JPH032027A - Trend-indicating control device of extrusion molding line - Google Patents

Abstract

PURPOSE:To enable optional indication objects to be trend-indicated on the same screen by a method in which a plurality of indication objects indicated on a trend-monitoring screen is selected, and the indication item relative to the indication object indicated at one time on the basis of this indication object and its measured value are respectively taken in from memory, and then the measured value is trend-indicated. CONSTITUTION:If a plurality of the names of indication objects and indication items are stored in the first memory 101, if the data of trend-setting screen are stored in the second memory 102 and if measured values are stored in the third memory 103, the first indicating control means 105 makes a trend- setting screen as the indication object indicated on a trend-monitoring screen using a plurality of indication object selected with its means 104, and while it is trend-indicated with an indicating means 100, the data of trend-setting picture is stored in the second memory 102. A second indicating control means 106 receives a plurality of indication objects, indication items and measured values from each memory, and they are trend-indicated in the indicating means 100.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a trend display control device for an extrusion molding line, and particularly to a trend display control device for an extrusion molding line that includes an extruder and is used for plastic molding of long objects and laminates. This invention relates to improvement of the target trend display control device.

[Conventional technology]

An extrusion molding line that extrudes and molds long objects such as plastic pipes and laminates such as plastic sheets is composed of two extruders connected to a take-off machine, and the molten plastic raw material is extruded and molded using a screw in the extruder. At the same time, the extrusion molded product is taken up by a taking-off machine.

In such an extrusion molding line, in order to avoid damage to the mechanical system of the extruder or take-off machine and maintain a constant molding quality, the number of rotations of the motor that drives the screw of the extruder, the cylinder part around the screw, etc. It is required to graph display targets such as the temperature of the machine and the pressure of the extruded resin over time, display the change tendency (so-called trend) on a monitor screen, and start up and operate while monitoring.

[Problem to be solved by the invention]

However, in conventional extrusion molding lines, there are generally many things to display, such as the rotational speed of the motor, the temperature of a portion of the screw, and the pressure of the extruded resin.

Therefore, from the viewpoint of accurately operating an extrusion molding line while simultaneously monitoring a plurality of display objects, it has been desired to provide a trend display control device that can display trends of a plurality of display objects at once on one screen.

In addition, even if the measured value from the display target exceeds a predetermined allowable value, that is, becomes an alarm state, from the perspective of monitoring the trends of various measured values on the extrusion molding line, Although it is necessary to display a trend of a plurality of display objects, conventionally, there has been no display device that can display a trend of a plurality of display objects before and after an alarm state, which is inconvenient.

The present invention has been made in view of the above situation, and an object of the present invention is to provide a trend display control device that can display a trend of any display target among a plurality of display targets in an extrusion molding line at once on the same screen.

In addition, the present invention provides a trend display I that is capable of displaying trends of a plurality of display targets before and after the occurrence of an alarm even when a warning situation occurs regarding display targets on an extrusion molding line.
The purpose is to provide I-control equipment.

[Means to solve the problem]

In order to solve such problems, the present invention has two display means 100 and first to
and third storage means 101-103.

Selection means 104 and first and second display control means 10
5,106.

The display means 100 includes a plurality of display target names, each display item related to the display target name, a trend monitor screen that displays measured values related to the plurality of display targets as a trend, and a plurality of display targets to be displayed on this trend monitor screen. This electronically displays a trend setting screen for selecting trends.

The first storage means 101 stores at least the plurality of display target names and display items, and the second storage means 1
02 is for storing the trend setting screen data,
The third storage means 103 stores the plurality of measured values over time, and the first selection means 104 selects a display target name and a display item from the first storage means.

The first display control means 105 creates the trend setting screen with the plurality of display object names and display items selected by the selection means as display objects on the trend monitor screen, and transfers this trend setting screen data to the The information is stored in the storage means 102 of No. 2.

The second display control means 106 includes the second storage means 10
A plurality of display target names and display items to be displayed based on the trend setting screen data from 2 are fetched from the first storage means 101, and measured values related to a plurality of display targets are fetched from the third storage means 103. , the measured values related to the display target are displayed as a trend over time to create a trend monitor screen, which is displayed on the display means 100.

Further, the second display control means 106 creates and displays the same number and different numbers of trend monitor screens to be displayed,
Switching between multiple trend monitor screens that display the same number of the above display targets as trends.

It may be configured to include a switching means 107 that controls switching between a plurality of trend monitor screens that display a different number of display targets as trends.

Further, the second display control means 106 can be configured to display a trend of the measured value to be displayed for a predetermined period of time 9 from the point in time when the measured value to be displayed exceeds an externally set allowable set value. be.

[For production]

In the present invention equipped with such means, the first storage means 1
If a plurality of display target names and display items are stored in 01, trend setting screen data is stored in the second storage means 102, and measured values are stored in the third storage means 103, the first display control means 105 The trend setting screen is created as a display target for displaying the plurality of display targets selected by the selection means 104 on the trend monitor screen, and the display means 1
00, the trend is displayed and the trend setting screen data is stored in the second storage means 102.

Then, the second display control means 106 retrieves the plurality of display objects to be displayed on the trend monitor screen from the second storage means 102 and the display objects and display items to be displayed from the first storage means 101.

A plurality of measured values related to the plurality of display targets are each taken in from the third storage means 103, a trend monitor screen is created, and a trend is displayed on the display means 100 over time.

In addition, in the configuration having the switching means 107, the second display control means 106 controls switching between the trend display monitor screens of the same number of display targets and the trend display monitor screens of a different number of display targets under the control of the switch means 107. Switching between screens is performed.

Further, the second display control means 106 controls the display for a predetermined period from the time when the measured value exceeds the allowable set value.

In a configuration in which trends are displayed, trends before and after the occurrence of an alarm condition are displayed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a schematic diagram showing an example of an extrusion molding line implementing the trend display control device according to the present invention.

In the figure, the extruder 1 has a main screw in the molding machine table 3.
It has a conventionally known configuration including an extrusion motor 5 (not shown) for rotationally driving the extrusion motor 5, a sensor 7 for detecting the rotation speed of the extrusion motor 5, and other configurations. Reference numeral 9 indicates a cable which will be described later.

The molding machine table 3 is equipped with a hopper 11 for supplying plastic raw materials, a raw material feeder device 13 having a sub-screw (not shown), etc., and the raw material feeder device 13 includes a feeder motor that rotationally drives the sub-screw. 15 and a rotation speed detection sensor 17 are arranged.

In the extruder 1, heaters (not shown) and temperature sensors 19a to 19 for temperature measurement are installed in multiple sections in which the cylinder portion around each screw is divided into multiple sections in the extrusion direction.
With e being placed.

Pressure sensor 2 that measures resin pressure at the tip of the die 21
3a is placed.

These extrusion and feeder motors 5 and 15° rotation speed detection sensor 7.1? , temperature sensors 19a to 19e, and pressure sensor 23 are connected to an operation control device 25 including the trend display control device of the present invention by the cable 9 described above.

And extrusion and feeder motors 5, 15, rotation speed detection sensor number 7.1? , temperature sensors 19a to 19e,
Information regarding the pressure sensor 23 is displayed as a trend, and the operation is performed while being monitored by the operation control device 25 to extrude the molded product.

FIG. 3 is a block diagram showing the configuration of a trend display control device according to the present invention.

In the figure, the control circuit 27 includes a CPU 29, which is the main element for achieving the functions described later, a ROM 31 that stores the operating program of the CPU 29, a RAM 33 that temporarily stores data of the calculation process of the CPU 29, and a data input/output memory. The microcomputer is formed with an interface (rlo) 35, etc., and is the main part of a so-called microcomputer.

A keyboard 37 is connected to the control circuit 27.

As shown in FIG. 2, it is formed on the operation surface of the main body of the device, and its functions will be described in detail later.

First to fourth memory circuits 39 connected to the control circuit 27.
41.43.45 and the alarm setting value storage circuit 47 are R
It is an external storage circuit as a storage means consisting of AM, and is used by dividing the storage area.

The first storage circuit 39 stores the layout screen (frame screen) 1 display target name for the trend setting screen and the trend monitor screen, item names related to this display target name, setting values related to the item names, etc. These display objects include, for example, the temperature of a plurality of cylinders, adapters, etc., the number of rotations of a motor, the current of the motor, resin pressure, etc.

The second memory circuit 41 stores trend setting screen data (see Figure 4) for setting multiple display targets for trend display, and the third memory circuit 43 stores alJ fixed value data related to multiple display targets, which will be described later. The data can be stored over time, and the fourth storage circuit 45 can store a plurality of trend monitor screen data, which will be described later.

These first to fourth memory circuits 39, 41, 43, 45 are controlled to store and read data under the control of the control circuit 27, and the third memory circuit 43 is 192,041! It is possible to memorize H measurement values, and there are 8 types (8CH), 4
Measured values of two types (4CH) and two types (2CH) of display objects can be stored. When 8 types (8CH) of display targets are specified, 240 measured values can be stored for each type (ICH), and 480 for 4 types (4CH).

With two types (2CH), 960 measured values can be stored. The sampling period for each measurement value is set on the trend setting screen.

The alarm set value storage circuit 47 is under the control of the control circuit 27.
This is the 11th alarm setting value inputted from the keyboard 37, which stores the range of allowable setting values for each measured value to be displayed, and when the measured value exceeds the alarm setting value, an alarm is generated.

A display device 49 connected to the control circuit 27 is, for example, a plasma display device that displays a trend setting screen, a trend monitor screen, and the like.

Details of these trend setting screens and trend monitor screens will be described later.

The measuring device 51 is the sensor 7.1 of FIG. 2 as a display object.
7.23 and others, converts an analog electrical signal according to the measurement result into a digital signal and outputs it, and is connected to the control circuit 27 to form a measuring means.

The keyboard 37 has functions for inputting instructions to start and stop trend display, inputting settings on a trend setting screen to be described later, and inputting other data to be described later.

The control circuit 27 has the following secondary functions in addition to the control function described above.

In other words, the layout screens related to the trend setting screen and the trend monitor screen stored in advance in the first storage circuit 39 are displayed on the display device 49, and the layout screens related to the trend setting screen and the trend monitor screen are displayed on the display screen of the trend setting screen and the trend monitor screen. Create a trend setting screen and a trend monitor screen by overwriting objects, display items, setting values, trend graphs, etc., and create a second trend setting screen.
The storage circuit 41 has a function of storing a plurality of trend monitor screens into a fourth storage circuit 45.

FIG. 4 shows a trend setting screen created based on data input from the keyboard 37 and displayed on the display device 49.

In the figure, the ``CH'' column in the input CH stage setting column is for setting the number of display targets that can be trended, and the ``Selection'' column is for selecting temperature or analog human input signal (AI).
"0" selects warm i, rlJ selects AI, and "input C"
The HJ column shows the number of each display target type in the "Selection" column, and the "Stop" column is used to select whether or not to stop the trend when an alarm occurs. "1" indicates the trend operation after the alarm occurs. It is intended to stop.

The ``Name'' column displays one display target along with its unit according to the settings made in the ``Selection'' column and the ``Input CH'' column described above, and in Figure 9, cylinders 1 to 4. Adapter 1. Extruder 1.
Current 1. Eight types of resin pressure 1 are displayed.

The "setting value" column in the "display setting" column indicates the display standard for each display object, and 9 normal operation setting values are set therein. The "Range" column is used to set a display range centered around the set value. 2 Usually, the allowable range of the operating set value is set.

The "Screen Frame" column is used to set the number of display pairs to be displayed on one screen of the display device 49.

In the 4CH column, the 1, 2.2CH column teeth are fixedly displayed at 1.2.3.4°.

In the "display position setting" column, the "column" indicates the layout order of display objects to be displayed on the screen.

The rcHJ column is displayed on screens A, B, C, and D on one screen.

The display target to be displayed as a trend in any column of E, F, G, or H is set by the number in the CHJ column of the input CH stage setting column, and one CH can be set multiple times. Yes, the "Name" field is automatically displayed according to the settings in the rCHJ field.

That is, in the "Input CH stage setting field, set the total number of display targets (for example, 8) to display the trend, and also set the display range in the "Display setting" field.

In the "Screen Frame" column and the "Display Position Setting" column, the display configuration for displaying two of the eight display objects or four of the eight display objects on one screen is set.

These settings are controlled by the control circuit 27 and are controlled by the keyboard 3.
The control circuit 27 serves as a selection means when setting a trend as well as a display control means.

The "sample period" column in Figure 4 is the measuring device 51 in Figure 3.
The measured value to be displayed is taken in from the third storage circuit 43.
The "Endless" field is used to set whether or not to display the trend display endlessly, and the "Number of samples after alarm" field is used to enter the number of sample measurements after an alarm occurs. The "Trend Input CH Number" column is used to set the number of trend displays in the "input CH stage setting" described above.

The control circuit 27 captures measured values for the display target set for trend display at each sampling period set based on the trend setting screen data and stores them in the third storage circuit 43 over time, and also displays the trend setting screen data. ``Display settings'' field.

Based on the data in the "Screen frame" column and the "Display position setting" column, the data is processed into a bar graph and is output to the display device 49 over time. Create a trend monitor screen as shown in Figure 6.

It has a function of storing data in the fourth storage circuit 45.

The control circuit 27 thus forms trend display control means.

Further, the control circuit 27 controls when endless selection is made on the trend setting screen.

As shown in Figure 7A, which is a trend display for temperature control, all the trend-set data is read and the specified display target for one screen including the current measurement data is displayed, and if endless is not specified. teeth.

As shown in FIG. B, the third memory circuit 4 is
Data is displayed as a trend until 3 overflows or 1 the trend is forcibly stopped.

Furthermore, the control circuit 27 also has a function of displaying the measured data including the measured data or displaying the oldest data in the third storage circuit 43 on the display device 49 depending on whether the measured data is trending or not.

The control circuit 27 compares the measured value of the display target specified for trend display with the allowable alarm setting value stored in the alarm setting value storage circuit 47, and when the measured value is in an alarm condition, displays the trend setting screen. It also has a function to refer to the alarm setting in , take a set number of samples (for example, 60 times) as shown in FIG.

In addition, when stopping the trend display, if endless is specified, the trend display operation will continue until there is an instruction to forcibly end the alarm generation state, and if endless is not set.

The trend display operation continues until the capacity of the third storage circuit 43 is exceeded or until a trend end instruction is forcibly given.

The control circuit 27 also controls the trend monitor screen.
Each half of the screen has a screen movement control function on the left and right sides.

In other words, 2. For example, in the trend display, the display screen is arranged in the time axis direction as a, b, c, and d as shown in Fig. 8A.

Divided into 8 parts e, f, g, h, 2+1li of a-h
Assuming that one screen is formed by each I, the key operation indicated by the mark -2 mark on the trend monitor screen (actually the operation on the keyboard 37) will change the screen by 1/2, such as 1, 1, 2, etc. By moving the screen left and right, it is possible to observe trends displayed over time.

Also, by operating the secondary screen key, as shown in Figure 9,
It is possible to switch from 4 trend displays A-D to the next 4 trend displays E-H, and also 2 trend displays A, B, and C.

E and F, G and H can be switched sequentially.

Further, the control circuit 27 has a function of being able to switch from two trend display states to four trend display states, as shown in FIG. When moving from the four trend display state to the two trend display state, the screen is controlled in advance to move to the screen set by "1" or "3" in the "2CHJ" column of the trend setting screen.

In this way, the control circuit 27 functions together with the keyboard 37 as a switching means.

11 and 12 are flowcharts for explaining the operation according to the present invention described above. FIG. 11 shows the trend preparation processing operation for the set display target, and FIG. 12 shows the trend display operation. be.

When the trend starts in Figure 11, step 2
00, the trend setting data, that is, the trend setting screen is referenced, and the specified display target type and number of trends (
CH) Other setting items are imported.

In the following step 201, all measured values for the display target for which the trend has been set are stored in the third storage circuit 43, and in step 202 it is determined whether or not there is an endless display.

If step 202 is No because endless is not set on the trend setting screen, the process moves to step 203 and it is determined whether or not the third storage circuit 43 is overflowing, and if YES, the trend ends. NO
In this case, the process moves to step 200.

If endless is set on the trend setting screen and YES in step 202, the process moves to step 204, and in step 204 it is determined whether or not there is an alarm setting on the trend setting screen.If the answer is NO, the process returns to step 200 and YES is selected. In this case, in step 205, the measured value after the alarm setting is read.

In the following step 206, it is determined whether or not the alarm is occurring. If NO, the process returns to step 200, and if YES, the alarm occurring state is maintained in the subsequent step 207.

In step 208, it is determined whether or not a predetermined measurement period has ended after the alarm has been generated. If NO, the process returns to step 200, and if YES, the trend ends.

Therefore, if it is not set to endless.

The trend ends due to the overflow of the third storage circuit 43. If endless is set, trend processing is performed until the predetermined number of samples after the alarm setting is reached, and then ends. This completes the preparation for trend display.

When the trend display in Figure 12 starts, step 3
00, the number of items displayed on the trend setting screen is 2 (
It is determined whether there are 1MI or 4 pieces, and in the case of 4fIla, a fixed frame display (layout screen display) for 4 pieces is displayed on the display device 49 in step 301, and the process moves to step 303.
In the case of f11, two fixed frames (layout screen display) are displayed on the display device 49 in step 302, and the process also proceeds to step 303.

In step 303, it is determined whether or not the trend is currently in progress. If YES, in step 304, all data set for the trend is read, one screen is displayed so that the current measurement data is displayed, and the trend is displayed. finish.

If step 303 is No, all data set as a trend is imported in step 306, and step 30 continues.
At step 7, one screen worth of data is displayed starting from the oldest data stored, and the process ends.

〔Effect of the invention〕

As explained above, the screen display control device of the present invention selects a plurality of display objects to be displayed on a trend monitor screen from among a plurality of display objects to create a trend setting screen,
Based on the multiple display targets on this trend setting screen, the display items related to the display targets to be displayed at once and the measured values related to these display items are each imported from the storage means, and the measured values of the multiple display targets are trended over time. Since the trend monitor screen is displayed on the display means, it is possible to display the trends of any of the plurality of display objects regarding the extrusion molding line at once on the same screen.

In addition, in a configuration having a switching means, trends can be displayed for a large number of display targets with a simple switching operation, and the trend display for the same number of display targets and the trend display monitor screen for different types of display targets can be switched. Switching is also easy.

Furthermore, if the trend display control means is configured to display the trend for a predetermined period from the point at which the measured value to be displayed exceeds the allowable set value, the trend before and after the occurrence of the alarm condition can be displayed, and even when the alarm condition occurs, the extrusion line can be maintained. It is possible to understand the trends of various measured values, which contributes to analysis and response.

[Brief explanation of the drawing]

FIG. 1 is a claim correspondence diagram corresponding to the claims of the present invention, FIG. 2 is a schematic diagram showing an example of an extrusion molding line including an operation control device, and FIG. 3 is a trend display control device according to the present invention. FIG. 4 is a block diagram showing an example of the display target, and FIG. 5 and FIG. 6 are diagrams showing the trend monitor screen for the display target set in FIG. Figure 6 shows 4 display screens), 7th
The figure is a diagram for explaining the start/stop of trend display and the trend display after an alarm is generated, and FIGS. 8 to 10 are diagrams for explaining switching modes of the trend monitor screen. 11 and 12 are flowcharts illustrating the present invention in detail. 1......Extruder 3...
・・・・・・・・・・・・・・・Molding machine stand 5.15・
...Motor 7.17.19a-19e, 23...Sensor 13...
・・・・・・・・・・・・・・・ Raw material feeder device 2
5・・・・・・・・・・・・・・・・Operation control device 27・・・・・・・・・・・・・・・・・・Control circuit 3
7・・・・・・・・・・・・・・・ Keyboard 3
9......First memory circuit 41...Second memory circuit 43.・・・・・・・・・・・・・・・・・・3rd
Memory circuit 45・・・・・・・・・・・・・・・
Fourth memory circuit 47...
...Alarm set value storage circuit 49...
...Display device 51........
...Measuring device 100...
... Display means 101 ...... First storage means 102 ... Second storage means 103 ... ......Third storage means 104... Selection means 105... -First display control means 106......Second
Display control means O 7... Switching means Patent distributor Rika Kogyo Co., Ltd. Agent

Claims (3)

[Claims] (1) A screen display control device that controls trend display of a plurality of display objects in an extrusion molding line, the screen display control device controlling the trend display of a plurality of display objects in an extrusion molding line, the display object name, each display item related to the display object name, the plurality of display objects. display means for electronically displaying a trend monitor screen displaying the measured values as a trend; and a trend setting screen for selecting a plurality of display targets to be displayed on the trend monitor screen; a first storage means for storing items; a second storage means for storing the trend setting screen data; a third storage means for storing the plurality of measured values as measurement time elapses; a selection means for selecting the display target name and display item from the storage means; creating the trend setting screen with the plurality of display target names and display items selected by the selection means as display targets on both sides of the trend monitor; a first display control means for storing the trend setting screen data in the second storage means; and a plurality of display target names and display items to be displayed based on the trend setting screen data from the second storage means. The measured values of the plurality of display targets are fetched from the first storage means and the measured values of the plurality of display targets are fetched from the third memory means, and the measured values of the plurality of display targets are displayed as a trend over time to display the trend monitor screen. make,
A trend display control device for an extrusion molding line, comprising: second display control means for displaying information on the display means. (2) The second display control means is for creating and displaying the same number and different numbers of trend monitor screens for the display targets, and for switching between the plurality of trend monitor screens displaying the same number of display targets as trends. , a trend display control device for an extrusion molding line, comprising a switching means for controlling switching between a plurality of trend monitor screens displaying trends of a different number of display targets. (3) The second display control means displays a trend of the plurality of display objects for a predetermined period from the point in time when the measured value of the display object exceeds an externally set permissible setting value. 2. The screen display control device for an extrusion molding line according to 2.