JPS62288903A - Computer controller on production process line - Google Patents

Abstract

PURPOSE:To perform an accurate simulation test which is most suitable for the operating state of a production line by outputting a simulation process signal equivalent to a process signal and a simulation interruption signal and using the processing process length of the production process line, the present time, and the processing elapse as key information to generate a processing schedule. CONSTITUTION:Every certain amount of a molten steel poured into a tundish 1 is flowed into a mold 2 on the continuous casting line, and a cast billet is cooled by a cooler 3 and is drawn down by a pinch roll 5. It is cut by cutting machine 6 in accordance with a set value from a computer system 20 and is carried by a carrying machine 7. The computer system 20 takes process signals from the tundish 1, the mold 2, the cooler 3, etc., into an input/output subsystem 12 through an input/output device 11. A control part 14 outputs a drawing speed, the quantity of cooling water, the cut timing, etc., based on these signals. A processing part 18 manages the order, the classification, the size, etc., of the steel to be cast. A process signal generating part 13 inputs the simulation signal equivalent to the process signal to the subsystem 12.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a computer control device for various manufacturing process lines, and particularly to a computer control device suitable for a continuous casting line.

[Conventional technology]

In the continuous casting line, various equipment (processing equipment) such as a casting device, a cutting device, a steel billet delivery device, etc. are arranged to form a series of production lines. Each process device in a continuous casting line is controlled by a process control computer for casting and cutting control.

Export control and tracking of manufactured steel billets are performed, and comprehensive control is performed according to a series of process treatment schedules.

Generally, there are four types of process signals from each process processing device that are input to a process control computer: analog signals, digital signals, pulse signals, and interrupt signals. These process signals are input to the process control computer while having an organic relationship with each other depending on the operating status of each step in the process. The process control computer monitors and controls the process while comprehensively determining the operating status of the process based on these process signals.

On the other hand, in order to make the above control accurate, a simulation test of a process control computer is required. The most important point in this simulation test is whether a simulated process signal equivalent to an actual process signal is input to the process control computer.

Conventionally, analog signals, digital signals, and pulse signals among the above-mentioned process signal types have been simulated, but no consideration has been given to simulated input of interrupt signals. In addition, in the simulated input of each process signal, the timing of starting the simulated input is the startup timing of the process data generation device, and thereafter, analog signals are input in a specific pattern, and digital input is turned on and off at regular intervals. Since OFF repetition and pulse input are input with a constant count value, it is possible to maintain the correlation between process signals according to the series of movements of each step of the process required in simulation tests of process control computers. No consideration is given to simulated input to the process control computer.

As a conventional process computer control device, JP-A-58-
One disclosed in Japanese Patent No. 163012 is known.

(Problems to be Solved by the Invention) The above-mentioned conventional technology inputs simulated interrupt signals to a process control computer while maintaining the relationship between the simulated input of the interrupt signal and the amount of process signals corresponding to a series of movements of each step of the process. No consideration has been given to this point, making it unsuitable for simulation testing of process control computers.

An object of the present invention is to provide a computer control device that is most suitable for the operating state of the process of the manufacturing process line and can perform an accurate simulation test when performing a simulation test on a process control computer of a manufacturing process line. With the goal.

[Means for solving problems]

In order to achieve the above object, the present invention provides a manufacturing process line in which products are continuously produced from raw materials through a plurality of process process apparatuses each arranged at a fixed position to form a series of manufacturing lines. A computer control device that controls each of the process processing devices based on each of the process signals from the computer, comprising: a simulated process signal generating device that generates a simulated process signal and a simulated interrupt signal equivalent to each of the process signals; a schedule creation unit that creates a processing schedule that matches the progress state of the process steps based on the process length, current time, and process elapsed time of the manufacturing process line as key information. That is.

[Effect]

According to the above configuration of the present invention, the simulated process signal generation device outputs a simulated process signal and a simulated interrupt signal that are equivalent to the actual process signal required for the simulation test, and the schedule creation unit outputs a simulated process signal and a simulated interrupt signal that are equivalent to the actual process signal required for the simulation test, , create the generation order of the above-mentioned simulated process signals (i.e., process processing schedule) using the current time and processing elapsed time as key information, and incorporate it into computer processing to perform a simulation test that matches the series of movements of the manufacturing process line. be able to.

〔Example〕

Next, embodiments according to the present invention will be described based on the drawings.

jujube! First, an overview of computer control according to the present invention will be explained.

Process signals are captured in the continuous casting line control computer by an input/output subsystem that captures them into an input/output table via an input/output device. Therefore,
In order to perform simulated input of process signals, a process signal generator that generates simulated data is provided inside the control computer, and the simulated data generated by the process large signal generator is
A simulated signal can be input by storing it at the corresponding address in the input/output table.

In order to input simulated interrupt signals, in addition to the data address and bit position of the input/output table corresponding to each interrupt signal, the interrupt number (hereinafter referred to as No) is stored in a table in the process signal generator, and the simulated When a signal is input, the data address and bit position corresponding to the interrupt signal are referred to, the data is stored in the corresponding location of the input/output table, and the input/output subsystem is activated using the interrupt number as a factor. As a result, the input/output subsystem detects the interrupt signal input, refers to the input/output data table to determine the simulated interrupt signal input this time, and activates the application program for the corresponding interrupt signal to generate the interrupt signal. simulated input is achieved.

Furthermore, in order to simulate the generation order of process signals in accordance with a series of movements of the continuous casting line, key information for controlling the generation timing of each signal is required. Usually, in a computer system for controlling a continuous casting line, the casting length of a slab is used as key information for tracking the slab and controlling each piece of equipment. Further, the elapsed time from the time when a certain point of the cast slab passes through a certain equipment position of the continuous casting line is also used as key information. In addition, the operation schedule used inside the continuous casting line control computer is generally transmitted from the host computer to the control computer, and the key information for the operation schedule is:
In addition to the above two pieces of key information, the current time is used. Therefore, the generation of the simulated input according to the series of movements of the continuous imitation line is based on three key information: casting length 9 time and elapsed time.

This can be achieved by managing the generation timing of the simulated signal within the process signal generation device.

A more specific explanation is as follows.

Information regarding process signals necessary for the process signal generation device to input a simulated signal is defined in a table for each signal within the process signal generation device. In order to perform a simulated input of an interrupt signal, if the data address, bit position, and interrupt calm of the input/output data table for each interrupt signal are defined, the simulated input can be generated. When a simulated interrupt signal is input, the process signal generator refers to the data address and bit position of the input/output data table corresponding to the defined interrupt signal, stores the data in the corresponding location of the input/output table, and performs the input/output operation. The output subsystem is activated due to an interrupt storm. The subsequent operation of the input/output subsystem is as described above.

In the table that defines the process signal information, key information necessary for the process signal generator to manage the simulated input timing of each signal is also defined. When the key information is "casting length (processing process length)", the casting length is defined as the timing at which the simulated input is generated. When the key information is "time", the computer internal time is defined as the timing for generating the simulated input. When the key information is "elapsed time", the elapsed time from the time when the process signal generator starts the simulated human power is defined as the timing for generating the simulated input. The process signal generator periodically determines the defined key information, and if the key information is "casting length", the current casting length is equal to or exceeds the defined casting length. In this case, perform a simulated input of the corresponding signal.

When the key information is "time", if the current internal time of the computer is equal to or exceeds the defined time, a corresponding signal is simulated inputted. If the key information is "elapsed time", if the elapsed time from the time when the process signal generation device started the simulated input to the present is equal to or exceeds the defined elapsed time, the corresponding signal will be simulated input. . As described above, the process signal generator performs simulated input of process signals while periodically determining the key information of the table in which information for each process signal is defined.

Thereby, the order in which simulated inputs of process signals are generated is managed.

An overview of the operation of a continuous casting system in which the continuous casting line 19 is monitored and controlled by a computer system 20 will be explained with reference to FIG. The molten steel poured into the tundish 1 shown in FIG. 1 is poured into a mold 2 in fixed amounts. The slab 5 that has come out of the mold 2 is cooled and solidified by the spray from the cooling device 3, and is pulled down by pinch rolls 4. Then, it is cut by the cutting machine 6 according to the setting values from the computer system 20, and is transported to a designated location by the transporting machine 7.

Reference numeral 33 indicates a detector for the steel piece 5, and 34 indicates a cutting origin.

System 20 In FIG. 1, a computer system 20 includes tanditions 1. Mold 2. Process signals from the cooling device 3 and the like are taken into the input/output subsystem 12 via the input/output device 11 . Based on the captured process signals, the casting control unit 14 first controls the pinch roll 4 to control the drawing speed and the cooling device 3.
Outputs set values such as the amount of cooling water. The cutting control unit 15 outputs the scheduled cutting length and cutting timing to the cutting machine 6. The conveyance control unit 16 outputs the conveyance destination of the slab 5 to the conveyance machine 7. The casting pretreatment section 17 manages the state of the continuous casting line 19 before starting casting. The schedule processing unit 18 manages the order of two types of steel to be cast and the sizes. The process signal generating device 13 for the continuous casting line control computer generates a simulated process signal (hereinafter referred to as a simulated signal) equivalent to the above process signal and inputs it to the input/output subsystem 12 .

Reference numeral 8 indicates a CRT, 9 a storage device, and 10 an operator console.

Process No. Main Device 13 FIG. 2 shows the configuration of the process signal generator 13 for the continuous casting line control computer. This process signal generator 13
is broadly divided into a simulator section 36 that generates simulated signals.
and a simulation table section 35 in which basic data necessary for generating a simulated signal is stored in advance.

Further, the simulator section 36 is configured to run the equipment simulator 28.
．． Casting length simulator 29. analog simulator 30
．． It is divided into 27 CRT man-machines. The equipment simulator 28 is the casting pretreatment section 17 of the continuous casting system 21. In the conveyance control section 16, the casting length simulator 29 is connected to the cutting control section 15.
．． The analog simulator 30 generates a simulated signal for the casting control section 14 . The CRT man-machine 27 sets data to the simulation table section 35 and starts and interrupts the simulator section 36.

Used for restart instructions, etc.

The simulation table unit 35 includes the schedule table 22. Index table 23. Master table 24
．． Casting length table 25. It consists of an analog table 26, details of which are shown in FIGS. 3 to 7. The microphone table 24 is set with the basic pattern Nα of the simulated signal to be generated, the task N0 of each simulator, and the like. The casting length table 25 is mainly used by the casting length simulator 29, and equipment constants of the continuous casting line 19 (cutting origin position, etc.) and basic data of generated simulated signals (PH1-8 data addresses, etc.) are set. The index table 23 stores the basic information of the simulated signals generated by the equipment simulator 28 as signal 1.
One case is provided for each point, and the schedule table 22 manages the order in which these simulated signals are generated using case numbers. The analog table 26 is used by the analog simulator 30 and has basic information of the simulated signal for each input point Ha, one case at a time.

On the other hand, the details of the table on the continuous casting system 21 side are shown in Figure 8~
It is shown in FIG. The input/output data table 31 is a table in which process signals input to the input/output device 11 are first stored, and has areas for all input/output points. Further, this input/output data table 31 has information regarding interrupt inputs, and has a configuration as shown in FIG. 10. In the system mode table 32, each mode on the continuous casting system 21 side is set.

Next, detailed functions of each simulator will be explained.

CRT man machine 27 The processing flow of the CRT man-machine 27 is shown in FIG.

The two main processes are casting length, equipment simulator startup (block 105), and data writing process (block 109). The processing and usage method will be explained below along with the actual execution of siminilation.

When executing a simulation, basic information for generating each simulated signal is stored in advance in the simulation table section 36.
It is necessary to set it to . To do this, first, the simulation screen display key among the function keys of the operator console 10 is pressed to perform initial display processing (block 101) of the simulation screen 37 in FIG. 38.

This simulation screen 37 includes the function Nα input 1i
II38. Table Nα input field 39. There is a case Nα input field 40 and a table data input field 41. For example, the third
As illustrated in Figure 8, 5. 1 on the table
．． 1 for table data. If O, O~0 is input, table data values are set in the master table 24 by data write processing (block 109 in FIG. 11). Note that the case Na input field 40 is based on the index table 2.
Input only when setting data to 3. This is because the amount of data in the index table 23 is large and it is not possible to display the input fields for all the table data on one screen.When setting data on the index table 23, the case Nα input field 40 is Cases Nn are input, and table data is input for each case Nα. After all the necessary basic information is set in the simulation table section 35 through the above processing, the next step is to start up the simulator section 36.

To start the simulator section 36, enter the function Nα input field 3.
If NQ (=1) to start the simulation is inputted in block 8, the casting length simulator 29 and the equipment simulator 29 are activated in block 105, and the simulation is started. Note that the analog simulator 30 is configured such that a casting length simulator 29 is activated.

Other processing includes setting the suspend flag (block 106).
) and a suspend flag set (block 107). This means that when 2 or 3 is entered in the function Nα input field 38, the simulation status interruption flag in the mask table 24 of FIG. 3 is set to 0N (=1.).

In the OFF (=O) processing, each simulator constantly monitors this flag, and when it detects ON, it stops generating the simulated signal, and when it detects OFF, it resumes generating the simulated signal. The table data display process (block 108) includes:
This is used to confirm the basic information set in the simulation table section 35, and the function Nα input field 38 (=4), similar to the data writing process (block 109),
If you enter values to display the target table in the table Nα input field 39 (target table Nα) and case Nα input field 40 (enter only when displaying data in the index table 23), the current data of the target table will be displayed. It is displayed in the table data input field 41. The cycle display process (block 102) is started by a cycle timer set in the casting length simulator. For example, the table data display process (block 108) displays the casting length table 25.
is displayed, the latest table data at the time of startup will be displayed, and you can see how the total casting length etc. are increasing.

゛ Simulator 29 The casting length simulator 29 has a simulation start process and a synchronization process.

FIG. 12 shows the processing flow of simulation start processing in the casting length simulator 29. In the simulation start process, the casting length simulator 29
It operates when started from the RT man machine 27 and equipment simulator 28.

The casting length simulator 29 started from the CRT man-machine 27 determines the contents of the system mode in the system mode table 32 shown in FIG. 9 (block 200).

Since simulation cannot be performed when the system mode is online mode (=0), an alarm indicating that the system mode is online mode is output to the simulation screen 37 shown in FIG. 30 (block 207); Therefore, the operator needs to set the system mode to simulation mode before starting the simulation. If the system mode is simulation mode (=1), the subsequent processing continues.

The casting length simulator 29 then uses the interrupt information in the input/output data table 31 shown in FIG.

The contents of the interrupt input mode are determined (block B). If the interrupt input mode corresponding to all interrupt input points Nu from the interrupt input point Nnl to the maximum value of the interrupt input point Nα is simulation mode or reserve (=1), the subsequent processing can be continued because simulation can be performed. do. If the interrupt input mode is the actual input mode for one or more points, there is a possibility that there will be a conflict between the online interrupt signal input and the interrupt signal simulated input by the process data generator 13, so simulation cannot be performed and an alarm will be generated. is output (block 207). Therefore, the operator must set the interrupt input mode to the simulation mode before starting the simulation.

If the determination result of blocks 200 and 201 indicates that the cylinder is to be simulated, the casting length simulator 29 turns on the simulation cylinder flag in the simulation status of the master table 24 shown in FIG.
block 202).

The casting length simulator 29 then determines the equipment simulator schedule completion flag among the simulation statuses in the master table 24 shown in FIG. 3 (block 203). If the schedule completion flag is on,
Continue the subsequent processing. If the schedule completion flag is off, the process is terminated and waits for the casting length simulator 29 to be activated after the equipment simulator 28 turns on the schedule completion flag. At the timing when the equipment simulator 28 starts the casting length simulator 29, the equipment simulator 28 has already turned on the schedule completion flag, and the subsequent processing is continued based on the determination in block 203.

Next, the casting length simulator 29 sets initial values in the master table 24 shown in FIG. 3 and the casting length table 25 shown in FIG. It is set in the master table 24 shown in the figure (block 205). Then, a periodic task is set based on the information of the casting length simulator period time/task Nα, the equipment simulator period time/task Nα, the simulation screen display update period, and the CRT man-machine task N0 in the mask table 24 shown in FIG. block 206).

FIG. 13 shows a processing flow of periodic processing in the casting length simulator 29. The periodic process operates when the casting length simulator 29 is activated by a periodic timer.

FIG. 14 shows the periodic processing shown in FIG. 13.

This figure shows a detailed flow of the simulation necessity determination process of block 400.

In FIG. 14, the casting length simulator 29 refers to the casting length simulation required flag among the simulation modes of the casting length table 25 shown in FIG. 4, and determines whether or not casting length simulation is necessary (block 400). As a result of the determination, if the casting length simulation is necessary, the subsequent processing is continued, and if not, only the activation of the analog simulator 30 in block 305 in FIG. 13 is executed.

Next, the casting length simulator refers to the casting length simulating flag in the simulation status of the casting length table 25 shown in FIG. 4, and determines whether casting length simulation is currently being performed (block 401). . If the casting length is being simulated, the process moves to block 404, and if it is not being simulated, the subsequent processes are continued.

Next, the system mode table 32 shown in FIG.
In this case, among the simulation statuses of the casting length table 25 shown in FIG. 4, the casting length simulating status is turned on (block 403). If pouring is not in progress, only the activation of the analog simulation in block 305 in FIG. 13 is performed.

Next, in the simulation status of the master table 24 shown in FIG. 3, a flag indicating that the simulation is being interrupted is determined (block 404), and if the simulation is being interrupted, the process is terminated. If the simulation is continuing, the process moves to block 301 in FIG. 13.

Block 30 in FIG. 13 is a process for grasping the current casting length information. FIG. 15 shows a detailed flow of the processing of block 301 in FIG. 13.

In Figure 15, the information to be collected includes the tip position (
block 500), slab rear end position W (block 501),
If the total casting length (block 502) and the cutting simulation required status is ON in the simulation mode of the casting length table 25 shown in FIG. 4 (block 503), the uncut bottom position (block 504) is also collected.

FIG. 16 shows the meaning of each piece of information collected in the process of FIG. 14, in which (a) shows the state during casting, and (b) shows the state after the completion of casting. The slab tip position LBT refers to the length from the casting length reference point in the mold 2 to the bottommost position of the slab.

The slab rear end position LTP is the length from the casting length reference point to the topmost position of the slab after completion of casting. Total casting length L
SUM is the length from the casting length reference point to the bottommost position during casting, and is the length from the bottommost position to the topmost position after finishing casting. Uncut bottom position L NC
UT refers to the length from the cutting origin to the uncut bottom position.

Block 302 in FIG. 13 is for interrupting/stopping the casting length simulation.

FIG. 17 shows a detailed flow of the interruption process of the interruption/stopping process of block 302 shown in FIG. The casting length simulation can be interrupted in two ways: by specifying the interruption position in advance, and by setting the interruption arbitrarily using the CRT man-machine 27.

In block 600 of FIG. 17, the casting length simulator 29 determines whether it is currently suspended or set to suspend. This is done by transparently illuminating the simulation suspension flag in the simulation status of the mask table 24 shown in FIG.

If the simulation suspension flag is on, the suspension time is determined in block 602 to determine whether the simulation is currently suspended or whether suspension has been set. This is done by determining whether the simulation interruption time in the mask table 24 shown in FIG. 3 is the initial value or whether the actual time is stored.

If the interruption time is the actual time, the process is terminated because it is already being interrupted. If the interruption time is the initial value, indicating that the interruption setting has been made by the CRT man-machine, in block 607 the current computer internal time is saved as the interruption time to the simulation interruption time in the mask table 24, and in block 608 The application program of the continuous casting system and other simulation programs of the process signal generator are placed in a dormant state. At this time, the CRT man-machine program 27 is not placed in a dormant state because it is necessary to perform restart settings.

If the simulation interruption flag is off in block 600, it is determined in block 601 whether the simulation is currently not being interrupted or whether the CRT man-machine 27 has set the simulation to restart. If the simulation interruption time in the master table 24 is the initial value, the process moves to block 605 because the simulation is not currently being interrupted. If the simulation interruption time is the real time, this indicates that the restart setting has been made by the CRT man-machine 27. In block 603, the simulation interruption time in the mask table 24 is set as the computer internal time, and the simulation interruption time in the master table 24 is set. Replace with the initial value. Further, in block 604, the application program of the continuous casting system and other simulation programs of the process signal generator are released from the dormant state.

At block 605, the casting length simulator 29 determines whether the current total casting length has reached the designated interruption position.

This is done by comparing the total casting length in the casting length table 25 shown in FIG. 4 with the designated simulation interruption position. Here, the total casting length is the block 502 in FIG.
The simulation interruption designated position is information set in advance by the operator.

If the total casting length is equal to or exceeds the specified simulation interruption position, the simulation interruption flag in the simulation status of the mask table 24 shown in FIG.
7 and 608 are executed. If the total casting length has not reached the designated simulation interruption position, the process is interrupted.

FIG. 18 shows the processing flow of the stop processing of the casting length simulation interruption/stop processing of block 302 in FIG. 13. Stopping casting length simulation is the same as interrupting, and there is a method to specify the stop position in advance and a CRT
There are two methods for arbitrarily setting the stop using the man-machine 27.

In block 700 of FIG. 18, the casting length simulator 29 determines whether the rear end position of the slab has reached the designated stop position. This is done by comparing the rear end position of the slab in the casting length table 25 shown in FIG. 4 with the designated simulation stop position.

Here, the slab rear end position is the information collected in block 501 of FIG. 15, and the simulation stop designated position is information set in advance by the operator.

If the rear end position of the casting length is equal to or exceeds the designated simulation stop position, the third
The simulation status flags of the mask table 24 shown in the figure and the simulation status of the casting length table 25 shown in FIG. 4 are reset, and the cycle timer is canceled in block C.

Also, when the casting length simulator 29 is activated from the CRT man-machine by the operator's stop setting from the simulation screen 37 shown in FIG. 32, it executes the processes of blocks 701 and 703 in FIG. 18.

Block 303 in FIG. 13 is a process for determining the next advancement length of the slab. FIG. 19 shows the detailed flow of block 303 in FIG. 13.

In block 800 of FIG. 19, the casting length simulator determines the periodic mode in order to calculate a reference slab advance length. This is done by referring to the casting speed synchronization designation flag in the simulation mode of the casting length table 25 shown in FIG.

If casting length speed synchronization is specified, the casting length simulator 29 calculates the standard expected slab advance length in block 801 by the following calculation.

LBAsI! =1000XV+60XTXK-(1
) Here, as the casting speed simulation value, the simulated analog value of the corresponding case of the analog table of FIG. 7 indicated by the casting speed analog table case Na of the casting length table 25 of FIG. 4 is used. Further, the casting length simulation cycle time T uses the casting length simulator cycle time of the master table 24 in FIG. 3, and the casting speed multiplier coefficient is as follows:
The casting speed magnification coefficient of the casting length table 25 in FIG. 4 is used. It is assumed that the casting length simulation cycle time T and the casting speed magnification coefficient are set in advance by the operator.

If the casting speed synchronization is not specified in FIG. 19, then in block 802, the expected standard slab advance length is determined by the following calculation.

Here, as the standard casting length Q, the standard casting length of the casting length table 25 in FIG. 4 is used. It is assumed that the standard casting length Q is set in advance by the operator.

The planned length of the next slab advancement is determined by taking into account the designated interruption position and the planned cutting length. If there is an interruption designation in block 803 of FIG. 19, the expected length to reach the interruption designated position is calculated in block 804. Here, the determination of the presence or absence of interruption specification is made using the master table 24 in FIG.
This is done by referring to the simulation suspension flag in the simulation status, and the expected length to reach the designated suspension position is calculated using the following formula.

ΔLS=L! l^■r - (Lsus+LBASF) Here, when ΔLs<O, it means that the total casting length will exceed the specified interruption position next time.

Next, if cutting simulation is specified in block 804 of FIG. 19, the expected length to be reached up to the expected cutting length is calculated in block 806. here,
The determination of whether cutting simulation is specified or not is made by referring to the cutting simulation required flag in the simulation mode of the casting length table 25 in FIG.
The expected length ΔLc to reach the expected cutting length is calculated using the following formula.

ΔLc = LCUT − (LNOUT + LBASB
) Here, when ΔLc<O, it means that the uncut bottom position will exceed the scheduled cutting length next time.

In block 807 of FIG. 19, the casting length simulator 29 determines the next slab advance length L CUNT based on the above-mentioned expected length ΔLs to reach the specified interruption position and expected length ΔLc to reach the scheduled cutting position.

FIG. 20 shows a method for determining the next slab advancement length L0UNT. Basically, when the standard slab advance length L BASE is poured from the current casting length, the specified interruption position LWAIT or the planned cutting length L OUT is reached.
If the length exceeds L CUNT, the next slab advance length L CUNT is determined depending on the one that is reached earlier.

For example, in the case of ΔLs<O, ΔLc<O in Fig. 20, (
1) Under the condition of ΔLs≦ΔLc, it is faster to reach the specified interruption position Lw^IT, so the next slab engagement length LcUNT is the total casting length LB from the specified interruption position LWAIT.
The value is obtained by subtracting UM. As a result, the next total casting length L
SUM is specified as interruption II L lol! It will match T. In the manner described above, the next slab advancement amount is determined while taking into account the specified interruption position 11LwAtt and the planned cutting length L CUT.

Block 304 in FIG. 13 is a process for performing a simulated input of a casting length pulse signal, and FIG.
The detailed flow of block 304 in the figure is shown.

In block 900 of FIG. 21, the casting length simulator 29 converts the next slab advance length determined in block 807 of FIG. 25 into a pulse value using the following calculation formula.

ΔL sat =L 0UNT÷α Here, the pulse rate correction coefficient α uses the value stored in the casting length table shown in FIG. 4. A continuous casting line may be equipped with multiple roll equipment, in which case the casting length pulse is input to the continuous casting system from each roll equipment. Therefore, the casting length table 25 has pulse rate correction coefficients α corresponding to the number of roll equipment. It is assumed that the number of roll equipment, the pulse rate correction coefficient α, and the position of each roll equipment in the continuous casting line are set in advance by the operator.

In block 901 of FIG. 21, the casting length simulator 29 determines the counter set value of the current casting length pulse.

LssT (n) = LSET (n-1) + ΔL sp
THere, the previous casting length pulse counter set value LsE
For r(n), the value stored in the casting length table 25 in FIG. 4 is used. Note that the current casting length pulse counter set value L HET (n) obtained by calculation is stored in the previous counter set value of the casting length table 25.

Block 902 in FIG. 21 is a process for performing a simulated input of the current casting length pulse counter set value Lser(n). This is the casting length table 25 in Fig. 4.
This is done by referring to the data address in the input/output data table for the roll equipment defined in .

FIG. 22 shows a method of calculating the pulse counter set value of each roll equipment. Assuming that the current casting length pulse counter set value LspT(n) obtained in Fig. 21 is the pulse counter set value for the roll equipment located at the most upstream side of the continuous casting line, the pulse counter set value for each roll equipment is as follows. It is determined by a calculation formula.

R1gEt=LsaT(n) RIser= (R1sBTXαR1=LR amount)÷α1
In block 305 of FIG. 13, casting length simulator 29 periodically activates analog simulator 30.

Simulator The equipment simulator 28 can be broadly divided into a scheduling process at initial startup and an equipment data generation process for periodic startup.

FIG. 23 shows the processing flow of the scheduling process.

The scheduling process is performed by entering 1 in the function Nα input field 38 on the simulation screen (Fig. 32) of the CRT man-machine 27.
By inputting , it will be activated only once at the start of the simulation. The purpose of the scheduling process is to set the cases Ha of the index table 23 in the schedule table 22 used in the facility data generation process described below in the order in which the facility data is generated. The process begins by checking whether or not to simulate equipment data in this simulation (block 100).
In step 1), if the simulation status of the schedule table 22 is 0, it is determined that the simulation status is necessary, and if it is 1, it is determined that it is unnecessary. Next, the schedule table 22 is cleared to O except for the simulated status.

Next, scheduling is performed for each mode, and scheduling for mode 1 (block 1003) is performed.
FIG. 24 shows a scheduling processing method using as an example. First, the pattern positive in the mask table 24 is compared with the pattern Ha of each case in the index table 23, and a case Nα with the same pattern Nα and one mode Nα is extracted. Next, compare the key information (the time is set in mode 1) in these extracted cases.
Schedule table 22 for cases Nα in order of earliest time
It will be stored in . Here, the key information represents the timing of data generation, and the earlier the time, the earlier the timing of generation. Similarly, for modes 2 and 3, scheduling is performed in order of elapsed time of key information in mode 2 and in order of casting length of key information in mode 3, and cases Nα are stored in the schedule table 22.

When scheduling for each mode is completed as described above, scheduling completion processing (block 1006)
, turn on the equipment simulator schedule completion flag in the simulation status of the master table 24 (=
1) After that, the casting length simulator 29 is activated and the scheduling process of the equipment simulator 28 is completed.

FIG. 25 shows the processing flow of equipment data generation processing. The equipment data generation process is activated at regular intervals by a timer set by the casting length simulator 29, and generates a simulated signal of the equipment data.

In the process, first, in the interruption determination (block 2001), the simulation interruption flag of the simulation status of the mask table 24 is determined, and if it is ON (=1), the following processing (blocks 2002 to 2006) is not performed. This flag is displayed on the CRT man-machine 27 simulation screen (3rd
The function is turned on by inputting 2 in the function Nα input field 38 in FIG. 2).

Next, key point passage detection and equipment data generation processing in each mode will be explained. First, key point passage detection will be explained using mode 1 as an example. Cases Nα of equipment data that occur in mode 1 are set in the mode 1 area of the schedule table 22 in the order of occurrence by the above-described scheduling process. This case number indicates the case Nα of the index table 23, and one case represents 1 case.
It has basic information of two pieces of equipment data (key information indicating timing of occurrence, function line indicating data type of baldness, etc.). Therefore, key point passage detection in mode 1 is
The key information (time) and the current time are compared from the first case Nα for mode 1 of the schedule table 22, and the 26th
Judgment is made based on the key point passage detection criteria shown in the figure. In other words, in mode 1.

If the current time has passed the time of the key information, a key point passage is detected. Similarly, in modes 2 and 3, in mode 2, the elapsed time calculated from the current time and the simulation start time in the master table 24 is compared with the elapsed time in the key information, and in mode 3, the total casting length in the casting length table 25 is compared. (The latest total casting length is cented every cycle by the casting bottle simulator) and compared with the casting length of the key information.

Case No. where key point passing was detected by the above process
performs generation processing of equipment data. The generation process is the same for each mode, but there are differences between cases and it is divided into two types. It is determined by the function Nα of each case in the index table 23, and when the function is 1, a digital simulation is performed, and when the interrupt machine rate 1 function N11 is 2, an analog human power simulation is performed.

In the case of digital and interrupt input simulation generation processing, the input/output data table 31 is
Determine the target bit Nα in .

When the simulation data is 1, set the bit to 0N (=1),
When it is 0, the bit is turned OFF (=O). Furthermore, interrupt N
When α is other than O, it is regarded as an interrupt input, and at the same time as the bit is set, the input/output subsystem 12 is activated using the interrupt as an activation factor, and an interrupt is generated.

On the other hand, in the case of analog input simulation, the analog simulated signal is directly generated by the analog simulator 30 described below, and the equipment simulator generates the basic information used in the analog simulator at the timing of key point passage detection. The method is to change the generation pattern of analog data. In other words, the analog table 26 has one case of basic information for each input point, and the case Ha in the analog table 26 is determined from the input point Nα of the target case in the index table 23. Then, the basic information (simulated MAX value, simulated MIN value, simulated analog value, simulated fluctuation amount) of the corresponding case Nα is rewritten in the index stave with the information in 23. Equipment data generation processing in each mode is performed as described above.

Note that the schedule table 22. once the equipment data has been generated. Case Nu is cleared to 0 in order to avoid data generation processing again. If all the cases Nα in the schedule table 22 become O in this way, then
For example, if the simulation is determined to be completed (block 2005),
As simulation completion processing (block 2006), a timer that periodically activates the equipment simulator is reset.

Analog Simulator 30 The analog simulator 30 is activated by the casting length simulator 29 at regular intervals and generates simulated signals such as casting speed and tundish weight. The basic information of the generated data is set in the analog cheaple 26 shown in FIG. 7, one case for each input point. However, only the simulated analog value is updated every cycle with generated data.

FIG. 27 shows the processing flow of the analog simulator 3o. The main flow of the process is to generate simulated data for one analog input point from block 3000 to block 3003, and repeat this process for the number of analog input points to generate simulated data for all analog input points. . First, check whether simulation is necessary (block 300
0), the simulation mode of the analog table 26 is determined, and when the mode is O, no simulated data is generated for the analog input point. When generating simulated data, next step is analog data generation (block 3).
001). This is shown in detail in FIG. 28, and as can be seen from this FIG.
The next day is determined by the simulation mode of the analog table 26.

When the simulation mode is 1, it is a holding mode, and the simulated analog values in the analog table 26 are used as they are, and simulated data with the same value is generated every cycle. Note that the simulated analog values are calculated by the CRT man-machine 27 before the simulation starts.
This is set as basic information.

When the simulation mode is 2, it is a variation mode, and simulated data is generated from the simulated MAX value, simulated MIN value, and simulated variation amount of the analog table 26. FIG. 29 shows the generation pattern of simulated data. As shown in Fig. 29, the value obtained by adding the simulated variation amount to the simulated analog value every cycle is used as the simulated data, and when the simulated MAX value is exceeded,
The simulated MAX value is used as simulated data, and the simulated variation amount is subtracted from the next time. When the simulated MIN value is exceeded, the opposite process is performed. In the manner described above, a triangular wave-like simulated data generation pattern is realized.

When the simulation mode is 3, it is a synchronous mode, in which simulated data is generated based on the target set values and synchronization coefficients of the analog table 26, and the continuous casting system 21 generates simulated data corresponding to the target set values output to the continuous casting line 19. Generate data. For example, the pinch roll 4 is controlled by the casting control 14.
When a target setting value of the drawing speed is outputted, simulated data is generated so that the actual drawing speed becomes a value corresponding to this target setting value.

The calculation formula for determining the simulated data value is shown below.

(Simulated data) = (SETD-8IMD)XSDOK
+SIMD Here, the simulated analog value SIMD is the simulated data of the previous cycle, and after the current simulated data is generated, the current simulated data becomes the simulated analog value. The occurrence pattern is shown in FIG. For example, the target set value 5ETD is constant at 100, and the previous simulation data is 50. Synchronization coefficient 5DOK
is 0.5, the current simulated data will be 75, and the next cycle will be 87.5. In addition, the synchronization coefficient is 5DO
K is a value between O and 1, and if it is set to 1, the same value can be generated for the target set value 5ETD. In addition, the target set value 5
The ETD is set in the analog table 26 for each target setting value output by an application built-in subroutine of the continuous casting system 21.

Although the simulated data generated as described above is an engineering value, it is necessary to set it as a digit value in the input/output data table 31, so the engineering value-digit conversion (27th
Figure block 3002) is performed. This is the maximum value of the analog table 26 range.

Convert using the following formula based on the minimum value of the range.

DIG = (Range maximum value) - (Range minimum value) ADS
= (simulated data) - (minimum range value) DI G Finally, the converted simulated data is set in the input/output data table 31 by digit value setting processing (block 3003 in FIG. 33). At this time, the location to set is determined from the data address of the analog table 26.

The details of the generation of simulated data by the three simulators have been described above, and FIG. 31 schematically shows what kind of simulated data these simulators actually generate to simulate the continuous casting line 19.

FIG. 31 shows that after the basic information of each simulator has been set in the simulation table section 35 by the CRT man-machine 27, the simulator is started, and the initial processing of the simulator, that is, the scheduling processing of the equipment simulator 28, etc. is completed. It starts from the state of

Time advances from right to left with the casting length, at the right end the casting length is Om. In other words, since casting has not yet started at this time, the casting length simulator 29 does not generate a casting advance pulse. Further, the analog simulator 30 also generates 0 as simulation data of the casting speed. In such a state, the equipment simulator 28 first generates equipment data for starting casting at 13:00 based on the set key information (=13:00). At this time, the equipment simulator 28 also changes the basic information of the casting speed case in the analog table 26, and the analog simulator 30
Simulated data is generated in which the casting speed is gradually increased from the specified casting speed (-0.4 m/s).

The application program of the continuous casting system 21 that receives the input for starting casting performs casting start processing, and sets the plant status of the system mode table 32 to the pouring mode. Next, when the casting length simulator 29 enters the casting mode, the analog simulator 3
The advancement length of the slab is determined based on the casting speed at which zero is occurring, and a slab advancement pulse is generated.

After continuing this state for a while, when the casting length reaches 10 m, the equipment simulator 28 again changes the basic information of the casting speed case in the analog table 26, and sets it to a constant casting speed (= 1 m/ s) to be generated by the analog simulator 30.

On the other hand, regarding the equipment data for cutting the bottom crop, in order to generate a simulated cutting signal at a position of 5 m from the beginning of the slab, the cutting origin position (assuming = 50 m) + 5 m, so the casting length is 55 m. When the equipment simulator 2
8 may generate a simulating signal for cutting the bottom crop. Note that cutting signals other than bottom crop cutting and top crop cutting (such as the first slab cut) are determined by the casting length simulator 29 based on the planned cutting length (15 m in the case of Fig. 37) set in the casting length table 25. A simulated signal is generated so that the bottom of the slab is sequentially cut by the planned cutting length.

As described above, by sequentially generating equipment data, changing the casting speed, and generating a casting progress pulse, it is possible to generate data that simulates the continuous casting line 19 in a form close to the actual one. .

〔Effect of the invention〕

As described above, according to the present invention, when performing a simulation test on a computer control device for a continuous manufacturing process line, generation of a simulated process signal in accordance with a series of movements of the continuous manufacturing process line is performed together with a simulated interrupt signal. The signal is generated from a signal generator and is configured to create a process schedule based on key information such as the processing step length, current time, and elapsed processing time of the continuous manufacturing process line. It is possible to perform accurate simulation tests that are most suitable for the operating conditions of the process.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an overview of the continuous casting system, Figure 2 is a configuration diagram of the process signal generator for the continuous casting line control computer, Figure 3 is a detailed diagram of the master table, and Figure 4 is the casting length table. Detailed view: Figure 5 is a detailed view of the index table, Figure 6 is a detailed view of the schedule table, Figure 7 is a detailed view of the analog table, Figure 8 is a detailed view of the input/output data table, and Figure 9 is the system. A detailed diagram of the mode table, Figure 10 is a detailed diagram of the interrupt information of the input/output data table in Figure 8, Figure 11 is a flowchart showing the processing flow of the CRT man-machine, and Figure 12 is a diagram of the start processing of the casting length simulator. 13 is a flowchart showing the processing flow of the periodic process of the casting length simulator, FIG. 14 is a flowchart showing the detailed flow of the simulation necessity determination process in FIG. 13, and FIG. 15 is the flowchart shown in FIG. 13. 16 is an explanatory diagram showing the meaning of each piece of information collected in the process of Fig. 14, and Fig. 17 is a flowchart showing the detailed flow of the current casting length information grasping process, Fig. 17 is an explanation of the casting length simulation interruption shown in Fig. 13. , a flowchart showing the detailed flow of the suspension process among the stop processes;
Fig. 18 is a flowchart showing the detailed flow of the stopping process of the casting length simulation interruption and stopping process shown in Fig. 13, and Fig. 19 is a flowchart showing the detailed flow of the next slab advancement length determination process shown in Fig. 13. , Fig. 20 is an explanatory diagram showing the method for determining the advancing length of the blown slab, and Fig. 21 is
Figure 3 is a flowchart showing the detailed flow of the casting length pulse value setting process, Figure 22 is an explanatory diagram showing the method of calculating the pulse counter set value for each roll equipment, and Figure 23 is a flowchart showing the process flow of the equipment simulator's scheduling process. Flowchart, FIG. 24 is an explanatory diagram showing a detailed processing method of mode 1 (time) scheduling in FIG. 23,
FIG. 25 is a flowchart showing the processing flow of equipment data generation processing of the equipment simulator, and FIG. 26 is an explanatory diagram showing key point passage detection criteria. FIG. 27 is a flowchart showing the processing flow of the analog simulator, FIG. 28 is a flowchart showing the detailed flow of analog data generation in FIG.
Figure 7 is an explanatory diagram showing the data generation pattern for analog data generation (variable mode), Figure 30 is an explanatory diagram showing the data generation pattern for analog data generation (synchronous mode) in Figure 27, and Figure 31 is a continuous casting line. FIG. 32 is an explanatory diagram schematically showing what kind of simulation data is generated by the process signal generator for the control computer to simulate the continuous casting line. FIG. 32 is an explanatory diagram showing the format of the simulation screen of the CRT man-machine. 1... Tanditshu, 2... Mold, 3...
Cooling device, 4... pinch roll, 5... slab, 6...
... Cutting machine, 7... Conveyor, 8... CRT, 9...
・Typewriter 110...operator console,
DESCRIPTION OF SYMBOLS 11... Input/output device, 12... Input/output subsystem, 13... Process signal generator for continuous casting line control computer, 14... Casting control section, 15... Cutting control section, 16 ... Conveyance control section, 17... Casting pretreatment section,
18... Schedule processing section, 19... Continuous casting line, 20... Computer system, 21... Continuous casting system, -22... Schedule table, 23...
Index table, 24... Master table, 2
5... Casting length table, 26... Analog table, 27... CRT man-machine, 28... Equipment simulator, 29... Casting length simulator, 30... Analog simulator, 31... Input Output data table, 32... System mode table, 33... Steel billet detector, 34... Cutting origin, 35... Simulation table section, 36... Simulator section, 37... Simulation screen , 38...Function Na input field, 39
...Table Nα input field, 40...Case Ha input field, 41...Table data input field.・ Agent Patent Attorney Tatsuyuki Unuma Figure 2, Figure 3, Figure 4, Figure 5, L-1, Figure 6, Figure 7, Figure 12 Figure 13 Figure 14 (0L) Figure 16 (G) Nest 21 Figure I L scale 2 Figure 23 Figure 27

Claims (1)

[Scope of Claims] 1. Each process from each processing device of a manufacturing process line that continuously produces products from raw materials through a plurality of processing devices each arranged at a fixed position to form a series of manufacturing lines; A computer control device that controls each of the process processing devices based on a signal, comprising: a simulated process signal generating device that generates a simulated process signal and a simulated interrupt signal equivalent to each of the process signals; a schedule creation unit that creates a processing schedule that matches the progress state of the steps of the process using the processing step length, current time, and processing elapsed time of the process line as key information;
A computer control device for a manufacturing process line, characterized by comprising: