JPS5934550A - Controller for copying machine - Google Patents

Abstract

PURPOSE:To confirm speedily whether an inspected equipment is normal or not by detecting and displaying the normalcy of a program. CONSTITUTION:A self-test of hardware is taken every time a power source is turned on and the inspection of the addition of an ROM63 and a writing/reading check on an RAM65 are carried out; the RAM65 is all cleared to ''0'' after the check. When a diagnostic mode is specified with the ten-key 4 of a console 2, display diodes of the console 2 all turn on and the test result of the self-test is displayed on a display part 5; when the result is abnormal, ''U6'' is displayed and when normal, the program is normal, so the time of a software timer for flashing a copy density display part 11 is set on the basis of the result.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a copying machine that detects and displays the normality of a program to improve the speed of confirming normality or abnormality during maintenance inspection.

As a control device for a copying machine, for example, there is a copying machine control microcomputer (hereinafter referred to as a "microcomputer") provided in an electronic copying machine to control the operation of the electronic copying machine. This microcomputer inputs a ROM that stores a control program that controls the operation of the electronic copying machine, signals for commanding operations, sensor signals from various parts of the electronic copying machine, etc., performs calculations based on the control program, and calculates the results. A CPU that generates control signals to control operations based on the data, a RAM that temporarily stores the calculation results and various data, and a RAM that stores data that is desired to be non-volatile, such as the cumulative number of copies. It is equipped with NVM (non-volatile memory).

According to this copying machine control microcomputer, when an operation is commanded from the console of the electronic copying machine, the CPU processes signals based on a control program corresponding to the operation in the ROM, and outputs a control signal corresponding to the operation. Controls the operation of the electronic copying machine.

However, with this copying machine control microcomputer, when performing maintenance and inspection of an electronic copying machine using a diagnostic program,
Since it is not possible to confirm the normality of the diagnostic program itself, it is not possible to immediately confirm whether the diagnostic program is normal or abnormal even if maintenance inspection results are obtained.

The present invention has been made in view of the above, and is a control for a copying machine that detects and displays the normality of a program in order to quickly confirm whether the equipment is normal or abnormal during maintenance inspection. It provides equipment.

The copying machine control device of the present invention will be explained in detail below.

FIG. 1 shows an embodiment of the present invention, in which a console 2 of a copying machine 1 includes a start key 3, a numeric keypad 4, a display section 5 (for displaying the number of copies and the number of sets), and a copy density display section 11. is provided. The copying machine 1 is controlled by a microcomputer 6 (control signal is output via signal bus 9.10). The microcomputer 6 includes an input interface 61 for inputting the operation signals and sensor signals into the microcomputer via a signal bus 7.8, a ROM 63 for storing a program for processing the input signals, and a ROM 63 for storing a program for processing the input signals.
A CPU 64 that processes input signals based on a program stored in the OM 63, a RAM 65 that temporarily stores the results processed by the CPU 64 and various data, and a copy accumulation based on the signal processing results of the CPU 64. It has an NVM (non-volatile memory) 62 that stores non-volatile data such as the number of sheets, and an output interface 19 that outputs control signals based on the signal processing results in the CPU 64 to the signal bus 9-10.

In the above configuration, the operation will be explained based on the flowchart of FIG. 2. Each time the power is turned on, a self-hardware check (self-test) is performed. The self-
The test includes an addition check on the ROM 63 and a write/read check on the RAM 65. When the self-test is completed, the RAM 65 is all cleared to "0".

Next, specify the diagnostic mode using the numeric keypad 4 of the console 2 (or you may turn on "0" on the numeric keypad 4 when the power is turned on). All of the light indicator diodes of the console 2 (except the display section 5) are lit, and the test results of the self-test are displayed on the display section 5. That is, when the test result is defective, "U6" is displayed. On the other hand, R.O.
If the result of the addition check of M63 is good, it means that there is no abnormality in the program, and the blinking soft timer time of the copy density display section 11 (for example, 500
milliseconds) is set. Lighting based on this set time,
The blinking continues until a test code representing a diagnostic item is keyed in from the numeric keypad 4. This allows you to check the normality of the program.

As described above, according to the copying machine control device according to the present invention, the normality of the program is detected and displayed, and the normality or abnormality of the equipment can be quickly confirmed during maintenance inspection. Gade key.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the present invention. Explanation of symbols 1...Copy machine, 2...Console, 6...
Microcomputer (control unit). Patent applicant Fuji Xerox Co., Ltd. Agent Patent attorney Shin Matsubara 2

Claims (1)

[Scope of Claims] A device comprising a control unit having a memory storing a program for controlling operations, and a display unit that displays a display according to the operation when the control unit issues a display command, wherein the control unit: A control device for a copying machine, characterized in that when a diagnosis mode is instructed, the normality of the program in the memory is checked and the result is displayed on the display section.