WO2019123524A1

WO2019123524A1 - Communication control device

Info

Publication number: WO2019123524A1
Application number: PCT/JP2017/045410
Authority: WO
Inventors: 陽祐寺西
Original assignee: 株式会社Ｆｕｊｉ
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2019-06-27
Also published as: JPWO2019123524A1; JP6896887B2

Abstract

This communication control device communicates with a plurality of nodes by transmitting and receiving frames. This communication control device is provided with: a participation determination unit which, upon detection of a participation requesting node that is requesting to participate in a network comprising the plurality of nodes, determines whether or not to permit the participation of the participation requesting node; and a processing command unit which, if the participation determination unit denies the participation of the participation requesting node, switches the participation requesting node to a passive state in which the participation requesting node is prohibited from writing to received frames, which are allowed to pass through the participation requesting node.

Description

Communication control unit

The present invention relates to a communication control device.

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

JP, 2016-151851, A

In a network performing communication using such a frame, there may be a case where a node requesting to join the network is detected along with the addition of a device. In such a case, configuration processing for updating network configuration information is performed. However, when a data partition of a predetermined capacity is allocated to a data field to a node that has been permitted to join, there is a risk that communication efficiency may be reduced. On the other hand, if the configuration process is not performed, there is a possibility that an error may occur or communication may stagnate because the configuration information and the actual network configuration do not match.

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

The present specification is a communication control apparatus that communicates with a plurality of nodes by transmitting and receiving a frame, and the join request node is requested when a join request node making a join request to a network configured by the plurality of nodes is detected. A join determination unit that determines whether a node is allowed to join, and when the join determination unit denies the join of the join request node, writing to the frame is prohibited while allowing passage of the received frame. A communication control apparatus comprising: a processing command unit for switching the joining request node to a passive state.

According to such a configuration, the joining request node denied to join the network is switched from the active state to the passive state. As a result, the joining request node is connected to the network but only passes the frame but does not write the frame. As a result, after the join request node is detected, the execution of unnecessary configuration processing is suppressed, and a decrease in communication efficiency due to the join of a node not requiring communication can be prevented. Further, by switching to the passive state, the configuration information and the actual configuration of the network substantially match, and it is possible to prevent an error or stagnation of communication.

It is a schematic diagram which shows the components mounting machine to which the communication control apparatus in embodiment was applied. It is a block diagram showing a network of a component mounting machine. It is a figure which shows the format of the frame transmitted / received in a network. It is a figure which shows structure information and subscription permission information. It is a flowchart which shows the 1st aspect of a joining request corresponding | compatible process. It is a flow chart which shows edit processing of subscription permission information. It is a flowchart which shows the 2nd aspect of a joining request corresponding | compatible process.

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

1-1. Configuration of Component Mounting Machine 1 The component mounting machine 1 mounts a plurality of components on a circuit board (hereinafter simply referred to as a “substrate”) 90 to produce a substrate product. As illustrated in FIG. 1, the component placement machine 1 includes a substrate transfer device 10, a component supply device 20, a component transfer device 30, a component camera 41, a substrate camera 42, and a control device 60. The substrate transfer apparatus 10 is configured by a belt conveyor or the like, and sequentially transfers 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 a feeder 22 set in a plurality of slots 21. The feeder 22 feeds and moves the carrier tape in which a large number of parts are stored, and supplies the parts so as to be able to be collected. Further, the component supply device 20 supplies, for example, relatively large components in a state where they are arranged on the tray 25 placed on the pallet 24. The component supply device 20 stores a plurality of pallets 24 in the storage rack 23 and pulls out a predetermined pallet 24 according to the mounting process to supply components.

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 device by the substrate transfer device 10. The component transfer device 30 causes the head driving device 31 to move the movable table 32 in the horizontal direction (X-axis direction and Y-axis direction). 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 to be rotatable around the θ-axis parallel to the Z-axis. The suction nozzle 34 sucks components by the negative pressure air supplied.

The component camera 41 and the substrate camera 42 are digital imaging devices having imaging devices such as CMOS. The component camera 41 and the substrate camera 42 perform imaging based on a control signal from the control device 60 connected communicably, and send out the image data acquired by the imaging 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 substrate camera 42 is provided on the moving stand 32 so that the substrate 90 can be imaged from above.

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

1-2. Network 70 of the 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 placement machine 1 performs data transmission with field devices such as the substrate 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 devices such as various sensors such as an encoder and a relay device and performs a predetermined operation in production. Each of the field devices comprises a communication device for communicating with controller 60 and other field devices.

The control device 60 is a communication control device that uses a plurality of communication devices of field devices as a plurality of nodes 71-76, and transmits and receives a frame 80 (see FIG. 3) in communication with the plurality of nodes 71-76. The plurality of nodes 71 to 76 are connected by communication lines 77 between adjacent nodes. Here, as the network 70 of the component mounting device 1, for example, an industrial Ethernet that performs various data transmissions by communication using a communication method based on Ethernet (registered trademark) may be applied.

Further, in the present embodiment, a master / slave system is adopted for the network 70 of the component mounting device 1. The control device 60 is a master that communicates with each of the plurality of nodes 71 to 76 as slaves in the network 70 in a fixed cycle. The control device 60 centrally controls the transmission of the frame 80 transmitted to and received 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 the input various data. Thus, the control device 60 instructs, for example, the substrate transfer device 10 to load the substrate 90, and instructs the component transfer device 30 to transfer components onto the substrate 90 according to the control program. Therefore, particularly during execution of the mounting process involving the transfer of parts as described above, an operation reflecting the current state acquired by various field devices is required, and real time property is required for communication.

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 constructs an Ethernet frame. In that case, the header 81 is composed of fields such as a destination address and a sender address, and the field length is fixed. The field length of the data field 82 is variable within a predetermined range or fixed to 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, in the data field 82, data partitions R1-R6 of a prescribed capacity are allocated to each of the plurality of nodes 71-76. Each prescribed capacity of the data section R1-R6 is preset, for example, according to the required data communication capacity. Specifically, the respective prescribed capacities of the data sections R1-R6 are 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. The surplus area Rs is an area obtained by removing the data section R1-R6 from the data field 82.

The data section in which the specified capacity is set as described above is configured by a telegram header, data, and a working counter as shown in the lower part of FIG. This header includes the data length corresponding to the specified capacity and the address of the node. The working counter is a check bit for verification. The prescribed capacity of each of the nodes 71 to 76 is set between the minimum data capacity and the maximum data capacity so as to fall within the data field 82 consisting of a fixed field length under normal conditions.

Here, the above “minimum data capacity” is the minimum capacity required for each of a plurality of nodes to transmit and receive the frame 80, and is used as the telegram header, data according to the number of signals described above, and the working counter. It becomes capacity according to. Further, the above “maximum data capacity” is a capacity that allows a node to transmit and receive by 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 possessed by the communication device of the node corresponds to the maximum data capacity.

Further, the plurality of nodes 71 to 76 in the network 70 are configured to be switchable 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 node in the active state is allowed to write data in the data section allocated to itself of the data field 82 in the frame 80 when passing the frame 80.

Further, the “passive state” of the node means a state in which writing to the frame 80 is prohibited while allowing 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 of a prescribed capacity is allocated. However, nodes in the passive state are not prohibited from reading data as in the nodes in the active state. Therefore, the node in the passive state is allowed to read the data of the data section assigned to itself or another node among the data fields 82 in the passed frame 80.

In the present embodiment, the plurality of field devices include optional devices 50 as shown in FIG. This is a field device that is selectively added to the configuration of the standard specification of the component mounting device 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 or a camera installed according to the type and mounting accuracy of a component to be processed in the mounting process, a supply device for supplying a specific component, maintenance of mounting accuracy A calibration device used for calibration for the purpose of illustration is assumed.

The optional device 50 as described above is not necessarily installed at the time of shipment of the component mounting device 1, and may be removed after shipping in accordance with the mounting process. In addition, it is desirable that the communication device 52 used for communication with the control device 60 be previously connected to the network 70 in order to facilitate attachment and detachment and enable installation of various types of optional devices 50. Thus, when the main body 51 of the optional device 50 is installed in the component mounting device 1 and connected to the communication device 52, the optional device 50 can be expanded.

Therefore, in the present embodiment, the network 70 is configured by connecting the communication device 52 of the optional device 50 to one node 75 and connecting the respective nodes 71 to 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 component mounting device 1 of the standard specification through the communication lines 77 constituting the network 70.

According to such a configuration, the node 76 located on the terminal side of the network 70 rather 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 terminals to which various types of devices can be connected, a device having a dedicated terminal for inputting / outputting a control signal of a mounting head or a camera, etc. are assumed. Be done.

1-3. Overview of Control Device 60 As described above, the control device 60 transmits and receives the frame 80 in communication with a plurality of nodes. In the network 70 performing communication using such a frame 80, the control device 60 instructs each node to execute configuration processing so that a plurality of nodes can transmit and receive the frame 80. By execution of the configuration process, each node is assigned a data segment of the data field 82 assigned to itself.

The configuration process is generally performed when the nodes 70 are communicably connected and the network 70 is constructed. In addition, the configuration process is executed as needed when a node (hereinafter referred to as a “join request node”) making a join request to the network 70 is detected. When the configuration process is executed, the prescribed capacity of each data section is appropriately set so that the sum does not exceed the capacity (field length) of the data field 82 while securing the minimum data capacity for each node.

Here, even when the main unit 51 is not connected, the communication device 52 of the optional device 50 makes a join request to the network 70 if the power is turned on if the communication device 52 is in the active state. As described above, in the case where the joining request node is the communication device 52 to which the main unit 51 is not connected, when the configuration processing is executed, the communication device 52 in the active state receives the data field of the frame 80 as one node. Data partitions of a predetermined capacity are allocated to 82.

In other words, the communication device 52 does not have the optional device 50 added to the component mounting machine 1 as described above, and does not actually write to the frame 80, but as a node in an active state It will be in the state of joining 70. When the configuration processing is performed to join such a node to the network 70, a data section having a predetermined capacity is secured in the data field 82 having a limited data length, which may lower the communication efficiency.

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

1-4. Detailed Configuration of 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 configured of a hard disk, a flash memory, and the like. In addition to the control program, the storage unit 61 stores configuration information M1, subscription permission information M2, and the like. The control program is information in which a component mounting angle and component information are associated with a component mounting position.

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

The subscription permission information M2 is information in which a plurality of nodes for permitting subscription to the network 70 are registered in advance. The control device 60 edits the subscription permission information M2 as appropriate. In the present embodiment, when the notification by the communication device 52 of the optional device 50 is input, 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 a manager, for example, according to a schedule for adding the optional device 50.

The subscription determination unit 62 determines whether or not to subscribe to the subscription request node when a subscription request node that requests a subscription to the network 70 configured by the plurality of nodes 71 to 76 is detected. In the present embodiment, when the joining request node is detected, the joining determination unit 62 determines whether to permit joining to the network based on whether or not the joining request information is included in the joining permission information M2.

More specifically, when each device of the network 70 is powered on and there is a joining request from each of the plurality of nodes 71 to 76, the joining determination unit 62 performs joining permission information shown in Table 1 of FIG. Based on M2, the nodes 71-74 and 76 are allowed to join, and the node 75 is denied to join. Further, when the subscription permission information M2 is edited by the control device 60, the subscription determination unit 62 determines whether or not there is a subsequent subscription permission information, based on the edited subscription permission information M2 according to the network 70 of the subscription request node. Determine whether or not to join.

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

Further, when the processing command unit 63 instructs part or all of the plurality of nodes 71 to 76 to switch the state, the processing command unit 63 instructs execution of the configuration processing to update the configuration information M1. That is, in the processing command unit 63, the network including the join request node when the join determination unit 62 permits the join of the join request node and the configuration information M1 indicating the configuration of the network 70 does not include the join request node. At 70, execution of the configuration processing is commanded to enable communication by transmission and reception of the frame 80.

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

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

1-5. Subscription Request Handling Process by Control Device 60 A subscription request handling process by the control device 60 will be described with reference to FIGS. In the following, in order to simplify the description, as shown in FIG. 2, the network 70 includes six field devices (the substrate transfer device 10, the component supply device 20, and the component transfer device 30) in addition to the control device 60. Etc.) are connected. The communication devices of the field devices are referred to as node 71, node 72,..., Node 76 in the order in which frames 80 (see FIG. 3) transmitted from control device 60 are transmitted.

In this embodiment, in the communication in the network 70, the frame 80 transmitted from the master control device 60 passes through all the nodes 71-76 serving as slaves, and the frame 80 passes through all the nodes 71-76 again. Then, the processing returned to the control device 60 is taken as one cycle. When passing through the frame 80, the active node reads and writes data to the data section of the data field 82 assigned to it.

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

Note that the joining 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 In the case where the main unit 51 is connected to the connection request node, it is sent out from the subscription request node. Here, it is assumed that the component mounting device 1 is configured only by, for example, a field device of standard specifications.

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

1-5-1. First aspect of join request handling processing If the join request node is detected as described above, as shown in FIG. 5, the join determination unit 62 determines whether or not to join the join request node to the network 70 (step 11 (hereinafter, "step" is described as "S")). In the present embodiment, the joining determination unit 62 determines based on whether or not the joining permission information M2 includes a joining request node.

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

On the other hand, when the joining request information is included in the joining permission information M2 by the joining judging unit 62, joining of the joining request node is permitted (S11: Yes). In this case, the process command unit 63 determines whether the joining request node is included in the current configuration information M1 (S13). More specifically, processing command unit 63 is configured to join the data if more than the minimum data capacity is allocated to frame 80 in join request node in configuration information M1 (node 73 in Table 1 of FIG. 4), It is determined that the request node is not included in the configuration information M1 (S13: No).

Subsequently, the process command unit 63 instructs each of the nodes 71 to 76 to execute the configuration process to update the configuration information M1 (S14). As a result, as shown in Table 2 of FIG. 4, the data partition of the predetermined data capacity Vd03 is allocated to the node 73 in the frame 80, and the node 73 joins the network 70 in a readable and writable manner. Thus, the network 70 can be constructed by nodes that need to communicate. The node 75 switched to the passive state can not assign a data partition to the frame 80 even if the execution of the configuration processing is instructed.

On the other hand, when the join request node has already been assigned a data partition to frame 80 in configuration information M1 (process command unit 63) (

node

71, 72, 74, 76 in Table 1 of FIG. 4), join request It is determined that the node is already included in the configuration information M1 (S13: Yes). In this case, since the configuration information M1 does not need to be updated, the processing command unit 63 omits the execution of the configuration processing. Thus, unnecessary execution of configuration processing can be suppressed, and processing load can be reduced.

In addition, after the network 70 and the frame 80 are constructed as described above, some field devices are replaced or optional devices 50 are added or removed as the function of the component mounting apparatus 1 is expanded or changed. There is something to do. In order to cope with such a change of 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 manual editing by a worker 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). Thereby, the control device 60 permits joining of the connected field device to the network 70, and edits the joining permission information M2 such that the removed field device is detached from the network 70.

The connection and removal of the field device described above includes the attachment and detachment of the main body 51 to the communication device 52 of the optional device 50. Specifically, when the main unit 51 of the optional device 50 is connected to the communication device 52 as a connection of a field device, the communication device 52 (node 75) of the optional device 50 transmits the optional device 50 to the control device 60. Is notified (S21), and a request for joining the network 70 is issued.

Next, based on the notification by the communication device 52 (node 75) of the optional device 50, the control device 60 permits the joining to allow the node 75 to join the network 70, as shown in Table 2 of FIG. The information M2 is edited (S22). Thereafter, when the joining request handling process is executed again, the joining request node node 75 is permitted to join the network 70 by the joining determination unit 62 because it is included in the joining permission information M2 (S11: Yes) ).

Furthermore, 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 process command unit 63 instructs execution of the configuration process (S14). This allows node 75 to be assigned a data partition to frame 80 ("Vd05" in Table 3 of FIG. 4) and to allow data to be written. 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, since the subscription permission information M2 is automatically edited when there is an addition of the optional device 50 (S22), it is determined whether or not to join the node according to the current state of the field device (S11). )It can be performed. As a result, it is possible to avoid a communication error without joining the node 75 which does not need communication as an active state, which is only connected on the communication path of the network 70 before adding the optional device 50. On the other hand, if there is an addition of the optional device 50, for example, due to the addition of a function, the configuration processing is executed (S14), and the network 70 is appropriately constructed.

1-5-2. Second mode of subscription request handling processing Here, for the editing of subscription permission information M2, the above-described automatic editing by the control device 60 may be prohibited, and only manual editing by a worker or the like may be permitted. . That is, the subscription permission information M2 is not automatically edited by the connection and removal of the field device, but is edited according to the worker's connection and removal schedule of the field device.

Specifically, for example, when adding an optional device 50, the operator inputs in advance identification information and the like of the optional device 50 to be added to the control device 60, and edits the subscription permission information M2. As a result, the control device 60 is registered with what optional devices 50 are to be added. Further, as shown in Table 2 of FIG. 4, the joining of the communication device 52 (node 75) of the optional device 50 to the network 70 is permitted in the subscription permission information M2.

Thereafter, when the main unit 51 of the optional device 50 is connected to the communication device 52, the communication device 52 (node 75) of the optional device 50 notifies the control device 60 that the optional 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 joining request handling process is executed again, the joining request node node 75 is permitted to join the network 70 by the joining determination unit 62 because it is included in the joining permission information M2. (S11: Yes). The subsequent processes (S13 and S14) are the same as the first aspect of the joining request handling process, and thus the detailed description will be omitted.

Here, in the second aspect of the subscription request handling process, the subscription authorization information M2 is only allowed to be manually edited by a worker or the like. Therefore, even if the connection (including the addition of the optional device 50) of a field device whose joining to the network 70 is prohibited is notified by the joining permission information M2, the joining permission information M2 is not edited. Also, when the optional device 50 not scheduled is added, the subscription determination unit 62 denies the subscription of the communication device 52 (subscribe request node) of the optional device 50 to the network 70 (S11: No).

In this case, the process command unit 63 switches the joining 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 the optional device 50 is a field device scheduled to be added (S11). In other words, it is determined whether the added optional device 50 is correct.

As a result, only field devices such as the option device 50 scheduled to be added can join the network 70, so that connection of field devices different from the schedule (addition of option devices) can be prevented. Further, when an option device 50 different from the schedule is to be added, an error is notified (S15), so that the operator can be prompted to check the option device 50 and the like.

1-6. Effects of the Configuration of the Embodiment The control device 60 in the embodiment is a communication control device that communicates with the plurality of nodes 71 to 76 by transmitting and receiving the frame 80, and joins the network 70 configured of the plurality of nodes 71 to 76. When a request for joining request node is detected, the joining determination unit 62 which determines permission or refusal of joining of the joining request node and the case where the joining determination unit 62 denies joining of the join request node (S11: No) And a processing command unit 63 for switching the joining request node to a passive state in which writing to the frame 80 is inhibited while permitting passage of the received frame 80.

According to such a configuration, a join request node denied to join the network 70 is switched from the active state to the passive state. As a result, the joining request node is connected to the network 70 but only passes the frame 80 and does not write to the frame 80. As a result, after the join request node is detected, the execution of unnecessary configuration processing is suppressed, and a decrease in communication efficiency due to the join of a node not requiring communication can be prevented. Further, by switching to the passive state, the configuration information M1 substantially matches the configuration of the actual network 70, and it is possible to prevent an error or stagnation of communication.

In the present embodiment, the subscription request node exemplifies the aspect of being the communication device 52 of the optional device 50. According to such a configuration, the component mounting device 1 can be configured in a state where the communication device 52 of the optional device 50 is connected to the network 70. Here, if a communication device of an optional device is added after the network is constructed, a configuration error may not match the actual configuration of the network, resulting in a communication error.

Therefore, conventionally, the communication device of the optional device is made active (data partition is allocated) even though communication is not necessary before adding the optional device, or the communication device is physically removed from the communication line of the network. Coping was done. However, when the communication device of the optional device before the expansion is activated, there is a risk that the communication efficiency may be reduced. In addition, when physically removing the communication device, for example, it is necessary to place the communication device at the end of the network in order to prevent the influence on the communication while making it removable, so that the positional relationship with the standard specification field device is restricted. It may occur.

On the other hand, as described above, the configuration to be in the passive state while being connected to the network 70 prevents a decrease in communication efficiency and prevents the communication device from being restricted by the positional relationship with other field devices. Nodes) can be arranged. As a result, it is possible to improve the degree of freedom of the additional 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 component mounting device 1 of standard specifications. Are respectively connected by communication lines 77.

According to such a configuration, the node 76 located at the terminal side of the network 70 can not communicate with the control device 60 unless the communication device 52 of the optional device 50 passes the frame 80. Therefore, conventionally, before adding 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 active even though there is no writing. I needed to

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 a decrease in communication efficiency can be prevented. Furthermore, by connecting the communication device 52 to the network 70 before adding the optional device 50, the connection process for adding the optional device 50 can be omitted, and the working efficiency associated with the adding 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 to 76 as a slave in the network 70 in a constant cycle.
According to such a configuration, the control device 60 can comprehensively control each node as a slave in accordance with the master-slave communication standard. Each of the slaves communicates according to the master's command and executes configuration processing as needed. In such a network 70, it is particularly useful to determine whether the node should be active or passive each time a join request node is detected.

Also, in the communication in the network 70, one frame is 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.
According to such a configuration, the communication of one cycle in the network 70 is executed at a constant cycle, and the real time property of the communication is secured. In such a communication standard, since the capacity of the data field 82 is limited in order to realize a predetermined frequency, the joining permission of the node accompanied by the change of the ratio of each data section in the data field 82 is appropriately set. Determining is effective because it makes effective use of the bandwidth.

In addition, in the active state in which writing to the frame 80 is permitted, the slave reads and writes data in a data section allocated to itself out of the data field 82 in the frame 80 when passing the frame 80.
According to such a configuration, the slave performs I / O processing on the fly on frame 80. According to such a communication standard, it is possible to increase the frequency of communication and to improve the real time property of communication. On the other hand, in such a communication standard, since the capacity of the data field 82 is limited, there is a risk that the availability of a band may be lowered and the communication efficiency may be lowered if the joining permission of an unnecessary node is permitted. Therefore, it is particularly useful to determine the permission 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-to-board work machine. In the component mounting device 1, a command to the field device such as the substrate transfer apparatus 10 is periodically required, and the response from the field device may affect the production efficiency. Further, in the component supply device 20, it is necessary to change the supply form (such as the feeder 22 and the tray 25) in accordance with the type of the component mounted on the substrate 90 and the like.

Further, in the component transfer device 30, it is necessary to change the mounting form (the mounting head 33 and the suction nozzle 34) in accordance with the type of the component to be mounted on the substrate 90 and the like. Therefore, the control device 60 is required to perform communication control that can correspond to the network 70 configured by field devices according to various mounting processes, and can prevent a decrease in communication efficiency. Therefore, applying the configuration exemplified in the embodiment to such a component mounting machine 1 is particularly useful.

2. Modification of Embodiment 2-1. Regarding Subscription Request Handling Processing In the embodiment, the control device 60 is configured to individually include the configuration information M1 and the subscription authorization information M2. On the other hand, the subscription request handling process may be executed with the configuration information M1 as the subscription authorization information M2. In such a configuration, the joining determination unit 62 uses the configuration information M1 defined by the configuration process last executed as the joining permission information M2 and performs permission determination of joining of the node (S11). Then, the joining determination unit 62 does not permit joining for the joining request node not included in the configuration information M1.

Thus, for example, when the component mounting machine 1 is powered on, the control device 60 maintains the nodes included in the configuration information M1 in the active state and switches the nodes not included in the configuration information M1 to the passive state S12). Therefore, at the time of activation of the component mounting device 1, the execution of the configuration processing is omitted, and the processing load until the network 70 becomes communicable is reduced. In the above configuration, when expansion of optional device 50 or removal of a field device is scheduled, the administrator edits configuration information M1 or forcibly executes configuration processing. It can respond by instructing.

2-2. Communication Standard of Network 70 In the embodiment, the communication standard applied to the network 70 is Ethernet. The control device 60 is a master that communicates with slaves in a fixed cycle in the network 70 in which the master-slave system is adopted. On the other hand, if the control device 60 is a network 70 that transmits and receives a frame having a data field 82 to which a data partition of a prescribed capacity is allocated for each of a plurality of nodes, various communication standards corresponding to the network 70 and A communication scheme can be applied.

2-3. Application of Control Device 60 In the embodiment, the control device 60 is applied to the network 70 of the component mounting device 1. A node with which the control device 60 (master) communicates is a communication device (slave) of a field device such as the substrate transfer device 10. On the other hand, the control device 60 can be applied to any network 70 having a plurality of nodes. Even in such a configuration, the same effects as those of the embodiment can be obtained.

In the embodiment, the substrate-to-substrate work machine is configured as the component mounting machine 1. On the other hand, the control device 60 can be applied to a work-to-board work machine other than the component mounting machine 1 as long as the work-to-board work machine has a plurality of field devices as a plurality of nodes. Specifically, the board-to-board working machine may be a solder printing machine that constitutes a production line together with the component mounting machine 1 or an inspection device that inspects a circuit board on which a component is mounted. Furthermore, the control device 60 can be applied to a network including the substrate-to-substrate work machine and the host computer, and a network of apparatuses performing various operations other than the substrate-to-board work machine.

1: Component mounting machine (substrate work machine), 50: Optional equipment, 51: Main unit, 52: Communication device, 60: Control device (Communication control device, master), 61: Storage unit, 62: Join determination 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 section Rs: surplus Area, 90: Substrate

Claims

A communication control apparatus that communicates with a plurality of nodes by transmitting and receiving a frame
A subscription determination unit that determines whether or not to subscribe to the subscription request node if a subscription request node that makes a subscription request to the network configured by the plurality of nodes is detected;
A processing command unit for switching the join request node to a passive state in which writing to the frame is inhibited while allowing passage of the received frame when the join determination unit denies the join of the request node; ,
A communication control apparatus comprising:
The processing command unit includes the joining request node when joining of the joining request node is permitted by the joining determination unit and the joining request node is not included in configuration information indicating the configuration of the network. The communication control apparatus according to claim 1, wherein execution of a configuration process is instructed to enable communication by transmission and reception of the frame in a network.
The joining determination unit determines whether the joining request information is included in joining permission information in which the plurality of nodes permitting joining to the network are registered in advance when the joining request node is detected. The communication control device according to claim 1 or 2, wherein the permission or rejection of joining to the network is determined based on the communication control device.
The communication control device is applied to the network of a substrate-to-board work machine, wherein communication devices of a plurality of field devices are used as the plurality of nodes, and substrate products are produced by the operations of the plurality of field devices.
The plurality of field devices include optional devices which are selectively added to the standard specification configuration of the work-to-board 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 unit 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 the communication device to the network Make a subscription request,
The communication control device edits the subscription permission information based on notification by the communication device of the optional device,
5. The communication control apparatus according to claim 4, wherein the joining determination unit determines whether or not the joining request node joins the network based on the edited joining permission information.
When the main unit 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 the communication device to the network Make a subscription request,
The subscription permission information is edited according to a schedule for adding the optional device,
5. The communication control apparatus according to claim 4, wherein the joining determination unit determines whether or not the joining request node joins the network based on the edited joining permission information.
The processing command unit switches the communication device of the optional device to the passive state when the added optional device is not included in the subscription permission information and the joining of the network is denied, and the processing command unit performs an operation The communication control apparatus according to claim 6, wherein an error is notified to a person.
The communication device according to claim 4, wherein said communication device of said optional device is connected to said communication device of said plurality of field devices constituting said work-to-board work equipment of standard specification by communication lines constituting said network. The communication control device according to any one of the above.
The communication control device according to any one of claims 1 to 8, wherein the communication control device is a master that communicates with each of the plurality of nodes as a slave in the network in a constant cycle.
In the communication in the network, one cycle is 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. The communication control device according to 9.
The slave according to claim 10, wherein, in an active state in which writing to the frame is permitted, when passing the frame, the slave reads and writes data in a data section allocated to itself among data fields in the frame. Communication control device.