JPS5934551A - Controller for copying machine - Google Patents

Abstract

PURPOSE:To shorten a repair time, by providing a means for storage until a control part finishes copying operation, and storing abnormality in the storage means to hold it together with the last contents when the abnormality is detected by various sensors in a copying machine. CONSTITUTION:Copy modes are stored in specified areas of an NVM9, respectively. Signals from the various sensors are also stored in the NVM9, whose storage contents are held until the operation ends. If a fault occurs in a control system after the operation starts and a CPU6 decides the abnormality on the basis of the signals from the sensors 14, a state code signal is outputted. Consequently, the control part 12 stops the operation and the last status code signal is held together with the storage contents of the NVM9, displaying the abnormality on segments of a display part 4. When the power source is turned off after the occurrence of the abnormal state, the storage contents are held as well because the NVM9 is backed up by batteries, so the storage contents of the NVM9 are read prior to repair to grasp the state of the fault accurately, thereby shortening the repair time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a copying machine that can accurately identify the cause of a failure in a copying machine and shorten repair time.

As a conventional control device for a copying machine, for example, a control unit (for example,
Some devices are equipped with a microcomputer (consisting of a microcomputer).

In the above configuration, when the sensor detects a failure in the copying machine, the control unit selects a status code according to the type of failure, stores the code in RAM, and displays a display corresponding to the code on the console to notify the operator. can notify you of a malfunction.

However, in conventional copier control devices, when the user turns off the power after a failure occurs, the status code stored in the RAM is erased, so service personnel must inspect the inside of the copier to determine the cause of the problem. Therefore, there was a problem that the repair time was increased.

The present invention has been made in view of the above, and in order to accurately identify the cause of a failure in a copying machine and shorten repair time, the control unit changes the state corresponding to the copying operation of the copying machine to the state when the copying operation is completed. A control device for a copying machine is provided with a means for storing the abnormality until the abnormality is detected based on status signals from various sensors in the copying machine, and the storage means stores the abnormality and holds it together with the stored contents. It is on offer.

Hereinafter, a copying machine control device according to the present invention will be explained in detail.

FIG. 1 shows one embodiment of the present invention, in which a control device for a copying machine includes a console 5 consisting of a group of operation switches such as a numeric keypad 1, a start switch 2, a copy size selection switch 3, etc., and a display section 4, a CPU 6, a ROM 7, RAM 8, N
VM (non-volatile memory) 9, input interface 10,
The controller 12 includes a microcontroller including an output interface 11 and the like. The control unit 12 receives various operation command signals such as a copy size selection signal from the console 5 and a copy operation start signal, and status signals from various sensors 14 such as a temperature sensor installed in the fixing unit 13 through an input signal line 15 or 16, performs predetermined processing, and outputs a control signal to various controlled objects 20 such as the console 5, the heater of the fixing section 13, the paper feed roller of the paper feed section 19, etc. via the signal line 17 or 18. It is designed to output to . The NVM 9 in the control unit 12 is configured with a RAM using a known battery pack, and has an area for storing an operation command signal (indicating a copy mode) during a copy operation and a status code signal in the event of a failure, for example, as shown in FIG. In addition, an operation designation signal is provided in area (2), status signals from various sensors are provided in area (2), and a status code signal at the time of failure is provided in area (2), etc., which are predetermined in advance.

In the above configuration, the Sycobee operation will be explained with reference to the flowchart shown in FIG.

Operation command signals corresponding to the copy mode selected prior to operating the start switch 2 of the console 5, that is, the selection of copy size, setting of the number of copies, copy reduction ratio, whether or not to use a sorter, etc. Each is stored in a specified area. Once the set copy mode is changed, the changed contents are stored in the NVM 9. Further, status signals from various sensors are also stored in a predetermined area of the NVM 9. These stored contents of the NVM 9 are stored until the end of the copy operation, and each time a new copy operation is started, the contents are updated to the Nocobee mode and status signal at that time.

After the copy operation has started, if a failure occurs in the control system of the copying machine and the CPU 6 determines that there is an abnormality based on the status signals from the various sensors 14, the CPU 6 outputs a status code signal (this code signal is also sent to the NVM 9). stored).

Accordingly, the control unit 12 stops the copy operation and N′v
A status code signal indicating an abnormal state from the CPU 6 is held together with the memory contents of M9, and the abnormality is displayed using the segments of the display section 4. Even if the user of the copying machine turns off the power of the copying machine after an abnormal condition occurs, the NVM 9 is of a battery back type, so its stored contents are retained. Therefore, the service personnel who have been contacted can accurately grasp the location of the failure, the state of the failure, etc. by reading the storage contents of the NVM 9 prior to repair.

Similarly, the present invention does not limit the display form on the display unit 4 when an abnormality occurs, but as explained in the above embodiment,
It may be a display that simply indicates an abnormal condition, or it may indicate the location of the failure,
The failure state etc. may be clearly displayed. Further, a method other than displaying the occurrence of an abnormality on the display unit 4, such as a buzzer sounding method, may be used. In this case, the service personnel may read the stored contents of the NVM 9 on a separately prepared display and grasp the failure location, failure state, etc.

According to the above-described control device for a copying machine according to the present invention, the control device for a copying machine according to the present invention includes means for storing a state corresponding to a copying operation of the copying machine until the copying operation is completed, and the state signal is sent from various sensors in the copying machine. When an abnormality is detected based on the above, the storage means memorizes the abnormality and retains it together with the stored contents, so that Service J can accurately grasp the cause and location of the failure of the copying machine. , it is possible to realize a reduction in repair time.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of an apparatus showing an embodiment of the present invention. Figure 2 is a diagram explaining the contents of N''VM in the control section in Figure 1. 9.
The figure is a flowchart explaining the operation of the first device. Explanation of symbols 1...Numeric keypad, 2...Start switch,
3...Copy size selection switch, 4...Display section, 5...Console, 6...CPU,
7...ROM. 8...RAM, 9...NVM, 10...
・Input interface, 11... Output interface, 12... Control unit, 13... Fixing unit, 1
4...Various sensors, 15.16...Input signal line, 17.18...Output signal line, 19...Paper feed section, 20...Each controlled object.

Claims (1)

[Scope of Claims] A copying machine including a control unit that controls a copy operation based on an operation command signal input from a console and status signals from various sensors, wherein the control unit controls a state corresponding to the copy operation. A copier for a copying machine, comprising means for storing until a copying operation is completed, and when an abnormality is detected based on the status signal, the storage means stores the abnormality and holds it together with the stored contents. Control device.