JP3439945B2 - Programmable controller and sequence program execution method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable controller (programmable logic controller:
PLC) and sequence program execution method,
In particular, the present invention relates to a programmable controller and a sequence program execution method for executing a specific sequence program under a predetermined condition when a plurality of sequence programs are continuously and repeatedly executed.

[0002]

2. Description of the Related Art FIG. 13 shows a hardware configuration of a conventional programmable controller (programmable controller: PLC). The programmable controller 1 has a CPU 2, a program memory 3 storing a system program, a device memory 4 storing device information, a user data memory 5, and a communication buffer 6, and the external peripherals via the communication buffer 6. Data communication with the device 7 is possible.

A parameter storage unit 8 including a program information table 10 and a sequence program storage unit 9 are allocated to the user data memory 5, and the program information (program name) is stored in the program information table 10 of the parameter storage unit 8. And attribute) are written, and each sequence programming A, B, C is stored in the sequence program storage unit 9 (see FIG. 15).

Next, C of the programmable controller 1
The processing of the system program executed by PU2 will be described with reference to the flowchart shown in FIG. 14 and the operation diagram shown in FIG.

First, as program information acquisition processing, program information is acquired from the program information table 10 of the parameter storage unit 8 (step S100). Here, the program information acquired from the program information table 10 is the program name and attribute of each sequence program stored in the sequence program storage unit 9 of the user data memory 5 (see FIG. 15A).

Next, as the initial program execution processing, the program A stored in the sequence program storage section 9 (see FIG. 15B) is executed from the program name and attribute of the program information acquired in step S100 (see FIG. 15B). Step S101).

Next, as the scan program execution process, the program B in the sequence program storage unit 9 is executed from the program name and attribute of the program information (step S102).

Next, as another scan program presence / absence determining process, the presence / absence of another scan program is determined from the program name and attribute of the program information (step S103). If there is another scan program, it moves to the sequence program as a next scan program moving process (step S104), and then executes that program (program C) as a scan program executing process (step S102).

On the other hand, if there is no other scan program, the process directly returns to step S102 and the steps from the scan program execution process are repeated.

By the above processing, the sequence program is executed in the order as shown in FIG.

Therefore, for example, in the case of determining whether the program C is executed or not depending on the ON / OFF state of the bit device, the program B shown in FIG. 16A and the program B shown in FIG. 16C, a sequence jump processing step (step S200) based on reference bit information is added, and the program C shown in FIG. It is necessary to add a jump destination pointer Pn (for example, P0) and a sequence return processing step (step S300).

Further, in the case of determining whether the program C is to be executed or not depending on the ON / OFF state of the word device, the program B shown in FIG.
As shown in FIG. 7 (b), a sequence jump processing step (step S201) based on word information is added, and the program C shown in FIG.
As shown in FIG. 17D, it is necessary to add a jump destination pointer Pn (for example, P0) and a sequence return processing step (step S300).

When determining whether to execute the program C according to a request from an external peripheral device such as a programming / debug unit, the program B shown in FIG. 18A and the program B shown in FIG. As shown, a sequence jump processing step (step S202) by a peripheral request is added, and in the program C shown in FIG. 18C, as shown in FIG. Jump destination pointer Pn (for example, P0)
And a sequence return processing step (step S30
0) needs to be added.

Further, in the case of determining whether or not the program C is executed by the number of times the program is executed, FIG.
In the program B shown in FIG. 19B, as shown in FIG. 19B, the sequence jump processing step (steps S203 to S2) depending on the number of times the program is executed.
05) is added to the program C shown in FIG. 19C, as shown in FIG. 19D, the jump destination pointer Pn (for example, P0) and the sequence return processing step ( Step S300) needs to be added.

Further, in the case of determining whether or not the program C is executed by time, as shown in FIG. 20 (b), the program B shown in FIG. 20 (a) has a sequence jump depending on time. Processing step (step S
206 to step S207) is added, and the jump destination pointer Pn (for example, Pn) is added to the program C shown in FIG. 20C as shown in FIG.
0) and a sequence return processing step (step S
300) needs to be added.

[0016]

In the conventional programmable controller, as described above, a certain specific sequence program is executed according to the ON / OFF state of the bit device such as input / output bit information and internal bit information. Since it is necessary to describe a program code for determining whether the bit device is executed or not in the sequence program in the sequence program, it is not possible to easily change the bit device which determines whether the device is executed or not and the determination condition. There is a problem.

Further, in order to execute a certain specific sequence program according to the state of the value of the word device such as internal register information, it is necessary to write a program code in the sequence program for determining whether or not to execute in the state of the word device. Therefore, there is a problem in that it is not possible to easily change the word device and the determination value for determining whether or not to execute.

In order to execute a certain specific sequence program in response to an execution / non-execution request from an external peripheral device such as a programming / debug unit connected to the programmable controller, during execution of the sequence program, the external peripheral device does not receive a specific sequence program. Since it is necessary to write a program code for discriminating an execution / non-execution request, there is a problem that a bit device for discriminating an execution / non-execution request from an external peripheral device must be prepared.

Further, in order to intermittently execute a certain specific sequence program on the basis of the number of times of program execution, it is necessary to write a program code for intermittently executing the sequence program on the basis of the number of times of execution of the program. There is a problem that it cannot be changed.

In order to intermittently execute a specific sequence program on a time basis, it is necessary to write a program code for intermittently executing the sequence program on a time basis in the sequence program, so that the intermittent execution time can be easily changed. There is a problem that you cannot do it.

Further, in any case, since it is necessary to write a program code for determining the presence or absence of program execution in the sequence program, the sequence program becomes complicated, the readability of the sequence program deteriorates, and the relation of each program is related. To understand, you have to decipher the whole program.

The present invention has been made in order to solve the above-mentioned problems, and turns on / off the bit device.
Executes a specific sequence program in response to the off state, the state of the value of the word device, or the execution / non-execution request from the external peripheral device, or intermittently executes the specific sequence program on the basis of the number of program executions or the time. In this case, it is possible to easily change the determination condition of the bit device and the word device, the number of times the program is executed intermittently, and the time, and it is not necessary to prepare a special bit device and the sequence program is not complicated. An object of the present invention is to obtain a programmable controller and a sequence program execution method that do not deteriorate the readability of the sequence program.

[0023]

In order to achieve the above object, a programmable controller according to the present invention comprises:
A professional who repeatedly executes multiple sequence programs
In the programmable controller, the plurality of sequences
Sequence program case where the program is stored
Execution of the plurality of sequence programs with the storage unit
The system program that stores the system program
Mori and the first program as a scan program
Or the line between scans in the scan program
Shows the distinction that it is included in the second program
Program attribute information and execution of the second program
The program information including the execution condition information for
Settings for each of the sequence programs
And a stored program information table.
To cause a program to execute the second program
Execution condition determination program for determining the execution condition of
System and run this system program
The program information table
The second program exists in the program information
If the first program is scanned during the execution
The second program is executed by executing the case determination processing program.
It is determined whether or not the
By executing the second program, the sequence
The description corresponding to the above execution condition information is
Characterized by the point.

Programmable controller according to the next invention
In the above invention, the software is the program information
Bull is used for bit discrimination as the program attribute information.
Bit format included in the second program to be executed
The bit discrimination attribute indicating that it is another program is set.
At the same time, as the execution condition information, the bit discrimination
Device execution target information
The device setting value information indicating the execution condition is set,
The execution condition determination processing program has the program attribute
Based on the information, the
Device identification information
Bit device data from the device memory specified by
Bit device data acquisition process that acquires data
The bit device data value is the device setting value information
The execution condition is determined by determining whether the execution conditions shown in are satisfied.
If the condition is satisfied, the bit set as the bit discrimination attribute is set.
Bit discriminating program for executing the bit discriminating program
Execution processing and a series of processing routines including
It is characterized by

A programmable controller according to the next invention is the program information table in the above invention.
Bull is used for word identification as the program attribute information.
Word format included in the second program to be executed
The word discrimination attribute indicating that it is another program is set.
The execution condition information is used for word determination.
Device execution target information
The device setting value information indicating the execution condition is set,
The execution condition determination processing program has the program attribute
A program that determines the presence or absence of a word determination program based on the information.
Code determination program presence / absence determination processing and the device information
From the device memory specified by
Data acquisition process to acquire data
The value of the word device data is the device setting value information
The execution condition is determined by determining whether the execution conditions shown in are satisfied.
If the condition is satisfied, the word set as the word discrimination attribute is set.
Word discriminating program for executing the word discriminating program
Execution processing and a series of processing routines including
It is characterized by

Programmable controller according to the next invention
In the above invention, the software is the program information
Bull is an external peripheral device as the program attribute information.
To the second program executed by the peripheral request from
Peripheral request included Indicates that the program is a peripheral request
Attributes are set, and the execution condition determination processing program
Of the peripheral request program based on the program attribute information
Peripheral request program presence / absence determination process
Data from external peripherals via the communication buffer.
Peripheral request acquisition process and data from the external peripheral device
Determines whether the request is for the execution of the peripheral request program.
Different peripheral request discrimination processing and external based on the discrimination result
Data from peripheral device is a request to execute peripheral request program
If it is, the peripheral requirement set as the peripheral requirement attribute is
Peripheral request program execution processing to execute the request program
And a series of processing routines including
Characterize.

A programmable controller according to the next invention is the program information table in the above invention.
Bull is the first program as the program attribute information.
The second program is executed intermittently according to the number of times the RAM is executed.
Indicates that the program is an intermittent program included in the program
The intermittent attribute is set and the execution condition information is
As information, the execution count information indicating the execution count is set.
The execution condition determination processing program is
The presence or absence of the intermittent program is determined based on the program attribute information.
Number of times intermittent program presence / absence determination processing and the first program
The count value of the number of executions of the
Number of times determination process to determine whether the number of executions shown has been reached
And the execution count information indicates the count value based on the determination result.
When the number of executions is reached, it is set as the above-mentioned intermittent attribute.
Number of times intermittent program that executes the intermittent program
It executes a series of processing routines including
It is characterized by being.

Programmable controller according to the next invention
In the above invention, the software is the program information
Bull is the predetermined time as the program attribute information.
The second professional that executes intermittently according to the elapsed time
Indicates that the program is an intermittent program included in Gram
The intermittent attribute is set and the execution condition information
As, the elapsed time information indicating the elapsed time is set,
The execution condition determination processing program is
When determining whether there is an intermittent program based on sex information
Intermittent program presence / absence determination process
The count value of the overtime indicates the elapsed time indicated by the set elapsed time information.
A time determination process for determining whether or not an overtime has been reached,
The elapsed time count value is displayed as elapsed time information based on the determination result.
Set as the intermittent attribute when the elapsed time has been reached
Intermittent program that executes the specified intermittent program
Ram execution processing and a series of processing routines including
Is characterized in that.

A programmable controller according to the next invention continuously repeats a plurality of sequence programs.
Programmable controller that can be executed by returning
The program attributes as program information.
Must be a sequence program executed by an edge request
, And the program attribute is set as a parameter.
Has a program information table defined by
The program information table
Peripheral request program presence / absence determination processing by referring to gram information
Processing, peripheral request acquisition processing from communication buffer, peripheral request judgment
A series of processing called separate processing and peripheral request program execution processing
Perform routines and request execution / non-execution from external peripheral devices
The execution of a specific sequence program depending on
It is characterized by replacement.

Programmable controller according to the next invention
The controller continuously repeats multiple sequence programs.
Programmable controller that can be executed by returning
Program attributes in the program
Sequence program executed according to the number of times the program is executed
It has an attribute indicating that it is a ram, and its program attribute
Has a program information table that is parameterized
However, by executing the system program, the program information
Refers to the program information in the report table
Ram presence / absence determination process, number initialization process, number intermittent program
System presence / absence determination processing, number of times determination processing, number of intermittent programs
A series of processes called line processing, frequency initialization processing, frequency update processing
A specific sequence program
It is characterized in that the gram is intermittently executed on the basis of the number of times.

A programmable controller according to the next invention
Roller sequence program execution method
-To run the sequence program continuously and repeatedly
Programmable controller sequence pro
In the program execution method, the program information is
Sequence program executed by peripheral request for ram attribute
Attribute to indicate that the program is
Set parameters as program information, and
Peripheral request program presence / absence determination processing using communication
Peripheral request acquisition process, peripheral request determination process,
A series of processing routines called edge request program execution processing
Depending on the execution / non-execution request from the external peripheral device,
Whether to execute a specific sequence program
It is characterized by doing so.

A programmable controller according to the next invention
Roller sequence program execution method
-To run the sequence program continuously and repeatedly
Programmable controller sequence pro
In the program execution method, the program information is
The ram attribute is a sequence that is executed according to the number of times the program is executed.
An attribute indicating that it is a
Parameter setting of program attribute as program information
Whether there is an intermittent program by the system program
Judgment processing, frequency initialization processing, frequency intermittent program presence / absence judgment
Separate processing, number of times determination processing, number of times intermittent program execution processing,
A series of processing routines called number initialization processing and number update processing
Depending on the number of times, a specific sequence program can be
It is characterized by intermittent execution.

[0033]

[0034]

[0035]

[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

[0042]

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a programmable controller and a sequence program executing method according to the present invention will be described below in detail with reference to the accompanying drawings. In the embodiments of the present invention described below, the same or equivalent parts as those in the above-mentioned conventional example are designated by the same reference numerals as those in the above-mentioned conventional example, and the description thereof will be omitted.

The program information table 11 of the parameter storage unit 8 has, in addition to the program name and attribute data fields, a device for which program execution is to be determined, an execution condition and an intermittent condition data field,
These are parameterized.

As program attributes, "initial",
In addition to “scan”, “bit discrimination”, “word discrimination”, “peripheral request”, “intermittent number of times”, and “intermittent time” are added.

"Bit discrimination" is a program attribute indicating that it is a sequence program executed by bit discrimination, and "word discrimination" is a program attribute indicating that it is a sequence program executed by word discrimination. "Is an attribute indicating that the sequence program is executed according to a request from an external peripheral device, and" intermittent number of times "is a program attribute indicating that the sequence program is executed according to the number of times the program is executed. "Intermittent" is a program attribute indicating that the sequence program is executed according to time.

System program 12 of programmable controller stored in system program memory 3
As shown in FIG. 2, a specific program execution processing unit 13 by bit determination, a specific program execution processing unit 14 by word determination, a specific program execution processing unit 15 by a request from the external peripheral device 7, and programming It includes a program intermittent execution processing unit 16 based on the number of executions and a program intermittent execution processing unit 17 based on the time.

The specific program execution processing section 13 based on bit discrimination is constituted by a series of processing routines such as a bit discrimination program presence / absence discrimination processing, a bit device data acquisition processing from the device memory 4, and a bit discrimination program execution processing. The specific program execution processing unit 14 is composed of a series of processing routines such as word determination program presence / absence determination processing, word device data acquisition processing from the device memory 4, word device data determination processing, word determination program execution processing, and external peripheral devices. The specific program execution processing unit 15 according to the request from 7
It is composed of a series of processing routines including peripheral request program presence / absence determination processing, peripheral request acquisition processing from the communication buffer 6, peripheral request determination processing, and peripheral request program execution processing.

Further, the program intermittent execution processing section 16 based on the number of times of programming execution, the number intermittent program presence / absence determination processing, the number initialization processing, the number intermittent program presence / absence determination processing, the number determination processing, the number intermittent program execution processing,
It is composed of a series of processing routines such as a number initialization process and a number update process, and is a time-based program intermittent execution processing unit 1
Reference numeral 7 denotes a time intermittent program presence / absence determination process, a time initialization process, a time intermittent program presence / absence determination process, a time determination process,
It is composed of a series of processing routines called time intermittent program execution processing and time initialization processing.

(Specific Program Execution Processing by Bit Discrimination) Next, the processing of the system program executed by the CPU 2 of the programmable controller 1 (specific program execution processing by bit discrimination) is shown in the flow chart shown in FIG. 3 and FIG. The operation diagram shown in FIG.

First, as program information acquisition processing, program information is acquired from the program information table 11 of the parameter storage unit 8 (step S10). here,
The program information acquired from the program information table 11 is the program name, attribute, device for which program execution is to be determined, execution condition, and intermittent condition of each sequence program stored in the sequence program storage unit 9 of the user data memory 5. (See FIG. 4 (a)).

Next, as the initial program execution processing, the program A in the sequence program storage section 9 (see FIG. 4B) is executed from the program information (program name and attribute) acquired in step S10 (step S11).

Next, as the scan program execution processing, the program B in the sequence program storage unit 9 is executed from the program information (program name and attribute) (step S12).

Next, as another scan program presence / absence determining process, program information (program name and attribute)
Then, the presence / absence of another scan program is determined (step S13). If there is another scan program, it moves to the sequence program as the next scan program moving process (step S14), and then executes that program as the scan program executing process (step S12).

On the other hand, if there is no other scan program, the presence / absence of the bit determination program is determined from the program information (program name and attribute) as the bit determination program presence / absence determination processing (step S15). If there is no bit discriminating program, the process directly returns to step S12, and the steps from the scan program execution process are repeated.

On the other hand, if there is a bit discriminating program, the bit device data indicated by the device of the program information is obtained from the device memory 4 as the bit device data obtaining process (step S16).

Next, as the bit device data discrimination processing, it is discriminated whether or not the value of the bit device data acquired in step S16 is equal to the execution condition (set value) of the program information (step S17).

If the value of the bit device data is equal to the execution condition (set value) of the program information, that is, if the execution condition is satisfied, the program C of the sequence program storage unit 9 is executed as the bit discrimination program execution process (step S18).

On the other hand, if the execution condition is not satisfied, the process directly returns to step S12, and the process from the scan program execution process is repeatedly executed.

By the above processing, the sequence program is executed in the order and conditions as shown in FIG. That is, as shown in the flowchart of FIG.
The bit size set in the system program 12
Specific program execution processing unit 13 (bit discrimination
Bit discriminating program for discriminating the presence / absence of programs
Separate processing and bit device data from device memory
Bit device data acquisition process to acquire
The bit device data value is indicated by the device setting value information.
Whether the execution condition is satisfied or not is determined, and the execution condition is satisfied
If so, the bit discrimination program set as the bit discrimination attribute is set.
And the bit discrimination program execution process to execute the program
A series of processing routines including
This is done between scans, and the scan program
Executes specific program by bit discrimination between scans
Then, the bit discrimination program is executed. bit
When the determination program ends, the flow chart of FIG.
Rescan the scanning program as shown.

As a result, in order to execute a specific sequence program in the ON / OFF state of the bit device such as the input / output bit information and the internal bit information,
It is not necessary to write a program code for determining the presence / absence of execution of the bit device in the sequence program on / off state, and the bit device for determining the presence / absence of execution of the sequence program can be easily changed. In addition, the sequence program becomes simpler than before, the readability of the sequence program is not deteriorated, and the relationship between the sequence programs can be easily understood.

(Specific Program Execution Processing by Word Discrimination) Next, the processing of the system program executed by the CPU 2 of the programmable controller 1 (specific program execution processing by word discrimination) is shown in the flowchart of FIG. 5 and FIG. The operation diagram shown in FIG.

First, as program information acquisition processing, program information is acquired from the program information table 11 of the parameter storage unit 8 (step S10). here,
The program information acquired from the program information table 11 is the program name, attribute, device for which program execution is to be determined, execution condition, and intermittent condition of each sequence program stored in the sequence program storage unit 9 of the user data memory 5. (See FIG. 6A).

Next, as the initial program execution processing, the program A in the sequence program storage section 9 (see FIG. 6B) is executed from the program information (program name and attribute) acquired in step S10 (step S11).

Next, as the scan program execution processing, the program B in the sequence program storage section 9 is executed from the program information (program name and attribute) (step S12).

Next, as another scan program presence / absence determining processing, program information (program name and attribute)
Then, the presence / absence of another scan program is determined (step S13). If there is another scan program, it moves to the sequence program as the next scan program moving process (step S14), and then executes that program as the scan program executing process (step S12).

On the other hand, if there is no other scan program, the presence / absence of the word discrimination program is discriminated from the program information (program name and attribute) as the word discrimination program presence / absence discrimination processing (step S20). If there is no word discriminating program, the process directly returns to step S12, and the process from the scan program executing process is repeatedly executed.

On the other hand, if there is a word discrimination program, the word device data indicated by the device of the program information is obtained from the device memory 4 as the word device data obtaining process (step S21).

Next, as the word device data discrimination processing, it is discriminated whether or not the value of the word device data acquired in step S21 is equal to the execution condition (set value) of the program information (step S22).

If the value of the word device data is equal to the execution condition (set value) of the program information, that is, if the execution condition is satisfied, the program C of the sequence program storage unit 9 is executed as the word discrimination program execution processing (step S23).

On the other hand, if the execution condition is not satisfied, the process directly returns to step S12, and the process from the scan program execution process is repeatedly executed.

Through the above processing, the sequence program is executed in the order and conditions as shown in FIG. 6 (c). That is, as shown in the flowchart of FIG.
The word format set in the system program 12
Specific program execution processing unit 14 (word determination process)
Word judgment program for judging the existence of programs
Separate processing and word device data from device memory
Word device data acquisition process to acquire
The value of word device data is indicated by device setting value information.
Whether the execution condition is satisfied or not is determined, and the execution condition is satisfied
In that case, the word discrimination program set as the word discrimination attribute is set.
Program execution process to execute the word determination program
A series of processing routines including
This is done between scans, and the scan program
Execute a specific program by word discrimination between scans
Then, the word discrimination program is executed. word
When the determination program ends, the flow chart of FIG.
Rescan the scanning program as shown.

As a result, in order to execute a certain specific sequence program in the state of the value of the word device such as the internal register information, it is necessary to write a program code in the sequence program for determining whether the execution is performed in the state of the word device. Therefore, it becomes possible to easily change the word device that determines whether or not the sequence program is executed and the value that determines whether or not the sequence program is executed. In addition, the sequence program becomes simpler than before, the readability of the sequence program is not deteriorated, and the relationship between the sequence programs can be easily understood.

(Specific Program Execution Processing by Request from External Peripheral Equipment) Next, the programmable controller 1
The processing of the system program executed by the CPU 2 (specific program execution processing in response to a request from an external peripheral device) will be described with reference to the flowchart shown in FIG. 7 and the operation diagram shown in FIG.

First, as the program information acquisition processing, the program information is acquired from the program information table 11 of the parameter storage unit 8 (step S10). here,
The program information acquired from the program information table 11 is the program name, attribute, device for which program execution is to be determined, execution condition, and intermittent condition of each sequence program stored in the sequence program storage unit 9 of the user data memory 5. (See FIG. 8A).

Next, as the initial program execution processing, the program A in the sequence program storage section 9 (see FIG. 8B) is executed from the program information (program name and attribute) acquired in step S10 (step S11).

Next, as the scan program execution processing, the program B in the sequence program storage section 9 is executed from the program information (program name and attribute) (step S12).

Next, as other scan program presence / absence determining processing, program information (program name and attribute)
Then, the presence / absence of another scan program is determined (step S13). If there is another scan program, it moves to the sequence program as the next scan program moving process (step S14), and then executes that program as the scan program executing process (step S12).

On the other hand, if there is no other scan program, the presence / absence of a peripheral request program is determined from the program information (program name and attribute) as peripheral request program presence / absence determining processing (step S30). If there is no peripheral request program, the process directly returns to step S12,
The process from the scan program execution process is repeatedly executed.

On the other hand, if there is a peripheral request program, the peripheral request acquisition process acquires the transmission data from the external peripheral device 7 from the communication buffer 6 by the peripheral request acquisition process from the communication buffer (step S31).

Next, as a peripheral request determination process, step S
It is determined whether the transmission data acquired in step 31 is an execution request (specific program execution request) (step S3).
2).

If the transmission data is an execution request, the program C in the sequence program storage unit 9 is executed as peripheral request program execution processing (step S33).

On the other hand, if the transmission data is a non-execution request, the process directly returns to step S12 to repeatedly execute the scan program execution process and the subsequent steps.

By the above processing, the sequence program is executed in the order and conditions shown in FIG. 8 (c). That is, as shown in the flowchart of FIG.
The external peripherals set in the system program 12
Specific program execution processing unit 15 in response to a request from the device
(Peripheral request program that determines the presence / absence of a peripheral request program
Ram peripheral presence / absence determination process and external peripheral device via communication buffer
Peripheral request acquisition processing to acquire data from the
The data from the peripheral device is the execution request of the peripheral request program.
Peripheral request determination processing that determines whether or not there is this determination result
Based on the result, the data from the external peripheral device is processed by the peripheral request
Execute peripheral request program if it is a ram execution request
Peripheral request program execution processing to be performed, and a series of processing including
Processing routine) between scan programs
Between scan programs.
Execution of a specific program in response to a request from an external peripheral device
Then, the peripheral request program is executed. Peripheral request
When the program is finished, it will be shown in the flow chart of FIG.
Scan the scan program again.

As a result, in order to execute a specific sequence program in response to an execution / non-execution request from an external peripheral device such as a programming / debug unit connected to the programmable controller, an external peripheral device is included in the sequence program during the sequence program. It is no longer necessary to write a program code to determine the execution / non-execution request from the device, and it is not necessary to prepare a special bit device for determining the execution / non-execution request from the external peripheral device. In comparison, the sequence program is simplified, the readability of the sequence program is not deteriorated, and the relation between the sequence programs can be easily understood.

(Program Intermittent Execution Processing Based on Programming Execution Count) Next, the programmable controller 1
The processing of the system program executed by the CPU 2 (program intermittent execution processing based on the number of times of programming execution) will be described with reference to the flowchart shown in FIG. 9 and the operation diagram shown in FIG.

First, as program information acquisition processing, program information is acquired from the program information table 11 of the parameter storage unit 8 (step S10). here,
The program information acquired from the program information table 11 is the program name, attribute, device for which program execution is to be determined, execution condition, and intermittent condition of each sequence program stored in the sequence program storage unit 9 of the user data memory 5. (See FIG. 10 (a)).

Next, as the initial program execution processing, the program A in the sequence program storage section 9 (see FIG. 10B) is executed from the program information (program name and attribute) acquired in step S10 (step S11).

Next, as the number-of-times intermittent program presence / absence determination process, the presence / absence of the number of intermittent programs is determined from the program information (program name and attribute) (step S4).
0) If there is a number of times intermittent program, the number of times of program execution is initialized as number initialization processing (step S41).

Next, as the scan program execution processing, the program B in the sequence program storage section 9 is executed from the program information (program name and attribute) (step S12).

Next, as other scan program presence / absence determining processing, program information (program name and attribute)
Then, the presence / absence of another scan program is determined (step S13). If there is another scan program, it moves to the sequence program as the next scan program moving process (step S14), and then executes that program as the scan program executing process (step S12).

On the other hand, if there is no other scan program, the presence / absence of the intermittent program is determined from the program information (program name and attribute) as the intermittent program presence / absence determining process (step S42). If there is no intermittent program, return directly to step S12,
The process from the scan program execution process is repeatedly executed.

On the other hand, if there is a number of times intermittent program, it is judged whether or not the value of the number of times data has reached the intermittent condition (set value) of the program information as the number of times judgment processing (step S43). If the value of the number of times data reaches the intermittent condition (set value) of the program information, that is, if the intermittent condition is satisfied, the program C of the sequence program storage unit 9 is executed as the number of times intermittent program execution processing (step S44), and the number of times As the initialization process, the count data is initialized (step S45).

On the other hand, if the intermittent condition is not satisfied, the number of times data is incremented as the number of times updating process (step S46), and the process returns to step S12 to repeat the processes from the scan program execution process.

Through the above processing, the sequence program is executed in the order and conditions shown in FIG. That is, as shown in the flowchart of FIG.
The program set in the system program 12
Program intermittent execution processing unit 16 (
Number of intermittent programs to determine the presence or absence of intermittent programs
Presence / absence discrimination processing and counting of the number of scan program executions
Number of times to determine whether the value has reached the set number of executions
Judgment processing and the count value is set based on this judgment result.
Number of times the intermittent program is executed when the number is reached
A series of processing routines including intermittent program execution processing)
Is what happens between scans in a scan program
Yes, scan program scan
The number of times the program is executed intermittently based on the number of lines
Run an intermittent program. The intermittent program is over
Then, as shown in the flow chart of FIG.
Scan the program again.

As a result, in order to intermittently execute a specific sequence program on the basis of the number of times, it is not necessary to write a program code for intermittently executing the sequence program on the basis of the number of times, and the number of times of intermittent execution can be easily changed. You will be able to do it.
In addition, the sequence program becomes simpler than before, the readability of the sequence program is not deteriorated, and the relationship between the sequence programs can be easily understood.

(Time-Based Program Intermittent Execution Processing) Next, the processing of the system program executed by the CPU 2 of the programmable controller 1 (time-based program intermittent execution processing) is shown in the flowchart of FIG. 11 and FIG. The operation diagram shown in FIG.

First, as program information acquisition processing, program information is acquired from the program information table 11 of the parameter storage unit 8 (step S10). here,
The program information acquired from the program information table 11 is the program name, attribute, device for which program execution is to be determined, execution condition, and intermittent condition of each sequence program stored in the sequence program storage unit 9 of the user data memory 5. (See FIG. 12 (a)).

Next, as the initial program execution processing, the program A in the sequence program storage unit 9 (see FIG. 12B) is executed from the program information (program name and attribute) acquired in step S10 (step S11).

Next, as the time intermittent program presence / absence determining process, the presence / absence of the time intermittent program is determined from the program information (program name and attribute) (step S5).
0), if there is a time intermittent program, time data is initialized as time (time measurement value) initialization processing (step S51).

Next, as the scan program execution processing, the program B in the sequence program storage section 9 is executed from the program information (program name and attribute) (step S12).

Next, as another scan program presence / absence determining process, program information (program name and attribute)
Then, the presence / absence of another scan program is determined (step S13). If there is another scan program, it moves to the sequence program as the next scan program moving process (step S14), and then executes that program as the scan program executing process (step S12).

On the other hand, if there is no other scan program, the presence / absence of the time intermittent program is determined from the program information (program name and attribute) as the time intermittent program presence / absence determining process (step S52). If there is no intermittent program, return directly to step S12,
The process from the scan program execution process is repeatedly executed.

On the other hand, if there is a time intermittent program, it is judged whether or not the value of the time data has reached the intermittent condition (set value) of the program information as the time judgment processing (step S53). If the value of the time data reaches the intermittent condition (set value) of the program information, that is, if the intermittent condition is satisfied, the program C of the sequence program storage unit 9 is executed as the time intermittent program execution process (step S54), As initialization processing, time data is initialized (step S55).

On the other hand, if the intermittent condition is not satisfied, the process returns to step S12 and the steps from the scan program execution process are repeated.

Through the above processing, the sequence program is executed in the order and conditions shown in FIG. That is, in the flowchart of FIG.
As shown, the time set in the system program 12
Standard program intermittent execution processing unit 17 (time intermittent program
Time intermittent program presence / absence determination process for determining the presence / absence of ram
And the count value of the elapsed time from the specified point in time
This is a time determination process to determine whether the overtime has been reached, and
When the elapsed time count value is set based on the determination result
Time to run the intermittent program when the time is reached
A series of processing routines including intermittent program execution processing)
Is what happens between scans in a scan program
Yes, a time-based
Execute the program intermittent execution process, and execute the time intermittent program
To execute. Figure 1
As shown in the flowchart of No. 1, scan program
Scan again.

As a result, in order to intermittently execute a specific sequence program on a time basis, it is not necessary to write a program code for intermittently executing the sequence program on a time basis in the sequence program, and the intermittent execution time can be easily changed. You will be able to do it.
In addition, the sequence program becomes simpler than before, the readability of the sequence program is not deteriorated, and the relationship between the sequence programs can be easily understood. In addition, multiple sequence programs to be executed
In addition to the scanning program
Gram, word discrimination program, peripheral request program,
Two of intermittent program and intermittent program
If more than one of the programs are included, scan and
These programs (bit discriminator
Program, word discrimination program, peripheral requirement program
Program, frequency intermittent program, time intermittent program)
And then executed.

[0108]

As can be understood from the above description, according to the programmable controller of the present invention, the scan
Is it the first program as an online program?
Is the second process performed during the scan of the scan program.
Program genus indicating the inclusion in the program
Sex information and execution rules for executing the second program
Program information including the case information and multiple sequence
Program information table set for each program
Cable and prepare a second program for the system program.
Execution to determine the execution condition to execute the ram
This system program is equipped with a condition determination processing program.
By executing the program, the program information
The second program is added to the program information obtained from Bull
If it is present, it will be removed during the scan of the first program.
The second program is executed by executing the line condition determination processing program.
The presence or absence of the execution of the system is discriminated, and the second
By executing the program of
The description corresponding to the execution condition information is unnecessary in the gram
There is. Therefore, the sequence program is
Program becomes easier and the readability of the sequence program deteriorates.
Easy to relate to each sequence program
Can be understood by.

[0109]

According to the programmable controller of the next invention, by executing the system program, by referring to the program information in the program information table, peripheral request program presence / absence determination processing, peripheral request acquisition processing from the communication buffer, peripheral request determination processing, A series of processing routines called peripheral request program execution processing is performed, and the execution / non-execution of a specific sequence program is switched according to execution / non-execution requests from external peripheral devices, so programming / debugging connected to a programmable controller To execute a specific sequence program in response to an execution / non-execution request from an external peripheral device such as a unit, in the sequence program, write the program code to determine the execution / non-execution request from the external peripheral device in the sequence program. To eliminate the need, it is not necessary to prepare a special bit <br/> bets device for determining execution / non-execution request from the external peripheral device, also in comparison with the conventional sequence program easily Therefore, the readability of the sequence program is not deteriorated, and the relation between the sequence programs can be easily understood.

According to the programmable controller of the next invention, by executing the system program, the program information in the program information table is referred to and the number of intermittent programs presence / absence determination process, the number of times initialization process, the number of intermittent programs presence / absence determination process, and the number of times determination are performed. A series of processing routines such as processing, number of times intermittent program execution processing, number of times initialization processing, and number of times updating processing are performed, and a certain specific sequence program is intermittently executed based on the number of times. To execute the program, it is not necessary to write a program code for intermittently executing the sequence program on the basis of the number of times in the sequence program, and the number of times of intermittent execution can be easily changed. In addition, the sequence program becomes simpler than before, the readability of the sequence program is not deteriorated, and the relationship between the sequence programs can be easily understood.

[0112]

[0113]

[0114]

According to the sequence program execution method of the programmable controller of the following invention, the program attribute of the peripheral request is set as the program information, and the peripheral request program presence / absence determination processing by the system program, the peripheral request acquisition processing from the communication buffer,
A series of processing routines, such as peripheral request determination processing and peripheral request program execution processing, can switch execution / non-execution of a specific sequence program in response to execution / non-execution requests from peripheral devices. In order to execute a specific sequence program in response to an execution / non-execution request from an external peripheral device such as a debug unit, a program code is included in the sequence program to determine the execution / non-execution request from the external peripheral device in the sequence program. it is not necessary to describe, it is not necessary to prepare a special bit device for determining execution / non-execution request from the external peripheral device, also in comparison with the conventional sequence program is simplified, the sequence program Readability of , So also relates can be readily understood in the sequence programs.

According to the programmable controller sequence program execution method of the present invention, the number of intermittent program attributes is set as program information, and the system program determines whether or not the program is intermittent, the initialization of the program, and the presence or absence of an intermittent program. A certain sequence program is intermittently executed on the basis of the number of times by a series of processing routines such as a discrimination process, the number of times discrimination process, the number of times intermittent program execution process, the number of times initialization process, and the number of times update process, so that a certain sequence program is performed on the times basis. For intermittent execution, it is not necessary to write a program code for intermittently executing the sequence program on the basis of the number of times in the sequence program, and the number of intermittent executions can be easily changed. In addition, the sequence program becomes simpler than before, the readability of the sequence program is not deteriorated, and the relationship between the sequence programs can be easily understood.

[0117]

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing a part of a system program used in the programmable controller according to the present invention.

FIG. 3 is a flowchart of processing of a system program (specific program execution processing by bit discrimination).

4A to 4C are operation diagrams in a specific program execution process based on bit discrimination.

FIG. 5 is a flowchart of processing of a system program (specific program execution processing by word determination).

6A to 6C are operation diagrams in a specific program execution process by word determination.

FIG. 7 is a flowchart of processing of a system program (specific program execution processing by peripheral request).

8A to 8C are operation diagrams in a specific program execution process according to a peripheral request.

FIG. 9 is a flowchart of processing of a system program (program intermittent execution processing based on the number of times of programming execution).

10A to 10C are operation diagrams in a program intermittent execution process based on the number of times of programming execution.

FIG. 11 is a flowchart of a system program process (time-based program intermittent execution process).

12A to 12C are operation diagrams in a time-based program intermittent execution process.

FIG. 13 is a block diagram showing a hardware configuration of a conventional programmable controller.

FIG. 14 is a flowchart of system program processing in a conventional programmable controller.

15A to 15C are operation diagrams of program execution processing in a conventional programmable controller.

16A to 16D are ladder diagrams showing an example of a sequence program for a specific program execution process based on bit determination in a conventional programmable controller.

17 (a) to 17 (d) are ladder diagrams showing an example of a sequence program for a specific program execution process by word determination in a conventional programmable controller.

18A to 18D are ladder diagrams showing an example of a sequence program for a specific program execution process in response to a peripheral request in a conventional programmable controller.

19A to 19D are ladder diagrams showing an example of a sequence program for the number-based program intermittent execution processing in the conventional programmable controller.

20A to 20D are ladder diagrams showing a sequence program example for a time-based program intermittent execution process in a conventional programmable controller.

[Explanation of symbols]

1 programmable controller, 2 CPU, 3 system program memory, 4 device memory, 5 user data memory, 6 communication buffer, 7 external peripheral device, 8 parameter storage unit, 9 sequence program storage unit, 11 program information table, 12 system program, Specific program execution processing unit based on 13-bit discrimination, 14 program execution processing unit based on word determination, 15 Specific program execution processing unit based on request from external peripheral equipment, 16 Program intermittent execution processing unit based on programming execution count, 17-hour based Program intermittent execution processing unit.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G05B 19/05 G06F 9/32

Claims (10)

(57) [Claims] 1. Repeating a plurality of sequence programs
In the programmable controller to be executed, the sequence program that stores the sequence programs
A can program storage unit and a system for executing the plurality of sequence programs
Is it the first program as a scan program and the system program memory that stores the program?
Or the number of scan programs
A program showing the distinction between two programs
The RAM attribute information and the second program are executed.
Program information including execution condition information for
Of each sequence program
Comprising a program information table, and the system program, the real and the second program
Execution condition determination to determine the execution condition to execute
This processing system program is equipped with a processing program.
Is executed, the program information obtained from the program information table is
If the second program exists in the report,
During the scan of the first program, the execution condition determination process
Program to execute the second program.
Nothing is discriminated, and based on the discrimination result, the second program
The sequence program is executed by executing the RAM.
The description corresponding to the execution condition information is unnecessary in the system
Programmable controller. 2. The program information table is the program information table.
As program attribute information, before execution by bit discrimination
In the bit determination program included in the second program
While the bit discrimination attribute indicating that there is is set,
A program based on bit discrimination as the execution condition information
The device information and the execution conditions
The device setting value information shown is set, and the execution condition determination processing program is a bit determination program based on the program attribute information.
It bit determining program presence or absence determining process for determining the presence or absence of
And from the device memory specified in the device information
Get the bit device data of
Data acquisition process and the acquired bit device data value
Does the execution condition indicated by the device setting value information be satisfied?
If it is determined whether or not the execution condition is satisfied, the bit determination attribute
To execute the bit discrimination program set as
Bit discrimination program execution processing, including a series of processing
The method according to claim 1, characterized in that
On-board programmable controller. 3. The program information table includes the program information table.
Before executing by word discrimination as program attribute information
In the word discrimination program included in the second program
With the word discrimination attribute indicating that there is,
A program based on word determination as the execution condition information
The device information and the execution conditions
The device setting value information shown is set, and the execution condition determination processing program is a word determination program based on the program attribute information.
Word discriminating program for discriminating the presence / absence of presence / absence
And from the device memory specified in the device information
Get the word device data of
Data acquisition process and the acquired word device data value
Does the execution condition indicated by the device setting value information be satisfied?
If the execution condition is satisfied, the word determination attribute is determined.
To execute the word discrimination program set as a sex
Word discrimination program execution processing, including a series of processing
The method according to claim 1, characterized in that
On-board programmable controller. 4. The program information table is the program information table.
Peripheral request from external peripheral device as program attribute information
The peripheral elements included in the second program executed by
The peripheral request attribute indicating that the program is a request program is set.
Is the execution condition determination processing program, the peripheral request program based on the program attribute information
Peripheral request program presence / absence determination process
Data from external peripherals via the communication buffer.
Peripheral request acquisition process and data from the external peripheral device
Determines whether the request is for the execution of the peripheral request program.
A peripheral request determination process different to the external on the basis of the determination results
Data from peripheral device is a request to execute peripheral request program
If it is, the peripheral requirement set as the peripheral requirement attribute is
Peripheral request program execution processing to execute the request program
When, it performs a series of processing routines including
The programmable controller according to claim 1, characterized in that
La. 5. The program information table includes the program information table.
Number of executions of the first program as program attribute information
Included in the second program to be executed intermittently according to
Number of times intermittent attribute that indicates that the program is an intermittent program
Is set, and as the execution condition information, the
Execution count information indicating the number of executions is set, the execution condition determination processing program, the number intermittent program based on the program attribute information
Number of times the presence / absence of an intermittent program is determined
The count value of the number of executions of program 1 is
Number of times to determine whether the number of executions indicated by the row count information has been reached
Number judgment processing and the count value is the number of executions based on the judgment result
If the number of executions indicated by the information is reached,
For the number of times that the intermittent program is set
A series of processing routines including missing program execution processing
The professional according to claim 1, characterized in that it is performed.
Programmable controller. 6. The program information table includes the program information table.
As the program attribute information, the elapsed time from a predetermined point in time
Included in the second program to be executed accordingly
The time-intermittent attribute that indicates that the program is a time-intermittent program
The execution condition information is set as
Elapsed time information indicating an overtime is set, and the execution condition determination processing program determines whether the time intermittent program is based on the program attribute information.
Time intermittent program to determine presence / absence
Elapsed time from a fixed time is the set value
Time to determine whether the elapsed time indicated by the time information has been reached
Based on the discrimination process and the discrimination result, the count value of the elapsed time is
If the elapsed time indicated by the elapsed time information is reached, the time
Run the intermittent program set as the missing attribute
A series of processing routines including
The method according to claim 1, characterized in that
On-board programmable controller. 7. A programmable controller capable of continuously and repeatedly executing a plurality of sequence programs, wherein the program information has a program attribute having an attribute indicating that the program is a sequence program to be executed in response to a peripheral request. Having a program information table in which attributes are parameterized, by referring to the program information in the program information table by executing a system program, peripheral request program presence / absence determination processing, peripheral request acquisition processing from a communication buffer, peripheral request determination processing, A programmable controller characterized by executing a series of processing routines called peripheral request program execution processing, and switching execution / non-execution of a certain specific sequence program in response to execution / non-execution requests from external peripheral devices. 8. In a programmable controller capable of continuously executing a plurality of sequence programs repeatedly, the program attribute has an attribute indicating that the program is a sequence program to be executed according to the number of times of execution of the program. Then, it has a program information table in which the program attributes are set as parameters, and refers to the program information in the program information table by executing the system program, and determines the number of times intermittent program presence / absence determination processing, the number of times initialization processing, and the number of times intermittent program presence / absence determination. A programmable co-processor characterized in that a certain sequence program is intermittently executed on the basis of the number of times by performing a series of processing routines such as processing, number of times discrimination processing, number of times intermittent program execution processing, number of times initialization processing, and number of times updating processing. Controller. 9. A sequence program execution method of a programmable controller capable of continuously and repeatedly executing a plurality of sequence programs, wherein an attribute indicating that the program program is a sequence program to be executed by a peripheral request is provided as program information. By setting a parameter of the program attribute as program information provided by the system program, peripheral processing request presence / absence determination processing by the system program, peripheral request acquisition processing from the communication buffer, peripheral request determination processing, peripheral request program execution processing A sequence program execution method for a programmable controller, wherein execution / non-execution of a specific sequence program can be switched according to execution / non-execution request from an external peripheral device. 10. A sequence program execution method of a programmable controller capable of continuously and repeatedly executing a plurality of sequence programs, which is a sequence program executed according to the number of times the program is executed in a program attribute as program information. Is provided, and the program attribute is set as a parameter as program information, and the system program determines the number of times an intermittent program is present, the number of times initialization process,
A certain sequence program is intermittently executed based on the number of times by a series of processing routines such as a number of times intermittent program presence / absence determination process, a number of times determination process, a number of times intermittent program execution process, a number of times initialization process, and a number of times updating process. A programmable controller sequence program execution method.