, the automatic editing by the control device 60 as described above may be prohibited, and only the manual editing by the operator or the like may be permitted. .. That is, the subscription permission information M2 is not automatically edited depending on the connection and disconnection of the field device, but is edited by the operator according to the schedule of connection and disconnection of the field device.

Specifically, for example, when the optional device 50 is added, the operator inputs the identification information of the optional device 50 to be added in advance into the control device 60 and edits the subscription permission information M2. As a result, the control device 60 is in a state in which what kind of optional device 50 is to be added is registered. Further, as shown in Table 2 of FIG. 4, the subscription permission information M2 permits the option device 50 to join the communication device 52 (node 75) to the network 70.

After that, when the main body 51 of the option device 50 is connected to the communication device 52, the communication device 52 (node 75) of the option device 50 notifies the control device 60 that the option device 50 has been added. At the same time (S21), a request for joining the network 70 is made. As shown in FIG. 7, when the subscription request handling process is executed again, the node 75, which is the subscription request node, is included in the subscription permission information M2, and therefore the subscription determination unit 62 permits the subscription to the network 70. (S11: Yes). Subsequent processing (S13, S14) is the same as the first aspect of the subscription request response processing, and therefore detailed description thereof will be omitted.

Here, in the second aspect of the subscription request handling process, the subscription permission information M2 is only allowed to be manually edited by an operator or the like. Therefore, even if the subscription permission information M2 notifies the connection of the field device (including the addition of the optional device 50) for which subscription to the network 70 is prohibited, the subscription permission information M2 is not edited. Further, when an unscheduled optional device 50 is added, the subscription determination unit 62 denies the subscription of the optional device 50 to the network 70 of the communication device 52 (subscription request node) (S11: No).

In this case, the processing command unit 63 switches the subscription request node from the current state to the passive state (S12), and notifies the operator of an error (S15). According to such a configuration, when the optional device 50 is added, it is determined whether or not the optional device 50 is a field device scheduled to be added (S11). In other words, the correctness of the added optional device 50 is determined.

As a result, only field devices such as the optional device 50 scheduled to be added can join the network 70, so that it is possible to prevent the connection of field devices (additional optional devices) different from the planned one. Further, when an attempt is made to add an optional device 50 different from the schedule, an error is notified (S15), so that the operator can be urged to confirm the optional device 50 or the like.

1-6. Effect of Configuration of Embodiment The control device 60 in the embodiment is a communication control device that communicates with a plurality of nodes 71-76 by transmitting and receiving a frame 80, and joins a network 70 composed of the plurality of nodes 71-76. When the subscription request node making a request is detected, the subscription determination unit 62 that determines whether or not the subscription request node can be subscribed, and the subscription determination unit 62 deny the subscription of the subscription request node (S11: No). A processing command unit 63 for switching the join request node to a passive state in which writing to the frame 80 is prohibited while allowing the received frame 80 to pass through is provided.

According to such a configuration, the join request node denied to join the network 70 is switched from the active state to the passive state. As a result, the subscription request node is connected to the network 70, but only passes through the frame 80 and does not write to the frame 80. As a result, it is possible to suppress the execution of unnecessary configuration processing after the subscription request node is detected, and to prevent the communication efficiency from being lowered due to the subscription of the node that does not require communication. Further, by switching to the passive state, the configuration information M1 and the actual configuration of the network 70 are substantially matched, and it is possible to prevent an error or communication stagnation.

In the present embodiment, the embodiment in which the subscription request node is the communication device 52 of the optional device 50 is illustrated. According to such a configuration, the component mounting machine 1 can be configured with the communication device 52 of the optional device 50 connected to the network 70. Here, if a communication device of an optional device is added after the network is constructed, the configuration information and the actual network configuration may not match and a communication error may occur.

Therefore, in the past, the communication device of the optional device was activated (allocated a data partition) or the communication device was physically removed from the communication line of the network even though communication was unnecessary before the addition of the optional device. Some measures were taken. However, if the communication device of the optional device before expansion is activated, the communication efficiency may be lowered. In addition, when physically removing the communication device, there are restrictions on the positional relationship with the standard field equipment, for example, it is necessary to place it at the end of the network in order to prevent the influence on communication while making it removable. May occur.

On the other hand, as described above, the configuration in which the communication device is in a passive state while being connected to the network 70 prevents a decrease in communication efficiency and is not restricted by the positional relationship with other field devices. Nodes) can be placed. As a result, it is possible to improve the degree of freedom regarding the expansion position of the optional device 50 and the arrangement of other field devices.

Further, in the present embodiment, the communication device 52 (node 75) of the optional device 50 configures the network 70 in the communication devices (node 74 and node 76) of a plurality of field devices constituting the standard specification component mounting machine 1. They are connected by communication lines 77.

According to such a configuration, the node 76 located on the terminal side of the network 70 cannot communicate with the control device 60 unless the communication device 52 of the optional device 50 passes through the frame 80. Therefore, conventionally, before the addition of the optional device 50, the communication device 52 of the optional device 50 is removed and the node 74 and the node 76 are connected by a communication line, or the node 75 is in the active state even though there is no writing. Needed to be.

On the other hand, by switching the communication device 52 (node 75) of the optional device 50 before expansion to the passive state, unnecessary work such as removing the communication device 52 can be omitted, and deterioration of communication efficiency can be prevented. Further, by connecting the communication device 52 to the network 70 before adding the optional device 50, the connection step when adding the optional device 50 can be omitted, and the work efficiency associated with the addition of the optional device 50 can be improved.

Further, in the present embodiment, the control device 60 is a master that communicates with each of the plurality of nodes 71-76 as slaves in the network 70 at regular intervals.
According to such a configuration, the control device 60 conforms to the communication standard of the master-slave system, and can collectively control each node as a slave. Each of the slaves communicates according to the command of the master and executes the configuration process as necessary. In such a network 70, it is particularly useful to determine whether the node should be activated or passive each time a join request node is detected.

Further, in the communication in the network 70, a process in which the frame 80 transmitted from the master passes through all the slaves and the frame 80 passes through all the slaves again and is returned to the master is set as one cycle.
According to such a configuration, real-time communication is ensured by executing one cycle of communication in the network 70 at a fixed cycle. In such a communication standard, since the capacity of the data field 82 is limited in order to realize a predetermined frequency, it is appropriate to permit the node to join the node with a change in the ratio of each data partition in the data field 82. Judgment is particularly useful because it makes effective use of the band.

Further, in the active state in which writing to the frame 80 is permitted, the slave reads / writes data to / from the data partition assigned to itself in the data field 82 in the frame 80 when passing through the frame 80.
According to such a configuration, the slave performs I / O processing on the frame 80 on the fly. According to such a communication standard, the frequency of communication can be increased, and the real-time property of communication can be improved. On the other hand, in such a communication standard, since the capacity of the data field 82 is limited, permitting the subscription of unnecessary nodes may reduce the bandwidth utilization and the communication efficiency. Therefore, it is particularly useful to determine the permission / rejection of the subscription request node.

Further, in the present embodiment, the control device 60 is configured to be applied to the component mounting machine 1 which is a board working machine. In the component mounting machine 1, commands to field equipment such as the substrate transfer device 10 are periodically required, and the responsiveness from the field equipment may affect the production efficiency. Further, in the component supply device 20, it is necessary to change the supply form (feeder 22, tray 25, etc.) according to the type of component mounted on the substrate 90.

Further, in the component transfer device 30, it is necessary to change the mounting form (mounting head 33 and suction nozzle 34) according to the type of the component mounted on the substrate 90 and the like. Therefore, the control device 60 is required to have communication control capable of supporting a network 70 composed of field devices corresponding to various mounting processes and preventing a decrease in communication efficiency. Therefore, it is particularly useful to apply the configuration illustrated in the embodiment to such a component mounting machine 1.

2. Modifications of the Embodiment 2-1. Regarding the subscription request processing In the embodiment, the control device 60 has a configuration in which the configuration information M1 and the subscription permission information M2 are individually provided. On the other hand, the configuration information M1 may be used as the subscription permission information M2 to execute the subscription request response process. In such a configuration, the subscription determination unit 62 uses the configuration information M1 defined by the last executed configuration process as the subscription permission information M2, and determines whether or not to join the node (S11). Then, the subscription determination unit 62 does not allow the subscription request node that is not included in the configuration information M1 to join.

As a result, for example, when the power of the component mounting machine 1 is turned on, the control device 60 maintains the node included in the configuration information M1 in the active state and switches the node not included in the configuration information M1 to the passive state ( S12). Therefore, when the component mounting machine 1 is started, the execution of the configuration process is omitted, and the processing load until the network 70 becomes communicable is reduced. In the above configuration, when the optional device 50 is planned to be added or the field device is to be removed, the administrator edits the configuration information M1 or forcibly executes the configuration process. It can be dealt with by instructing.

2-2. Communication Standards for Network 70 In the embodiment, the communication standard applied to network 70 is assumed to be Ethernet. Then, the control device 60 is assumed to be a master that communicates with the slave at a fixed cycle in the network 70 in which the master-slave method is adopted. On the other hand, if the control device 60 is a network 70 that transmits / receives a frame having a data field 82 to which a data partition having a specified capacity is assigned to each of a plurality of nodes, various communication standards corresponding to the network 70 and various communication standards A communication method can be applied.

2-3. Application of the control device 60 In the embodiment, the control device 60 is applied to the network 70 of the component mounting machine 1. The node with which the control device 60 (master) communicates is assumed to be a communication device (slave) of a field device such as the board transfer device 10. On the other hand, the control device 60 can be applied to the network 70 having a plurality of nodes. Even in such a configuration, the same effect as that of the embodiment is obtained.

Further, in the embodiment, the board-to-board working machine is configured to be a component mounting machine 1. On the other hand, the control device 60 can be applied to a board-to-board work machine other than the component mounting machine 1 as long as it is a board-to-board work machine having a plurality of field devices as a plurality of nodes. Specifically, the board-to-board working machine may be a solder printing machine constituting a production line together with the component mounting machine 1, and an inspection device for inspecting a circuit board on which components are mounted. Further, the control device 60 can be applied to a network including these anti-board work machines and a host computer, and a network of devices that perform various operations other than the anti-board work machine.

1: Parts mounting machine (working machine for board), 50: Optional equipment, 51: Main unit, 52: Communication device, 60: Control device (communication control device, master), 61: Storage unit, 62: Join judgment unit, 63: Processing command unit, 70: Network, 71-76: Node (communication device, slave), 77: Communication line, 80: Frame, 81: Header, 82: Data field, R1-R6: Data partition, Rs: Surplus Region, 90: Substrate

Claims (11)

A communication control device that communicates with multiple nodes by sending and receiving frames.
When a subscription request node that makes a subscription request to a network composed of the plurality of nodes is detected, a subscription determination unit that determines whether or not to allow the subscription of the subscription request node is detected.
When the subscription of the subscription request node is denied by the subscription determination unit, a processing command unit that switches the subscription request node to a passive state in which writing to the frame is prohibited while allowing the received frame to pass through. ,
A communication control device comprising. The processing command unit includes the subscription request node when the subscription determination unit permits the subscription of the subscription request node and the configuration information indicating the network configuration does not include the subscription request node. The communication control device according to claim 1, which commands the execution of a configuration process so that communication by transmitting and receiving the frame is possible in the network. When the subscription request node is detected, the subscription determination unit determines whether or not the subscription request node is included in the subscription permission information in which the plurality of nodes permitting to join the network are registered in advance. The communication control device according to claim 1 or 2, which determines whether or not to join the network based on the above. The communication control device is applied to the network of a board working machine that produces a board product by working on the plurality of field devices with the communication devices of the plurality of field devices as the plurality of nodes.
The plurality of field devices include optional devices that are selectively added to the standard specification configuration of the board-to-board work machine.
The communication control device according to claim 3, wherein the subscription request node is the communication device of the optional device. When the main body of the optional device is connected to the communication device, the communication device of the optional device notifies the communication control device that the optional device has been added, and notifies the network. Make a subscription request and
The communication control device edits the subscription permission information based on the notification from the communication device of the optional device.
The communication control device according to claim 4, wherein the subscription determination unit determines whether or not the subscription request node can subscribe to the network based on the edited subscription permission information. When the main body of the optional device is connected to the communication device, the communication device of the optional device notifies the communication control device that the optional device has been added, and notifies the network. Make a subscription request and
The subscription permission information is edited according to the schedule for adding the optional equipment, and is edited.
The communication control device according to claim 4, wherein the subscription determination unit determines whether or not the subscription request node can subscribe to the network based on the edited subscription permission information. When the added optional device is not included in the subscription permission information and the subscription to the network is denied, the processing command unit switches the communication device of the optional device to the passive state and works. The communication control device according to claim 6, which notifies a person of an error. The communication device of the optional device is connected to the communication device of the plurality of field devices constituting the board-to-board working machine of the standard specification by a communication line constituting the network, respectively, according to claim 4-7. The communication control device according to any one of the items. The communication control device according to any one of claims 1-8, wherein the communication control device is a master that communicates with each of the plurality of nodes as slaves in the network at regular intervals. A claim that communication in the network includes a process in which the frame transmitted from the master passes through all the slaves and the frame passes through all the slaves again and is returned to the master. 9. The communication control device according to 9. The tenth aspect of the present invention, wherein the slave reads and writes data to a data partition assigned to itself among the data fields in the frame when passing through the frame in an active state in which writing to the frame is permitted. Communication control device.

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