JP2008027037A - Process simulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a process simulator for confirming a state of a process at a desired timing in a short time, when needed. <P>SOLUTION: Initial state of variable data which is calculated and changed by simulation is recorded in a first data recording file with time. When an appropriate specification condition is satisfied, the process simulator records the time and all variable data in a second data recording file. When the simulation state is confirmed at a desired timing, the process simulator reads the variable data satisfying the specification condition just before the desired timing, and performs simulation operation. After it exceeds the desired timing, simulation reverse operation is performed by sequentially reading the initial variable data recorded in the first data recording file by the simulation operation. Thus, the state at the desired timing can be repeatedly confirmed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a process simulator capable of simulating a process including a plurality of elements and confirming the state of the process at a desired timing.

  The following are known as conventional process simulators. In the method of Patent Document 1, a process is configured by a plurality of elements, and simulation is sequentially executed for each scan for this process. When you want to know the state of the process over a long period of time, we run the simulation for a long time, but after executing this simulation, if you want to know the state at a certain desired timing, run the simulation from the beginning to the desired timing again. There is a problem that it takes a long time to reach the desired timing. For this reason, when checking the state of the process at various timings, the simulation is repeated many times from the beginning, and it is necessary to wait for a very long time, which is very inconvenient. It is also conceivable to create the state data of each element at the previous timing close to the desired timing to be confirmed, write it as an initial value, execute a simulation from that timing to the timing to be confirmed, and confirm it. Since initial values are created and input for the elements of, input work is troublesome, which is also very time consuming and impractical.

JP 2006-24113 A

  The present invention provides a process simulator that can be confirmed in a short time when it is desired to confirm the state of a process at a desired timing.

  According to the present invention, the calculation execution means for sequentially executing the simulation operation for each scan for a plurality of elements constituting the process as the simulation target coincides with whether each element has a state change corresponding to each element. One of the variable data stored in the duplicated data storage means in order to check due to inconsistency is changed data due to a change in the element state by the operation for one scan, and the other pre-change data is inconsistent. The first data recording means for recording the other pre-change data in the first data recording file with time, and, when a predetermined condition is satisfied, a duplex timing of all the elements together with a predetermined timing that satisfies the condition. Second data recording means for recording one of the variable data stored in the digitized data storage means in the second data recording file, and second data recording Variable data and time read from the file are read as variable data and time at a predetermined timing close to the desired timing, and the read time is set as the elapsed time of the simulation and the variable data is duplicated for all elements Second data read setting means for setting in the data storage means, first data read setting means for reading the pre-change data and time from the first data recording file, and setting the pre-change data in the duplex data storage means, A reverse operation calculation executing means for sequentially rewinding each element to the time before one scan and the simulation state by the pre-change data read by the first data read setting means and the time; desired by the second data read setting means; Variables from the second data recording file at a predetermined timing before the timing When the data and time are read out, a simulation operation is performed by the calculation execution means using the variable data and the time, the pre-change data and time are recorded in the first data recording file, and the simulation is performed when the desired timing is exceeded. Using the pre-change data and time recorded in the first data recording file by the operation, reverse simulation operation is performed from the time when the desired timing is exceeded by the reverse operation calculation execution means, or desired timing is set by the second data read setting means. When the variable data and time are read from the second data recording file at a later predetermined timing, the first data recording file in which the pre-change data and time by the simulation operation are recorded is stored, and this first data recording file is stored. To the specified timing of the second data recording file It is characterized in that the data before the change and the time at the point in time are searched from the first data recording file and read out, and the simulation reverse operation is performed by the reverse operation calculation execution means from a predetermined timing.

  In addition, when sequentially rewinding from the time point exceeding the desired timing toward the desired timing, the first data read setting unit performs the simulation operation and before the change at the time when the simulation operation is stopped when the desired time is exceeded. Data and time are read from the first data recording file.

  Also, a recording start check instruction for executing a recording start check instruction for determining whether or not the simulation has reached the specified condition in order to execute the first data recording means and the second data recording means when the simulation reaches the specified condition. An execution means is provided.

  When the first data recording means records the other data before change of the other of the duplex data for the first time, the storage location of the duplex data of the element of the data before change and the identification data corresponding to the storage location A sequence table is created, and the identification data and the other data before change of the duplex data are matched with each other and recorded in the first data recording file with reference to the sequence table, and then the duplex data is matched. And

  The second data recording means refers to the element of the variable data when there is no identification data corresponding to the variable data when the variable data is recorded for the first time with reference to the sequence table. A duplicate data storage location and identification data corresponding to the storage location are created in an array table, and the second data record is created by referring to the sequence table and associating the identification data with one variable data of the duplicate data. It is recorded in a file.

  Further, the present invention is characterized by comprising variable data changing means capable of changing the variable data of the duplex data set by the second data read setting means to arbitrary variable data.

  According to the invention of claim 1 of the present application, when a pair of variable data in the duplicated data storage means does not match during the simulation operation, the other pre-change data is recorded with the first data over time. The variable read from the second data recording file is recorded in the file, the variable data of the duplex data storage means is recorded with time at a predetermined timing in the second data recording file, and the state of the process at the desired timing is confirmed. Since the simulation operation or the reverse simulation operation can be performed from the predetermined timing in the vicinity of the desired timing using the data and the time and the pre-change data and the time read from the first data recording file, when you want to see the desired timing, No need to perform simulation operation from the beginning, extremely low latency There, it is preferable to be able to see a short time repeatedly state at a desired timing. In addition, since the simulation operation can be repeatedly executed at a desired timing, the operation speed can be changed easily and quickly.

  According to the second aspect of the present invention, variable data and time at a predetermined timing before the desired timing close to the desired timing are read, and the simulation operation is performed from that state, and the simulation is performed at an arbitrary time beyond the desired timing. Since the operation is stopped and the pre-change data and the elapsed time for one scan at the time of the stop are read out so that the simulation reverse operation can be performed, the simulation operation reads out from the last variable data recorded in the first data recording file. As a result, the variable data of the first data recording file can be immediately identified, and the simulation operation can be performed by quickly and quickly returning from the arbitrary time to the desired timing using the variable data of the first data recording file. The state at the desired timing is repeated with a simple configuration. Returns can be confirmed.

  According to the invention of claim 3, since the recording start check instruction is executed when the simulation satisfies the specified condition, the recording areas of the first data recording file and the second data recording file are reduced, so that the cost is reduced. Is preferable, and the readout time can be shortened. In addition, by appropriately setting the designated conditions, it is possible to immediately reproduce the state at the desired timing.

  According to the fourth and fifth aspects of the present invention, an array table of the storage location of the duplex data and the identification data corresponding to the storage location is created, and the identification data and the duplex data are referenced with reference to the array table. Are recorded in the first data recording file and the second data recording file, so that the recording areas of the first data recording file and the second data recording file can be reduced, thereby reducing the cost and shortening the reading time. Is preferable.

  According to the invention of claim 6, since the variable data of the duplex data set by the second data read setting means can be arbitrarily changed by the data changing means, the simulation operation is stopped near the desired timing. After that, when executing the simulation operation or reverse simulation operation, you can easily change the simulation operation by changing the variable data arbitrarily, and you can quickly execute the simulation operation under different conditions with various changes to the variable data . Further, since the variable data can be changed at every predetermined timing from the middle of the simulation, the simulation operation can be changed from the predetermined timing, and the simulation operation under different conditions can be executed from the intermediate state and confirmed in a short time.

  Embodiments of the present invention will be described with reference to FIGS. FIG. 1 shows a personal computer PC1, a keyboard 2 as an input device, a display 3 as a display device for displaying simulation results, a memory 4 as a storage device for storing programs and calculation results, and a CPU 5 for executing simulations. And a clock means 6, and the program shown in the flowcharts of FIGS. 8, 9, 11, and 13 is stored in the memory 4 to constitute a process simulator. From the keyboard 2, input of a specified condition for executing a recording start check command in a first data recording program shown in FIG. 8 and a second data recording program shown in FIG. 9, and a second data recording file described later Input of comments C1 to Cn corresponding to 7a, 7b, 7c, etc. is performed, and variable data changing means capable of arbitrarily changing variable data in a duplex data storage means 8 described later.

  In addition, as shown in FIG. 1, the memory 4 has a double storage for storing variable data for checking whether there is a change in the state of each element corresponding to each element and checking whether there is a match or mismatch. Data storage means 8, a first data recording file 9 to be described later, a plurality of second data recording files 7a, 7b, 7c, a sequence table 10, and second data recording files 7a, 7b, 7c, respectively. The comment recording means 11 for recording the comments C1 to Cn input corresponding to the time and the time recording means 12 for recording the time corresponding to the actual time when the state change occurs when the simulation is performed are set. Yes. Here, duplication is to copy variable data a1 to n1 and prepare two identical variable data a1 to n1. For example, it corresponds to a plurality of elements constituting a process as a simulation target. As shown in FIG. 2, the duplex data storage means 8 stores a pair of variable data a1 to n1. In the duplex data storage means 8, as shown in FIG. 3A, one of the variable data changes from a1 to n1 to a2 to n2, for example, corresponding to the change of the element state by simulation. The changed variable data is stored as post-change data a2 to n2, and the other variable data is stored as pre-change data a1 to n1 that does not change due to changes in the state of the elements. When the pre-change data a1 to n1 are recorded in the first data recording file 9, as shown in FIG. 3B, one variable data a2 to n2 is copied to the other variable data a1 to n1. Then, one variable data is matched with the other variable data. The elements constituting the process are, for example, a workpiece cleaning device, a transport device, a processing device, and the like.

  As shown in FIG. 4, when the specified condition is satisfied in the first data recording program, which will be described later, the first data recording file 9 is sequentially timed from T1 to Tn + 1 every one scan until a recording stop command is issued thereafter. And variable data a1 to nn are recorded. In the first data recording file 9, the time SCAN = T1 when the specified condition is satisfied by the simulation is first recorded. Next, pre-change data a1 to n1 corresponding to the identification data x1 to xn are recorded together with the identification data x1 to xn of the elements whose state has changed in one scan of the simulation. Finally, the end time SCAN = T2 of one scan is recorded. These time and pre-change data are sequentially recorded at the recording position indicated by the recording pointer, and when the time and pre-change data are recorded, the recording pointer moves to the next recording position. The first data recording file 9 is set to an appropriate fixed recording range. When the time and the data before change are recorded to the end of the recording range, the recording pointer moves to the first recording position, Although the time and pre-change data are overwritten from the beginning recording position, since the simulation reverse operation is performed, the pre-change data and time from the predetermined timing to a certain timing exceeding the desired timing are not overwritten. It is a recording range.

  The identification data x1 to xn are recorded in the array table 10 corresponding to the elements A to N and the variable names (recording positions) ya to yn of the variable data of the elements A to N in the array table 10 shown in FIG. . When the first pre-change data of the duplex data is recorded for the first time together with the identification data x1 to xn in the first data recording file 9 by the first data recording means to be described later, the array table 10 After the duplication data recording positions ya to yn and identification data x1 to xn of elements A to N are recorded correspondingly or one variable data of the duplication data is matched with the other variable data When the variable data of one of the duplicated data is recorded for the first time together with the identification data x1 to xn in the second data recording files 7a, 7b and 7c to the second data recording means to be described later, it corresponds to the variable data. When there is no identification data x1 to xn to be recorded, the duplication data recording positions ya to yn of the variable data elements A to N and the identification data x1 to xn are recorded correspondingly and created.

  As shown in FIG. 6, the second data recording files 7a, 7b, and 7c are respectively named at predetermined timings T3, T6, and T9 when the specified condition is satisfied in the second data recording program as will be described later. F1, F2, F3 are attached and made independently. Each of the second data recording files 7a, 7b, 7c˜ has identification data x1˜1 corresponding to a predetermined timing at which the specified condition is satisfied and one variable data of the duplex data of all elements at the predetermined timing. Recorded with xn. The recording of one variable data of the duplicated data in the second data recording files 7a, 7b, 7c˜ is performed as shown in FIGS. 3A to 3B by the first data recording program described later. In addition, one variable data in the duplex data storage means 8 and the other variable data are matched. Each of these second data recording files 7a, 7b, and 7c is arbitrarily attached with comments C1 to Cn by the user, and the comments C1 to Cn correspond to the file names F1, F2, and F3. Then, it is recorded in the comment recording means 11 separately from the second data recording files 7a, 7b, 7c (FIG. 7). Note that variable data at a predetermined timing may be continuously recorded in one second data recording file, but each second data recording file is made independent at each predetermined timing, so that the second data recording file can be recorded separately. When reading the variable data, the variable data is read only from the necessary second data recording file. Compared to the case where the variable data is searched for and read from all the variable data as when the variable data is recorded together. Thus, the time for searching for variable data is short, and there is an effect that it can be read quickly.

  Next, the program shown in the flowcharts of FIGS. 8, 9, 11, and 13 will be described. First, the first data recording program shown in FIG. 8 will be described. Step S101 is an initialization unit, which initializes the variable data of each element of the duplex data storage unit 8, matches a pair of variable data for each element, clears the recording execution flag, and records the first data. The recording pointer of the file 9 is cleared, and the recording pointer is set as the first recording position of the first data recording file 9. Step S102 is a means for clearing the start of scanning and the time recording flag. The time starting flag is for recording the time SCAN in which the specified condition in step S103 is satisfied in the first data recording file 9 for the first time. is there.

  Step S103 is a recording start check instruction execution means, and a recording start check for judging whether a specified condition set appropriately by the user is satisfied in order to execute each of the recording means of steps S110, S111, and S115 described later. Execute the instruction. Here, the specified conditions are, for example, the start of simulation, the time when the simulation is reached, the case where a certain work (element) is carried into the specified device (element), or the case where the specified processing is performed by a certain device. This is the case when started. Step S106 is calculation execution means for calculating a command for each element, and a simulation operation is performed. At this time, for example, the state of the element is drawn on the display 3.

  Step S110 is a start time recording means for recording the time SCAN when the specified condition is satisfied in the first data recording file 9. Step S111 is the first data recording means, and the duplicate data of all the elements in which one of the variable data recorded in the duplicate data storage means 8 is changed to the post-change data by one scan calculation by simulation. The other change data before change is recorded in the first data recording file 9 in correspondence with the identification data x1 to xn. After recording, the other variable data in the duplex data storage means 8 is matched with one variable data. Further, when the first data recording means records the pre-change data of each element for the first time in the first data recording file 9 in correspondence with the identification data x1 to xn, the first data recording means stores the double data of the pre-change data of each element. The array table 10 of the recording positions ya to yn in the means 8 and the identification data x1 to xn corresponding to the recording positions ya to yn is created. In step S115, the end time SCAN of the current scan obtained by adding the elapsed time of one scan to the time SCAN when the designated condition recorded in step S110 is satisfied or the end time SCAN recorded in the previous scan is set as the first data recording file. 9 is an end time recording unit that records the pre-change data recorded in step S111. The data before the change for one scan is from one time to the next time of the first data recording file 9 recorded here.

  Next, the second data recording program shown in FIG. 9 will be described. Step S201 is initialization means, and a plurality of designated conditions 1 to n for recording one variable data of the duplex data to the second data recording files 7a, 7b, and 7c, and a designated condition. 1 to designation of file names F1, F2, and F3 of second data recording files 7a, 7b, and 7c when variable data is recorded for each designated condition n, and recording for each designated condition 1 to designated condition n The recording completion flag indicating that the recording is completed is set in the OFF state. The designated condition 1 to designated condition n in step S201 are a time condition of every set recording execution time, and an operating condition of every set operation such as when a certain workpiece reaches a predetermined position or when a predetermined machining is started. Yes, it can be created by the user as appropriate. As shown in the correspondence table 13 between the designated condition and the condition number shown in FIG. 10, each of the designated condition 1 to the designated condition n can be stored with the condition number 1 to the condition number n, respectively. By specifying the condition number 1 to the condition number n, the specified condition 1 to the specified condition n can be set, and the variables from the second data recording files 7a, 7b and 7c to the simulation reverse operation described later By specifying condition number 1 to condition number n at the time of data extraction, it is possible to immediately return to the state of specified condition 1 to specified condition n. At this time, comments C1 to Cn can be attached to the second data recording files 7a, 7b and 7c, respectively, and recorded in the comment recording means 11. Step S203 is a recording execution check instruction execution means, and executes a recording execution check instruction for determining whether or not the case designation condition in step S201 is satisfied in order to execute each of the recording means of steps S206 and S207 described later. .

  In step S206, when the specified conditions 1 to n are satisfied, the specified conditions 1 to n are satisfied in the second data recording files 7a, 7b and 7c corresponding to the satisfied specified conditions 1 to n. The second time recording means for recording the recorded time as a predetermined timing. Step S207 is the second data recording means, and the duplicated data storage means 8 of all the elements A to N is stored in the second data recording files 7a, 7b, and 7c that correspond to the specified conditions 1 to n that are satisfied. Is recorded in correspondence with the identification data x1 to xn of the array table 10 created in step S111. The array table 10 corresponds to the other variable data of the duplex data storage means 8 and the identification data x1 to xn, but the variable data is recorded in the second data recording files 7a, 7b and 7c. Since this is performed after the other variable data in the duplex data storage means 8 is matched with one variable data, one variable data of the duplex data and the identification data x1 to xn are in a correspondence relationship. When the variable data is recorded, if there is no identification data x1 to xn corresponding to the variable data of the elements A to N, the variable data duplex data storage means 8 stores the variable data in the array table 10 created in step S111. Recording positions ya to yn and corresponding identification data x1 to xn are added to the array table 10. Step S209 is similar to the calculation execution means of step S106, and a simulation calculation is performed.

  Next, the second data read setting program shown in FIG. 11 will be described. Step S301 is a second data recording file designating means. For example, when the desired timing for executing the simulation operation or the reverse simulation operation is T5, the second data recording file 7a at the predetermined timing T3 close to the desired timing T5 is selected. specify. At this time, the added comment C1 can be referred to by the dialog displayed on the display 3, or the condition number 1 can be input, so that a predetermined timing can be easily specified.

  Step S303 is second data read setting means, for example, as shown in FIGS. 12A and 12B, all the variable data (3 scans) from the second data recording file 7a specified in step S301. Data after eye change) a4 to n4 are taken out and stored in the respective storage locations ya to yn of the corresponding duplex data storage means 8 from the respective identification data x1 to xn. After the state shown in FIG. 12B is set, one variable data and the other variable data are set to coincide with each other to obtain the state shown in FIG. Further, the predetermined timing T3 is set as the elapsed time of the simulation operation. With the variable data a4 to n4 of the second data recording file 7a set in the duplex data storage means 8, the user converts the variable data as the duplex data into arbitrary variable data by the variable data change means 2. It is possible to change. By changing to arbitrary variable data here, simulation operations under different conditions can be performed using the intermediate state of the simulation, so there is no need to change to variable data with different conditions from the beginning and perform simulation. Can be executed in a pseudo manner. For example, after deciding the code number for each workpiece, performing simulation with a workpiece with a certain code number, and then entering the code number of another workpiece, variable data can be changed, and simulation can be continued by performing simulation from that state. You can check different conditions over time.

  Next, the simulation reverse operation program shown in FIG. 13 will be described. Step S402 is a first data read setting means. After the recording pointer of the first data recording file 9 is moved to the last written position in step S401, each scan for one scan is performed in the reverse direction from the position of the recording pointer. The pre-change data is taken out from the first data recording file 9 and stored in one of the variable data storage locations ya to yn of the duplex data storage means 8 corresponding to the identification data x1 to xn. For example, when the simulation is performed up to the seventh scan, the variable data a7 to n7 of the seventh scan are stored in the duplex data storage unit 8. Step S403 is reverse operation time setting means, which calculates the elapsed time between one scan from the end time of one scan read by the first data read setting means and the end time of one previous scan, The elapsed time between one scan is subtracted from the elapsed time of the simulation operation in a certain scan, and the time of the time recording means 12 is returned to the time before one scan from a certain scan.

  Step S404 is reverse operation calculation execution means, which performs a reverse simulation operation for returning to the state before one scan from a certain scan. At this time, the variable data recorded in the first data recording file 9 and the second data recording files 7a, 7b, 7c are not changed by the reverse operation flag or the like. The reverse operation calculation execution means includes drawing command means. For example, when the drawing command means is executed, the states of the elements A to N by the reverse simulation operation are drawn on the display 3 and can be confirmed by the user. The speed of the reverse simulation operation can be set as appropriate using the keyboard 2. When drawing the state of the previous element, return to the state of the previous element, change the state of the element by performing a simulation operation from the state of the previous element to the state of the previous element. However, drawing is performed, and by repeating this, the state of the element in the simulation reverse operation can be confirmed.

  Step S405 is a determination means for determining whether or not the variable data is read from the first data recording file 9 in step S404 and the recording pointer indicates the head area of the first data recording file 9, and step S406 is This means is means for moving the recording pointer to the last area of the first data recording file 9 when the recording pointer indicates the head in step S405. Step S407 is the limit at which the pre-change data recorded in the first data recording file 9 can be returned, that is, the recording range of the first data recording file 9 is set constant as described above. 9 is a limit judging means for judging whether the data before the change at the oldest time among the data before the change recorded continuously in 9.

  Next, simulation execution will be described. First, in the first data recording program, a specified condition is a case where a specified time T1 has been reached since the start of the simulation operation. In the first data recording program, when Steps S101 to S103 are executed and the specified time T1 has not been reached, it is determined as “No” in Step S104 and the process proceeds to Step S106, and a simulation operation for a certain element A is performed. Executed. Next, since the recording execution flag is “OFF”, the process proceeds to step S112. Since the pre-change data a1 is not recorded in the first data recording file 9, it is determined “No”, and the process proceeds to step S114. In step S114, when the calculation is not performed for each of the remaining elements B to N, the process returns to step S106 and the above steps are performed for each of the elements B to N. When the calculation for each of the elements B to N is completed and one scan is completed, the process proceeds from step S114 to step S115. Since recording has not yet started in the first data recording file 9, the process proceeds to step S116 without recording time. Similarly, the process in one scan is repeated.

  When the designated time T1 is reached, the start condition is determined to be “ON” in step S104, and the recording execution flag is set to “ON” in step S105. Since the recording execution flag is “ON”, “Yes” is determined in step S107 via step S106, and the process proceeds to step S108. In step S108, when the state of the element A has not changed by the simulation operation in step S106, the pair of variable data a1 and a1 in the duplex data storage means 8 are the same, and therefore “No”. As a result, nothing is recorded in the first data recording file 9, and the process proceeds to step S106 via steps S112 to S114. In step S108, if the state of element A has changed in step S106, one of the duplicated data storage means 8 becomes changed data a2 and does not match the other changed data a1. Is determined. Next, since the time recording flag is “OFF” in step S109, it is determined “Yes”. In step S110, the designated time T1 is recorded in the first data recording file 9, the recording pointer is moved, and the time recording flag is “ON”. It becomes.

  Next, when there is no correspondence between the identification data x1 and the recording position ya in the duplicated data storage unit 8 of the pre-change data a1 in the array table 10 in step S111, the identification data x1 and the pre-change data a1 are stored in the array table 10. The correspondence with the recording position ya is recorded, and the pre-change data a1 is recorded in the first data recording file 9 in correspondence with the identification data x1. When the pre-change data a1 is recorded, the recording pointer moves to match the other variable data a1 of the duplex data storage means 8 with one variable data a2. Next, in the same manner as described above, the process is repeated until one scan is completed. In step S115, the end time T2 is recorded in the first data recording file 9, and the calculation is repeated. When the recording pointer is at the end of the first data recording file 9 in step S112, the recording pointer is moved to the top of the first data recording file 9 in step S113. Furthermore, when data before change and time are recorded in steps S111 and S115, the data recorded previously is overwritten. Thereafter, the calculation is repeated until the calculation is completed.

  In the second data recording program, a plurality of recording execution times T3, T6, T9 are set as the designated conditions 1 to n for the second data recording files 7a, 7b, 7c as described above in step S201. Then, the respective second data recording file names are designated as F1, F2, and F3 corresponding to the respective recording execution times, and the recording completion flags are “OFF” corresponding to the respective designated conditions 1 to n. In step S202, scanning is started. Next, the process proceeds to step S204 via step S203. If the recording execution times T3, T6, and T9 are not set, the simulation calculation is performed on each element A to N in step S209, and when one scan is completed, the process proceeds to step S202. Return The next scan is started.

  If it is determined in steps S203 and S204 that the recording execution time T3 has been reached, the process proceeds to step S205. If the recording completion flag corresponding to the recording execution time T3 is “OFF”, the file corresponding to the designated condition 1 in step S206. The time T3 when the specified condition 1 is reached is recorded in the second data recording file 7a with the name F1, and the variable data a4 to n4 of all the elements A to N are recorded together with the identification data x1 to xn in step S207. In S208, the recording completion flag corresponding to the recording execution time T3 is set to “ON”. At this time, if the correspondence between the storage location of the variable data and the identification data is not recorded in the array table 10 in step S208, it is recorded. Next, when steps S209 and S210 are performed and one scan is completed, steps S202 to S211 are repeated until the next recording execution time T6 is reached. When the next recording execution time T6 is reached, the time T6 and the variable data a7 to n7 of all the elements A to N are identified in the second data recording file 7b of the file name F2 corresponding to the recording execution time T6 by steps S206 to S208. It is recorded corresponding to the data x1 to xn. The above is repeated until the computation is stopped. Note that the designated condition may be set by selecting a condition number in step S201.

  Next, a case where the states of the elements A to N at the desired timing T5 are confirmed again will be described. The second data recording file Fa at the predetermined timing T3 immediately before the desired timing T5 is designated by the operation confirmation request by the dialog displayed on the display 3 in step S301 of the second data read setting program shown in FIG. In step S302, a read setting instruction is issued. At this time, it can be selected with reference to the comment C1. Next, in step S303, variable data a4 to n4 are set in all the duplex data storage means 8, and a predetermined timing T3 is set in the time recording means 12.

  When the state at the predetermined timing T3 is set by the second data read setting program, the first data recording program is executed from the state and the simulation operation is executed toward the desired timing T5. At this time, the execution of the simulation operation is set as a specified condition, and the first data recording file 9 records the pre-change data and the elapsed time from the position indicated by the recording pointer. Thereby, simulation can be performed from the middle, and reconfirmation of the states of the elements A to N at the desired timing T5 can be quickly performed without waiting for a long time.

  Next, the reverse simulation operation will be described. When the simulation operation is performed until the seventh scan beyond the desired timing T5 in the simulation operation, and the confirmation is returned to the desired timing T5 again, first, the recording pointer is set by the simulation operation in step S401 of the simulation reverse operation program. The data is moved to the last written position in one data recording file 9, and before-change data a7 to n7 for the first scan of the seventh scan are extracted from the position indicated by the recording pointer in step S402, and the duplicated data is obtained from the identification data x1 to xn. Pre-change data a7 to n7 are set in the corresponding variable names in the storage means 8. Next, in step S403, the time between one scan is calculated from the times T7 and T8 of the first data recording file 9, subtracted from the elapsed time, and set in the time recording means 12 as the elapsed time before one scan. Returned. In step S404, a simulation reverse operation is performed to return to the previous scan by the pre-change data a7 to n7 set in step S402. Next, the process returns to step S402 via steps S405 to S408.

  In this case, if it is desired to display the state before one scan on the display 3 by a drawing command in step S404, after returning to one scan by executing the reverse simulation operation in the next step S404, that is, two scans from the beginning. After returning to the previous fifth scan, a simulation operation is performed and one scan is advanced, so that the sixth scan drawing one scan before the first seventh scan drawing state is displayed on the display 3. In the simulation operation for drawing the state before one scan on the display 3, for example, a reverse operation flag is set so that the pre-change data is not recorded in the first data recording file 9. Thereafter, steps S402 to S408 are similarly repeated, and the state at the desired timing T5 can be confirmed. If the recording pointer indicates the first area of the first data recording file 9 in step S405, the recording pointer is moved to the last area of the first data recording file 9 in step S406, and each step S402 to S408 is further performed. When it is repeated, the data before change of the first data recording file 9 which cannot be traced further is indicated, and the simulation reverse operation is terminated.

  In this simulation, for example, if an actual process that takes 7 days is performed in 5 days, if it is desired to confirm a change at a certain time on the 7th day as a desired timing again, the recording is performed every hour from an appropriate time as the recording execution time. When variable data is recorded in two data recording files, the variable data at the recording execution time immediately before the desired timing is taken out, and the simulation operation is performed toward a certain time on the seventh day, so that a maximum of one hour The change can be confirmed again by the simulation operation. Conventionally, since the simulation has been performed again from the beginning, another five-day simulation must be performed, and from the beginning, a 10-day simulation operation is performed. In this embodiment, the simulation is performed for five days and one hour. The operation is completed, and the time can be greatly shortened compared to the conventional method.

  In the above embodiment, the simulation operation is executed from the predetermined timing T3 immediately before the desired timing T5, and the simulation reverse operation is performed after the desired timing T5 is exceeded. The reverse simulation operation can also be performed using the variable data of the two data recording files 7b and the first data recording file 9. In this case, the first data recording file 9 in which the pre-change data and the time are recorded by the simulation operation is stored so that the data by the simulation operation when confirming the process state at the desired timing is not recorded. Each time of one data recording file 9 is associated with each predetermined timing (time) in each of the second data recording files 7a, 7b, 7c, so that the second data recording at a predetermined timing T6 immediately after the desired timing T5. After the variable data is read from the file 7b, the pre-change data for one scan at the time corresponding to the predetermined timing T6 is searched from the first data recording file 9 and read, and the process returns to the previous scan. Next, the pre-change data for one scan corresponding to the returned state is read from the first data recording file 9 and returned one scan before. By repeating this, it is possible to return to the desired timing T5. When the simulation reverse operation is performed using the second data recording file 7b at the predetermined timing T6 after the desired timing T5, since the recording area of the first data recording file 9 is constant as described above, old variable data or the like is used. Although the new variable data is overwritten, the recording area is a sufficient recording area in which the variable data necessary for returning to the desired timing T5 is not overwritten.

It is a block diagram which shows the structure of the process simulator of this invention. It is explanatory drawing of a duplication data recording means. It is explanatory drawing which shows the coincidence of variable data. It is explanatory drawing of a 1st data recording file. It is explanatory drawing of a sequence table. It is explanatory drawing of a 2nd data recording file. It is explanatory drawing of a comment recording means. It is a flowchart of a 1st data recording program. It is a flowchart of the 2nd data recording program. It is explanatory drawing of the corresponding | compatible table of designation | designated conditions and condition numbers. It is a flowchart of the 2nd data reading program. It is explanatory drawing which shows the transfer of the variable data from the 2nd data recording file to the duplex data storage means, and the agreement of the variable data of a duplex data storage means. It is a flowchart of a simulation reverse operation program. It is explanatory drawing which shows storage of the variable data from the 1st data storage means to the duplex data storage means.

Explanation of symbols

2 Variable data changing means (keyboard)
7a, 7b, 7c to second data recording file 8 duplicated data storage means 9 first data recording file 10 array table

Claims (6)

  Computation execution means that sequentially executes a simulation operation for each element constituting a process as a simulation target, and whether or not a state change has occurred in each element corresponding to each element is checked by matching or mismatching Therefore, when one of the variable data stored in the duplex data storage means is changed to the changed data due to the change of the element state by the calculation for one scan, and the other data before the change is inconsistent, First data recording means for recording the other pre-change data in the first data recording file with time, and duplex data storage means for all the elements together with a predetermined timing that satisfies the condition when the predetermined condition is satisfied A second data recording means for recording one of the variable data stored in the second data recording file, and a second data recording file The variable data and time to be read are read as variable data and time at a predetermined timing close to the desired timing, the read time is set as the elapsed time of the simulation, and the variable data is stored as duplicated data of all elements. Second data read setting means for setting means, first data read setting means for reading pre-change data and time from the first data recording file, and setting the pre-change data in a duplex data storage means, A reverse operation calculation executing means for sequentially rewinding each element to the time before one scan and the simulation state by the pre-change data and time read by the one data read setting means, and from the desired timing by the second data read setting means; Variable data and time from the second data recording file at the previous predetermined timing Is read out by using the variable data and the time, the simulation execution operation is performed by the calculation execution means, the pre-change data and the time are recorded in the first data recording file, and when the desired timing is exceeded, the first operation is performed by the simulation operation. Using the pre-change data and time recorded in the data recording file, the reverse operation calculation execution means performs a simulation reverse operation from the time when the desired timing is exceeded, or the second data read setting means performs a predetermined time after the desired timing. When the variable data and time are read from the second data recording file at the timing, the first data recording file in which the pre-change data and time by the simulation operation are recorded is stored, and the second data is stored from the first data recording file. At the time corresponding to the predetermined timing of the recording file. A process simulator characterized by searching for and reading pre-change data and time from a first data recording file, and performing a reverse simulation operation by reverse operation calculation execution means from a predetermined timing.   When sequentially rewinding from the time point exceeding the desired timing toward the desired timing, the first data read setting means performs the simulation operation and the pre-change data at the time point when the simulation operation is stopped when the desired time is exceeded. 2. The process simulator according to claim 1, wherein the time is read from the first data recording file.   Recording start check instruction execution means for executing a recording start check instruction for determining whether the simulation has reached the specified condition in order to execute the first data recording means and the second data recording means when the simulation reaches the specified condition. The process simulator according to claim 1 or 2, further comprising:   When the first data recording means first records each other data before change of the duplex data for the first time, the first data recording means assigns the storage location of the duplex data of the element of the data before change and the identification data corresponding to the storage location. A sequence table is created, the identification data and the other pre-change data of the duplex data are recorded in the first data recording file with reference to the sequence table, and then the duplex data is matched. The process simulator according to any one of claims 1 to 3.   The second data recording means refers to the array table, and when recording each variable data of one of the duplicated data for the first time, if there is no identification data corresponding to the variable data, the second data recording means The second data recording file is created by creating the storage location of the data and the identification data corresponding to the storage location in the sequence table, referring to the sequence table and associating the identification data with one of the variable data of the duplex data The process simulator according to claim 4, wherein the process simulator is recorded.   6. The process according to claim 1, further comprising variable data changing means capable of changing the variable data of the duplex data set by the second data read setting means to arbitrary variable data. Simulator.

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