JP2011188019A - Digital composite machine - Google Patents

Digital composite machine Download PDF

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JP2011188019A
JP2011188019A JP2010048069A JP2010048069A JP2011188019A JP 2011188019 A JP2011188019 A JP 2011188019A JP 2010048069 A JP2010048069 A JP 2010048069A JP 2010048069 A JP2010048069 A JP 2010048069A JP 2011188019 A JP2011188019 A JP 2011188019A
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update
firmware
digital
control program
version
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JP2010048069A
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Japanese (ja)
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Toshinari Agata
俊成 縣
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Murata Machinery Ltd
村田機械株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique making it possible to easily confirm that farmware update has started. <P>SOLUTION: A management server 3 instructs the farmware update of a printer 11 and a network substrate 12 of a digital composite machine 1 (step S3). The digital composite machine 1 confirms the operation state of the printer 11 and the network substrate 12 (steps S3.2, S3.3) to confirm whether the farmware can be updated or not. If the farmware of the printer 11 and the network substrate 12 can be updated, the digital composite machine 1 notifies the management server 3 of the start of farmware update (step S3.4). After informing the start of farmware update, the digital composite machine 1 acquires data for farmware update from a storage server 4, and uses this update data to update the farmware. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for updating firmware of a digital multi-function peripheral.

  There are various methods for updating the firmware of the digital multi-function peripheral. For example, when the digital multi-function peripheral has a USB (Universal Serial Bus) interface, the firmware can be updated by inserting a USB memory storing update firmware into the USB interface. In addition, it is possible to update the firmware by remote control.

  Japanese Patent Application Laid-Open Publication No. 2003-228561 discloses a method that can instruct updating of printer firmware using a web service.

  In the following Patent Document 1, the printer holds a list in which the version history of already released firmware is recorded. In response to a request from the client device, the printer transmits a list and version information of firmware currently installed in the printer to the client device. Based on the list and version information displayed on the client device, the user instructs the printer on the firmware version to be newly installed. The printer downloads firmware corresponding to the instructed version and updates the firmware.

JP 2001-249815 A

  In Patent Document 1, the printer stores the downloaded firmware in a flash memory and updates the firmware. After updating the firmware, the printer notifies the client device that the firmware update is complete.

  However, it may take a long time to write the downloaded firmware to the flash memory. If the printer is in a state in which access from the client device is not accepted when the firmware is updated, the user cannot confirm from the client device whether the firmware has been updated.

  In view of the above problems, an object of the present invention is to provide a technique capable of easily confirming that firmware update has been started.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a digital multi-function peripheral, wherein a network communication unit that communicates with a management device using a network management protocol, a storage unit that stores installed firmware, In response to the firmware update request received from the management apparatus, it is checked whether the firmware update process can be executed. An update confirmation unit that notifies the management device as a response to the update, and a firmware update unit that updates the firmware using update data after notifying the start of update.

  According to a second aspect of the present invention, in the digital multi-function peripheral according to the first aspect, the network communication unit receives setting information that sets an access method to the storage device that stores the update data from the management device. The network communication unit obtains the update data from the storage device based on the setting information in response to an instruction from the firmware update unit. To do.

  According to a third aspect of the present invention, in the digital multi-function peripheral according to the first or second aspect, when the network communication unit receives the firmware version check request from the management device, the firmware version information is displayed. Transmit to the management device.

  When receiving a firmware update request from the management apparatus, the digital multifunction peripheral according to the present invention checks whether the firmware can be updated. If the firmware can be updated, the digital multi-function peripheral notifies the management apparatus of the start of firmware update as a response to the update request. Firmware update is started after notification of update start. Accordingly, the service person of the digital multi-function peripheral can easily confirm that the firmware update has started.

  The digital multi-function peripheral according to the present invention stores the setting information received from the management apparatus, and acquires update data based on the setting information. Thereby, even if the acquisition destination of the update data is changed, the digital multi-function peripheral can reliably acquire the update data.

  The digital multi-function peripheral according to the present invention transmits firmware version information to the management apparatus in response to a version confirmation request. As a result, the service person can easily determine whether the firmware can be updated.

1 is a block diagram of a firmware update system according to an embodiment of the present invention. It is a block diagram which shows the functional structure of a digital multifunctional device. It is a sequence diagram which shows operation | movement of a firmware update system. It is a list of MIB (Management Information Base) objects related to firmware. It is a list of MIB objects related to access to the storage server. It is a sequence diagram which shows operation | movement of a firmware update system. It is a list of MIB objects related to firmware.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

{1. Configuration of firmware update system}
FIG. 1 is a diagram showing a configuration of a firmware update system according to the present embodiment. A firmware update system 100 illustrated in FIG. 1 includes a digital multi-function peripheral 1, a PC (Personal Computer) 2, a management server 3, and a storage server 4. The digital multi-function peripheral 1 and the PC 2 are connected via a LAN (Local Area Network) 5. The digital multi-function peripheral 1 can communicate with the management server 3 and the storage server 4 via the LAN 5 and the Internet 6.

  The digital multifunction device 1 is installed in an office or the like. An office employee can operate the PC 2 to print document data on the digital multi-function peripheral 1.

  The management server 3 is a device used for maintenance of the digital multifunction device 1 and is used by a service person of the digital multifunction device 1. The management server 3 accesses the digital multi-function peripheral 1 using SNMP (Simple Network Management Protocol). The service person operates the management server 3 and instructs the digital multifunction peripheral 1 to update the firmware. The storage server 4 stores update data 41 and 42 used for updating the firmware of the digital multi-function peripheral 1.

{2. Configuration of Digital Multifunction Machine 1}
FIG. 2 is a block diagram showing a functional configuration of the digital multi-function peripheral 1. The digital multifunction machine 1 includes a printer 11, a network board 12, and a main board 13. In FIG. 2, the display of the FAX function unit, the scanner function unit, and the like of the digital multifunction peripheral 1 is omitted.

  The printer 11 executes print processing in response to a print instruction from the PC 2. The printer 11 includes a flash memory 111, a RAM (Random Access Memory) 112, a CPU (Central Processing Unit) 113, and a printer engine 114.

  The flash memory 111 is a non-volatile memory that stores the raster conversion program 115. The raster conversion program 115 is firmware for the printer 11. The CPU 113 loads the raster conversion program 115 into the RAM 112 and executes it. The document data transmitted from the PC 2 is converted into raster data by the CPU 113 that executes the raster conversion program 115. The printer engine 114 prints raster data on printing paper.

  The network board 12 performs transmission / reception of data using TCP / IP (Transmission Control Protocol / Internet Protocol) or UDP (User Datagram Protocol) / IP. UDP / IP is used for data transmission / reception using SNMP. The network board 12 includes a flash memory 121, a RAM 122, and a CPU 123.

  The flash memory 121 is a non-volatile memory that stores the communication control program 125. The communication control program 125 is firmware for the network board 12. The CPU 123 loads the communication control program 125 into the RAM 122 and executes it. As a result, the network board 12 can communicate with each computer. The network board 12 functions as an SNMP agent by executing the communication control program 125. For this reason, an MIB (Management Information Base) 124 is generated in the RAM 122.

  The main board 13 is a board that performs overall control of the digital multi-function peripheral 1. The main board 13 includes a flash memory 131, a RAM 132, and a CPU 133.

  The flash memory 131 is a non-volatile memory that stores a main program 134, an update confirmation program 135, and an update control program 136. The CPU 133 loads each program stored in the flash memory 131 to the RAM 132 and executes it.

  The main program 134 is firmware that performs overall control of the digital multi-function peripheral 1. The update confirmation program 135 confirms whether each firmware can be updated when the management server 3 instructs to update the firmware. The update control program 136 controls updating of each firmware.

  In the firmware update system 100 having the above-described configuration, the management server 3 instructs the digital multifunction peripheral 1 to update the firmware. The digital multi-function peripheral 1 checks whether the firmware can be updated. If the firmware can be updated, the digital multi-function peripheral 1 notifies the management server 3 of the firmware update start. Firmware update is started after notification of update start. The service person does not need to confirm whether or not the digital multi-function peripheral 1 is updating the firmware. For this reason, the work at the time of updating the firmware is simplified.

{3. Firmware update flow}
The operation of the firmware update system 100 will be described using a case where the raster conversion program 115 and the communication control program 125 are updated as an example.

  Firmware update includes a method for instructing firmware update by designating a firmware version number and a method for instructing update to the latest version of firmware. First, a method for designating firmware update by designating the firmware version number will be described in detail.

{3.1. Confirm version}
FIG. 3 is a sequence diagram showing the operation of the firmware update system 100 until the digital multi-function peripheral 1 starts updating the firmware.

  The service person confirms the version of each firmware before instructing to update the firmware. The service person instructs the management server 3 to check the version of each firmware. The management server 3 transmits a firmware version confirmation request to the digital multi-function peripheral 1 using SNMP (step S1). That is, the management server 3 functions as an SNMP manager.

  On the network board 12, a communication control program 125 is executed. The communication control program 125 functions as an SNMP agent. For this reason, when receiving the version confirmation request, the communication control program 125 generates the MIB 124 and confirms the version of each firmware.

  In the MIB 124, information regarding firmware is defined as a private MIB. FIG. 4 is a diagram showing MIB objects related to each firmware of the digital multi-function peripheral 1 out of information managed by the MIB 124.

  In FIG. 4, mfpFirmName. X (X = 1, 2, 3) indicates the name of each firmware. mfpFirmName. 1 is set to “MAIN” meaning the main program 134. mfpFirmName. 2 is set to “PDL” which means the raster conversion program 115. mfpFirmName. 3 is set to “NETWORK”, which means the communication control program 125.

  mfpFirmVersion. X (X = 1, 2, 3) indicates the version of each firmware. mfpFirmVersion. 1 corresponds to the main program 134 (mfpFirmName.1). mfpFirmVersion. 2 corresponds to the raster conversion program 115 (mfpFirmName.2). mfpFirmVersion. 3 corresponds to the communication control program 125 (mfpFirmName.3). mfpFirmVersion. X is blank when the MIB 124 is generated.

  mfpFirmLatest. X (X = 1, 2, 3) is used when an update to the latest version is instructed. mfpFirmLatest. X is blank when the MIB 124 is generated. mfpFirmLatest. Details of X will be described later.

  After generating the MIB 124, the communication control program 125 outputs a version confirmation command to the main board 13 (step S1.1). The main board 13 outputs the version of the main program 134 to the network board 12 in response to the input of the version confirmation command. The communication control program 125 registers the version of the main program 134 in the MIB 124. As shown in FIG. 4, mfpFirmVersion. 1, the version “A0A0A0” of the main program 134 is registered.

  Similarly, the communication control program 125 outputs a version confirmation command to the printer 11 (step S1.2). As a result, MIB124's mfpFirmVersion. 2, the version “B3B4B5” of the raster conversion program 115 is registered (see FIG. 4). The communication control program 125 checks its own version number (step S1.3), and mfpFirmVersion. “C6C7C8” is registered in 3.

  As a response to the version confirmation request (step S1), the communication control program 125 notifies the management server 3 of the version of each firmware registered in the MIB 124 (step S1.4). The communication control program 125 may generate the MIB 124 and register the version of each firmware immediately after the power of the digital multi-function peripheral 1 is turned on. In this case, the communication control program 125 can omit the processes of steps S1.1 to S1.3 after receiving the version confirmation request (step S1).

{3.2. Setting of access method to storage server}
Reference is again made to FIG. The service person confirms the current versions of the raster conversion program 115 and the communication control program 125 to be updated based on the version notification (step S1.4) received by the management server 3. The service person compares the current version with the updated version of the raster conversion program 115 and the communication control program 125 (hereinafter referred to as “update version”), and updates the raster conversion program 115 and the communication control program 125. Judge whether to do.

  When updating the raster conversion program 115 and the communication control program 125, the management server 3 transmits the setting information 31 in which the access method to the storage server 4 is set to the digital multi-function peripheral 1 using SNMP (step S2). As will be described later, the setting information 31 includes an account and a password necessary for logging in to the storage server 4. For this reason, it is desirable to use SNMP Version 3 in which the SNMP packet is encrypted in communication between the digital multi-function peripheral 1 and the management server 3. The communication control program 125 registers the MIB object related to the access method to the storage server 4 in the MIB 124 based on the received setting information 31.

  FIG. 5 is a diagram showing MIB objects related to access to the storage server 4. The MIB object related to access to the storage server 4 will be described with reference to FIG. mfpServerProtocol indicates a protocol used to access the storage server 4. As a protocol, one of HTTP (Hyper Text Transfer Protocol), HTTPS (Hyper Text Transfer Protocol Security), FTP (File Transfer Protocol), and SMB (Server Message Block) can be set.

  In mfpServerPath, a URL (Uniform Resource Locator) for accessing the storage server 4 is set. mfpServerAccount indicates an account used when logging in to the storage server 4. mfpServerPassword indicates a password used when logging into the storage server 4.

  mfpProxyAddress and mfpProxyPort are set when HTTP or HTTPS is used for access to the storage server 4. mfpProxyAddress indicates the IP address of the proxy server. mfpProxyPort indicates the port number of the proxy server.

{3.3. Firmware update confirmation}
The management server 3 transmits an update request for the raster conversion program 115 and the communication control program 125 using SNMP in accordance with the operation of the service person (step S3). The communication control program 125 updates the MIB 124 by receiving the update request.

  In the update request (step S3), “E4E4E4”, “G3G3G3”, and “0” are set as update versions of the raster conversion program 115, the communication control program 125, and the main program 134. The update version “0” set in the main program 134 indicates that the main program 134 is not an update target.

  The MIB 124 is updated based on the update request (step S3). As shown in FIG. 3, mfpFirmVersion. 2 (corresponding to the raster conversion program 115) is changed to “E4E4E4”. mfpFirmVersion. 3 (corresponding to the communication control program 125) is changed to “G3G3G3”. mfpFirmUpdate. 1 remains “A0A0A0” because the main program 134 is not an update target. mfpFirmVersion. 2 and mfpFirmVersion. 3 is input to the main board 13 (step S3.1). The update instruction command for instructing the update of the two firmwares of the raster conversion program 115 and the communication control program 125 is input.

  An update confirmation program 135 is activated on the main board 13. The update confirmation program 135 confirms the operating states of the printer 11 and the network board 12 in order to confirm whether or not the two firmwares specified by the update instruction command can be updated (steps S3.2 and S3.3). . For example, the update confirmation program 135 determines that the raster conversion program 115 can be updated unless the printer 11 is executing a print job. The update confirmation program 135 determines that the communication control program 125 can be updated if the network board 11 is not receiving a print job or the like. If both the firmware can be updated, the update confirmation program 135 outputs an OK response to the update instruction command to the network board 12.

  Based on the response to the update instruction command, the communication control program 125 transmits an update start notification indicating that updating of the raster conversion program 115 and the communication control program is started to the management server 4 (step S3.4).

  There can be a case where only one of the two firmwares instructed to be updated by the update request (step S3) can be updated. For example, when only the raster conversion program 115 can be updated, an update start notification indicating that only the raster conversion program 115 is updated is transmitted to the management server 3 (step S3.4).

  As described above, the digital multi-function peripheral 1 transmits an update start notification to the management server 3 before starting the firmware update. The service person can determine that the digital multifunction peripheral 1 is updating the firmware by checking the update start notification. Since the service person does not need to confirm the operation of the digital multi-function peripheral 1 after giving an instruction to update the firmware, the labor of the service person can be reduced.

  The digital multi-function peripheral 1 transmits an update start notification before updating the firmware (step S3.4), thereby preventing an SNMP communication error from occurring. The reason for this will be described.

  Consider a case in which the digital multi-function peripheral 1 transmits an update end notification after the firmware update is completed, instead of the update start notification (step S3.4). In SNMP, a timeout time is set. The management server 3 determines that the transmission of the update request has become an error when the update completion notification cannot be received before the timeout time elapses after the transmission of the update request (step S3). Updating the firmware may require a longer time (about several tens of minutes) than the timeout time. For this reason, when an update end notification is used as a response to an update request, the probability that a transmission error will occur due to timeout increases. When a transmission error occurs, the service person must check whether the digital multifunction peripheral 1 is updating firmware, whether a failure has occurred in the digital multifunction peripheral 1, or the like.

  On the other hand, the time until the digital multifunction peripheral 1 transmits the update start notification (step S3.4) is very short compared to the case where the update end notification is transmitted. Since the frequency of occurrence of transmission errors in the update request (step S3) is reduced, the number of times that the service person performs the operation check of the digital multifunction device 1 can be reduced.

{3.4. Firmware update}
FIG. 6 is a sequence diagram showing an operation of the firmware update system 100 at the time of firmware update. The digital multi-functional peripheral 1 transmits an update start notification to the management server 1 (step S3.4), and then starts a firmware update.

  First, the update control program 136 is activated. The update control program 136 instructs the printer 11 and the network board 12 to perform initialization (step 4, S4.1). As a result, the settings of the printer 11 and the network board 12 are reset. Initialization is performed in order to prevent an error from occurring during firmware update.

  The update control program 136 outputs an acquisition instruction command for instructing acquisition of the update data 41 and 42 to the communication control program 125 (step S5). The update data 41 and 42 are data used for updating the raster conversion program 115 and the communication control program 125, respectively.

  The communication control program 125 logs into the storage server 4 based on the setting value of the MIB object shown in FIG. After logging in, the communication control program 125 designates update versions of the raster conversion program 115 and the communication control program 125, and requests the storage server 4 to transmit the update data 41 and 42 (step S5.1). The storage server 4 transmits the update data 41 and 42 to the digital multi-function peripheral 1. The communication control program 125 outputs the received update data 41 and 42 to the main board 13.

  The update control program 136 outputs the update data 41 to the printer 11 and instructs to update the raster conversion program 115 (step S6). The printer 11 rewrites the raster conversion program 115 stored in the flash memory 111 using the update data 41. After completing the rewriting of the raster conversion program 115, the printer 11 notifies the update control program 136 of an update end message (step S6.1).

  Similarly, the network board 12 rewrites the communication control program 125 stored in the flash memory 121 using the update data 42 in response to an instruction (step S7) of the update control program 136. After the rewriting is completed, the network board 12 notifies the update control program 136 of an update end message (step S7.1). Thereby, the update process of the raster conversion program 115 and the communication control program 125 ends. The service person instructs the management server 3 to confirm the version in consideration of the timing when the firmware update is completed. Thereby, the service person can confirm whether or not the update of the firmware has been normally completed.

{3.5. Instructions for updating to the latest version}
In the present embodiment, an example in which a version number is designated and firmware update is instructed has been described. However, the service person can instruct to update the firmware to the latest version. Hereinafter, the flow of updating the firmware to the latest version will be described, focusing on the differences from the update specifying the version number.

  FIG. 7 is a diagram illustrating a change in the setting value of the MIB object related to each firmware when an update to the latest version is instructed. As described above, mfpFirmlatest. X (X = 1, 2, 3) is a MIB object used when updating each firmware to the latest version.

  mfpFirmLatest. 1 corresponds to the main program 134 (mfpFirmName.1). mfpFirmLatest. 2 corresponds to the raster conversion program 115 (mfpFirmName.2). mfpFirmVersion. 3 corresponds to the communication control program 125 (mfpFirmName.3). mfpFirmLatest. X is blank when the MIB 124 is generated.

  Similarly to the above, the service person confirms the version of each firmware of the digital multi-function peripheral 1. The management server 3 transmits an update request for updating the raster conversion program 115 and the communication control program 125 to the latest version according to the operation of the service person (see step S3, FIG. 3). . When the communication control program 125 receives the update request, the communication control program 125 sets mfpFirmlatest. Update X.

  When the communication control program 125 receives the update request, the communication control program 125 sets the mfpFirmlatest. Rewrite X. Specifically, as shown in FIG. 2 and mfpFirmLatest. 3 is set to “1”. mfpFirmLatest. “0” is set to 1. mfpFirmLatest. In X, “1” indicates an update to the latest version, and “0” indicates that no update is performed.

  The communication control program 125 outputs to the main board 13 an update command that instructs to update the raster conversion program 15 and the communication control program 125 to the latest version. Thereafter, the processes of steps S3.1 to S3.4 are executed.

  A flow for acquiring the update data 41 and 42 corresponding to the latest version will be described. After the printer 11 and the network board 12 are initialized (Step 4, S4.1, see FIG. 4), the communication control program 125 stores the latest version numbers of the raster conversion program 115 and the communication control program 125 in the storage server 4. Inquire. Based on the response from the storage server 4, the communication control program 125 determines whether to update the raster conversion program 115 and the communication control program 125.

  If the version numbers of the raster conversion program 115 and the communication control program 125 installed in the digital multifunction device 1 match the latest version number, the digital multifunction device 1 does not execute the update process. If the version numbers of the raster conversion program 115 and the communication control program 125 installed in the digital multifunction device 1 do not match the latest version number, the digital multifunction device 1 determines to start updating the firmware whose version numbers do not match. . When starting to update the firmware, the processes from Steps S4 to S7.1 are executed.

  After completing the firmware update, the service person instructs the management server 3 to confirm the version in consideration of the timing when the update of the raster conversion program 115 and the communication control program 125 is completed. Thereby, the service person can confirm whether the raster conversion program 115 and the communication control program 125 are updated to the latest version.

  MfpFimrVersion. Indicating the version of each firmware. X is not changed even when the raster conversion program 115 and the communication control program 125 are updated to the latest version. mfpFimrVersion. X is updated when the digital multi-function peripheral 1 receives a version confirmation request (see step S1, FIG. 3) after the firmware update is completed.

1 Digital MFP 11 Printer 12 Network Board 13 Printer 100 Firmware Update System 111, 121, 131 Flash Memory 112, 122, 132 RAM
113, 123, 133 CPU
115 Raster Conversion Program 125 Communication Control Program 134 Main Program 135 Update Confirmation Program 136 Update Control Program

Claims (3)

  1. A network communication unit that communicates with the management device using a network management protocol;
    A storage unit for storing the installed firmware;
    In response to the firmware update request received from the management device, it is checked whether the firmware update process can be executed. If the firmware update process can be executed, the update start of the firmware is updated. An update confirmation unit for notifying the management device as a response to the request;
    A firmware update unit that updates the firmware using update data after notifying update start; and
    A digital multifunction machine with
  2. The digital multi-function peripheral according to claim 1,
    The network communication unit
    A setting information storage unit that stores the received setting information when setting information that sets an access method to the storage device that stores the update data is received from the management device;
    Including
    The network communication unit is a digital multi-function peripheral that acquires the update data from the storage device based on the setting information in accordance with an instruction from the firmware update unit.
  3. The digital multi-function peripheral according to claim 1 or 2,
    When the network communication unit receives the firmware version check request from the management device, the network communication unit transmits the firmware version information to the management device.
JP2010048069A 2010-03-04 2010-03-04 Digital composite machine Pending JP2011188019A (en)

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Cited By (4)

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JP2014146098A (en) * 2013-01-28 2014-08-14 Ricoh Co Ltd Information processing system, information processing method, and program
JP2015005041A (en) * 2013-06-19 2015-01-08 株式会社リコー Information processing system, software updating method, and program
JP2016143132A (en) * 2015-01-30 2016-08-08 京セラドキュメントソリューションズ株式会社 Firmware update system
WO2016166799A1 (en) * 2015-04-13 2016-10-20 三菱電機株式会社 Control system and programmable logic controller

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JP2005322033A (en) * 2004-05-10 2005-11-17 Sony Corp Information distribution system, information distribution server, terminal appliance, information distribution method, information reception method, information processing program and storage medium
JP2007080052A (en) * 2005-09-15 2007-03-29 Seiko Epson Corp Update of control software for network device
JP2008015794A (en) * 2006-07-06 2008-01-24 Konica Minolta Business Technologies Inc Program management device, program management system, and program providing method

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Publication number Priority date Publication date Assignee Title
JP2005322033A (en) * 2004-05-10 2005-11-17 Sony Corp Information distribution system, information distribution server, terminal appliance, information distribution method, information reception method, information processing program and storage medium
JP2007080052A (en) * 2005-09-15 2007-03-29 Seiko Epson Corp Update of control software for network device
JP2008015794A (en) * 2006-07-06 2008-01-24 Konica Minolta Business Technologies Inc Program management device, program management system, and program providing method

Cited By (8)

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Publication number Priority date Publication date Assignee Title
JP2014146098A (en) * 2013-01-28 2014-08-14 Ricoh Co Ltd Information processing system, information processing method, and program
JP2015005041A (en) * 2013-06-19 2015-01-08 株式会社リコー Information processing system, software updating method, and program
JP2016143132A (en) * 2015-01-30 2016-08-08 京セラドキュメントソリューションズ株式会社 Firmware update system
WO2016166799A1 (en) * 2015-04-13 2016-10-20 三菱電機株式会社 Control system and programmable logic controller
JPWO2016166799A1 (en) * 2015-04-13 2017-06-29 三菱電機株式会社 Control system and programmable logic controller
KR20170123334A (en) * 2015-04-13 2017-11-07 미쓰비시덴키 가부시키가이샤 Control systems and programmable logic controllers
CN107533490A (en) * 2015-04-13 2018-01-02 三菱电机株式会社 Control system and programmable logic controller (PLC)
KR102005656B1 (en) * 2015-04-13 2019-07-30 미쓰비시덴키 가부시키가이샤 Control systems and programmable logic controllers

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