JP5106058B2 - Printing system for judging abnormality of printing control device and restoring printing device - Google Patents

Description

  The present invention relates to a technique for initializing a printing apparatus and discarding data in the printing apparatus according to an instruction from a printing control apparatus.

  2. Description of the Related Art Conventionally, a printing system is generally composed of a color printer that enables color output, a host computer that controls the printer and generates print data, and a communication interface that connects both of them. An operating system operates on the host computer, and various software programs operate on this operating system. When printing various documents created by the application program, the application program, the printer driver, and the operating system exchange functions to generate a print command by calling functions according to a prescribed procedure. Printing is performed by transferring the generated print command to the printer.

  By the way, the printer driver is called and operated by a spooler process which is a part of the operating system. However, there is a case where this spooler process falls into some abnormal state and ends. Even in such a case, a printing system that can normally perform printing after the spooler process is restored is desired.

  If the spooler process is terminated while the print command is being transferred from the printer driver to the printer, the print data remaining on the host computer is deleted. The printer continues to wait for the remaining print commands after the spooler process is finished. After that, when the spooler process restarts and the next printing starts, it is determined that the remaining print commands of the print job that ended abnormally have been sent, and printing continues. May end up. In such a case, unauthorized printing is performed on the recording medium from the middle.

  Also, if the printer is waiting for or processing the remaining print commands of the previous print job, and if you do not send a print command for the next print job, the previous print job will end abnormally Keeps waiting for the print command transmission of the next print job.

  On the other hand, when the operating system restarts, a reset instruction is issued to the printer. When this reset instruction is received by the printer, the printer discards the print command for the print job being printed and starts the next printing normally. The technique of making it already exists (refer patent document 1).

  According to this technique, when the printer receives a reset instruction during printing, the print job being printed is discarded and the printer is initialized. This prevents unauthorized printing of the next newly issued print job.

Furthermore, by discarding a print job that is being printed, the host computer does not continue to wait for a print command transmission for the next print job.
JP 2001-175436 A

  However, if only the above spooler process running on the host computer is abnormally terminated and only the spooler process is restarted without restarting the operating system, the reset instruction from the host computer is not issued, so the initial printer Can not be done. On the other hand, if the process is such that a reset instruction is issued each time the spooler process is restarted, if the printer is processing a normal print command, a print job that can be completed normally will be discarded by initialization. There was a problem.

  SUMMARY OF THE INVENTION In view of the above-described conventional problems, an object of the present invention is to appropriately determine a printer initialization instruction from a host computer.

In order to solve the above problems, the printing system of the present invention provides:
A printing system for sequentially transmitting print commands from a print control device to a print device, wherein the print device notifies the print control device of information that all print commands have been received, and receives the print command. A print command reception end detection means for detecting an end notification by the print control apparatus, and when the next print job is started after the print command transmission is unexpectedly stopped, the print command reception end is performed. When the detection unit cannot detect the print command reception end notification, the print control apparatus instructs the printing apparatus to perform initialization processing.

  According to the present invention, the following effects can be obtained.

  By applying the first to fourth embodiments described later to the printing system, the next printing after the spooler process is restarted during printing can be started normally.

  In addition, when a second embodiment described later is applied to a printing system, it is possible to take measures only with a host computer, and it is possible to cope with an environment in which a plurality of printing hosts are connected.

  Furthermore, by applying the first to fourth embodiments described later in combination to the printing system, it is possible to issue an initialization instruction to the printer more appropriately.

<Embodiment of the present invention>
An embodiment of the present invention is a printing system that sequentially transmits a print command from a print control apparatus to the print apparatus, and the print apparatus receives a print command reception end notification unit that notifies the print control apparatus of information that has received all the print commands. And a print command reception end detection means for detecting a print command reception end notification by the print control device, and when the next print job is started after the print command transmission is unexpectedly stopped, the print command reception is received. When the end detection unit cannot detect the print command reception end notification, the print control apparatus instructs the printing apparatus to perform initialization processing.

A printing system for sequentially sending print commands from the print control device to the printing device;
The print control device has print start information storage means for storing print start information or printing information in a storage area in the print control device at the start of a print job, and after the print command transmission stops unexpectedly, If the print start information exists in the storage area of the print control apparatus when the print job is started, the print control apparatus instructs the print apparatus to perform initialization processing.

Further, information being printed is managed for each print port in a storage area in the print control apparatus.
The fact that the transmission of the print command has stopped unexpectedly means that the spooler process has ended.
The spooler process is part of the operating system of the print control apparatus.

Also, in a printing system that sequentially sends print commands from the print control device to the printing device,
The printing device has a notification means for notifying the print control device of the elapsed time after the last reception of the print command, and when the next print job is started after the print command transmission stops unexpectedly. The printing control apparatus instructs the printing apparatus to perform initialization processing when the elapsed time has exceeded the specified time.

Also, in a printing system that sequentially sends print commands from the print control device to the printing device,
The printing apparatus has a detecting means for detecting an elapsed time after the last reception of the print command and a notification means for notifying the printing apparatus of an abnormal state of data transmission, after the print command transmission stops unexpectedly. When the detection unit detects that the specified time has passed when the next print job is started, the notification unit notifies the abnormal state to the print control unit, and the print control unit receives the abnormal state from the printing unit. Is received, information about initialization is instructed to the printing apparatus.

Also, in a printing system that sequentially sends print commands from the print control device to the printing device,
The print control apparatus has a transfer means for transferring its own identification information to the printing apparatus. The printing apparatus has a storage means for storing the identification information of the print control apparatus and a notification means for notifying the print control apparatus of the identification information. When the next print job is started after the transmission of the print command has been stopped unexpectedly, the print control device, if the identification information stored in the printing device matches its own identification information, Is instructed to initialize.

<First embodiment>
Hereinafter, a first embodiment of the present invention will be described in detail based on examples shown in the drawings.

[Configuration of printing system]
FIG. 1 is an example of a block diagram showing a configuration of a printing system according to an embodiment of the present invention. The printer 102 is an ink jet printer that forms an image, and is connected to a host computer 100 to be described later via an I / F (interface) 101. The printer 102 forms an image on the recording medium 103 based on the print command generated by the host computer 100. The type of printer is not particularly limited, but here, an ink jet color printer is assumed. In the host computer 100, the application program (application) 116 creates a print job, and the printer driver 112 generates a print command for controlling the printing operation of the connected printer 102 from the spool data of the print job. In this embodiment, a personal computer is used as the host computer 100. It also plays a role of receiving instructions and input from the user regarding print settings. The hardware of the host computer 100 includes various functional blocks 120, 121, 122, 123, and 124. The host computer 100 incorporates an operating system (OS) 110 that is software for controlling the host computer 100, and various functional blocks operate on the OS 110. The OS 110 is assumed to be Windows (registered trademark) XP in the present embodiment, but may be another OS. The communication interface 101 is a communication interface that connects the host computer 100 and the printer 102. In this embodiment, a USB which is a serial interface is used. In addition to this, a serial interface such as IEEE1394, Ethernet (registered trademark), IrDA, IEEE802.11, a power line, or a parallel interface such as Centronics or SCSI is used. You can also. Any interface can be used regardless of wired / wireless as long as communication is realized. As described above, the printing system in the present embodiment is not a single device, but has a configuration in which the host computer 100 and the printer 102 that performs image formation are connected through a specific bidirectional interface. However, the present invention is not limited to this example, and an apparatus-integrated printing system in which the functions of the data processing apparatus and the printer are integrated may be used. Note that functions that are not particularly necessary for describing the features of the present embodiment in the printer 102 and the host computer 100 are omitted.

  The central control unit 120 controls various functions of the host computer 100, and the functions of the CPU correspond to this. The input operation unit 122 includes various input devices for reflecting the user's intention in the print settings. The information notification unit 121 notifies the user of print settings. As a notification method, a case where a display device such as a monitor is used or a voice notification is considered. The I / F control unit 124 manages the interface function of the host computer 100. The storage unit 123 stores instruction codes of the OS 110, the application 116, and the printer driver, and is used to temporarily store and read data when the software operates. The storage unit 123 is configured by a storage medium such as a hard disk drive or a semiconductor memory.

  A print spooler service (spooler process) 111 that manages a print job created by the application 116 operates in the OS 110. The spooler process 111 calls the printer driver 112 to process a print job. The printer driver 112 is software for performing various settings for printing, generation of print data, and printer control on the host computer 100. When the program of the printer driver 112 is executed, functions such as the print setting processing unit 113, the print command generation unit 114, and the language monitor 115 are realized. The print setting processing unit 113 performs various print settings including paper settings and print quality settings. The print setting processing unit 113 has a function of receiving instructions and inputs from the user and displaying or notifying the set contents. The print command generation unit 114 includes a layout processing unit and a print command conversion unit. In the print command generation unit 114, after the number of pages processing and layout processing of the print job created by the application 116 are performed in the layout processing unit, the print data after layout processing is converted into a print command in the print command conversion unit. The print command created by the print command generation unit 114 is sent to the I / F control unit 124 via a data communication processing unit (not shown), and the print command is sent to the printer 102.

  The printer driver 112 also has a function called from the process of the OS 110 other than the spooler process 111 and the application 116, but the description is omitted because it is a function that is not particularly necessary for explaining the features of the present embodiment.

  The print command is received by the I / F control unit 130 of the printer 102 and stored in the storage unit 134 by the central control unit 131. The print commands stored in the storage unit 134 are sequentially read out by the central control unit 131 and converted into print data for forming an image by the command interpretation unit 133. The print data is transferred from the central controller 131 to the printing unit 135 and forms an image on the recording medium 103.

  When the I / F 101 is a bidirectional interface, it is possible not only to send a print command from the host computer 100 but also to receive status information of the printer 102 at the host computer 100.

[Printer Driver Operation]
FIG. 2 is an example of a block diagram conceptually showing the printing system of FIG. 1 centering on the OS print support function and the printer driver in order to explain the embodiment of the printer driver in the present invention. In the printing system in FIG. 2, the print data of each page of the document created by the application 201 is temporarily stored in the pool file 204 through the OS print support function 202. This is converted into a print command interpretable by the printer by the print command generation unit 205 of the printer driver, supplied to the printer 208, and printed.

  When printing an arbitrary document created, the application 201 notifies the OS print support function 202 of print start and print end, and print setting information returned from the user interface module 203 to perform print settings. Notify or notify the start or end of drawing of each page of the document. The OS print support function 202 stores the contents drawn by the application and the print setting information in the spool file 204.

  The print command generation unit 205 receives the data stored in the spool file 204, performs page layout processing and rendering processing based on the print setting information, converts the print command 206 into a print command 206, and outputs the print command 206.

  The print command 206 output by the print command generation unit 206 is sent to the language monitor 207. The language monitor 207 communicates via the I / F 101 to check the status of the printer 208. If the printer 208 is ready to receive print data, the language monitor 207 sequentially transmits the received print commands to the printer 208.

  The status monitor 209 communicates with the language monitor 208 and displays the current printing status to the user. Here, the printing status refers to the presence / absence of an error occurrence status such as a paper no error, the remaining amount of ink, and the number of pages currently being printed.

[Language monitor processing]
FIG. 3 is an example of a flowchart showing the processing of the language monitor in the first embodiment of the present invention. The spooler process calls the language monitor, and the language monitor starts processing in S301. In step S302, it is confirmed whether the printer is already processing another print job. If the language monitor is already processing another print job, it waits until the print job is completed. This is referred to as pre-job completion notice processing. If no other print job is being processed, print commands are sequentially transferred to the printer in S305. When the transmission to the last command is completed, the language monitor ends the process in S306.

A language monitor called from a spooler process operating on the OS of the host computer sequentially transfers print commands to the printer. If the spooler process ends during the transfer of the print command, the print data and the print command held by the spooler process are all erased. Thereafter, when the spooler process is restarted and a new print job is generated, the language monitor attempts to send a print command for the new print job to the printer. However, the language monitor waits for a print command to be sent to the printer in order to perform the previous job completion notice process in S302. On the other hand, the printer is processing the print command of the previous print job and is waiting for the next print command. Therefore, the language monitor needs to issue a reset process to the printer in order to start a new print job.
Therefore, this proposal solves the problem by the following means.

In the previous job notification completion processing in S302, it is confirmed whether the printer is processing another print job. If another print job is being printed, the language monitor confirms whether the printer has received a print end command in S303. If the printer has received the print end command, it determines that the print job already being processed can be completed normally, and the language monitor waits for its own print job. If the printer has not received the print end command, it can be determined that a print job that is already being printed cannot finish the print process. In this case, a reset instruction is issued to the printer in S304.

  When the printer receives a reset instruction, the printer discards the print command held in the storage unit 134 and performs initialization processing such as discharging the recording medium 103. (Hereinafter, this operation is referred to as reset processing). With this processing, the printer is in a state where it can normally process a new print job.

  The language monitor issues a reset instruction in S304, and then performs a print command transmission process in S305. In S306, the language monitor ends the process.

<Second Embodiment>
Hereinafter, a second embodiment of the present invention will be described in detail based on examples shown in the drawings.

  In the first embodiment, it is necessary for the printer to be able to detect that the printer has received the print end command and that the command interpreter has received the print end command. Depending on the configuration of the printer, after receiving a print command, the print command is stored in the storage unit without passing through the command interpretation unit, and processing is sequentially performed from the first received print command. In this case, the printer cannot notify the host computer whether the print end command has already been received.

  The second embodiment is made by omitting this.

  FIG. 4 is an example of a flowchart showing the processing of the language monitor in the second embodiment of the present invention. The spooler process calls the language monitor, and the language monitor starts processing in S401. In step S402, it is confirmed whether the printer is already processing another job. If not, the print start information is stored in the storage unit S409 in step S403. The storage unit S409 is a storage area 123 such as a registry on the host computer, and is not deleted even when the spooler process is restarted. Furthermore, when there are a plurality of print ports in the host computer, it is desirable to manage the print start information stored in the storage unit S409 for each print port.

  In step S404, print commands are sequentially transmitted to the printer by print command transmission processing. When all the print commands have been transmitted, the language monitor deletes the print start information stored in S403 from the storage unit S409 in S405.

  When the spooler process is terminated during the print command transmission process in S404, the print start information in the host remains stored in the storage unit S409. At this time, it can be determined that the printer is also waiting to receive data. Therefore, in the previous job end notification process in S402, if another job is already being processed by the printer, it is confirmed in S407 whether the print start information is still stored in the storage unit S409. If the print start information is not stored, the language monitor waits for processing until the job already being processed by the printer ends normally. If the print start information is stored, the job already being processed by the printer is regarded as being in an abnormal state, and a reset instruction is issued in S408. In response to this reset instruction, the printer performs a reset process.

  When the printer is initialized, the language monitor performs a print command transmission process in S404, and deletes the print start information in S405 after the transmission of the print command is completed. Thereafter, in S406, the language monitor ends the process.

  As described above, according to the second embodiment, it is possible to appropriately issue a reset instruction by processing only on the host computer side.

<Third embodiment>
Hereinafter, a third embodiment of the present invention will be described in detail based on examples shown in the drawings.

  In the second embodiment, there is a problem that a reset instruction cannot be issued to the printer unless printing is started from the print host in which the spooler process is restarted. In a printer capable of printing from a plurality of host computers via a network, after one print host is restarted, printing cannot be started from another print host unless printing is started from that host.

  The third embodiment is made by omitting this.

  FIG. 5 is an example of a flowchart showing the processing of the language monitor in the third embodiment of the present invention.

  The spooler process calls the language monitor, and the language monitor starts processing in S501. In step S502, it is confirmed whether the printer is processing another job. If not, the print command is sequentially transmitted to the printer by a print command transmission process in step S505. If the spooler process is terminated during the print command transmission process in S505, the printer continues to wait for the print command reception.

  Thereafter, when printing is started on another host, the language monitor starts processing in S501 of the host. Thereafter, in S502, it is confirmed whether or not the printer is processing, and if it is being processed, in S503, an elapsed time since the printer last received a print command is acquired from the printer. If the elapsed time is within the specified time, the language monitor waits for processing. If it is outside the elapsed time, it is determined that an abnormal state has occurred in which a subsequent print command is not sent even though printing is in progress, and a reset instruction is issued in S504. In response to this reset instruction, the printer performs a reset process.

  When the printer is initialized, the language monitor performs a print command transmission process in S505, and then the language monitor ends the process in S506.

  As described above, according to the third embodiment, it is possible to appropriately issue a reset instruction even in a network environment.

  In the third embodiment, a description has been given of a mode in which the host performs a time-out determination for comparing the elapsed time after receiving the print command with the specified time. Of course, a timeout may be determined in the printer. In addition, a configuration may be adopted in which a predetermined timeout time (specified time) is held in the host computer or the printer, but a configuration in which it can be changed by operating the printer driver or application of the print host or the printer main body may be used. Further, the time-out time may be automatically set according to the situation of the host computer or printer.

<Fourth embodiment>
Hereinafter, a fourth embodiment of the present invention will be described in detail based on examples shown in the drawings.

  In the first and second embodiments, there is a problem in that reset processing is performed on a printer that normally processes a print job of another print host.

  For example, it is assumed that when the spooling process of the print host 1 is completed during printing by the print host 1, the printer is initialized by the main body operation such as turning off the printer. Thereafter, when the print host 2 is processing the print job 2 and the spooler process of the print host 1 is restarted to start the print job 1, the print host 1 determines that the print job 2 is abnormal printing. End up.

  In the fourth embodiment, this is omitted.

  FIG. 6 is an example of a flowchart showing the processing of the language monitor in the third embodiment of the present invention.

  The spooler process calls the language monitor, and the language monitor starts processing in S601. In step S602, it is confirmed whether the printer is processing another job. If not, the print command is sequentially transmitted to the printer by print command transmission processing in step S604. When all the print commands are transmitted, the language monitor ends the process in S604. If the printer has already processed another print job in S602, the host name of the print job being processed by the printer is acquired from the printer in S605. If the host name of the print job being processed by the printer is different from the host name of the print job that has started printing, the language monitor waits for processing until the print job already being processed by the printer ends normally. If the host name of the print job being processed by the printer is the same as the host name of the print job that has started printing, the job already being processed by the printer is considered to be in an abnormal state, and a reset instruction is issued in S606. In response to this reset instruction, the printer performs a reset process.

  When the printer is initialized, the language monitor performs a print command transmission process in S603, and after the transmission of the print command is completed, the language monitor ends the process in S604.

  As described above, according to the fourth embodiment, it is possible to appropriately issue a reset instruction even in a network environment.

  In the fourth embodiment, an example has been described in which printing is performed from a plurality of host computers via a network. Of course, the present invention is also effective when the printer has a plurality of I / Fs and a print host is connected to each of the printers, or when the printer has a copy function or a print function from a memory card.

1 is a block diagram illustrating an example of a printing system according to an embodiment of the present invention. 1 is a block diagram illustrating an example of a printer driver according to an embodiment of the present invention. The flowchart which shows an example of the operation | movement for issuing the reset instruction | indication of the language monitor concerning 1st embodiment of this invention appropriately The flowchart which shows an example of the operation | movement for issuing the reset instruction | indication of the language monitor concerning 2nd embodiment of this invention appropriately The flowchart which shows an example of the operation | movement for issuing the reset instruction | indication of the language monitor concerning 3rd embodiment of this invention appropriately The flowchart which shows an example of the operation | movement for issuing the reset instruction | indication of the language monitor concerning the 4th Embodiment of this invention appropriately

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Host computer 102 Printer 110 Operating system 112 Printer driver 113 Print setting process part 114 Print command generation part 115 Language monitor

Claims (9)

A printing system for sequentially sending print commands from a print control device to a printing device,
The printing apparatus has a print command reception end notification means for notifying the print control apparatus of information that has received all print commands, and a print command reception end detection means for detecting the print command reception end notification by the print control apparatus. And
When the next print job is started after the print command transmission is unexpectedly stopped, if the print command reception end detection unit cannot detect the print command reception end notification, the print control device performs printing. A printing system characterized by instructing an initialization process to an apparatus. A printing system for sequentially sending print commands from a print control device to a printing device,
The print control device has print start information storage means for storing print start information or printing information in a storage area in the print control device at the start of a print job,
When the next print job is started after transmission of the print command is unexpectedly stopped, if the print start information exists in the storage area of the print control device, the print control device A printing system characterized by instructing a printing apparatus to perform an initialization process. The information being printed is
The printing system according to claim 2, wherein each printing port is managed in the storage area in the printing control apparatus.   3. The printing system according to claim 1, wherein the transmission of the print command is stopped unexpectedly when the spooler process is terminated.   The printing system according to claim 4, wherein the spooler process is part of an operating system of the print control apparatus. In a printing system that sequentially sends print commands from a print control device to a printing device,
The printing apparatus has notification means for notifying the printing control apparatus of an elapsed time after the last reception of a print command;
When the next print job is started after the transmission of the print command is unexpectedly stopped, the print control device is initialized to the printing device if the elapsed time has exceeded a specified time. A printing system characterized by instructing processing. In a printing system that sequentially sends print commands from a print control device to a printing device,
The printing apparatus includes a detection unit that detects an elapsed time after the last reception of a print command, and a notification unit that notifies the printing apparatus of an abnormal state of data transmission.
When the next print job starts after the print command transmission stops unexpectedly,
When the detection means detects that a specified time or more has elapsed, the notification means notifies the print control apparatus of an abnormal state,
A printing system, wherein the printing control apparatus instructs the printing apparatus to perform an initialization process when receiving information indicating an abnormal state from the printing apparatus. In a printing system that sequentially sends print commands from a print control device to a printing device,
The print control apparatus has a transfer means for transferring its identification information to the printing apparatus,
The printing apparatus includes storage means for storing identification information of the print control apparatus, and notification means for notifying the print control apparatus of the identification information;
When the next print job starts after the print command transmission stops unexpectedly,
The printing system, wherein when the identification information stored in the printing apparatus matches its own identification information, the printing control apparatus instructs the printing apparatus to perform an initialization process.   A program capable of causing a print control apparatus to execute the printing system according to claim 1, and a storage medium storing the program.

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