JP2938263B2 - Information processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus such as a controller for a plant control, and more particularly to a case where a multi-task system program is executed, or a target plant is added or modified, or a program processing is added. When the need arises to debug the control program, online debugging of only the task without stopping tasks unrelated to the debugging, or the access destination of the control program is programmable and each step of the control program The present invention relates to an information processing apparatus capable of switching online / offline every time.

[0002]

2. Description of the Related Art A single programmable controller can control a plurality of tasks. Therefore, when a new process is added to an existing process, the task of the added process is added to the programmable controller. Further, there is an increasing need to debug the added task while keeping the existing process running.

As means for achieving this, conventionally, as described in Japanese Patent Application Laid-Open No. 62-99807, for example, in addition to a sequence program memory, an input / output memory, and a process connection state memory having the same configuration as the input / output memory are simulated. By providing an input / output memory and performing a logical operation between the input / output memory, the process connection state memory, and the simulated input / output memory at the time of executing the input / output, it is possible to forcibly turn on / off each address of the input / output memory. .

According to this method, even if some input signals are not obtained in the sequence program, the input points are forcibly changed.
By performing N / OFF, the sequence program can be executed. Therefore, if a complete sequence program including input / output points which will be added in the future can be created first, it is possible to easily cope with a case where input / output points are added later.

On the other hand, the performance of process controllers has been steadily increasing, and systems for controlling a plurality of plants with one process controller are increasing. Therefore, in a plant where control cannot be stopped in the middle, such as a chemical plant, etc., if the control program needs to be debugged due to the expansion or repair of the target plant, addition of control program processing, etc. It is indispensable to be able to debug only the control program without stopping the control programs other than the control program to be debugged among the control programs.

Under such a background, Japanese Patent Application Laid-Open No. 60-935 has been disclosed.
As described in Japanese Patent Application Publication No. 19, a simulation decoding section is connected to a signal bus, and the simulation decoding section uses an address signal sent from the central processing unit as an address and accesses an actual process input / output device to the address. Or a flag indicating whether to access the image input / output memory, and by allowing access to the actual process input / output device or the image input / output memory, the process input / output device related to the debugging work is stored. There is a method that enables a debugging operation without taking only a process offline and stopping other process input / output devices online.

This method is intended for the sole debugging of the process input / output device, and switches between online and offline only for the process input / output device. Consideration is given to the debugging of the plant control program. Absent.

Further, in this system, a modification or the like occurs in one plant of a system in which information is transmitted using data of the same address on a shared memory between each plant controlled by one process controller, and the plant is modified. When a debug operation is performed on the control program, the simulation decoding unit switches on-line / off-line in units of addresses, so that even a plant that is desired to be continuously operated goes offline. In other words, no consideration was given to taking only the control program to be debugged off-line.

Further, each time the process input / output device is accessed, the address is decoded, and the online / offline determination and switching are performed. Therefore, there is a problem that the program execution time increases because the decoding time includes the program execution time. Was.

[0010] Further, as another technique, a process controller is duplicated to share a normal system for controlling the plant and a standby system for not controlling the plant, and a control program for the plant is debugged by adding a plant or the like. In the prior art, a method was adopted in which the standby side was taken offline and the normal system and the standby system were instantaneously switched at the end of debugging.

In this technique, the process controller 2
The problem that the cost is doubled by the duplication, and the problem that the control algorithm of the process controller becomes complicated and the debug work of the plant control program is larger than that of the single process controller by the duplication. was there.

[0012]

With the advancement of control in recent years, the use of the same input point for a plurality of tasks has been increasing. When the same input point is used in multiple tasks, when trying to debug a task, turning on and off the same input point in the task affects other tasks, and it works normally. Will be gone. Therefore, means for preventing the on / off of the same input point in the task from affecting other tasks is required.

In the above-mentioned prior art, since a forced ON / OFF is performed for each address of the input / output memory, when the same input point is used for a plurality of tasks, the input point is set to one address in the input / output memory. Therefore, the above-mentioned problem of the influence of ON / OFF of the same input point between tasks cannot be solved.

Further, since a logical operation is performed between memories, a circuit for the operation and a time for the operation are required.
Further, since the input / output memory, the process connection state memory, and the simulated input / output memory are provided, the memory capacity is very large.

[0015] This also becomes a serious problem in a recent programmable controller which is required to be reduced in size and speed.

An object of the present invention is to provide an information processing apparatus capable of debugging between tasks or processes without affecting each other.

[0017] To solve the above problems, the present invention includes a plurality
Information processing device that controls the control program of the plant
Then, for each plant,
Storage means for storing respective control programs
And a series of instructions contained in each control program
Each time the instruction is brought online or
Online / Offline indicating whether or not to fly
A second storage unit in which information is stored; and a first storage unit.
The stored control programs are sequenced for each plant.
Next read, included in the read control program
Execution of a series of instructions
Executing means for outputting a more resultant output data, the O
Offline / offline information is set
Test data is stored as input data for instructions
And the execution result of the instruction by inputting the test data
And offline memory that is storing, the online / O
The input for the instruction set online in the fly line information
Actual data from each plant is stored as force data
And execute the instruction by inputting the actual data.
Results are stored as control data given to each plant.
Online memory to be stored and each command by the execution means
Before executing an instruction, the online /
Refer to the online information and check the online / offline information.
If the information is set to online,
Switch the access destination of the row to the online memory, and
The online / offline information is set to offline
The access destination of the execution means is off.
It is characterized by comprising switching means for switching to line memory
An information processing apparatus is provided.

According to the information processing apparatus of the present invention, (a)
Executing means for controlling the control program stored in the first storage means;
Program for each plant, and
A series of instructions contained in the issued control program
The output data obtained by executing the series of instructions.
(B) In the second storage means, each of the control programs is output.
For each set of instructions contained in the gram,
Whether the instruction is online or offline
Online / offline information indicating whether or not
(C) the switching means executes each instruction by the execution means
Prior to the online / offline corresponding to the instruction
Refer to the information and enter the online / offline information.
If the online setting has been made,
Switch the access destination to the online memory,
Offline setting is set in line / offline information
In this case, the access destination of the execution means is set to the offline
Switch to memory. As a result, (d) offline memo
Offline to the online / offline information
Command execution result that has been set (the previously prepared
Instruction execution result by inputting the
(E) in the online memory,
Online / offline information is set online
Command execution result (for actual data input from the plant)
Command execution result), the control given to each plant
It is stored as control data. In addition, in online memory
The stored control data is transmitted via the plant input / output device.
Given to each plant and stored in offline memory
The verification data is sent to the user by the programming device.
Referred to.

[0019]

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

FIG. 1 is an overall configuration diagram of a programmable controller which is an information processing apparatus according to one embodiment of the present invention.

[0021] (1) corresponding to each instruction in the sequence program memory 4, the forced ON / OFF enable disable bit memory 6 having information on whether the force ON / OFF the instruction, (2) the bit Is valid, a forced ON / OFF bit memory 5 containing information (first data) for forcibly turning on or off the command; and (3) forced ON
/ OFF valid invalid bit when the memory 6 is enabled forced ON / OFF bit memory 5 data, to disable CPU data PIO (process input and output device) when the,
The above problem can be solved by combining with the switch 3 for switching data.

According to the present invention, a forced ON / OFF valid / invalid bit, a forced ON / OF
By adding the F bit, even if the same input / output point is included in a task other than the task being debugged, the influence of ON / OFF of the input / output point in the task is not given to other tasks. Online debugging of tasks can be easily realized.

FIG. 2 is an overall configuration diagram of a system having a programmable controller according to one embodiment of the present invention. This programmable controller (PC) 1 has P
An IO (process input / output device) 8 is connected to a switch 9 via a common I / F card, a sensor A10 and a motor A11 via a PIO card 1, a sensor B14 and a motor B15 via a PIO card 2, and the like. . Therefore, in this example, a new process can be added without stopping an existing process by adding a PIO card. Also, the programmable controller 1 and PI
Data transfer between O8 and O8 can be either serial transfer or parallel transfer.

The motor A11, the belt conveyor A1
2. The sensor A10 is an existing process that has existed before, and includes a motor B15, a belt conveyor B16, and a sensor B1.
4 is a process newly added this time. Each process aims at moving the BOXes 13 and B17 on the belt conveyors A12 and B16, respectively, below the respective sensors A10 and B14. Note that the programs listed here are examples.

FIG. 3 shows the task of each process in FIG. 2 in a sequence circuit. A contact X0 of task A
00 is turned on by the switch 9. B contact X001
Remains ON until the sensor A10 detects the BOX A13. When X000 and X001 are turned on, the output coil Y001 is turned on to drive the motor A11, and the belt conveyor A12 starts to move. When the sensor A10 detects the BOX A13, the contact B X001 is turned off and the output coil Y0
01 turns off. Therefore, the motor A11 stops, and the belt conveyor A12 also stops. Therefore, the BOX A 13 was able to move below the sensor A 10.

The operation of task B is similar.

FIG. 4 shows a display unit 7b of the programming device 7.
5 is an example of a display format displayed on the screen.

A detailed operation for debugging task B of a newly added process in this embodiment will be described with reference to FIG.

(1) First, in order to initialize the forced ON / OFF bit memory 5, the operation unit 7 of the programming device 7
By accessing the register 2a in the CPU from c and setting one bit in this register, all the data in the forced ON / OFF bit memory 5 is set to the forced off side (0 in this embodiment). You.

(2) Operation section 7c of programming device 7
And a command to be forcibly turned on / off in the sequence circuit diagram of the task B displayed as shown in FIG.
In this example, the A contact X000 is selected by an input method such as a key-in, a light pen, a touch panel, etc., and is forcibly turned on / off.
Since the valid / invalid bit memory 6 is set to the valid side (1 in this example) and the instruction is to be forcibly turned on in this embodiment, the compulsory ON / OFF bit memory 5 is set to the ON side (1 and 1 in this example). Yes).

Forced ON / OFF valid / invalid bit memory 6
And the input of the compulsory ON / OFF bit memory 5 is compulsory O
When an instruction to be N / OFF is selected, a space for inputting a value appears on the display unit 7b as shown in FIG. 4, where the input is performed in the same input method as when the instruction is selected. A plurality of instructions for forcibly turning on / off can be selected.

The set value is transmitted to the forced ON / OFF valid / invalid bit memory 6 of the address corresponding to the selected instruction via the main body of the programming device 7 and the CPU, and the forced ON / O
The data is written to the FF bit memory 5.

The setting of the forced ON / OFF valid / invalid bit memory 6 and the forced ON / OFF bit memory 5 is performed for each instruction.

(3) To confirm the set value, select the instruction to be confirmed from the sequence circuit diagram of task B displayed on the operation unit 7c and the display unit 7b as shown in FIG. 4, as in (2). As a result, the data of the forced ON / OFF valid / invalid bit memory 6 and the data of the forced ON / OFF bit memory 5 are transferred to the display unit 7 via the CPU and the main body of the programming device 7.
b and can also correct this value. The correction value is input in the same manner as in (2).

(4) When the data in the forced ON / OFF valid / invalid bit memory 6 is valid, the data set in the above is ANDed with the data in the forced ON / OFF bit memory 5 when the data in the valid / invalid bit memory 6 is valid. Is ANDed with the PIO data. Since the data obtained by ORing the results of the two ANDs is sent to the data bus, when the CPU sequentially executes each instruction of the sequence program, the CPU forcibly turns ON by the data of the forced ON / OFF valid / invalid bit memory 6. The data of the / OFF bit memory 5 or the PIO is received, and the processing is executed based on this data.

Therefore, in this example, when the CPU sequentially executes the instructions of the sequence program, the A contact X000 of the task B has the forced ON / OFF valid / invalid bit because the data in the memory 6 is ON. It is forcibly turned on by the data in the memory 5, and the task A
The task B can be online debugged irrespective of the operation of the contact X000.

Another embodiment is shown in FIG.

FIG. 5 is provided with a diagnosing unit for controlling a controlled object by inputting a set value and a feedback value from the controlled object to the control unit, and performing a fault diagnosis based on an output of the control unit and a feedback value of the controlled object. Control system.

FIG. 6 is an example of a sequence circuit diagram of the control section task and the diagnosis section task. The control unit task is A contact X00
When 0, X001 and X002 are turned on, the coil R001
Turns ON. Similarly, A contacts X000, X003, X00
When the switch 4 is turned on, the coil R002 turns on. Further, when the A contacts X000, X005, X006 are turned on, the coil R003 is turned on.

The diagnosis section task turns ON the contact B X000,
Further, if the A contact R001 turns on, the error coil Y001
Is ON, and if the A contact R002 is ON, the error coil Y0
When 02 is turned on and A contact R003 is turned on, error coil Y003 is turned on. Where Y001, Y002, Y
Reference numeral 003 turns on / off the error signal.

Normally, the B contact X000 of the diagnosis section task is O
No error signal is output because N is not performed. But,
If there is an abnormality, there may be a case where it is desired to check whether an error signal is output normally. For that purpose, the B contact X000 of the diagnosis unit task must be turned on, and in this case, the A contact X000 of the control unit task will be turned off,
The control unit task stops. If the present invention is used when it is desired to confirm the operation of the diagnosis unit task while the control unit task is operating normally, the B contact X000 of the diagnosis unit task is changed to the operation of the A contact X000 of the control unit task as in the above embodiment. Can be forcibly turned ON / OFF irrespective of the operation, and the operation of the diagnosis unit task can be confirmed.

According to this embodiment, online debugging of a multitask ladder program can be easily executed for each task regardless of the presence or absence of a common input / output point with other tasks.

According to this embodiment, it is possible to check the operation, debug, and the like of a program that is not normally used, such as a failure diagnosis program, without affecting the actual control system.

Another embodiment will be described with reference to FIG. FIG.
Is a process controller 51 according to an embodiment of the present invention.
And a programming device 52 for writing / reading a control program and offline memory data. Existing plants A 66 a and B 66 b and an extension plant C 6
6c. Process controller 5
1 is a central processing unit (CPU) 53 for sequentially reading and executing a plant control program, a plant control program storage memory 55 (hereinafter, program memory) connected to the CPU 53 via the CPU bus 54, and an online / offline switching flag storage. Memory 56 (flag memory)
An online / offline switching control unit 57 (hereinafter referred to as a switching control unit) for outputting an online / offline control signal 62 to the bus buffers 81 and 82 from the CPU bus 54 and the flag memory data 61; Online memory 59 connected to 54
And an offline memory 60. CPU53
Is connected to peripheral elements, devices, devices, and the like in addition to the actual storage unit and the process input / output device .
On- line memory 59 is shown on behalf of those connected devices.
I have.

Here, in the program memory 55, control programs for the plants A 66a and B 66b and the plant C 66c which requires debugging work by extension are mixed.
Step 2 of program steps 1-4 is plant C
Step 1 is a control program for the plant A 66a, steps 3 and 4 are control programs for the plant B 66b, and the flag memory 5
6 has an online / offline switching flag corresponding to each step of the program memory 55, and the address of the flag corresponds to the storage address of the program memory 55. Regarding the data in the flag memory 56, 0 is online and 1 is offline.

The central processing unit 53 reads program step 1 of the program memory 5 to sequentially read and execute the instructions. At this time, since the data in the flag memory 56 corresponding to the program step 1 is 0, that is, online, the switching control unit 57 enables the online bus buffer 81. At the next instruction execution stage, the online bus buffer 81 is enabled, so that the plant A 66a can be controlled via the data read / write to the online memory 59 or the process input / output device 65. Next, the central processing unit 53 reads the program step 2 of the program memory 55. At this time, the flag memory 56 corresponding to the program step 2
Is 1, that is, offline, the switching control unit 57 enables the offline bus buffer 82 and disables the online bus buffer 81. When execution is started according to the instruction read by the central processing unit 53, the setting of the bus buffer has been completed, so that reading and writing to the offline memory 60 via the offline bus buffer 82 becomes possible.

The programming device 52 includes a CPU
By setting the online / offline switching via the switch 53 to the switching control unit 57 so that both the online memory (process input / output device) 59 and the offline memory 60 can be accessed, the offline memory 60 is used. Manipulate data to the debuggee program,
Since the output of the program can be verified, the efficiency of the debugging operation can be improved, and the program that has been debugged can be brought online at any time, thereby greatly reducing the plant startup time.

FIG. 9 shows an embodiment in which the above invention is applied to an actual plant.

FIG. 9 shows an example in which a test plant is added to an assembly line which is an existing plant (line).

The existing assembly plant (line) is composed of a start switch 28, a motor A21, a belt conveyor A23, an assembly robot 67, an assembly positioning sensor 69, and an end lamp 20, and these components are processed through a process input / output 65a. It is taken into the controller 51.

FIG. 10 shows an example of these control programs.

The outline of the control is as follows. The motor A21 is turned on, the assembly object 68 is moved below the assembly positioning sensor 69, the parts are assembled into the assembly object by the robot 67, and the end lamp 20 is turned on when the assembly is completed.

The flow of the assembly control is described by a control program 1
Referring to FIG. 10, which is an example, the activation switch 28X
Turning on 000 turns on the a contact X000 in the program via the process input / output device 65a to excite the coil Y000 connected to it. Thereby, the motor A
When 21 starts and moves to below the assembly positioning sensor 69, the contact X001, which is a sensor signal, turns ON. As a result, the coil R000 is excited, and the Y-contact (motor ON) during self-holding is brought into contact with the b contact R000.
Is turned off, and Y000 (motor ON) is also turned off.

When X001 (sensor signal) is turned on, the assembling robot operation start signal coil Y100 is excited, and the assembling robot 67 starts operating. When the operation of the assembling robot 67 is completed, the signal X100 indicates R00.
1 is excited, the b-contact R001 is turned off, the assembly robot start signal Y000 is turned off, and the assembly robot 67 is turned off.
The operation of is ended. Further, the end lamp 20 is turned on by exciting Y001.

Until the test apparatus 25 is completed, the end lamp 20 is viewed by a person, subjected to a manual test, and packed and shipped.

The above-described process control (automatic assembly and manual inspection) is performed until the test apparatus 25 is added and the control program for the test apparatus described below is completed, and during the test apparatus 25 is added or the test apparatus program is debugged. Even if it is, it is assumed that it must not be stopped.

Next, the expansion plant will be described. The outline of the control is as follows. At the end of the assembly of the assembly plant (line), the assembling plant motor A21 and the test plant motor B22 are operated, and the test object sensor 26
After the test, the pass lamp 27 is turned on after the test is completed by the test apparatus 25.

The above-mentioned operation will be described with reference to a program example shown in FIG. 5. X100 which is an assembling end signal of the existing assembling process (line) is fetched by a contact a, the motor A21 in the assembling process (line) is turned into the coil Y000, the test process (line). By exciting the coil Y010 of the motor B22, both belt conveyors A23 and B24 are operated, and both motors A21 and B22 are operated until the test device sensor 26X002 is turned on. When the sensor 26 detects the object and moves the object under the test device 25, the coil R003 is excited, and the coils Y000 and Y010 are turned off by the b-contact R003, and the motors A21 and B2 are turned off.
2 stops. When the test device 25 completes the test, the a contact X100 is turned on, the coil Y011 is excited, and the pass lamp 27 is turned on.

The problem here is that the above-mentioned assembly plant (line) and test plant (line) programs are used. In FIGS. 10 and 11, X100 and Y000 are used for both programs. Since the output is set in address units, if X100 is taken off-line, the operation of the assembling plant is also taken off-line along with the debugging of the control program for the test plant to be added, and the off-line data is turned on and off without permission.
Then, the plant that is online (operating), in this case, the assembly plant, outputs an end signal that does not match the actual control.

In this embodiment, online and offline can be specified for each step of the program, so that online and offline can be individually specified even with the same input / output address. As shown in FIG. Y
000 instructions can be implemented by setting an off-line bit at the position of the flag memory corresponding to the program step storing the 000 instruction. However, the flag memory is "0", online "1", and offline.

One of the effects of the present embodiment is that if a process controller for controlling a plurality of plants by one unit requires debugging of the plant control program due to the addition or repair of the plant, the control of a plant other than the plant concerned is required. By taking only the control program of the plant offline without affecting the plant, storing the data in the offline memory, and verifying and operating with a debugging device such as a programming device, the efficiency of the debugging work is improved. By bringing the debugged control program online at any time, the start-up time of an extension or repair plant can be significantly reduced.

The second effect of this embodiment is that the program execution time can be reduced as compared with the conventional method as shown in FIG. This will be described in detail below.

In the conventional system, the on-line / off-line switching flag is extracted based on the address sent from the central processing unit, so that the following procedure is required for executing the instruction. First, the central processing unit reads an instruction from the program memory, decodes an address at the stage of executing the instruction, extracts an online / offline switching flag, performs online / offline switching, and then proceeds to actual instruction execution. Therefore, there is a problem that the program execution time increases. According to this embodiment, since the central processing unit reads the instruction from the program memory and simultaneously extracts and switches the online / offline switching flag, the execution time of the instruction is not affected. Program execution time can be minimized.

As a third effect of the present embodiment, in a system in which a single process controller controls a plurality of plants, when the control program needs to be debugged due to expansion or repair of a plant to be controlled. In the case where data is exchanged between an existing plant and a plant such as an extension or renovation plant using a shared memory as a medium, the online / offline is determined by an address in the conventional method.
Although it was necessary to stop the plant not involved in debugging because of the inability to switch off-line and debug the control program, the on-line / off-line switching can be performed for each step of the program according to the present embodiment. Another object of the present invention is to make it possible to switch between online and offline if the steps of the program are different, thereby enabling debugging work only on the relevant plant without affecting other plants.

In the present invention, a storage means for storing an instruction to be processed by a program and information on the validity / invalidity of the instruction, a processing device for executing the program, and information on the validity / invalidity of the instruction By
A switching unit that, when valid, sends the instruction to the processing device, and when invalid, skips the instruction;
The processing device may process the sent command. In this case, the number of data to be prepared can be reduced. Further, as described above, since the instructions are not executed one by one, the execution speed is increased.

[0066]

According to the present invention, it is possible to provide an information processing apparatus capable of performing debugging between tasks or processes without affecting each other.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a programmable controller according to the present invention.

FIG. 2 is an overall configuration diagram of a system including a programmable controller according to one embodiment of the present invention.

FIG. 3 is an explanatory diagram of a program according to FIG. 2;

FIG. 4 is an explanatory diagram of a display format of a display unit of the programming device according to FIG. 2;

FIG. 5 is an overall configuration diagram of a control system according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram of a program according to FIG. 5;

FIG. 7 is an explanatory diagram of a connection configuration between a process controller, a programming device, and a plant according to the present invention.

FIG. 8 is an explanatory diagram comparing a program execution time according to the conventional method and a program execution time according to the present invention method.

FIG. 9 is a system configuration diagram adopting the method of the present invention.

FIG. 10 is an explanatory diagram of a program example of an assembly line in FIG. 9;

FIG. 11 is an explanatory diagram of an example of a test line program in FIG. 9;

[Explanation of symbols]

 Reference Signs List 1 Programmable controller 2 CPU (central processing unit) 2a Register 3 Switcher 4 Sequence program memory unit 5 Forced ON / OFF bit memory unit 6 Forced ON / OFF valid / invalid bit memory unit 7 Programming device 7a Main unit 7b Display unit 7c Operation unit 8 PIO (Process Input / Output Control Device) 9 Switch 10 Sensor A 11 Motor A 12 Belt Conveyor A 13 BOXA 14 Sensor B 15 Motor B 16 Belt Conveyor B 17 BOXB 20 Assembly End Lamp 21 Motor A 22 Motor B 23 Belt Conveyor A 24 Belt Conveyor B 25 Test device 26 Test sensor 27 Pass lamp 28 Start switch 51 Process controller 52 Programming device 53 Central processing unit (CPU) 54 CPU bus 55 Plant Control program storage memory 56 Online / offline switching flag storage memory 57 Online / offline switching control unit 59 Online memory 60 Offline memory 61 Online / offline switching signal 62 Online / offline switching control signal 63 Online bus 64 Offline bus 65 Process input / output device 66 Controlled plants (A, B, C) 67 Assembly robot 68 Assembly target 69 Assembly positioning sensor 81 Online bus buffer 82 Offline bus buffer

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G06F 11/22 310 G05B 15/02 Z 11/28 19/05 Z (72) Inventor Mitsuaki Kobayashi 5-chome, Omika-cho, Hitachi City, Ibaraki Prefecture No. 1 Hitachi, Ltd. Omika Plant (72) Inventor Ryuichi Watanabe 5-2-1 Omika-cho, Hitachi City, Ibaraki Prefecture Hitachi Process Computer Engineering Co., Ltd. (72) Inventor Hisao Nagayama Omika, Hitachi City, Ibaraki Prefecture 5-2-1 Cho, Hitachi Process Computer Engineering Co., Ltd. (56) References JP-A-63-292301 (JP, A) JP-A-63-223903 (JP, A) JP-A-2-151902 (JP) JP-A-63-159905 (JP, A) JP-A-2-184902 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 9/46 G06F 1 1/22 G06F 11/28 G06F 9/32 G05B 23/02 G05B 15/02 G05B 19/02 G05B 19/05

Claims (1)

(57) [Claims] 1. A control program for controlling a plurality of plants.
An information processing apparatus for controlling each of the plants,
A first storage unit in which the programs are stored, and a series of instructions included in each of the control programs.
The instruction is online or offline, respectively.
Online / offline information indicating whether or not the user is
Are sequentially stored in the second storage unit in which is stored the control program stored in the first storage unit.
Next read, included in the read control program
Execution of a series of instructions
Executing means for outputting the obtained output data; and setting the offline information in the online / offline information.
Test data is stored as input data for the instruction
And execute the instruction by inputting the test data.
Offline memory for storing row results and online setting in the online / offline information
The input data for the command
These actual data are stored and input of the actual data
Is given to each of the plants.
An on-line memory stored as control data and, prior to execution of each instruction by the execution means,
Refer to the corresponding online / offline information and
Online / offline information is set to online
The access destination of the execution means is
Switch to online memory, and the relevant online / offline information
If the offline setting has been made to the
To switch the access destination of the device to the offline memory
The information processing apparatus comprising means.