JPS60104944A - Automatic developing machine - Google Patents

Abstract

PURPOSE:To prevent the abnormality of operation and the runaway of a program by backing up a volatile memory in a development controlling microcomputer by a battery and resetting a control/operation means at the drop of power supply voltage. CONSTITUTION:When a power supply voltage monitoring means 28 in a system control auxiliary device 27 detects the drop of the power supply voltage and the output of the means 28 is turned to the L level, a TR31 is turned off and an RAM19 in the control/operation means including a CPU18 for automatic development is connected to the battery 34 and backed up by the battery 34. On the other hand, a low level detecting output from the means 28 is applied to the CPU18 as a reset signal through an inverter 29 and the control/operation means is reset and set up to the initial status, so that the generation of the operation abnormality, program runaway, etc. based upon the drop of the power supply voltage is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an automatic developing machine that automatically performs the processing of developing, fixing, washing, and drying unprocessed film using a microcomputer control system.

(Prior Art) In modern automatic processors, film development, fixing, washing and drying are automatically performed using a microcomputer control system. The microcomputer controls the drive section that transports the film, the amount and temperature control of the film developer, fixer, and cleaning solution, the developer replenishment device, the drying section, and the display section that shows each operating status. There is
In Japanese Patent No. 26242 and Japanese Patent Laid-open No. 126243/1984, an apparatus was proposed in which a microcomputer was used to replenish a photographic processing chamber with developer, fixer, and the like.

By the way, in automatic processing machines that use a microcomputer to control them, if a power outage occurs during film processing, all operations return to their initial state even during film processing, and the display and drive parts Because everything stops, it is easy to forget that the film is being processed even if it remains in the automatic processor. In addition, if a momentary power outage occurs during film processing due to a thunderstorm, etc., a timing shift may occur in the microcomputer, causing an abnormality and runaway, resulting in display system malfunction, drive system malfunction, etc.
Alternatively, there is a problem in which temperature abnormalities occur during developing and drying due to malfunction of the heater.

(Objective of the Invention) This invention was made against the background of the above circumstances, and even if the power supply voltage drops due to a power outage or instantaneous power outage, the contents of the volatile memory are retained and remain unchanged when the power is turned on again. In addition to starting the operation from the state of
It is an object of the present invention to provide an automatic developing machine which applies a reset to a control calculation means to prevent abnormal operation and program runaway.

(Structure of the Invention) In order to achieve the above object, the present invention connects a memory/hitter to the volatile memory of a microcomputer control system, and connects a power supply voltage monitoring means to monitor the power supply voltage to the memory battery. When the power supply voltage monitoring means detects a drop in the power supply voltage, 1) system control for driving the volatile memory in the memory pantry described in 11 above and outputting a reset signal to the control calculation means for initializing program execution; It is characterized by being equipped with auxiliary equipment.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

The automatic developing machine is equipped with a housing L that blocks external light, and the front side of the housing 1 has a supply table 2 for supplying undeveloped film, and the rear side has a collection rack from which processed films L and 3 are taken out. 4 are provided respectively. This automatic developing machine is arranged such that the supply table 2 is located on the dark room side and the collection rack 4 is located on the bright room side.

An operation display section 5 is provided on a portion of the front surface of the housing 1, and the operation display section 5 has several stages of necessary operation switches and indicators.

Moreover, between the film intake port 6 located facing the supply table 2 and the film take-out lower attached to the collection rack 4, that is, inside the housing l, there are a number of feeders driven at a constant speed by a drive device 8. Rollers 9 are provided, thereby forming a meandering film transport path 10. Inside the housing 1, a developer tank 11, a fixer tank 12, a washing tank 13, and a drying device 14 are arranged successively adjacent to each other along the transport path 10 from the front side to the rear side. As a result, the undeveloped film 3 is inserted through the film intake port 6 and is developed until it is taken out from the film take-out lower.

The film intake port 6 is provided with a film width detecting means 15, which detects the film 3, determines the film width, and inputs the information to the microcomputer 16.

A liquid replenishing device 17 for replenishing the developing liquid 4011 or the fixing liquid tank 12 is disposed at the lower part of the housing l.
It is controlled by the microcomputer 16. This microcomputer 16 has 8 CPUs and 1 RAM.
9, ROM 20, input port 21, and output port 22.

A program to control the CPU 18 is written in the non-volatile ROM 20, and the CPU 18 reads necessary external data from the input port 21 or exchanges data with the volatile RAM 19 according to this program. It performs arithmetic processing while doing so, and outputs the processed data to the output port 22 as necessary. The human-powered boat 21 includes the film detection means 15 and the operation display section 5.
Sensors 23 and 24 provided in the developer tank 11, the fixer tank 12, the washing tank 13, and the drying device 14,
, 25, 26 is input.

The control information processed by the microcomputer 16 is outputted from the output port 22 to the drive device 8, drying device 14, and liquid replenishing device 17.

The microcomputer 16 is equipped with a system control auxiliary device 27. This system control auxiliary device 2
7 is constructed as shown in FIG.

The power supply voltage monitoring means 28 monitors whether the power supply voltage Vt is a predetermined value. This power supply voltage monitoring means 28 is
It is connected to the reset input terminal of No. 18 via an inverter 29 and to the base of a transistor 31 via a diode 30. The emitter of transistor 31 is grounded, and the collector is connected to the base of transistor 33 via resistor 32. The RAM voltage v2 is applied to the emitter of this transistor 33, and the collector is connected to the RAM 19. A volatile memory battery 34 is connected between the collector of the transistor 33 and the RAM 19 via a diode 35. CPU18 glue output terminal is ROM2
Connected to 0.

Next, the operation of this system control auxiliary device 27 will be explained.
The power supply voltage Vl is monitored, and when the power supply voltage Vl is above a predetermined voltage, the output is at a high level, and when it is below that, the output is at a low level.

When the power supply voltage Vl is, for example, 5V, the output from the power supply voltage monitoring means 28 is at a high level and the transistor 31 is conductive, which causes the transistor 33 to be conductive. Therefore, the RAM 19 operates with the RAM voltage v2. The high level output from the power supply voltage monitoring means 28 is turned to low level by the inverter 29, and since no reset signal is manually input to the CPU 18, the CPU 18 operates normally.

When the power supply voltage Vl reaches the predetermined voltage due to a power outage or momentary power outage,
For example, when the voltage falls below 4.7V, the output of the power supply voltage monitoring means 28 becomes low level, and the transistor 31 becomes non-conductive. This makes transistor 33 non-conductive and RA
No current flows from the M voltage (2) to the RAM 19, and it operates with the voltage of the memory battery 34, so that the contents are retained as they are in the event of a power outage or instantaneous power outage. Therefore, in this case, if it is in the operating mode, it will remain in the operating mode, and when restarted, the film being processed can continue to be processed.

At the same time, the low level output of the power supply voltage monitoring means 28 becomes high level at the inverter 29, and the CPU
It is input to the reset input terminal No. 18 to apply a reset.

This also resets the ROM 20, preventing program runaway in the event of a momentary power outage, and preventing abnormal operation of the drive device 8, liquid refilling device 17, etc., or abnormal temperature rises during development and drying.

(Effects of the Invention) As described above, this invention detects a drop in the power supply voltage using a power supply voltage monitoring means that monitors the power supply voltage, and drives a volatile memory with a battery to retain its contents. , power outage, or instantaneous power outage occurs, and the film being processed is processed as is and does not remain in the developing machine. At this time, a reset signal that initializes the program execution is output to the control calculation means, which prevents the program from running out of control due to a timing shift in the microcomputer due to a momentary power outage. This prevents temperature fluctuations, etc.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of an automatic processor to which this invention is applied;
The figure is a circuit diagram of the system control auxiliary device. 18...CPU 19...RAM 20...ROM 27...System control auxiliary device 2
8... Power supply voltage monitoring means 34... Battery

Claims (1)

[Claims] In an automatic processor in which the unprocessed film to be inserted is developed, fixed, washed, and dried by a microcomputer control system, a memory battery is connected to the volatile memory of the microcomputer control system, and a memory battery is connected to the volatile memory of the microcomputer control system. A power supply voltage monitoring means for monitoring the power supply voltage is connected, and when the power supply voltage monitoring means detects a drop in the power supply voltage, the volatile memory is driven by the memory battery, and the initial setting for program execution is sent to the control calculation means. An automatic processor equipped with a system control auxiliary device that outputs a reset signal.