WO2023100623A1

WO2023100623A1 - Termination setting device, termination setting method, and termination setting program

Info

Publication number: WO2023100623A1
Application number: PCT/JP2022/042118
Authority: WO
Inventors: まゆ美仲田
Original assignee: 住友重機械工業株式会社
Priority date: 2021-12-01
Filing date: 2022-11-11
Publication date: 2023-06-08
Also published as: TW202324004A

Abstract

A termination setting device 1 comprises slave nodes 4 connected in series to a master node 3 serving as a start terminal node. The master node 3 comprises a termination setting frame transmission unit 31 that transmits a termination setting frame which includes termination setting information for specifying a termination node among the slave nodes 4. The slave nodes 4 each comprise: a termination specification information confirmation unit 42 that confirms whether the host slave node is specified as the termination node by termination specification information included in a termination setting frame received from an adjacent previous-stage node; a termination setting unit 44 that, if the host slave node is designated as the termination node by the termination setting information, sets a communication path for sending back, to the previous-stage node, the frame received from the previous-stage node; and a termination setting frame re-transmission unit 43 that, if the host slave node is not designated as the termination node by the termination setting information, re-transmits the termination setting frame to an adjacent latter-stage slave node 4.

Description

Termination setting device, termination setting method, termination setting program

The present invention relates to a termination setting device and the like in a system comprising a master node and slave nodes.

Patent Document 1 discloses a home appliance that includes a master node and a plurality of slave nodes that are serially and ring-connected to the master node. Examples of slave nodes include sensors that measure various parameters of home appliances and actuators that drive various parts of home appliances. These slave nodes perform cooperative operations while communicating with the master node, so that the intended operation of the home appliance is realized.

JP-A-8-280078

Unlike home appliances such as those disclosed in Patent Document 1, in industrial systems used in industrial sites that produce and provide products and services, relatively large industrial devices that constitute master nodes and slave nodes are individually procured. , installation, connection, and setting are generally performed mainly manually at industrial sites. When slave nodes are connected in series and in a line with the master node as the starting node, it is necessary to set the slave node located at the end as the terminal node. In conventional industrial systems, the industrial equipment was set as a terminal node by switching a mechanical switch installed on the circuit board of the industrial equipment, but work efficiency was poor and human error could occur. rice field.

The present invention has been made in view of this situation, and its object is to provide a termination setting device or the like that can efficiently set termination nodes.

In order to solve the above problems, a termination setting device according to one aspect of the present invention includes a master node and one or more slave nodes connected in series with the master node as a starting node. The master node has a termination setting frame transmitter that transmits a termination setting frame including termination designation information designating a termination node in the slave node. A slave node has a termination designation information confirmation unit for confirming whether or not termination designation information contained in a termination setting frame received from an adjacent preceding node designates itself as a termination node, , the termination setting section sets a communication path that returns a frame received from a preceding node to the preceding node, and if the termination designation information does not designate itself as a termination node, the termination setting frame is sent to the adjacent subsequent node. a termination setting frame retransmitting unit for retransmitting to the slave node.

According to this aspect, the slave node located at the end can be efficiently set as the end node by the termination setting frame transmitted from the master node located at the start.

Another aspect of the present invention is a termination setting method. In this method, a termination setting frame including termination designation information designating a termination node in one or a plurality of slave nodes connected in series with a master node as a starting node is transmitted from the master node to an adjacent subsequent slave node. , a slave node that has received a termination setting frame from an adjacent preceding node sets a communication path for returning a frame received from the preceding node to the preceding node if the termination designation information designates itself as a terminal node; If the termination designation information does not designate itself as a termination node, it retransmits the termination setting frame to the adjacent subsequent slave node.

It should be noted that any combination of the above constituent elements, and any conversion of the expression of the present invention between methods, devices, systems, recording media, computer programs, etc. are also effective as embodiments of the present invention.

According to the present invention, terminal nodes can be set efficiently.

It is a functional block diagram of a termination setting device. 4 shows an example of a termination setting frame. 4 schematically shows a mode of termination setting by a termination setting unit; 4 is a flowchart of termination setting processing by a termination setting device; 1 is a perspective view showing the overall structure of a linear transfer system as an example of an industrial system; FIG. 1 shows the configuration of a printing apparatus as an example of an industrial system;

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the description or drawings, the same or equivalent constituent elements, members, and processes are denoted by the same reference numerals, and overlapping descriptions are omitted. The scales and shapes of the illustrated parts are set for convenience in order to facilitate the explanation, and should not be construed as limiting unless otherwise specified. The embodiments are illustrative and do not limit the scope of the invention in any way. Not all features or combinations of features described in the embodiments are essential to the invention.

FIG. 1 is a functional block diagram of the termination setting device 1 according to the embodiment of the present invention. The termination setting device 1 includes a master node 3 and one or more slave nodes 4 connected in series and in a line with the master node 3 as a starting node by wire or wirelessly. In the illustrated example, three

slave nodes

4A, 4B, and 4C having the same functional block groups 41 to 45 are provided, and are collectively referred to as slave nodes 4 unless they need to be distinguished. The master node 3 and slave node 4 are provided in the same or different industrial equipment, respectively, and constitute an industrial system as a whole. Therefore, it can be said that the termination setting device 1 is provided in an industrial system. Desired operations of the industrial system and the termination setting device 1 are realized by one or more slave nodes 4 performing cooperative operations while communicating with the master node 3 .

The industrial equipment provided with the master node 3 and the slave node 4 is equipment used for specific purposes in industrial sites that produce and provide various products and services. Specific examples of industrial equipment will be described later, but for example, boilers/motors, mining machinery, chemical machinery, environmental equipment, tanks, plastic machinery, wind and hydraulic machinery, transportation machinery, and power transmission devices handled by the Japan Society of Industrial Machinery Manufacturers , industrial machinery, industrial machinery, industrial equipment used in industrial sites such as factories of companies such as iron manufacturing machinery, commercial washing machines, etc., manufacturing equipment such as semiconductors, machine tools, printing machines, industrial robots. Note that general-purpose devices such as personal computers and smartphones used for monitoring and controlling these devices also correspond to industrial devices in the context of this embodiment.

The master node 3 and/or the slave node 4 may correspond to an entire industrial device, or may correspond to each part (eg, each component) of one industrial device. As an example of the latter, the master node 3 is configured by the controller of one industrial device, and the driver that drives the motors inside and outside the industrial device based on commands from the controller, and the various parameters inside and outside the industrial device. The slave node 4 may be configured by a sensor that measures and provides to the controller.

A driver that constitutes the slave node 4 controls the movement of the movable parts of the industrial equipment itself (for example, the joints of industrial robots, the processing parts of machine tools, and the table on which the workpiece is placed) and the operations of each part of the industrial equipment. It drives motors and the like for driving movable parts of control parts such as relays and solenoid valves. If the industrial device is a motor driver, the motor to be driven is provided outside the industrial device (slave node 4). A sensor that configures the slave node 4 measures, for example, the position, speed, acceleration, etc., of an object driven by a driver that configures another slave node 4 (eg, a table in a machine tool, a roll of paper unwound by a rotary printing machine), etc. sensors that measure other parameters of the driven object (e.g. web tension or pressure applied by rollers) and parameters related to the environment in which the industrial equipment operates (e.g. temperature, humidity, air pressure, brightness) is a sensor that measures

Some or all of the master node 3 and each of the

slave nodes

4A, 4B, and 4C may be provided in different industrial sites, or may be provided in offices, data centers, etc., away from the industrial sites. The functional blocks of the master node 3 and

slave nodes

4A, 4B, and 4C include hardware resources such as a computer's central processing unit, memory, input device, output device, and peripheral devices connected to the computer. It is realized by the cooperation of the software executed using. Regardless of the type of computer or installation location, each of the above functional blocks may be implemented using the hardware resources of a single computer, or may be implemented by combining hardware resources distributed among multiple computers. . For example, some or all of the functional blocks of the master node 3 and

slave nodes

4A, 4B, and 4C may be realized by a computer installed outside the industrial equipment or outside the industrial site.

The master node 3 includes a termination setting frame transmitting section 31 and a termination setting frame receiving section 32. Each slave node 4 includes a termination setting frame receiving section 41 , a termination designation information confirming section 42 , a termination setting frame retransmitting section 43 , a termination setting section 44 and a termination setting frame returning section 45 .

The termination setting frame transmission unit 31 transmits a termination setting frame 5 including termination designation information 55 that designates termination nodes in the plurality of

slave nodes

4A, 4B, and 4C to the adjacent subsequent slave node 4A.

FIG. 2 shows an example of the termination setting frame 5. The 46-byte fixed-length termination setting frame 5 includes a 1-byte frame number 51, a 1-byte frame type 52, 2-byte connection mode information 53, 2-byte slave number information 54, and a 2-byte termination setting frame. It has designation information 55, a dummy field 56 of 36 bytes, and an error notification field 57 of 2 bytes. Note that the frame length of the termination setting frame 5 and the field lengths of the information 51 to 57 can be appropriately changed according to the communication protocol of the industrial system.

The frame number 51 is the number assigned to the termination setting frame 5 by the master node 3 . The frame type 52 is information indicating the type of frame, and is written with a number uniquely assigned to the termination setting frame as the type (for example, "14" in decimal). The connection mode information 53 is information indicating the connection mode of the slave node 4, for example, information indicating either line or ring. In the present embodiment, in which the terminal setting of the slave node 4 is performed, the connection mode information 53 indicating that the slave node 4 is connected in series and in a line is written. The slave number information 54 is information indicating the total number of slave nodes 4, and in the example of FIG. 1 in which three

slave nodes

4A, 4B, and 4C are provided, a decimal number "3" is written.

The termination designation information 55 is information that designates the termination node in the plurality of

slave nodes

4A, 4B, and 4C, and in the example of FIG. is written. Dummy data consisting of, for example, 36 “0”s is written in the dummy field 56 . These dummy data are meaningless data that are not used in the processing of the termination setting frame 5, but keep the length of the termination setting frame 5 to 46 bytes, which is the same as the communication frame for communication between each node 3, 4. inserted for convenience. A frame check sequence (FCS: Frame Check Sequence) for error detection during communication of the termination setting frame 5 is written in the error notification field 57 .

The termination setting frame receiving unit 41 of the slave node 4A receives the termination setting frame 5 from the master node 3 as the adjacent preceding node. The termination designation information confirmation unit 42 confirms whether or not the termination designation information 55 included in the termination setting frame 5 received from the master node 3 designates itself (slave node 4A) as a termination node. In this example, since the slave node 4C is designated as the termination node, the termination designation information confirmation unit 42 of the slave node 4A confirms that itself is not designated as the termination node. According to this confirmation result, the termination setting frame retransmitting unit 43 retransmits the termination setting frame 5 received from the master node 3 by the termination setting frame receiving unit 41 to the adjacent subsequent slave node 4B.

The termination setting frame receiving unit 41 of the slave node 4B receives the termination setting frame 5 from the slave node 4A as the adjacent preceding node. The termination designation information confirmation unit 42 confirms whether or not the termination designation information 55 included in the termination setting frame 5 received from the slave node 4A designates itself (slave node 4B) as a termination node. In this example, since the slave node 4C is designated as the termination node, the termination designation information confirmation unit 42 of the slave node 4B confirms that itself is not designated as the termination node. According to this confirmation result, the termination setting frame retransmitting unit 43 retransmits the termination setting frame 5 received by the termination setting frame receiving unit 41 from the slave node 4A to the adjacent subsequent slave node 4C.

The termination setting frame receiving unit 41 of the slave node 4C receives the termination setting frame 5 from the slave node 4B as the adjacent preceding node. The termination designation information confirmation unit 42 confirms whether or not the termination designation information 55 included in the termination setting frame 5 received from the slave node 4B designates itself (the slave node 4C) as a termination node. In this example, since the slave node 4C is designated as the terminal node, the terminal designation information confirmation unit 42 of the slave node 4C confirms that it is designated as the terminal node. Based on this confirmation result, the termination setting unit 44 sets a communication path for returning the communication frame received from the preceding slave node 4B to the preceding slave node 4B.

FIG. 3 schematically shows a mode of termination setting by the termination setting unit 44. FIG. FIG. 3A shows the communication path before termination setting, and FIG. 3B shows the communication path after termination setting. Each slave node 4 has a previous-stage input/output interface (in FIG. 3, the input interface is denoted as "frame entrance" and the output interface is denoted as "frame exit") with the adjacent preceding-stage node (master node 3 or slave node 4). ) and a subsequent input/output interface with the adjacent subsequent slave node 4 .

The slave node 4C before termination setting in FIG. A communication path is formed for transmission to the slave node 4B. On the other hand, in the slave node 4C after the termination setting in FIG. 3B, a communication path is formed to return the communication frame received from the preceding slave node 4B to the preceding slave node 4B.

In this way, a cyclic communication path is formed, with the slave node 4C serving as a terminal node as a loopback point, and the master node 3 as a starting point and an end point, going back and forth through each of the

slave nodes

4A, 4B, and 4C. Information necessary for cooperative operation is timely shared between the nodes 3 and 4 through this communication path, so that the desired operation of the industrial system as a whole is realized. By configuring at least a part of each slave node 4 with a programmable FPGA (Field-Programmable Gate Array) or the like, it is possible to change the communication path or circuit configuration from FIG. 3(A) to FIG. 3(B). It can be easily realized by a change command to FPGA or the like.

In the slave node 4C as a terminal node, after the termination setting unit 44 performs the termination setting as described above, the termination setting frame returning unit 45 receives the termination setting frame 5 received by the termination setting frame receiving unit 41 from the slave node 4B. is sent back to the adjacent preceding slave node 4B. At this time, the slave node 4C may write, in the termination setting frame 5, termination setting completion information indicating that the termination setting by the termination setting unit 44 has been completed.

The termination setting frame returning unit 45 of the slave node 4B returns the termination setting frame 5 received from the adjacent subsequent slave node 4C to the adjacent preceding slave node 4A. The termination setting frame returning unit 45 of the slave node 4A returns the termination setting frame 5 received from the adjacent subsequent slave node 4B to the adjacent master node 3 of the preceding stage. The termination setting frame receiver 32 of the master node 3 receives the termination setting frame 5 from the adjacent subsequent slave node 4A. The master node 3 receives the termination setting frame 5 normally by the termination setting frame receiving unit 32, or receives the termination setting completion information written in the termination setting frame 5 by the slave node 4C as the termination node. With this confirmation, it can be confirmed that the termination setting in the termination node (slave node 4C) has been completed normally.

FIG. 4 is a flowchart of termination setting processing by the termination setting device 1. FIG. "S" in the description of the flowchart represents a step or process. In S1, the termination setting frame transmitter 31 of the master node 3 transmits the termination setting frame 5 to the adjacent subsequent slave node 4A. In S2, the termination setting frame receiving unit 41 of the slave node 4 receives the termination setting frame 5 from the adjacent preceding node. In S3 and S4, the termination designation information confirmation unit 42 confirms whether or not the termination designation information 55 included in the termination setting frame 5 received in S2 designates itself as a termination node. If No in S4, the process proceeds to S5, and the termination setting frame retransmitting unit 43 retransmits the termination setting frame 5 received in S2 to the adjacent slave node 4 in the subsequent stage. The termination setting frame 5 retransmitted in S5 is received in S2 by the slave node 4 in the adjacent subsequent stage.

If Yes in S4, proceed to S6, and the termination setting unit 44 sets a communication path for looping back the communication frame received from the slave node 4 in the previous stage to the slave node 4 in the previous stage. In S7, the termination setting frame return unit 45 receives the termination setting frame 5 received in S2 (in the case of the slave node 4C, which is the terminal node) or the termination setting frame 5 received from the adjacent subsequent slave node 4 (the slave node that is not the terminal node). for

nodes

4B and 4A) to the adjacent preceding node. In S8, the termination setting frame receiver 32 of the master node 3 receives the termination setting frame 5 from the adjacent subsequent slave node 4A. With the successful reception of the termination setting frame 5 in S8, the master node 3 can confirm that the termination setting in the termination node (slave node 4C) has been completed normally.

The termination setting device 1 described above is applicable to any industrial system.

FIG. 5 is a perspective view showing the overall structure of a linear transport system 100, which is an example of an industrial system. The linear transfer system 100 includes a stator 200 that forms an annular rail or track, and a plurality of

movers

300A, 300B, 300C, and 300D (hereinafter referred to as moveable child 300). Electromagnets or coils provided on the stator 200 and permanent magnets provided on the mover 300 face each other to form a linear motor along an annular rail. For example, this linear motor and the driver that drives it constitute the slave node 4 in FIG. Further, a sensor for measuring the position, velocity, acceleration of the mover 300 to be driven by the driver, temperature, humidity, atmospheric pressure, etc. around the linear transfer system 100 may be provided as the slave node 4 in FIG. A master node 3 that can communicate with these slave nodes 4 is provided in a controller (not shown) of the linear transport system 100 . Note that the stator 200 may be provided with a permanent magnet, and the mover 300 may be provided with an electromagnet or a coil.

The rail formed by the stator 200 may be of any shape, not limited to an annular shape. For example, the rails may be linear or curved, one rail may branch into a plurality of rails, or a plurality of rails may merge into one rail. Moreover, the installation direction of the rails formed by the stator 200 is arbitrary. In the example of FIG. It may be arranged in the plane of the corner or in the curved surface.

The stator 200 has a rail surface 210 whose normal direction is the horizontal direction. The rail surface 210 extends in a belt shape along the direction of rail formation, and when forming an annular rail as in the example of FIG. A plurality of electromagnets (not shown) are embedded continuously or periodically in the rail surface 210 that can form rails of any shape. Under the control of a controller (master node 3) (not shown), when a driver (slave node 4) supplies a drive current such as a three-phase alternating current to a large number of electromagnets of the linear motor, the mover 300 equipped with permanent magnets moves along the rail. A traveling magnetic field is generated which drives linearly in the desired tangential direction. In the example of FIG. 5, the normal direction of the rail surface 210 forming the annular rail in the horizontal plane is the horizontal direction, but the normal direction of the rail surface 210 may be the vertical direction or any other direction.

In the stator 200, the positioning unit 220 provided on the upper surface or the lower surface perpendicular to the rail surface 210 has a plurality of magnetic scales (not shown) attached to the mover 300 that can measure the position of a magnetic scale (not shown) as a positioning target. A positioning device (not shown) is continuously or periodically embedded. A magnetic positioning device for positioning a magnetic scale formed by a striped magnetic pattern with a constant pitch generally includes a plurality of magnetic detection heads. The magnetic positioning device can measure the position of the magnetic scale with high accuracy by shifting the intervals of the plurality of magnetic detection heads with respect to the pitch or period of the magnetic pattern of the magnetic scale. In a typical magnetic positioning device provided with two magnetic detection heads, for example, the distance between the two magnetic detection heads is shifted by 1/4 pitch with respect to the magnetic pattern of the magnetic scale (the phase is shifted by 90 degrees). .

It should be noted that the positioning device provided on the stator 200 and the positioning target attached to the mover 300 are not limited to the magnetic type as described above, and may be optical or other type. In the case of the optical type, the mover 300 is attached with an optical scale formed by a striped pattern with a constant pitch, and the stator 200 is provided with an optical positioning device capable of optically reading the striped pattern of the optical scale. In the magnetic type or the optical type, since the positioning device measures the positioning target (magnetic scale or optical scale) without contact, the object conveyed by the mover 300 scatters and reaches the positioning point (top surface of the stator 200). It is possible to reduce the risk of malfunction of the positioning device when it enters. However, with the optical method, if the optical scale is covered by a transported object such as liquid or powder that has entered the positioning location, the positioning accuracy will deteriorate. It is preferable to use a magnetic type that does not deteriorate the positioning accuracy.

The mover 300 includes a mover main body 310 facing the rail surface 210 of the stator 200, a positioning target portion 320 projecting horizontally from the top of the mover main body 310 and facing the positioning portion 220 of the stator 200, and a positioning target. On the side opposite to the positioning section 320 (the side farther from the stator 200), there is provided a conveying section 330 that protrudes horizontally from the mover main body 310 and on which an object to be conveyed is placed or fixed. The mover main body 310 includes one or more permanent magnets (not shown) facing the plurality of electromagnets embedded in the rail surface 210 of the stator 200 along the rail. Since the moving magnetic field generated by the electromagnet of the stator 200 applies linear force in the rail tangential direction to the permanent magnet of the mover 300 , the mover 300 is linearly driven along the rail surface 210 with respect to the stator 200 .

A magnetic scale or an optical scale as a positioning target is provided on the positioning target portion 320 of the mover 300 so as to face the positioning device provided on the positioning portion 220 of the stator 200 . In the example of FIG. 5 in which the positioning device is provided on the upper surface of the stator 200 , a positioning target such as a magnetic scale is attached to the lower surface of the positioning target portion 320 of the mover 300 . When the positioning unit 220 and the positioning target unit 320 are magnetic, the magnetic field between the electromagnet of the rail surface 210 and the permanent magnet of the mover body 310 does not affect the magnetic positioning of the positioning unit 220 and the positioning target unit 320. In the stator 200, it is preferable to form the rail surface 210 and the positioning part 220 on different surfaces or in a separate place, and in the mover 300, form the mover main body 310 and the positioning part 320 on different surfaces or in a separate place. .

FIG. 6 shows the configuration of a printing device 10 as an example of an industrial system. The printing apparatus 10 includes a first printing unit 11A for printing black (K), a second printing unit 11B for printing cyan (C), a third printing unit 11C for printing magenta (M), and a yellow (Y ), and a (register) control device 30 provided with the master node 3 in FIG. The first printing unit 11A to the fourth printing unit 11D are collectively referred to as the printing unit 11 below. Note that the printing colors of each printing unit 11 are not limited to the above, and arbitrary printing colors can be assigned to each printing unit 11 in an arbitrary order. Moreover, in order to print more colors, five or more printing units may be provided.

The first printing unit 11A includes a first plate cylinder 13A, a first impression cylinder 17A, a first drive motor 19A, a first encoder 21A, and a first mark sensor 23A. The second printing unit 11B includes a second plate cylinder 13B, a second impression cylinder 17B, a second drive motor 19B, a second encoder 21B, and a second mark sensor 23B. The third printing unit 11C includes a third plate cylinder 13C, a third impression cylinder 17C, a third drive motor 19C, a third encoder 21C, and a third mark sensor 23C. The fourth printing unit 11D includes a fourth plate cylinder 13D, a fourth impression cylinder 17D, a fourth drive motor 19D, a fourth encoder 21D and a fourth mark sensor 23D. Hereinafter, the first plate cylinder 13A to the fourth plate cylinder 13D are collectively referred to as the plate cylinder 13, the first impression cylinder 17A to the fourth impression cylinder 17D are collectively referred to as the impression cylinder 17, and the first drive motor 19A to the fourth drive motor. 19D is collectively called the drive motor 19, the first encoder 21A to the fourth encoder 21D are collectively called the encoder 21, and the first mark sensor 23A to the fourth mark sensor 23D are collectively called the mark sensor .

The printing device 10 prints on the web 50, which is a roll of paper, as a print material. Each printing unit 11 is installed along the moving direction of the web 50 . The web 50 is guided by the guide rollers 25 arranged along its moving path, and the printing cylinders 13 and impression cylinders 17 of each printing unit 11 produce images of respective colors corresponding to the printing plates wound around the printing cylinder 13 . Printed sequentially.

The plate cylinder 13 has a mark printing section 15 that prints register marks that are measured by the mark sensor 23 for register control. The mark printing section 15 of the first printing unit 11A also prints reference marks for additional printing on the same web 50 . The reference mark may indicate the cutting position of the web 50 after printing is completed, and is also called cut mark. The first register mark is printed at a predetermined first position by the mark printing section 15 of the first plate cylinder 13A, and the second register mark is printed at a predetermined second position by the mark printing section 15 of the second plate cylinder 13B. The third register mark is printed at a predetermined third position by the mark printing section 15 of the third plate cylinder 13C, and the fourth register mark is printed at a predetermined fourth position by the mark printing section 15 of the fourth plate cylinder 13D. printed on Hereinafter, the first to fourth register marks are collectively referred to as register marks.

The circumference of each printing cylinder 13 is the same, and each printing unit 11 prints a picture of each color once by rotating each printing cylinder 13 once, and prints continuously by repeating this process. Each plate cylinder 13 is rotationally driven by a separate drive motor 19 controlled by a motor driver that constitutes slave node 4 in FIG. During the printing operation of the printing device 10, each drive motor 19 is electrically synchronized through the motor driver (slave node 4) under the control of the control device 30 (master node 3), and each plate cylinder 13 rotates in the same manner. rotate at speed. That is, the printing apparatus 10 is configured with a sectional drive system. Each drive motor 19 is provided with an encoder 21 that constitutes the slave node 4 in FIG. 1 on its mechanical axis.

The encoder 21 is an incremental encoder. The encoder 21 outputs a predetermined number of A-phase and B-phase pulse signals and one Z-phase pulse signal for each rotation of the plate cylinder 13 . The A-phase and B-phase pulse signals are counted by a counter, and the Z-phase pulse signal resets the count value. The phase (rotational position) of the plate cylinder 13 is detected from the count value of the pulse signal. The encoder 21 may be of any type as long as it can detect the phase of the plate cylinder 13, and may be an absolute type serial encoder. In addition to the encoder 21 and mark sensor 23 that constitute the slave node 4 in FIG. , the pressure applied to the web 50 by the impression cylinder 17, the tension of the web 50, the temperature, humidity, atmospheric pressure, brightness, etc. around the printing apparatus 10 may be provided as slave nodes 4. FIG.

The present invention has been described above based on the embodiments. It should be understood by those skilled in the art that the embodiments are examples, and that various modifications can be made to combinations of each component and each treatment process, and such modifications are also within the scope of the present invention.

Note that the functional configuration of each device described in the embodiments can be realized by hardware resources or software resources, or by cooperation between hardware resources and software resources. Processors, ROMs, RAMs, and other LSIs can be used as hardware resources. Programs such as operating systems and applications can be used as software resources.

1 Termination setting device 3 Master node 4 Slave node 5 Termination setting frame 31 Termination setting frame transmitter 32 Termination setting frame receiver 41 Termination setting frame receiver 42 Termination designation information confirmation unit 43 Termination setting frame 44 Termination setting unit 45 Termination setting frame return unit 53 Connection mode information 54 Number of slaves information 55 Termination designation information.

Claims

A master node and one or more slave nodes connected in series with the master node as a starting node,
The master node comprises a termination setting frame transmitting unit that transmits a termination setting frame including termination designation information designating a termination node in the slave node,
The slave node is
a termination designation information confirmation unit for confirming whether or not the termination designation information included in the termination setting frame received from the adjacent preceding node designates itself as a termination node;
a termination setting unit configured to set a communication path for returning a frame received from the preceding node to the preceding node when the termination designation information designates itself as a termination node;
a termination setting frame retransmitting unit that retransmits the termination setting frame to an adjacent subsequent slave node when the termination designation information does not specify itself as a termination node;
comprising a
Termination setting device.
The termination setting device according to claim 1, wherein said termination setting frame includes slave number information indicating the number of said slave nodes connected in series.
The termination setting device according to claim 1 or 2, wherein the termination setting frame includes connection mode information indicating that the slave nodes are connected in series.
The termination setting device according to any one of claims 1 to 3, wherein the length of the termination setting frame is the same as a communication frame for communication between nodes.
The termination setting device according to any one of claims 1 to 4, wherein at least one of said master node and said slave node is provided in an industrial device.
transmitting a termination setting frame including termination designation information designating a termination node in one or more slave nodes serially connected with the master node as the starting node, from the master node to an adjacent subsequent slave node;
A slave node that receives the termination setting frame from an adjacent preceding node,
when the termination designation information designates itself as a terminal node, setting a communication path for looping back a frame received from the preceding node to the preceding node;
If the termination designation information does not designate itself as a termination node, resend the termination setting frame to an adjacent subsequent slave node;
Termination setting method.
causing a master node to transmit a termination setting frame including termination designation information designating a termination node in one or more slave nodes connected in series with a master node as a starting node to an adjacent subsequent slave node;
To the slave node that received the termination setting frame from the adjacent preceding node,
if the termination designation information designates itself as a termination node, setting a communication path for looping back a frame received from the preceding node to the preceding node;
If the termination designation information does not designate itself as a termination node, retransmit the termination setting frame to an adjacent subsequent slave node;
Termination setting program.