JP2007141137A - Information processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processing apparatus that enables reliable detection of operational failures. <P>SOLUTION: In a sheet inversion device 2, a communication part 24 receives a communication signal sent by a main part 1; a CPU 21 monitors the communication signal received by the communication part 24, accepts switching to an analyzer mode for communication signal measurement, and when accepting switching to the analyzer mode, determines whether or not the content of the monitored communication signal is the same as trigger conditions stored in advance; and if the content of the communication signal is the same as the trigger conditions stored in advance, a communication part 26 outputs information representing that the content of the communication signal is the same as the trigger conditions stored in advance to a display device 61 connected to the sheet inversion device 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information processing apparatus including a plurality of information communication devices that are communicably connected to each other via a communication line.

In information processing devices such as printers, copiers, and facsimiles that are already widely used, multiple information communication devices are connected to a single bus, and each information communication device transmits and receives signals using the serial communication method. There is a system to do. Examples of the information communication device include a block type option feeder (paper feeding device), a duplexer (paper reversing device), and the like. These are generally configured to transmit information from the main body to each device by selecting a select signal assigned to each device from the main body side. At the time of debugging when developing the above-described system, it is common to perform debugging while drawing a communication line to the outside and analyzing a signal and a protocol with a measuring device such as an oscilloscope or a logic analyzer. In the field of the exchange OS software for communication system devices, for example, a debugging device shown in Patent Document 1 has been proposed.
Japanese Patent No. 2856167

  However, since the communication line is drawn to the outside during debugging when developing the above system, the signal is easily affected by noise. Therefore, it is difficult to determine whether a failure found as a result of debugging is a design-inclusive failure or a sudden failure due to the influence of noise.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an information processing apparatus that can reliably find malfunctions in operation.

  An information processing apparatus according to the present invention is an information processing apparatus that includes a plurality of information communication devices connected to each other via a communication line, and one information communication device of the plurality of information communication devices includes: Receiving means for receiving a communication signal transmitted by the information communication device, monitoring means for monitoring the communication signal received by the receiving means, and accepting means for accepting switching to a measurement mode for measuring the communication signal And determining means for determining whether the content of the communication signal monitored by the monitoring means is the same as a pre-stored trigger condition when switching to the measurement mode is received by the receiving means. When the determination means determines that the content of the communication signal is the same as the trigger condition stored in advance, the content of the communication signal is determined in advance. Information indicating that it is the same as the trigger condition is 憶, and output means for outputting to the display device connected to the one of the information communication apparatus.

  According to this configuration, in one information communication device of the plurality of information communication devices, a communication signal transmitted by another information communication device is received, and the received communication signal is monitored. Then, when switching to the measurement mode for measuring the communication signal is accepted, and when switching to the measurement mode is accepted, whether or not the content of the monitored communication signal is the same as the trigger condition stored in advance Is judged. When it is determined that the content of the communication signal is the same as the trigger condition stored in advance, information indicating that the content of the communication signal is the same as the trigger condition stored in advance is stored in one information communication device. Output to the connected display device.

  Accordingly, since a communication signal transmitted by another information communication device is output to a display device connected to one information communication device, there is no need to draw out communication lines connecting a plurality of information communication devices, and the influence of noise. Communication signals that do not receive the signal are measured, and malfunctions can be reliably detected. Further, it is determined whether or not the content of the communication signal is the same as the preset trigger condition, and information indicating that the content of the communication signal is the same as the preset trigger condition is displayed on the display device. The user can check whether a communication signal that satisfies a preset trigger condition is normally communicated.

  The information processing apparatus further includes storage means for storing event log information including an occurrence time of an event corresponding to the communication signal and event information for specifying an event corresponding to the communication signal, The output means preferably outputs event log information stored in the storage means to the display device based on an instruction from an input device connected to the first information communication device.

  According to this configuration, the event log information including the occurrence time of the event corresponding to the communication signal and the event information for specifying the event corresponding to the communication signal is stored in the storage unit, and based on an instruction from the input device Since the event log information stored in the storage means is output to the display device, the user can easily identify the event in which the failure occurred by checking the event log information displayed on the display device. .

  Further, in the above information processing apparatus, when switching to the measurement mode is accepted by the accepting unit, a reception mode is set in which only reception is performed without responding to a communication signal transmitted by another information communication device. It is preferable to further include a reception mode setting means.

  According to this configuration, when switching to the measurement mode is accepted, it is set to a reception mode in which only reception is performed without responding to a communication signal transmitted by another information communication device. The processing load for the communication device to process the communication signal can be reduced.

  In the above information processing apparatus, even if the reception unit is set to the reception mode by the reception mode setting unit, the first information communication device transmitted by another information communication device is A connection notification signal for notifying the other information communication device that the first information communication device is connected is returned in response to a connection confirmation signal for confirming the connection. It is preferable to perform only reception without responding to communication signals other than signals.

  According to this configuration, even when the reception mode is set, a connection confirmation signal for confirming that one information communication device transmitted by another information communication device is connected. A connection notification signal for notifying other information communication devices that one information communication device is connected is returned, and only reception is performed without responding to communication signals other than the connection notification signal. For example, when it is determined that one information communication device is not connected by another information communication device because no connection notification signal is returned from one information communication device, the other information communication device changes to one information communication device. There is a possibility that the communication signal is not transmitted. Therefore, in one information communication device, a connection notification signal is returned, and communication is performed from another information communication device to one information communication device by performing only reception without responding to communication signals other than the connection notification signal. A signal can be transmitted.

  In the information processing apparatus, the information processing apparatus is an image forming apparatus that forms an image, and the information communication device includes a main body unit that controls the entire image forming apparatus, and a paper feeding device that feeds paper. And a paper reversing device that reverses the paper fed by the paper feeding device, and the main body, the paper feeding device, and the paper reversing device are communicably connected by a set of communication lines, Preferably, the one information communication device is any one of the main body, the paper feeding device, and the paper reversing device.

  According to this configuration, the main body unit that controls the entire image forming apparatus, the paper feeding device that feeds paper, and the paper reversing device that reverses the paper fed by the paper feeding device communicate with each other via a set of communication lines. The present invention can be applied to a connected image forming apparatus. In particular, in the case of an image forming apparatus in which it is difficult to pull out a communication line connecting the main body, the paper feeding device, and the paper reversing device, any one of the main body, the paper feeding device, and the paper reversing device. By providing the above receiving means, monitoring means, receiving means, judging means and output means, it is not necessary to draw out the communication line, and it is possible to measure a communication signal that is not affected by noise, and to ensure operation failure. Can be found in.

  According to the present invention, since a communication signal transmitted by another information communication device is output to a display device connected to one information communication device, there is no need to draw out communication lines connecting a plurality of information communication devices. Communication signals that are not affected by noise are measured, and malfunctions can be reliably detected.

  Hereinafter, an information processing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an image forming apparatus which is an example of an information processing apparatus according to an embodiment of the present invention. An image forming apparatus 10 shown in FIG. 1 is a printer apparatus, a copying machine, a facsimile apparatus, or the like. The image forming apparatus 10 includes a main body 1, a paper reversing device 2, a first paper feeding device 3, and a second paper feeding device 4 which are examples of information communication devices.

  The main body 1 controls the entire image forming apparatus 10, and includes a CPU (Central Processing Unit) 11, a RAM (Random Access Memory) 12, a ROM (Read Only Memory) 13, a communication unit 14, and an image forming unit 15. Is provided. The CPU 11, RAM 12, ROM 13, communication unit 14, and image forming unit 15 are connected to each other via an internal bus 16 so that they can communicate with each other.

  The CPU 11 controls the paper reversing device 2, the first paper feeding device 3, and the second paper feeding device 4 by executing a control program stored in the ROM 13. The RAM 12 is assigned as a work area for the CPU 11. The ROM 13 stores in advance a control program for controlling the operation of the CPU 11. The communication unit 14 is communicably connected to the paper reversing device 2, the first paper feeding device 3, and the second paper feeding device 4, and transmits a communication signal (control signal) output by the CPU 11 to the paper reversing device. 2. A response signal transmitted from the sheet reversing device 2, the first sheet feeding device 3, and the second sheet feeding device 4 is transmitted to the first sheet feeding device 3 and the second sheet feeding device 4. Receive.

  The image forming unit 15 includes a cylindrical photosensitive drum, a charger, an exposure device, a developing device, a transfer roller, and a cleaner. In the image forming unit 15, the photosensitive drum is uniformly charged by the charger, and an electrostatic latent image is formed on the photosensitive drum by the laser beam from the exposure device based on the transmitted image data and the like. A developer (toner) is attached to the electrostatic latent image by the container to form a toner image. Then, the toner image is transferred onto the recording sheet by the transfer roller, and the toner remaining on the surface of the photosensitive drum is removed by the cleaner. The recording sheet on which the toner image has been transferred is fixed by being heated and pressed by the fixing unit, and is discharged outside the apparatus.

  The paper reversing device 2 reverses the recording paper to print both sides of the recording paper, and includes a CPU 21, a RAM 22, a ROM 23, a communication unit 24, a port 25, and a communication unit 26. The CPU 21, RAM 22, ROM 23, communication unit 24, port 25, and communication unit 26 are connected to each other via an internal bus 27 so as to communicate with each other.

  The CPU 21 controls the sheet reversing device 2 by executing a control program stored in the ROM 23. The CPU 21 monitors a communication signal received by the communication unit 24. Further, when the switching to the measurement mode is accepted by the input device 62, the CPU 21 determines whether or not the content of the monitored communication signal is the same as the trigger condition stored in advance. Further, when the CPU 21 determines that the content of the communication signal is the same as the trigger condition stored in advance, the CPU 21 outputs the communication signal to the logic analyzer 5 and the PC (personal computer) 6.

  The RAM 22 is assigned as a work area for the CPU 21. The ROM 23 stores in advance a control program for controlling the operation of the CPU 21. The communication unit 24 is communicably connected to the main body unit 1, the first paper feeding device 3, and the second paper feeding device 4, receives a control signal transmitted from the main body unit 1, and receives a control signal. Is transmitted to the main unit 1.

  The port 25 is connected to the logic analyzer 5 via an external output terminal, and outputs a communication signal to the logic analyzer 5 when the content of the communication signal is the same as the trigger condition stored in advance. The logic analyzer 5 is an example of a measuring device, records a communication signal according to a trigger condition, and displays a waveform of the recorded communication signal.

  The communication unit 26 is connected to the PC 6 and outputs a communication signal to the PC 6 when the content of the communication signal is the same as the trigger condition stored in advance. The PC 6 includes a display device 61 and an input device 62. The display device 61 displays a communication signal corresponding to the trigger condition. The input device 62 accepts switching to a measurement mode for measuring a communication signal. When switching to the measurement mode is accepted by the input device 62, the fact that the measurement mode has been switched is stored in the RAM 22. Further, the input device 62 receives an input by a user of a trigger condition for specifying a communication signal. The trigger condition input by the input device 62 is stored in the RAM 22. The CPU 21 refers to the trigger condition stored in the RAM 22 and determines whether or not the content of the monitored communication signal is the same as the trigger condition stored in advance.

  The first paper feeding device 3 feeds recording paper, and includes a CPU 31, a RAM 32, a ROM 33, and a communication unit 34. The CPU 31 controls the first paper feeding device 3 by executing a control program stored in the ROM 33. The RAM 32 is allocated as a work area for the CPU 31. The ROM 33 stores a control program for controlling the operation of the CPU 31 in advance. The communication unit 34 is communicably connected to the main body unit 1, the sheet reversing device 2, and the second paper feeding device 4, receives a control signal transmitted by the main body unit 1, and a response signal for the control signal Is transmitted to the main unit 1.

  The second paper feeding device 4 feeds recording paper having a paper size different from that of the first paper feeding device 3, and includes a CPU 41, a RAM 42, a ROM 43, and a communication unit 44. The CPU 41 controls the second paper feeding device 4 by executing a control program stored in the ROM 43. The RAM 42 is assigned as a work area for the CPU 41. The ROM 43 stores in advance a control program for controlling the operation of the CPU 41. The communication unit 44 is communicably connected to the main body unit 1, the sheet reversing device 2, and the first paper feeding device 3, receives a control signal transmitted from the main body unit 1, and responds to the control signal. Is transmitted to the main unit 1.

  The communication unit 14 of the main body 1, the communication unit 24 of the sheet reversing device 2, the communication unit 34 of the first paper feeding device 3, and the communication unit 44 of the second paper feeding device 4 are serial communication methods. Each of them is communicably connected via a serial bus 17 for transmitting data. In the present embodiment, the main body 1 is a master device, and the paper reversing device 2, the first paper feeding device 3, and the second paper feeding device 4 are slave devices.

  In the present embodiment, the image forming apparatus 10 corresponds to an example of an information processing apparatus, and the main body 1, the sheet reversing device 2, the first sheet feeding device 3, and the second sheet feeding device 4 are information communication devices. The communication unit 24 corresponds to an example of a reception unit, the CPU 21 corresponds to an example of a monitoring unit, the CPU 21 corresponds to an example of a reception unit, the CPU 21 corresponds to an example of a determination unit, and the communication unit 26 corresponds to an example of an output unit, the RAM 22 corresponds to an example of a storage unit, and the CPU 21 corresponds to an example of a reception mode setting unit.

  Next, a debugging operation of the image forming apparatus 10 shown in FIG. 1 will be described. FIG. 2 is a flowchart for explaining the debugging operation of the image forming apparatus 10 shown in FIG.

  First, the CPU 21 determines whether or not switching to the analyzer mode is accepted by the input device 62 of the PC 6 (step S1). The input device 62 accepts switching to the analyzer mode by the user. At this time, the input device 62 receives an input of a trigger condition for specifying a communication signal to be debugged. Specifically, the input device 62 receives an input of a select signal for specifying a communication signal to be debugged, and receives an input of a protocol for specifying the operation content of the communication signal to be debugged. The select signal is a signal for specifying the destination of the communication signal transmitted by the main unit 1 and is included in the communication signal. The select signal received by the input device 62 is stored in the RAM 22 as a registered select signal. The protocol is information for specifying the operation content of the device controlled by the main body 1 and is included in the communication signal. The protocol accepted by the input device 62 is stored in the RAM 22 as a registration protocol.

  In the present embodiment, switching to the analyzer mode is accepted by the input device 62 of the PC 6, but the present invention is not particularly limited to this, and switching to the analyzer mode is performed by the operation unit provided in the image forming apparatus 10. It may be accepted. Similarly, an input of a trigger condition may be received by an operation unit provided in the image forming apparatus 10.

  If it is determined that switching to the analyzer mode is not accepted (NO in step S1), normal processing is performed (step S2), and the process returns to step S1. Note that the normal process is to execute a function originally provided in the sheet reversing device 2. For example, when a control signal for reversing a fed recording sheet is transmitted from the main body unit 1, The sheet reversing device 2 responds to the control signal and performs processing based on the control signal.

  On the other hand, when it is determined that switching to the analyzer mode is accepted (YES in step S1), the CPU 21 switches the current mode setting from the normal mode to the analyzer mode (step S3). The mode setting contents are stored in the RAM 22, and the CPU 21 stores in the RAM 22 that the normal mode has been switched to the analyzer mode.

  Next, the CPU 21 sets the communication function of the communication unit 24 to the reception mode (step S4). The reception mode is a mode in which the communication unit 24 performs only reception without responding to the communication signal transmitted by the main body unit 1. In the present embodiment, the communication function of the communication unit 24 of the paper reversing device 2 is set to the reception mode. However, the present invention is not particularly limited to this, and in addition to the communication unit 24 of the paper reversing device 2 Thus, the communication functions of the communication unit 34 of the first paper feeding device 3 and the communication unit 44 of the second paper feeding device 4 may be set to the reception mode.

  Next, the CPU 21 monitors a communication signal transmitted via the serial bus 17 and determines whether or not the communication signal is received by the communication unit 24 (step S5). The CPU 21 monitors not only the communication signal addressed to the sheet reversing device 2 but also the communication signals addressed to other devices, that is, the first sheet feeding device 3 and the second sheet feeding device 4. If it is determined that the communication signal is not received by the communication unit 24 (NO in step S5), the above determination is repeated at predetermined time intervals until the communication signal is received by the communication unit 24.

  When it is determined that the communication signal has been received by the communication unit 24 (YES in step S5), the CPU 21 determines whether the select signal included in the communication signal received by the communication unit 24 is stored in the RAM 22 in advance. It is determined whether or not they are the same (step S6). If it is determined that the signal is not the same as the registered select signal (NO in step S6), the communication signal is not a debug target, so the process returns to step S5 to determine whether the communication signal has been received. .

  On the other hand, when it is determined that the registration select signal is the same (YES in step S6), the CPU 21 analyzes the protocol of the communication signal received by the communication unit 24 (step S7).

  Next, the CPU 21 determines whether or not the analyzed protocol is the same as the registration protocol stored in advance in the RAM 22 (step S8). If it is determined that the registration protocol is not the same (NO in step S8), the communication signal is not a debug target, so the process returns to step S5 to determine whether the communication signal is received. For example, an ID number for specifying the operation content is assigned in advance to the operation content of each device, and this ID number is transmitted from the main body unit 1 as a protocol. Therefore, the CPU 21 registers this ID number as a registration protocol, and determines whether or not it matches the ID number included in the communication signal.

  On the other hand, if it is determined that the registration protocol is the same (YES in step S8), the CPU 21 debugs information indicating that the select signal and protocol of the received communication signal match the select signal and protocol registered in advance. Is output to the display device 61 via the communication unit 26 (step S9). The display device 61 displays debug information transmitted by the paper reversing device 2.

  Next, the CPU 21 stores event log information including an event occurrence time corresponding to the communication signal and an event number for specifying the event corresponding to the communication signal in the RAM 22 (step S10).

  Next, the CPU 21 outputs a communication signal that matches the trigger condition to the logic analyzer 5 via the port 25. The logic analyzer 5 displays the signal waveform of the communication signal on the monitor (step S11).

  Next, the CPU 21 determines whether or not to output the event log information stored in the RAM 22 to the display device 61 (step S12). The input device 62 receives an input as to whether or not to display the event log information on the display device 61. When the display of the event log information is accepted by the input device 62, the CPU 21 determines to output the event log information stored in the RAM 22 to the display device 61. When the display of the event log information is not accepted by the input device 62, the CPU 21 determines that the event log information stored in the RAM 22 is not output to the display device 61.

  If it is determined that the event log information stored in the RAM 22 is not output to the display device 61 (NO in step S12), the process proceeds to step S14. On the other hand, when it is determined that the event log information stored in the RAM 22 is to be output to the display device 61 (YES in step S12), the CPU 21 reads the event log information stored in the RAM 22 and displays the read event log information. Then, the data is output to the display device 61 via the communication unit 26 (step S13). The display device 61 displays the event log information transmitted by the paper reversing device 2.

  After the event log information is output or when it is determined not to output the event log information, the CPU 21 determines whether or not to end the analyzer mode (step S14). The input device 62 receives the end of the analyzer mode by the user. When the end of the analyzer mode is accepted by the input device 62, the CPU 21 determines to end the analyzer mode. If the input device 62 does not accept the end of the analyzer mode, the CPU 21 determines not to end the analyzer mode.

  Here, when it is determined not to end the analyzer mode (NO in step S14), in order to continue monitoring the communication signal, the process returns to step S5, and it is determined whether or not the communication signal is received. On the other hand, when it is determined to end the analyzer mode (YES in step S14), the CPU 21 cancels the reception mode set in the communication function of the communication unit 24 (step S15). By canceling the reception mode, the communication unit 24 can transmit a response signal to the communication signal transmitted by the main body unit 1.

  Next, the CPU 21 switches the current mode setting from the analyzer mode to the normal mode (step S16). At this time, the CPU 21 stores in the RAM 22 that the analyzer mode has been switched to the normal mode.

  Thus, in the paper reversing device 2 (one information communication device) of the main body 1, the paper reversing device 2, the first paper feeding device 3, and the second paper feeding device 4 (a plurality of information communication devices). The communication signal transmitted by the main unit 1 (other information communication device) is received, and the received communication signal is monitored. When switching to the analyzer mode (measurement mode) for measuring the communication signal is accepted and switching to the analyzer mode is accepted, the content of the monitored communication signal is the same as the trigger condition stored in advance. It is determined whether or not there is. When it is determined that the content of the communication signal is the same as the trigger condition stored in advance, information indicating that the content of the communication signal is the same as the trigger condition stored in advance is the paper reversing device 2 (1 Output to the display device 61 connected to the information communication device.

  Accordingly, since the communication signal transmitted by the main body 1 is output to the display device 61 connected to the paper reversing device 2, the main body 1, the paper reversing device 2, the first paper feeding device 3, and the second paper feeding device are output. It is not necessary to pull out the serial bus 17 (communication line) for connecting the paper device 4, and communication signals that are not affected by noise are measured, so that malfunctions can be reliably detected. Further, whether or not the content of the communication signal is the same as the preset trigger condition is determined, and information indicating that the content of the communication signal is the same as the preset trigger condition is displayed on the display device 61. The user can confirm whether a communication signal that satisfies a preset trigger condition is normally communicated.

  In addition, event log information including an occurrence time of an event corresponding to the communication signal and an event number for specifying the event corresponding to the communication signal is stored in the RAM 22 and stored in the RAM 22 based on an instruction from the input device 62. Since the event log information being output is output to the display device 61, the user can easily identify the event in which the problem has occurred by checking the event log information displayed on the display device 61.

  Further, when the switching to the analyzer mode is accepted, the sheet reversing device 2 processes the communication signal because it is set to a reception mode in which only reception is performed without responding to the communication signal transmitted by the main body unit 1. Processing load to be reduced.

  Furthermore, a main body unit 1 that controls the entire image forming apparatus 10, a sheet feeding device 3, 4 that feeds a sheet, and a sheet reversing device 2 that reverses the sheet fed by the sheet feeding device 3, 4 are provided. It can be applied to the image forming apparatus 10 that is communicably connected to each other via the communication line. In particular, in the case of the image forming apparatus 10 or the like in which it is difficult to pull out the serial bus 17 (communication line) connecting the main body 1, the paper feeding devices 3 and 4, and the paper reversing device 2, the main body 1, Since any one of the paper feeding devices 3 and 4 and the paper reversing device 2 has the above function, it is not necessary to pull out the serial bus 17 to the outside of the device, and a communication signal that is not affected by noise is measured. It is possible to detect malfunctions of operation with certainty.

  In the present embodiment, when the switching to the measurement mode is accepted, the reception mode is set in which only reception is performed without responding to the communication signal transmitted by the main body unit 1. The connection confirmation signal for confirming that the sheet reversing device 2 transmitted by the main body 1 is connected even when the communication unit 24 is set to the reception mode. A connection notification signal for notifying the main body unit 1 that the paper reversing device 2 is connected may be returned, and reception may be performed without responding to communication signals other than the connection notification signal. .

  In this case, even when the reception mode is set, the paper reversing device 2 is connected to the connection confirmation signal for confirming that the paper reversing device 2 transmitted by the main body 1 is connected. A connection notification signal for notifying the main body unit 1 that the connection is made is returned, and only reception is performed without responding to communication signals other than the connection notification signal. For example, if it is determined by the main body 1 that the paper reversing device 2 is not connected because no connection notification signal is returned from the paper reversing device 2, a communication signal may not be transmitted from the main body 1 to the paper reversing device 2. There is. Therefore, in the paper reversing device 2, a connection notification signal is returned, and a communication signal is transmitted from the main body unit 1 to the paper reversing device 2 by performing only reception without responding to communication signals other than the connection notification signal. be able to.

  Further, for example, when it is determined that the first paper feeding device 3 is set to the reception mode and the first paper feeding device 3 is not connected, the length of the paper transport path when feeding paper is One sheet feeding device 3 becomes longer by the length of the conveyance path for conveying the recording sheet, and contradiction occurs in the sheet feeding timing. Therefore, as described above, the connection confirmation signal for confirming that the first sheet feeding device 3 transmitted by the main body 1 is connected even when the reception mode is set. By returning a connection notification signal for notifying the main body unit 1 that the first sheet feeding device 3 is connected and performing only reception without responding to communication signals other than the connection notification signal. Thus, no contradiction occurs in the sheet feeding timing, and appropriate control can be performed.

  In the present embodiment, the sheet reversing device 2 includes the communication unit 26 connected to the PC 6 and the port 25 connected to the logic analyzer 5, but the present invention is not particularly limited thereto, and the main body unit Any one of the first paper feeding device 3 and the second paper feeding device 4 may include the communication unit 26 and the port 25.

  In the present embodiment, the image forming apparatus includes the main body 1, the sheet reversing apparatus 2, the first sheet feeding apparatus 3, and the second sheet feeding apparatus 4. However, the present invention is particularly limited to this. However, the image forming apparatus 10 may further include other information communication devices constituting the image forming apparatus 10, such as a document reading device that reads a document, a post-processing device that performs recording paper stapling processing and sorting processing, and the like. Good.

1 is a block diagram illustrating a schematic configuration of an image forming apparatus that is an example of an information processing apparatus according to an embodiment of the present invention. 3 is a flowchart for explaining a debugging operation of the image forming apparatus shown in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main-body part 2 Paper reversing device 3 1st paper feeder 4 2nd paper feeder 5 Logic analyzer 6 PC
10 Image forming apparatus 11, 21, 31, 41 CPU
12, 22, 32, 42 RAM
13, 23, 33, 43 ROM
14, 24, 26, 34, 44 Communication unit 15 Image forming unit 16, 27 Internal bus 17 Serial bus 25 Port 61 Display device 62 Input device

Claims (5)

An information processing apparatus comprising a plurality of information communication devices connected to each other via a communication line,
One information communication device of the plurality of information communication devices is:
Receiving means for receiving a communication signal transmitted by another information communication device;
Monitoring means for monitoring the communication signal received by the receiving means;
Accepting means for accepting switching to a measurement mode for measuring the communication signal;
A determination unit that determines whether or not the content of the communication signal monitored by the monitoring unit is the same as a pre-stored trigger condition when switching to the measurement mode is received by the reception unit;
When the determination means determines that the content of the communication signal is the same as the trigger condition stored in advance, information indicating that the content of the communication signal is the same as the trigger condition stored in advance, An information processing apparatus comprising: output means for outputting to a display device connected to the one information communication device. Storage means for storing event log information including an occurrence time of an event corresponding to the communication signal and event information for specifying an event corresponding to the communication signal;
The output means outputs the event log information stored in the storage means to the display device based on an instruction from an input device connected to the first information communication device. Information processing device.   A reception mode setting unit configured to set a reception mode in which only reception is performed without responding to a communication signal transmitted by another information communication device when switching to the measurement mode is received by the reception unit; The information processing apparatus according to claim 1 or 2.   The reception unit is configured to confirm that the first information communication device transmitted by another information communication device is connected even when the reception mode is set by the reception mode setting unit. In response to the connection confirmation signal, a connection notification signal for notifying the other information communication device that the first information communication device is connected is returned, and a response is made to a communication signal other than the connection notification signal. 4. The information processing apparatus according to claim 3, wherein only the reception is performed without performing the process. The information processing apparatus is an image forming apparatus that forms an image;
The information communication device includes a main body that controls the entire image forming apparatus, a paper feeding device that feeds paper, and a paper reversing device that reverses the paper fed by the paper feeding device,
The main body, the paper feeding device, and the paper reversing device are communicably connected via a set of communication lines.
5. The information processing apparatus according to claim 1, wherein the one information communication device is any one of the main body, the paper feeding device, and the paper reversing device.

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