JPS63245506A - Input/output signal storing and reproducing display device for various manufacturing machines - Google Patents

Abstract

PURPOSE:To accurately clear up the cause of abnormality by using a storage device, where the input/output signal of each operation process can be stored, to store the input/output signal and stopping storage to reproduce and display stored input/output data at the time of the occurrence of abnormality. CONSTITUTION:The state of the input/output signal of an injection molding machine detected by an input/output device 1, a CPU 5, or the like is always stored in a storage device 4 only in a prescribed number of cycles in the order of operation process, and this storage is stopped at the time of the occurrence of abnormality. When an operator selects a picture of input/output signal reproducing and display by the button operation of an input board 8 and designation of a reproducing cycle and the reproducing process are performed, stored input/ output data before the occurrence of abnormality and input/output data at the time of the occurrence of abnormality are displayed on a CRT 6. Since input/output data for the occurrence of abnormality in a certain process and that for normalcy in the same process are objectively compared and examined, the cause of abnormality is cleared up without the reproducing operation and even the cause of unreproducible abnormality is cleared up.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to input/output signals applied to process control plants such as injection molding machines, dry cleaners, press machines, guicast machines, machine tools, and film manufacturing plants. The present invention relates to storage and playback display devices.

(Conventional technology) Hereinafter, an injection molding machine will be explained as a typical example.

Conventionally, in the event that some kind of abnormality occurs during machine operation, the injection molding machine is once controlled to a safe state and then stopped, and the injection molding machine is not stopped in the abnormal state. For this reason, investigating the cause of the abnormality has relied on a method of estimating the cause from the state at the time of the abnormality occurrence and confirming it by performing a reproduction operation.

(Problems to be Solved by the Invention) This method of investigating the cause has the following problems.

(1) Time is required to reproduce the operation.

(2) If the cause of the abnormality is not reproducible, it is difficult to investigate the cause.

(3) As estimating the cause of the abnormality relies on the memory or records of the operator at the production site, ambiguous memories or mistakes in copying data may lead to the wrong direction in investigating the cause, which takes a lot of time. Sometimes.

The present invention was made to solve these problems.
The aim is to provide a device that can accurately investigate the cause of an abnormality without lingering in a person's memory.

(Means for Solving the Problems) Therefore, the present invention provides a storage device that has a plurality of operation steps in one cycle and stores input/output signals for each operation step, and an input/output signal stored in the storage device. In various manufacturing machines equipped with a reproducing display device for reproducing and displaying output data, the storage device repeatedly stores a prescribed cycle, and when an abnormality occurs, stops storing the input/output signals at the time of the abnormality occurrence. The reproducing and displaying device is configured to be able to reproduce and display the input/output data for each of the operating steps, and this is used as a means for solving the above problem.

(Function) A storage device that can store input/output signals for each operation process of an injection molding machine, etc. for a specified number of cycles is used to constantly store a certain amount of input/output signals, and when an abnormality occurs, the storage is stopped and stored. The input/output data obtained is reproduced and displayed on a suitable display device such as a CRT or a liquid crystal display device. Therefore, it is possible to accurately investigate the cause of the abnormality without having to perform a reproduction operation again as in the conventional case, and furthermore, the effort and time required to investigate the cause are reduced.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a control device in an injection molding machine. In the figure, l is an input/output device installed in the machine body (hereinafter referred to as the machine) such as an injection molding machine, which is equipped with various detection terminals such as pressure and temperature, as well as actuators that operate hydraulic cylinders, heater power, etc. be. Reference numeral 2 denotes a panel control section that connects the operator and the machine, and is connected to the input/output device 1, which is the machine control section, through a control input/output device 3. Also,
The panel control unit 2 includes the control input/output device 3, the storage device 4,
It is composed of a CPU 5, a CRT 6, a printer 7, and an input keyboard 8, and the storage device 4 stores predetermined execution programs and various data such as set values, actual measured values, calculated values, and abnormality information. The CRT6 is a device that displays information necessary for machine operation and abnormality alarms in the form of letters, numbers, charts, graphs, etc.

The printer 7 records the necessary data on recording paper.

Further, the input keyboard 8 is a device through which the operator sets data necessary for operating the machine.

The CPU 5 performs calculations, judgments, commands, etc. in order for each component of the panel control section 2 to perform predetermined functions, and executes control of the entire panel control section.

FIG. 2, FIG. 3, and FIG. 4 show display examples in this embodiment. First, FIGS. 2 and 3 are reproductions of input and output signals stored during mold clamping process numbers 7 and 8 during normal operation. FIG. 4 is a reproduction display of input/output signals when an abnormality occurs in the same process number in the next cycle of FIG. 2.

Next, to describe its function, input/output device 1, CPU
The states of the input/output signals of the injection molding machine detected in the steps 5 and the like are always stored in the storage device 4 for a specified number of cycles in the order of the operating steps, and storage is stopped when an abnormality occurs.

The operator selects the input/output signal regeneration display screen by operating a button (not shown) on the input keyboard 8, and at the same time designates the regeneration cycle (based on the number of shots, the memorized input/output data before the occurrence of the error and the input/output data at the time of the occurrence of the error) are selected. Is displayed.

FIGS. 2 and 3 are reproductions of input and output signals stored during mold clamping process numbers C07 and CO8 during normal operation as described above. From both figures, process number CO8 is C.
The input signal [II] is known for O7. This difference indicates a difference in the operation process on the mold clamping side. Next, FIG. 4 is a reproduction of input/output signals when an abnormality occurs in the next cycle and process number of FIG. 2. From the figure, a comparison with normal operation or a comparison with a timing chart is displayed.

FIG. 5 shows a flowchart of input/output signal storage.

(1) Monitoring of normality/abnormality is performed at all times, and when an abnormality occurs, storage of input/output signals is stopped.

(2) Check for changes in the process during normal times.

(3) If there is no change in the process, return to the normal/abnormal check loop.

(4) If there is a change in the process, the process number is further checked, and if it is a process other than the first process, the input/output signal at that time is stored in the storage area corresponding to the process number, and a normal/abnormal check loop is created. Return to

(5) When the process number is the Oth process, it is further checked whether the number of storage cycles has reached the specified number, and if it is within the specified number, the storage area for each cycle is advanced to the next cycle, and the storage area at that point is The input/output signal is stored in the storage area corresponding to the process number, and the process returns to the normal/abnormal check loop.

(6) If the process number is the Oth process and the number of storage cycles reaches the specified number, set the storage area to the initial cycle, store the input/output signal at that time in the storage area corresponding to the process number,
Return to normal/abnormal check loop.

FIG. 6 shows how input/output signals are stored according to this flowchart. However, in FIG. 6, the number of steps is compressed to simplify the cylinder. (Illustration of the input/output data storage device for the injection side process is omitted.) It will be clear from the following description that the present invention is not limited to the above embodiment.

(1) Although the above embodiment describes an example using a CRT device, various display devices such as a liquid crystal display device, a fluorescent display device, a plasma display device, an LED display device, etc. can be applied as the display device. It is.

(2) Display items and display methods of input/output signals are not limited to those of this embodiment.

(3) The number of input/output signals to be displayed is determined by the capacity of the control device used.

(4) In some cases, data may be recorded directly on a printer without using a display.

(5) The abnormality cause R8 determined from the comparison between FIG. 2 and FIG. 4 described above may be displayed on the screen of FIG. 4 as the abnormality cause by blinking or the like.

(Effects of the Invention) As explained above in detail (according to the present invention, input/output data when an abnormality occurs in a manufacturing process and input/output data during normal operation of the same process can be objectively compared and examined, In addition to being able to investigate the cause of an abnormality without having to do so, it also becomes possible to investigate the cause of an abnormality that is not reproducible.

[Brief explanation of drawings]

The figures are all related to the present invention; FIG. 1 is a block diagram thereof; FIGS. 2, 3, and 4 are input/output signal reproduction display diagrams using a CRT for explaining an embodiment of the present invention;
FIG. 5 is a flowchart of input/output signal storage in the storage device of the present invention, and FIG. 6 is an explanatory diagram showing the storage state of input/output signals according to the flowchart of FIG. Explanation of main parts of the diagram 1.--Input/output equipment 2-.Panel control section 3.
-Control input/output device 4-・Storage device 5-CPU (
Central processing unit) 6--CRT (display device) 7--Printer 8--Personal keyboard Figure 1

Claims (1)

[Claims] In various manufacturing machines that have a plurality of operation steps in one cycle and are equipped with a storage device that stores input/output signals for each operation step, and a reproduction display device that reproduces and displays the input/output data stored in the storage device. , the storage device repeatedly stores prescribed cycles, and when an abnormality occurs, stops storing the input/output signals at the time of the abnormality occurrence, and the reproducing display device reproduces the input/output data for each of the operation steps. A storage and playback display device for input/output signals in various manufacturing machines, which is capable of displaying input/output signals.