JP2010257348A - External equipment connecting device, signal conversion apparatus, network system, printing system, and connection control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent unnecessary bus reset from being transmitted. <P>SOLUTION: A first driver 61 transmits and receives a signal transmitted via a first transmission path 24 together with a first communication I/F 54. A second driver 62 transmits and receives a signal transmitted via a second transmission path 26 together with a second communication I/F 55. A conversion unit 65 converts a transmission system of a signal so that the second driver 62 can transmit it with respect to the signal received by the first driver 61. The conversion unit 65 includes an interrupt unit 66 and a replacement part 67. The interrupt unit 66 interrupts bus reset from the second driver 62 when the bus rest to be a signal, by which the first driver 61 initializes a transmission path, is received. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an external device connection device, a signal conversion device, a network system, a printing system, and a connection control program.

  Patent Document 1 specifies a plurality of devices necessary for executing requested data processing from a plurality of electrical devices, and the specified devices constitute segments of a plurality of electrical devices, and identify the segments. Assign segment identifiers to the segmented devices, and filter the data transmitted from the common data bus to each device by each device of the segmented device. A data processing method configured to be able to do so is disclosed. Further, in Patent Document 2, when a print line bus rises and a necessary print line segment is selected, a print line management unit analyzes a user's selection and selects a device necessary for executing a print job on the print line. Disclose the segmentation scheme to be determined.

JP 2003-140848 A US Patent Application Publication No. 2003/0048472

  An object of the present invention is to provide an external device connection device, a signal conversion device, a network system, a printing system, and a connection control program that can prevent an unnecessary bus reset from being transmitted.

  In order to achieve the above object, the present invention according to claim 1 is directed to a first transmission means for transmitting a signal through an IEEE 1394 serial bus, and a signal transmitted by the first transmission means to a signal of a second transmission system. A conversion unit for converting, and a second transmission unit for transmitting a signal of the second transmission method converted by the conversion unit, wherein the conversion unit performs a bus reset transmitted by the first transmission unit. An external device connecting device having a blocking means for blocking the second transmission means.

  According to a second aspect of the present invention, in the first aspect of the present invention, the conversion unit further includes a replacement unit that converts the bus reset transmitted by the first transmission unit with another signal of the second transmission method. The external device connection device.

  According to a third aspect of the present invention, there is provided a signal acquisition means for acquiring a signal transmitted by the IEEE 1394 serial bus, a conversion section for converting the signal acquired by the signal acquisition means into a signal of the second transmission method, and the conversion And a signal sending means for sending a signal of the second transmission method converted by the section, wherein the conversion section shuts off the bus reset acquired by the signal acquisition means so that the signal sending means does not send it. It is the signal converter which has.

  According to a fourth aspect of the present invention, there is provided the signal according to the third aspect, wherein the conversion unit further includes a replacement unit that replaces the bus reset acquired by the signal acquisition unit with another signal of the second transmission method for conversion. It is a conversion device.

  According to a fifth aspect of the present invention, there are provided a plurality of devices, a first transmission means for transmitting a signal of an IEEE 1394 serial bus transmitted from any of the plurality of devices, and a signal transmitted by the first transmission means. Conversion means for converting to a signal of the second transmission method, and second transmission means for transmitting a signal of the second transmission method converted by the conversion means, wherein the conversion means comprises the first transmission method. The network system includes a blocking unit that blocks a bus reset transmitted by the transmission unit from the second transmission unit.

  According to a sixth aspect of the present invention, the conversion means further comprises replacement means for converting the bus reset transmitted by the first transmission means by replacing with another signal of the second transmission method. Network system.

  The present invention according to claim 7 comprises one or more continuous systems in which the plurality of devices perform a series of processes together with the first transmission means and the second transmission means, and stores information related to the continuous systems. And when the first transmission unit transmits the bus reset, the continuous system including the first transmission unit that transmitted the bus reset is stopped based on the information stored in the storage unit. The network system according to claim 6, further comprising control means for controlling.

  The present invention according to claim 8 transmits one or more printing presses, one or more processing devices for performing processing related to the printing presses, and an IEEE 1394 serial bus signal transmitted from any of the printing presses. First transmission means, conversion means for converting a signal transmitted by the first transmission means into a signal of the second transmission method, and a second transmission method of transmitting a signal of the second transmission method converted by the conversion means. 2, and the conversion unit includes a blocking unit that blocks a bus reset transmitted by the first transmission unit from the second transmission unit.

  The present invention according to claim 9 further comprises replacement means for converting the conversion means by replacing the bus reset transmitted by the first transmission means with another signal of the second transmission system. Printing system.

  The present invention according to claim 10 comprises at least one continuous system in which at least one of the printing machine and the processing apparatus performs a series of processes together with the first transmission unit and the second transmission unit, A storage unit that stores information regarding the continuous system; and a first transmission unit that transmits a bus reset based on information stored in the storage unit when the first transmission unit transmits a bus reset. The printing system according to claim 8, further comprising control means for controlling the continuous system to stop.

  The present invention according to claim 11 includes a step of acquiring a signal transmitted by the IEEE 1394 serial bus, a step of blocking the acquired signal from being transmitted when the acquired signal is a bus reset, and the acquired signal being a bus. If not reset, the connection control program causes the computer to execute a step of converting the acquired signal into a signal of the second transmission method and a step of sending the converted signal of the second transmission method.

  According to a twelfth aspect of the present invention, there is provided a step of acquiring a signal transmitted by the IEEE 1394 serial bus, and when the acquired signal is a bus reset, the acquired signal is blocked from being transmitted, and the acquired signal is Replacing the other signal of the transmission method with the conversion, and if the acquired signal is not a bus reset, converting the acquired signal into a signal of the second transmission method, and converting the converted second transmission method A connection control program for causing a computer to execute a signal sending step.

  According to the first aspect of the present invention, it is possible to prevent an unnecessary bus reset from being transmitted.

  According to the second aspect of the present invention, the fact that the bus reset is transmitted can be transmitted by another signal without transmitting an unnecessary bus reset.

  According to the third aspect of the present invention, it is possible to prevent an unnecessary bus reset from being transmitted.

  According to the fourth aspect of the present invention, the fact that the bus reset has been transmitted can be transmitted by another signal without transmitting an unnecessary bus reset.

  According to the fifth aspect of the present invention, it is possible to prevent an unnecessary bus reset from being transmitted.

  According to the sixth aspect of the present invention, the fact that the bus reset has been transmitted can be transmitted by another signal without transmitting an unnecessary bus reset.

  According to the present invention of claim 7, it is possible to stop the continuous system including the first transmission means that has transmitted the bus reset without transmitting an unnecessary bus reset.

  According to the eighth aspect of the present invention, it is possible to prevent an unnecessary bus reset from being transmitted.

  According to the ninth aspect of the present invention, the fact that the bus reset is transmitted can be transmitted by another signal without transmitting an unnecessary bus reset.

  According to the tenth aspect of the present invention, it is possible to stop the continuous system including the first transmission unit that has transmitted the bus reset without transmitting an unnecessary bus reset.

  According to the eleventh aspect of the present invention, it is possible to prevent unnecessary bus resets from being transmitted.

  According to the twelfth aspect of the present invention, the fact that the bus reset is transmitted can be transmitted by another signal without transmitting an unnecessary bus reset.

1 is a configuration diagram illustrating a configuration of a printing system according to an embodiment of the present invention. It is a top view which shows the external appearance of a signal converter. It is a block diagram which shows the hardware constitutions of a signal converter. It is a program block diagram which shows the structure of the connection control program which a signal converter has. It is a flowchart which shows the operation example (S10) at the time of starting of a signal converter and an information management apparatus. FIG. 6 is a flowchart illustrating an example of an operation (S20) performed by the signal conversion device after the start-up operation illustrated in FIG. It is a block diagram which shows the hardware constitutions of a printing press. It is a flowchart which shows an example (S30) of operation | movement of a printing system.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 illustrates a printing system 10 according to an embodiment of the present invention. For example, the printing system 10 includes pre-processing devices 12-1 and 12-2, printing machines 14-1 to 14-3, post-processing devices 16-1 and 16-2, signal conversion devices 18-1 to 18-7, and information. A management device 20 and a power supply device 22 are included.
Hereinafter, when any one of a plurality of components such as the printing machines 14-1 to 14-3 is indicated without being specified, the printing machine 14-1 may be simply abbreviated as "printing machine 14".

  The preprocessing devices 12-1 and 12-2 are paper feeding devices that supply, for example, unprinted roll paper (continuous paper) to the printing machines 14-1 and 14-2, respectively. The signal can be transmitted and received through the transmission path 28. The printing machines 14-1 and 14-2 are printing apparatuses that print black and white images on the front side of roll paper, for example. The printing machines 14-1 and 14-2 can transmit and receive signals via a first transmission path 24 described later, For example, a network in which the topology is a daisy chain is configured via the transmission line 30. Further, the printing machine 14-3 prints a monochrome image on the back side of the roll paper, for example. The printing machine 14-3 constitutes a network in which, for example, the topology is a daisy chain together with the printing machines 14-1 and 14-2. The printing machines 14-1 to 14-3 may be printing apparatuses that form color images. The post-processing devices 16-1 and 16-2 are stack devices that store, for example, rolled paper that has been printed, and are capable of transmitting and receiving signals via a third transmission path 28 described later. .

  As will be described later with reference to FIGS. 2 to 4, etc., the signal conversion devices 18-1 to 18-7 transmit signals between a plurality of transmission paths (buses) that transmit signals using different transmission methods. An interface conversion device for converting a signal.

  For example, the signal converters 18-2, 18-5, and 18-6 are connected to the printers 14-1 to 14-3 via the first transmission paths 24-1 to 24-3, respectively. The first transmission lines 24-1 to 24-3 are cables that transmit signals in accordance with, for example, the IEEE 1394 (first transmission method) standard defined by the Institute of Electrical and Electronics Engineers (IEEE). Yes, consisting of two pairs of twisted pair wires (4 pins).

  The signal converters 18-1 to 18-7 are connected by, for example, second transmission lines 26-1 to 26-6, and constitute a network whose topology is a daisy chain. The second transmission lines 26-1 to 26-7 are cables that transmit signals in accordance with, for example, CAN (Controller Area Network) standards.

  The signal conversion devices 18-1 and 18-4 are connected to the preprocessing devices 12-1 and 12-2, respectively, via third transmission lines 28-1 and 28-3, for example. The signal conversion devices 18-3 and 18-7 are connected to the post-processing devices 16-1 and 16-2 via third transmission lines 28-2 and 28-4, for example. The third transmission lines 28-1 to 28-4 are, for example, specific transmission methods (third transmissions) defined for connecting the signal converter 18 and the preprocessing device 12 or the postprocessing device 16. This is a cable that transmits a signal corresponding to the method.

  The information management device 20 has, for example, the same configuration as the signal conversion device 18 (see FIGS. 2 to 4 and the like), is connected to the signal conversion device 18-1 via the second transmission path 26-7, and is printed. Each unit constituting the system 10 is managed. For example, the pre-processing devices 12-1 and 12-2, the printing machines 14-1 to 14-3, the post-processing devices 16-1 and 16-2, and the signal conversion devices 18-1 to 18-7 are respectively unique. Identification information (ID information) is set, and the information management apparatus 20 acquires and stores ID information of each part constituting the printing system 10 via the signal conversion apparatuses 18-1 to 18-7. In addition, the information management apparatus 20 uses each ID information to distinguish and manage printing apparatuses 32-1 and 32-2, which will be described later, as independent continuous systems, and each of the printing apparatuses 32-1 and 32-2. Manage the sequence of operations.

  The information management device 20 and the signal conversion devices 18-1 to 18-7 form a network in which the topology connected by the second transmission lines 26-1 to 26-7 is a daisy chain. Further, the information management apparatus 20 is connected to the power supply apparatus 22 and accepts the power output from the power supply apparatus 22.

  Further, the information management apparatus 20 is connected to the printing machine 14-1 via the fourth transmission path 30-1, and the printing machine 14-1 is connected to the printing machine 14-2 via the fourth transmission path 30-2. The printer 14-2 is connected to the printer 14-3 via the fourth transmission line 30-3. The fourth transmission paths 30-1 to 30-3 are cables that transmit signals in accordance with, for example, a standard of LAN (Local Area Network).

The printing system 10 is set so as to constitute printing apparatuses 32-1 and 32-2, which are continuous systems that perform, for example, two independent series of printing, and operate under the management of the information management apparatus 20.
For example, the printing device 32-1 performs printing on the front side of the roll paper supplied by the preprocessing device 12-2, the printing machine 14-2 performs printing on the front side, and the printing machine 14-3 performs printing on the back side. A sequence is set so that the post-processing device 16-2 winds up the rolled paper. In addition, the printing device 32-2, for example, performs printing on the surface of the roll paper supplied by the preprocessing device 12-1, and the post-processing device 16- A sequence is set so that 1 is wound up.
Note that the continuous system configured in the printing system 10 can be arbitrarily reconfigured.

Next, the signal conversion devices 18-1 to 18-7 (information management device 20) will be described in detail.
FIG. 2 is a top view showing the appearance of the signal conversion device 18.
FIG. 3 is a block diagram illustrating a hardware configuration of the signal conversion device 18.
FIG. 4 is a program configuration diagram showing the configuration of the connection control program 60 included in the signal conversion device 18.
The information management device 20 has the same configuration as the signal conversion device 18 as described above.

  As shown in FIG. 2, the signal conversion device 18 includes a signal conversion device main body 40, first connection portions 42-1 and 42-2, and a second connection portion provided on the outer surface of the signal conversion device main body 40. 44-1 and 44-2, a third connection portion 46, a fourth connection portion 48, and a power supply connection portion 49.

  The first connection units 42-1 and 42-2 are connectors that can connect the first transmission path 24, respectively. The second connection portions 44-1 and 44-2 are connectors that are connectable to the second transmission path 26, respectively. The third connection unit 46 is a connector that can connect the third transmission path 28. The fourth connection portion 48 is a connector that can connect the fourth transmission path 30. The power supply connection portion 49 is a connector provided to allow the power supply device 22 to be connected.

  As shown in FIG. 3, the signal conversion device 18 includes a CPU 50, a storage unit 52, first communication interfaces (I / F) 54-1 and 54-2, and a second communication interface (I / F) 55. -1, 55-2, a third communication interface (I / F) 56, and a fourth communication interface (I / F) 57, which are connected to each other via a control bus 58.

  The CPU 50 executes a connection control program 60 to be described later, and controls each part constituting the signal conversion device 18. The storage unit 52 includes a memory for storing a connection control program 60, which will be described later with reference to FIG.

  The first communication I / F 54 is connection hardware for transmitting and receiving a signal transmitted through the first transmission path 24 by connecting the first transmission path 24 to the first connection unit 42. . The second communication I / F 55 is connection hardware for transmitting and receiving a signal transmitted through the second transmission path 26 by connecting the second transmission path 26 to the second connection unit 44. . The third communication I / F 56 is connection hardware for transmitting and receiving a signal transmitted through the third transmission path 28 by connecting the third transmission path 28 to the third connection unit 46. . The fourth communication I / F 57 is connection hardware for transmitting and receiving a signal transmitted through the fourth transmission path 30 by connecting the fourth transmission path 30 to the fourth connection unit 48. .

  As shown in FIG. 4, the connection control program 60 includes first drivers 61-1 and 61-2, second drivers 62-1 and 62-2, a third driver 63, a fourth driver 64, and conversion. The unit 65 is configured.

  The first driver 61 sends and receives (acquires and sends out) signals transmitted through the first transmission path 24 together with the first communication I / F 54 under the control of the CPU 50. The second driver 62 sends and receives signals transmitted through the second transmission path 26 together with the second communication I / F 55 under the control of the CPU 50. The third driver 63 sends and receives signals transmitted via the third transmission path 28 together with the third communication I / F 56 under the control of the CPU 50. The fourth driver 64 sends and receives signals transmitted through the fourth transmission path 30 together with the fourth communication I / F 57 under the control of the CPU 50.

  The conversion unit 65 receives the signal received (acquired) by any of the first driver 61, the second driver 62, the third driver 63, and the fourth driver 64. The signal transmission method is converted so that the driver 61, the second driver 62, the third driver 63, and the fourth driver 64 can transmit (send). That is, the conversion unit 65 is provided between a plurality of transmission paths (buses) that transmit signals according to different transmission methods, and performs mutual conversion (signal method mutual conversion) so that signals are transmitted between the plurality of transmission paths. ) Conversion software.

The conversion unit 65 is configured to include a blocking unit 66 and a replacement unit 67. When the first driver 61 receives a bus reset, which is a signal for initializing the transmission path, the blocking unit 66 sends the bus reset to the second driver 62, the third driver 63, and the fourth driver 64. Cut off. That is, the blocking unit 66 blocks the bus reset transmitted via the first transmission path 24 from the second transmission path 26, the third transmission path 28, and the fourth transmission path 30. Further, when the first driver 61 receives a bus reset, the replacement unit 67 replaces the bus reset with, for example, a power-off signal (a signal indicating that the power is cut off), and the replaced signal is replaced with the second driver. 62, and sent to the third driver 63 and the fourth driver 64.
The conversion unit 65 may not include the blocking unit 66, and the replacement unit 67 may be configured to replace the bus reset with a signal other than the bus reset.

FIG. 5 is a flowchart illustrating an operation example (S10) when the signal conversion devices 18-1 to 18-7 and the information management device 20 are activated.
As shown in FIG. 5, when the signal converters 18-1 to 18-7 and the information management apparatus 20 are turned on in step 100 (S 100), the information management apparatus 20 includes the signal conversion apparatuses 18-1 to 18-1. Through 18-7, ID information of each part constituting the printing system 10, ID information of each part for each continuous system, and information for specifying the continuous system (for example, specific information such as a printing device number) are acquired as configuration information. To do. That is, the information management device 20 stores, as configuration information, ID information that configures the printing device and specific information that identifies the printing device for each printing device.
Note that the processing of S100 is an operation of updating the configuration information when the continuous system is reconfigured.

In step 102 (S102), the information management apparatus 20 transfers the configuration information acquired in the process of S100 to the signal conversion apparatuses 18-1 to 18-7.
That is, the information management device 20 and the signal conversion devices 18-1 to 18-7 are configured to store the above-described configuration information.

FIG. 6 is a flowchart illustrating an example (S20) of the operation performed by the signal conversion device 18 after the activation operation illustrated in FIG.
In the operation shown in FIG. 6, the signal of the first transmission method transmitted through the first transmission line 24 is transmitted to the second transmission method by the signal converter 18 with respect to the second transmission line 26. As an example, it is transmitted as a signal.

  In step 200 (S200), the signal conversion apparatus 18 acquires a signal of the first transmission method via the first transmission path 24.

  In step 202 (S202), the signal converter 18 determines whether or not the signal acquired in the process of S200 is a bus reset. If the signal is not a bus reset, the process proceeds to the process of S204. Proceeds to S206.

  In step 204 (S204), the signal conversion device 18 converts the signal acquired in the process of S200 into a signal of the second transmission method.

  In step 206 (S206), the signal converter 18 cuts off the bus reset of the first transmission method with respect to the second transmission path 26, and performs the bus reset of the first transmission method of the second transmission method. For example, it is replaced with a power-off signal. That is, the signal conversion device 18 performs replacement with conversion of the transmission method.

  In step 208 (S208), the signal converter 18 sends a signal of the second transmission method to the second transmission line 26.

FIG. 7 is a block diagram illustrating a hardware configuration of the printing machine 14.
In the printing machine 14 shown in FIG. 7, parts that are substantially the same as the parts constituting the signal converter 18 shown in FIG.

The printing machine 14 includes a CPU 70, a memory 71, a storage device 72, a UI (user interface) device 73, an image forming unit 74, a first communication I / F 54, and a fourth communication I / F 57. Each part which comprises is connected via the control bus 75. FIG. The CPU 70 executes a predetermined process according to a program stored in the memory 71 or the storage device 72 and controls each unit constituting the printing press 14. The memory 71 stores a first driver 61 and a fourth driver 64 (both not shown: see FIG. 4). The storage device 72 includes a hard disk drive (HDD) and stores information supplied via a storage medium 76 such as a CD-ROM. The UI device 73 includes a touch panel, for example, and accepts an instruction input by an operator and displays information related to the printing press 14. The image forming unit 74 forms an image on the front surface or the back surface of roll paper, for example.
Note that any program used in the printing system 10 may be provided via the storage medium 76 or via a network.

Next, an operation example of the printing system 10 (FIG. 1) will be described.
FIG. 8 is a flowchart illustrating an example of the operation of the printing system 10 (S30).

  In step 300 (S300), for example, the printing apparatuses 32-1 and 32-2 each perform printing processing.

  In step 302 (S302), the printing machines 14-1 and 14-3 respectively determine whether or not printing in the printing apparatuses 32-1 and 32-2 has been completed. If printing has not been completed, step S304 is performed. When the printing is finished, the process is finished.

  In step 304 (S304), each of the signal converters 18-2, 18-5, and 18-6 determines whether or not a bus reset has been sent to each of the first transmission lines 24-1 to 24-3 (acquires the bus reset). If the bus reset has not been sent, the process proceeds to S300. If the bus reset has been sent, the process proceeds to S306.

  In step 306 (S306), the signal converter 18 that has acquired the bus reset blocks the bus reset from the second transmission line 26.

  In step 308 (S308), the signal converter 18 that has acquired the bus reset replaces the bus reset with the power-off signal of the second transmission method.

  In step 310 (S310), the signal conversion device 18 that has acquired the bus reset outputs, for example, information specifying the printing device to which the signal conversion device 18 belongs (for example, specific information such as a printing device number) and a power-off signal. Transfer (broadcast transmission) is performed via the second transmission path 26 to the conversion devices 18-1 to 18-7 and the information management device 20.

  In step 312 (S312), the signal converters 18-1 to 18-7 use the specific information transmitted in the process of S310 and belong to the same printing apparatus as the signal converter 18 that acquired the bus reset. If the printers belong to different printing apparatuses, the process proceeds to S300. If the printers belong to the same printing apparatus, the process proceeds to S314.

  In step 314 (S314), each signal conversion device 18 belonging to the same printing device as the signal conversion device 18 that has acquired the bus reset stops the connected pre-processing device 12, printing press 14, or post-processing device 16. The pre-processing device 12, the printing press 14, and the post-processing device 16 included in the printing device to which the signal conversion device 18 that has acquired the bus reset belongs are determined in advance by sending a signal indicating that it should be performed or a signal to be stopped. Control to stop in order (procedure).

  That is, the printing system 10 is connected to the first transmission path 24 of either of the printing devices 32-1 and 32-2 when the printing devices 32-1 and 32-2 are printing, for example. When the signal conversion device 18 acquires the bus reset, the printing device 32 to which the signal conversion device 18 that has acquired the bus reset belongs stops in a predetermined order, and the printing device 32 to which the signal conversion device 18 that has acquired the bus reset does not belong. It is supposed to continue printing.

DESCRIPTION OF SYMBOLS 10 Printing system 12-1, 12-2 Pre-processing apparatus 14-1 to 14-3 Printing machine 16-1, 16-2 Post-processing apparatus 18-1 to 18-7 Signal conversion apparatus 20 Information management apparatus 22 Power supply apparatus 24 -1 to 24-3 First transmission path 26-1 to 26-6 Second transmission path 28-1 to 28-4 Third transmission path 30-1 to 30-3 Fourth transmission path 32-1 , 32-2 Printing device 40 Signal conversion device main body 42-1, 42-2 First connection unit 44-1, 44-2 Second connection unit 46 Third connection unit 48 Fourth connection unit 50 CPU
52 Storage Units 54-1 and 54-2 First Communication I / F
55-1, 55-2 Second communication I / F
56 Third communication I / F
57 Fourth communication I / F
60 connection control programs 61-1 and 61-2 first driver 62-1 and 62-2 second driver 63 third driver 64 fourth driver 65 conversion unit 66 blocking unit 67 replacement unit

Claims (12)

First transmission means for transmitting a signal via an IEEE 1394 serial bus;
A converter that converts the signal transmitted by the first transmission means into a signal of the second transmission method;
Second transmission means for transmitting a signal of the second transmission method converted by the conversion unit;
Comprising
The converter is
An external device connection apparatus comprising: a blocking unit that blocks a bus reset transmitted by the first transmission unit from the second transmission unit. The converter is
The external device connection apparatus according to claim 1, further comprising a replacement unit that replaces the bus reset transmitted by the first transmission unit with another signal of the second transmission method for conversion. A signal acquisition means for acquiring a signal transmitted by the IEEE 1394 serial bus;
A conversion unit that converts the signal acquired by the signal acquisition unit into a signal of the second transmission method;
Signal transmission means for transmitting a signal of the second transmission method converted by the conversion unit;
Comprising
The converter is
A signal conversion device comprising: blocking means for blocking the bus reset acquired by the signal acquisition means from being sent out by the signal transmission means. The converter is
The signal conversion apparatus according to claim 3, further comprising replacement means for replacing the bus reset acquired by the signal acquisition means with another signal of the second transmission method for conversion. Multiple devices,
A first transmission means for transmitting an IEEE 1394 serial bus signal transmitted by any of the plurality of devices;
Conversion means for converting the signal transmitted by the first transmission means into a signal of the second transmission method;
Second transmission means for transmitting a signal of the second transmission method converted by the conversion means;
Comprising
The converting means includes
A network system comprising: blocking means for blocking a bus reset transmitted by the first transmission means from the second transmission means. The converting means includes
6. The network system according to claim 5, further comprising replacement means for replacing the bus reset transmitted by the first transmission means with another signal of the second transmission method for conversion. The plurality of devices constitute one or more continuous systems that perform a series of processes together with the first transmission means and the second transmission means,
Storage means for storing information relating to the continuous system;
Control means for controlling to stop the continuous system including the first transmission means that has transmitted the bus reset based on the information stored in the storage means when the first transmission means transmits the bus reset; ,
The network system according to claim 6, further comprising: One or more printing presses;
One or more processing devices that perform processing associated with the printing press;
A first transmission means for transmitting an IEEE 1394 serial bus signal transmitted by any of the printing presses;
Conversion means for converting the signal transmitted by the first transmission means into a signal of the second transmission method;
Second transmission means for transmitting a signal of the second transmission method converted by the conversion means;
Comprising
The converting means includes
A printing system comprising: a blocking unit configured to block a bus reset transmitted by the first transmission unit from the second transmission unit. The converting means includes
9. The printing system according to claim 8, further comprising replacement means for replacing the bus reset transmitted by the first transmission means with another signal of the second transmission method. At least one of the printing machine and the processing apparatus constitutes one or more continuous systems that perform a series of processes together with the first transmission unit and the second transmission unit,
Storage means for storing information relating to the continuous system;
Control means for controlling to stop the continuous system including the first transmission means that has transmitted the bus reset based on the information stored in the storage means when the first transmission means transmits the bus reset; ,
The printing system according to claim 8, further comprising: Obtaining a signal transmitted by the IEEE 1394 serial bus;
If the acquired signal is a bus reset, blocking to not send the acquired signal;
If the acquired signal is not a bus reset, converting the acquired signal into a signal of the second transmission method;
Sending the converted signal of the second transmission method;
A connection control program that causes a computer to execute. Obtaining a signal transmitted by the IEEE 1394 serial bus;
When the acquired signal is a bus reset, the acquired signal is blocked from being sent, and the acquired signal is replaced with another signal of the second transmission method for conversion, and
If the acquired signal is not a bus reset, converting the acquired signal into a signal of the second transmission method;
Sending the converted signal of the second transmission method;
A connection control program that causes a computer to execute.

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