JPH07219807A - Programmable controller system - Google Patents

Abstract

PURPOSE:To regenerate and display the program executing state of a programmable controller after tracing it in a designated optional range. CONSTITUTION:A programmable controller controls a controlled system in a prescribed control cycle by a control program and also can trace the executing state of the program under the execution in an optional range and for each instructions. The controller is provided with a tracing result memory 15 which stores plural tracing results, a tracing start/stop means 12 which starts and stops the tracing operation in response to the tracing start/stop instructions 17, and a tracing result storing means 14 which stores in time series the tracing results obtained in each control cycle in the memory 15 in a trace executing period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable controller device for controlling the process states of various equipments constituting a plant, and a programming device for tracing and reproducing the execution state of a control program in the programmable controller device. And a programmable controller system including.

[0002]

2. Description of the Related Art A program for controlling the operation of the various equipments is stored in a programmable controller device which is composed of a kind of computer for controlling the process states of various equipments which compose a plant.

The programmable controller device includes a PID operation or the like for the process data every time process data is input from a control target at a constant control cycle (scan cycle) in accordance with a stored control program. A predetermined control calculation is executed, the calculation result is sent to the control target device as an operation amount, and the operating state of the control target device is controlled to the target state.

[0004] As the plant becomes larger, the operation of each device to be controlled tends to be complicated. In addition, high control accuracy is required. Therefore, in order to control such a complicated operation with high accuracy, the control program also becomes complicated.

When a new program is created, the created program is incorporated into a programmable controller device to actually execute the program, and it is confirmed whether or not the program operates normally. Therefore, it is necessary for the operator to grasp the execution status of the program by some method. In order to meet such a demand, a programmable controller device having a function of displaying a program execution state in pseudo real time has been proposed.

[0006]

However, even in the programmable controller device for displaying the execution state of the program in pseudo real time, there are still the following problems to be solved.

That is, as described above, it is possible to display the execution state of the program in pseudo real time. However, the execution state of the program executed in each control cycle is not displayed by tracing it at any time, but the execution state of the program is traced (tracked) at a cycle visible to the operator separately from the control cycle of the program, Displaying the trace result, generally, it is enough to verify the behavior of the program. However, suspicious behavior occurs in each equipment of the plant, and in order to break it down at the program operation level, the operator has to monitor the execution state of the program for a long time, and the trace itself is also real. It is extremely difficult to grasp the actual operation because it is not executed in time.

The present invention has been made in view of such circumstances, and by providing a trace result memory for storing trace results in time series, the operator does not have to constantly monitor the execution state of the program. , Programmable controller device that can trace and display trace results by specifying an arbitrary period later if necessary, and can easily and quickly perform abnormality diagnosis and abnormality analysis work for control programs in the field in plant control An object is to provide a device and a programmable controller system.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention uses a control program to execute control processing on a control target at a predetermined control cycle, and It is applied to a programmable controller device capable of tracing an execution state in an arbitrary range for each instruction.

Then, as shown in FIG. 1, in the programmable controller device 11 of the invention of claim 1,
A trace result storage memory 15 for storing a plurality of trace results, a trace start / stop means 12 for starting / stopping a trace in response to a trace start / stop command, and each trace obtained in each control cycle during a trace execution period. A trace result storage means 14 for storing the result in a trace result storage memory 15 in time series is provided.

According to a second aspect of the programmable controller device of the present invention, the trace result storage memory 15 of the first aspect has a ring buffer structure in which a plurality of slots 16 are annularly connected, and the trace result storage means 11 is , The trace result is sequentially stored in each slot 16 connected in a ring.

According to a third aspect of the programmable controller device, in addition to the means of the programmable controller device of the first aspect, a trace start condition 180, a trace stop condition 181, and a delay from the establishment of the trace stop condition to the trace stop. A data storage memory 17 for storing the time 182 is provided. Further, the trace start / stop means 12 starts / stops the trace based on each condition and the delay time 182 stored in the data storage memory 17.

The programming device 19 according to the invention of claim 4
Is a trace result storage memory 112 for storing a plurality of trace results, and a trace result for each control cycle of a control program in the connected programmable controller device 11 is read out from the programmable controller device 11 to obtain a trace result. Storage memory 112
Trace result transfer means 110 for writing in time series, trace result extraction means 117 for extracting each trace result stored in the trace result storage memory 112 by designating an arbitrary time zone, and programmable controller device 11
Program source storage memory 114 for storing the same program as the above program, the program information read from the program source storage memory 114 and the trace results fetched by the trace result fetching means 117 are compared and collated, and the programmable controller device The program execution reproduction display means 118 for reproducing and displaying the execution state of the program in 11, and the program execution reproduction management means 116 for executing the trace result extraction means 117 and the program execution reproduction display means 118 at a designated cycle. .

In the programming device of claim 5, the program execution reproduction management means 116 in the programming device 19 of claim 4 specifies the extraction start position 113 in the trace result storage memory 112 to the trace result extraction means 117, Moreover, the trace result obtained by the trace result extracting means 117 and the designation information of the corresponding program 115 in the program source storage memory 114 are given to the program execution reproduction displaying means 118.

In addition to the means of the programming device 19 of claim 4, the programming device of claim 6 sends a trace start / end command to the programmable controller device 11 and transfers to the trace result transfer means 110 a transfer start / end command. Reproduction stop request generating means 123 for transmitting
Is provided.

A programmable controller system according to claim 7 is the programmable controller device 1 according to claim 1.
1 and the programming device 19 of claim 4 are connected.

That is, a control program is used to execute control processing on a controlled object at a predetermined control cycle, and the execution state of an arbitrary range in the program being executed can be traced in instruction units. It comprises a controller device and a programming device which is connected to the programmable controller device and reproduces and displays the execution state of the program in the programmable controller device.

Specifically, for the programmable controller device 11, a first trace result storage memory 15 for storing a plurality of trace results, and a trace start / stop for starting / stopping a trace in response to a trace start / stop command. Means 12 and a trace result storage means 1 for storing each trace result obtained for each control cycle in the first trace result storage memory in time series during the trace execution period.
4 and are added.

Also, for the programming device 19,
A second trace result storage memory 112 for storing a plurality of trace results and each trace result stored in the first trace result storage memory 15 of the programmable controller device 11 are read out to the second trace result storage memory. Trace result transfer means 110 for writing in time series
And a trace result extraction means 117 for extracting each trace result stored in the second trace result storage memory 12 by designating an arbitrary time period, and a program source for storing the same program as the program of the programmable controller device 11. A program for displaying the execution state of the program in the programmable controller device 11 by comparing and collating the storage memory 114, each program information read from the program source storage memory 114, and each trace result extracted by the trace result extraction means 117. Program execution reproduction management means 11 for executing the execution reproduction display means 110, the trace result extraction means 117, and the program execution reproduction display means 118 in a designated cycle.
6 and 6 are added.

[0020]

In the programmable controller device 11 according to the first aspect of the present invention configured as described above, for example, control processing is executed at a predetermined control cycle using a control program for a control target including each device constituting a plant. is doing. Then, for example, when a trace start command is input from the outside, the execution state of the program being executed is traced (traced) in units of instructions, and the trace result is written in the trace result memory 15 in time series. Then, when a trace stop command is input, the trace is stopped.

Therefore, the program controller device 11
Since it is possible to trace by specifying an arbitrary range for the operating state of the program being executed in, and to store and hold the trace result in the trace result storage memory, by reading the stored contents of this trace result storage memory, the You can grasp the operating status of the position.

According to another aspect of the programmable controller device 11 of the present invention, the trace result storage memory 15 has a ring buffer structure in which a plurality of slots 16 are annularly connected. Then, the trace result is sequentially stored in each slot 16 connected in a ring.

When the storage of the trace result in the final slot 16 is completed, the trace result storage slot moves to the leading slot. That is, when the trace period becomes long, a predetermined amount of the latest trace result is always stored and held in the trace result storage memory 15.

Therefore, by always executing the trace, it is possible to confirm the operating state of the program in the event of an abnormality without overlooking it. In the programmable controller device 11 according to claim 3, the operator presets a trace start condition 180 and a trace stop condition 181 in the data storage memory 17 in a range to be particularly verified for the program operation. The operator can surely obtain the trace result of the necessary portion.

Furthermore, by setting the delay time 182 in the data storage memory 17, the trace is not stopped immediately under the trace stop condition but for a predetermined period after the trace stop condition is satisfied. It is possible to get the trace result. That is, even if a predetermined event occurs and the stop condition is satisfied, by observing the Torres results for a predetermined period before and after that, it is possible to confirm the cause of the event and various events that occur due to this event.

The programming device 19 of claim 4 has a function of reproducing and displaying the execution state of the program by using each trace result stored in its own trace result storage memory 15 in the programmable controller device 11 of claim 1.

That is, the trace result for each control cycle stored in the programmable controller device 11 is read and written in the trace result storage memory 112 of its own in time series. On the other hand, the program source storage memory 11
4 stores a program used in the programmable controller device 11. Then, at the same time that each program information is read from the trace result storage memory 112, the corresponding position of the program is read from the program source storage memory 114, and the program and the trace result are compared with each other, for example, on a CRT display device. It is reproduced and displayed as the execution status of the program.

By connecting the programming device 19 having the above functions to the programmable controller device 11 in this manner, the operator can confirm the execution state of the program in the programmable controller device 11 at an arbitrary position on the display screen.

In the programming device 19 according to the fifth aspect, by designating the extraction start position of the trace result in the trace result storage memory 112 and the storage position of the program in the program source storage memory 114, the program and the trace result can be more reliably generated. You can grasp the operating status of the program by comparing and contrasting.

The programming device 19 of claim 6
In, the programming device 19 side can instruct the programmable controller device 11 to start and stop the trace. Therefore, remote control of the programmable controller device 11 is possible.

In the programmable controller system according to claim 7, the programmable controller device 11 according to claim 1 and the programming device 1 according to claim 4 are provided.
9 is connected. Therefore, the execution state of the program in the programmable controller device can be easily reproduced and displayed by the programming device.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic configuration diagram of a programmable controller system incorporating a blockable controller device and a programming device according to an embodiment of the present invention.

The programmable controller device 23 is connected to the programming device 21 via a transmission line 22. In the programmable controller device 23, I
An I / O card 25 for inputting / outputting process data from a control target, which is composed of various types of equipment constituting the plant, is connected via the / O bus 24. In addition, a CRT display 2 used for inputting or displaying data and programs to the programming device 21.
6 and the keyboard 27 are connected.

The programmable controller device 23 is constructed, for example, as shown in FIG. For the internal bus 38, the CPU unit 32, the OS memory 33, the program storage memory 34, the data storage memory 35, and the trace result storage memory 31 as the first trace result storage memory.
1, a transmission interface 36, an I / O input / output interface 37, etc. are connected.

The transmission interface 36 is the transmission line 2
Information is exchanged with the programming device 21 via the connection 2. The I / O input / output interface 37 is I / O
Data is input and output to and from the controlled object via the O bus 24 and the respective I / O input / output cards 25.

FIG. 5 shows the programmable controller device 2
It is a block diagram of various processing operations performed by the CPU unit 32 of FIG.
Processing programs for each of these processing tasks are written in the OS memory 33 in advance and are executed by the CPU unit 32. When the power of the system is turned on, the overall execution management unit 51 is activated, and the corresponding processing units 52 to 57 are activated in a predetermined procedure according to the occurrence of each event.

First, the program execution management unit 54 is shown in FIG.
3, the program 612 is extracted from the program storage memory 34 and executed, and the trace start / stop determination processing 63 is executed.

More specifically, as shown in the flow chart of FIG. 6, the program execution management unit 5 as described above.
1 is activated by the interrupt of the control cycle and initializes the program number i to 0. Next, trace start / stop determination processing 6
Execute 3. The i-th program 612 is extracted from the programs 611 to 613 written in the program storage memory 35. Then, in step 65, the extracted program i (612) is executed.

When the execution of the program i is completed, the program number i is updated to the next number. If the number i does not exceed the number N of the final program 613, the next program is executed. When the execution of the final program N ends, the processing of the program execution management 54 ends.

FIG. 7 is a subroutine showing the operation of the trace start / stop judgment processing 63 in the flowchart executed by the program execution management 54 shown in FIG. When the flow chart of FIG. 7 is started, it is first checked whether or not the corresponding program number 715 of the trace start request information 721 written in the data storage memory 35 and the program number i to be executed are the same. If they are not the same, the trace start / stop determination processing is immediately terminated. If they are the same, a tracing flag 720 written in the data storage memory 714.
Check. If the trace is not being traced in step 73, the trace start condition 716 of the trace start request information 721 written in the data storage memory 714 is taken out to check whether the trace start condition 716 is satisfied.

If not satisfied at step 74, the trace start / stop determination processing is immediately ended. If it is established, the trace interrupt is enabled and the tracing flag 720 is set.
Is set, and the trace start / stop determination processing ends.

If the trace is being traced in step 73, the trace stop condition 717 of the trace start request information 721 written in the data storage memory 714 is taken out, and the trace stop condition 717 is satisfied in step 78. Check if there is. If not satisfied, the trace start / stop determination processing is immediately ended.

In step 78, the delay counter 719 of the data storage memory 35 is updated if it is established. In step 710, the data storage memory 35
Compared with the delay time 718 of the trace start / stop request information written in, the trace start / stop determination processing is immediately ended if the time is not reached. If it has reached, the delay counter 719 is cleared, the tracing flag 720 is cleared, the trace interrupt is prohibited, and the trace start / stop determination processing is ended.

The program writing / reading processing unit 55 of the programmable controller device 23 in FIG. 5 writes the program 611 sent from the programming device 21 via the transmission processing unit 57 into the program storage memory 34. The program writing / reading processing unit 55 has a function of reading the program 611 from the program storage memory 34 in response to a program reading request from the programming device 21 and transmitting the program 611 to the programming device 21 via the transmission processing unit 57.

When activated by a trace interrupt, the trace result storage processor 53 in FIG. 5 stores the trace result in each slot 912 of the ring buffer 99 of the trace result storage memory 311 shown in FIG.

Specifically, as shown in FIG. 8, when the trace interrupt is permitted by the trace start / stop determination processing 53 and the program i is executed, one instruction 82,
A trace interrupt occurs each time 83, 84, ..., 85 is executed, and the trace result storage processing 53 is activated and executed. Trace interrupt is END indicating the end of program i
It continuously occurs until the execution of the instruction 86 is completed.

FIG. 9 is a flow chart showing the processing operation of the trace result storage processing 53. When the flow chart starts, first, the current slot number j (910) of the ring buffer 919 in the trace result storage memory 311 is detected and the slot j (912) to be taken out is determined. Next, the execution result of the instruction is stored in the current slot j (912). Next, at step 94, the currently executed instruction is EN
Check if it is a D instruction.

If it is not the END instruction, the trace result storing process is terminated. If it is an END instruction, the slot number j
Update (910). In step 95, if the updated slot number j (910) does not exceed the final slot n (913), the trace result storing process is terminated, and if it exceeds, the slot number j (910) is assigned to slot 0 (91).
The trace result storing process of this time is ended by rewriting to 1).

Trace result read processing unit 52 shown in FIG.
Reads the trace result from the trace result storage memory 311 according to the trace result read request from the programming device 21, and transmits it to the programming device 21 via the transmission processing unit 57.

The system data writing / reading processing unit 56 shown in FIG.
The system data and the like sent from 1 are written in the data storage memory 35. Further, the system data writing / reading processing unit 56 reads the system data or the like from the data storage memory 35 in response to a request for reading the system data or the like from the programming device 21 and intervenes the transmission processing unit 57 to transmit to the programming device 21. .

Further, the transmission processing unit 57 transmits data or the like to the programming device 21 in response to a request from each processing unit, receives data or the like sent from the programming device 21 and follows each predetermined procedure. Notify the processing unit.

Next, the programming device 21 connected to the programmable controller device 23 having the above configuration will be described. FIG. 4 is a block diagram showing a schematic configuration of the programming device 21. With respect to the internal bus 410, the CPU unit 42, the OS RAM memory 43, the data storage memory 44, the program source storage memory 413, the trace result storage memory 412 as the second trace result storage memory, the transmission interface 46, and the CRT interface. 45 and a keyboard interface 47 are connected.

The transmission interface 46 is the transmission line 2
Information is exchanged with the programmable controller device 23 via the control unit 2. The CRT interface 45 displays predetermined data and programs on the CRT display 26. The keyboard interface 47 inputs predetermined data, programs and the like from the keyboard 27.

FIG. 10 shows the C of the programming device 21.
5 is a schematic diagram showing each process executed by the PU unit 42. FIG. These processing programs are written in the OS memory 43 in advance. When the system is powered on and the system reset is released, the overall execution management unit 101 activates and executes each process according to a predetermined procedure every time a new event occurs.

The key input processing unit 102 inputs data or the like from the keyboard 27, notifies each processing unit according to a predetermined procedure, and starts up. The CRT display processing unit 103 displays data and the like on the CRT display 26 from another processing unit according to a predetermined procedure.

The program writing / reading processing unit 104 writes the program input from the keyboard 27 into the program source storage memory 413 according to a predetermined procedure. Also,
Program write / read processing unit 104 reads a program from program source storage memory 413 according to a read request input from keyboard 27 according to a predetermined procedure, and displays it on CRT display 26 according to a predetermined procedure. Further, the program writing / reading processing unit 104 reads the program from the program source storage memory 413 in response to the programmable controller writing request input from the keyboard 27 according to a predetermined procedure, and through the transmission processing unit 1010 according to a predetermined procedure. It is transmitted to the program storage memory 34 of the programmable controller device 23.

The system data write / read processing unit 105 in FIG. 10 writes the data and the like input from the keyboard 27 into the data storage memory 44 according to a predetermined procedure.
The system data write / read processing unit 105 also reads data or the like from the data storage memory 44 in response to a read request for data or the like input from the keyboard 27 according to a predetermined procedure, and displays it on the CRT display 26 according to a predetermined procedure.

Further, the system data writing / reading processing unit 105 reads data and the like from the data storage memory 44 in response to a writing request to the programmable controller device 23 input from the keyboard 27 according to a predetermined procedure, and performs transmission processing according to a predetermined procedure. It is transmitted to the data storage memory 35 of the programmable controller device 23 via the unit 1010.

The trace start request processing unit 106 of the programming device 21 of FIG. 10 notifies the programmable controller device 23 of the trace start request input from the keyboard 27 according to a predetermined procedure.

FIG. 11 shows the trace start request processing unit 10
6 is a flowchart showing the operation of No. 6. When the flow chart starts,
In step 112, first, the trace start request information 118 input from the keyboard 27 is temporarily written in the data storage memory 44 according to a predetermined procedure. Then step 113
Then, the trace start request information 118 is fetched from the data storage memory 44, transmitted to the programmable controller device 23 in accordance with a predetermined procedure, and then the present process is terminated.

Trace result read processing unit 1 in FIG.
Reference numeral 07 reads a trace result from the programmable controller device 23 in accordance with a trace result read request input from the keyboard 27 according to a predetermined procedure.

FIG. 12 shows the trace result read processing unit 12
6 is a flowchart showing the operation of No. 1; First, in step 122, a trace result read request is transmitted to the programmable controller device 23 in accordance with a predetermined procedure, and in step 123, the trace result sent from the programmable controller device 23 together with the ring buffer 99 is received as a response. In step 124, the received ring buffer 99 is written in its own trace result storage memory 412 as its own ring buffer 127, and this processing is ended.

Program execution reproduction management processing unit 1 of FIG.
08 generates a program execution result from the trace result of the trace result storage memory 412 and the program source of the program source storage memory 413 according to the reproduction information input from the keyboard 27 according to a predetermined procedure, and C
It is reproduced and displayed on the RT display 26.

FIG. 13 shows the program execution reproduction processing section 1
31 is a flowchart showing the operation of 31. First, at step 132, the reproduction information 1312 necessary for execution reproduction of the program input from the keyboard 27 is written in the data storage memory 44. In step 133, the starting slot number k of the reproduction information is retrieved from the data storage memory 44. Step 13
At 4, the trace result extraction processing 134 shown in FIG. 14 is executed.

In the flow chart of FIG. 14, step 142
At step 144, the slot 147 indicated by the slot number k of the ring buffer 127 of the trace result storage memory 412 is indexed. Then, at step 144, the trace result is extracted from the slot 147 and the trace result storage area of the data storage memory 44 is obtained. Save to 1313. Then, the trace result extraction processing 134 is terminated and the process returns to the flowchart of FIG.

In the flow chart of FIG. 13, the program execution reproduction display processing 135 shown in FIG. 15 is executed. When the flow chart of FIG. 15 is started, in step 152, the relevant program number of the reproduction information is fetched from the data storage memory 44, and then in step 153, the program source storage memory 413 to the program source 1318 based on it.
Take out. Next, at step 154, the trace result is retrieved from the trace result storage area 1313 of the data storage memory 44. Next, in step 155, the trace result is assigned to the program source and the program execution result is displayed on the CRT display 26 according to a predetermined procedure. Then, the program execution reproduction display processing 135 is terminated and the original flow chart of FIG. 13 is returned to. In the flowchart of FIG. 13, the slot number k is updated at step 136. In step 137, the stop flag 1314 shown in FIG. 13 is checked from the data storage memory 44 to check whether there is a stop request.

If there is no stop request, the execution cycle (control cycle) which is the reproduction information 1312 is fetched from the data storage memory 44 in step 138 and delayed by that time. After that, the process returns to step 134 again, and the trace result extraction processing is repeatedly executed.

Then, in step 139, if there is a stop request, the stop flag is cleared and the program execution reproduction process 108 is ended. The program execution stop processing unit 109 of the programming device 21 in FIG. 10 stops the program execution reproduction process according to the program execution request input from the keyboard 27 according to a predetermined procedure.

FIG. 16 shows the program execution stop processing section 1
It is a flowchart which shows the operation | movement of 09. When the flow chart is started, in step 162, the stop flag 1314 of the data storage memory 44 is set, and this processing ends.

The transmission processing unit 1010 in FIG. 10 transmits a transmission request for data or the like requested by another processing unit according to a predetermined procedure to the programmable controller device 23 according to a predetermined procedure. Also, this transmission processing unit 10
Reference numeral 10 notifies other processing units of data and the like received from the programmable controller device 23 according to a predetermined procedure according to a predetermined procedure.

Next, the operation of the programmable conciroller system thus configured will be described. First, the operator uses the keyboard 27 of the programming device 23 to write a program in the program storage memory 34 of the programmable controller device 23 according to a predetermined procedure. Then, this programmable controller system is started. Then, when the programmable controller device 23 generates an interrupt for each control cycle, the program is automatically executed.

When the operator inputs a trace start request from the programming device 23 according to a predetermined procedure, the programmable controller device 23 is notified of the trace start request according to a predetermined means, and necessary trace start request information is written. As a result, in the programmable controller device 23, the trace start condition is checked every time the program corresponding to the trace start request information is executed prior to the execution of the program according to a predetermined means, and if the trace start condition is satisfied, a trace interrupt is generated. Then, the trace result is automatically stored in time series in the trace result storage memory 311.

Thereafter, the trace stop condition stored in the data storage memory 35 is checked, and if the trace stop condition is satisfied, the trace interrupt is prohibited and the collection of the trace result is automatically stopped.

Further, the operator is the programming device 2
When a trace result read request is input from 1 according to a predetermined procedure, the trace result is read from the programmable controller device 23 to the programming device 21 according to a predetermined means. When the operator inputs a program execution reproduction request to the programming device 21 according to a predetermined procedure, the execution state of the target program is CRT according to a predetermined means based on the trace result read from the programmable controller device 23 by the request. It is reproduced and displayed on the display 26. When the operator inputs a program execution reproduction stop request to the programming device 21 according to a predetermined procedure, the execution reproduction operation of the program is stopped.

[0075]

As described above, according to the programmable controller device of the present invention, the operating state of the program being executed is traced by designating an arbitrary range, and the trace result is stored and held in the trace result storage memory. ing. Therefore, by reading the stored contents of the trace result storage memory, the operating state at an arbitrary position in the program can be grasped.

Further, according to the programming device of the present invention, by connecting the programming device to the programmable controller device of the above invention, the operator can display the execution state of the program in the programmable controller device at an arbitrary position on the display screen. I can confirm.

Further, in the programmable controller system of the present invention, the above-mentioned devices of the respective inventions are combined. Therefore, the execution state of the program collected in real time of the programmable controller device can be reproduced and displayed on the programming device, and the behavior of the program and the execution analysis can be accurately performed. Therefore, work such as abnormality diagnosis and analysis of the control program at the site in plant control becomes very easy.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a schematic configuration of the present invention.

FIG. 2 is a schematic diagram showing an entire programmable controller system according to an embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a programmable controller device of the system of the embodiment.

FIG. 4 is a schematic configuration diagram of a programming device of the system of the embodiment.

FIG. 5 is a diagram showing a configuration of each processing unit of the programmable controller device of the system of the embodiment.

FIG. 6 is a flowchart showing an operation of a program execution management processing unit of the programmable controller device.

FIG. 7 is a flowchart showing the operation of trace start / stop determination parts of the programmable controller device.

FIG. 8 is a diagram showing a start procedure of a trace result storing process of the programmable controller device.

FIG. 9 is a flowchart showing the operation of a trace result storage processing unit of the programmable controller device.

FIG. 10 is a diagram showing a configuration of each processing unit of the programming device of the system of the embodiment.

FIG. 11 is a flowchart showing the operation of a trace start request processing unit of the programming device.

FIG. 12 is a flowchart showing the operation of a trace result read processing unit of the programming device.

FIG. 13 is a flowchart showing the operation of a program execution reproduction management processing unit of the programming device.

FIG. 14 is a flowchart showing the operation of a trace result extraction processing unit of the programming device.

FIG. 15 is a flowchart showing program execution reproduction processing in the programming device.

FIG. 16 is a flowchart showing the operation of a program execution reproduction stop processing section of the programming device.

[Explanation of symbols]

21 ... Programming device, 23 ... Programmable controller device, 26 ... CRT display, 27 ... Keyboard, 34 ... Program storage memory, 35, 44 ... Data storage memory, 311, 412 ... Trace result storage memory, 413 ... Program source storage memory.

Claims (7)

[Claims] 1. A programmable program capable of executing a control process on a control target at a predetermined control cycle using a control program and tracing an execution state of an arbitrary range in the program being executed for each instruction. In the controller device, a trace result storage memory for storing a plurality of trace results, a trace start / stop means for starting / stopping the trace in response to a trace start / stop command, and a trace execution period for each control cycle. A programmable controller device comprising trace result storage means for storing each obtained trace result in the trace result storage memory in time series. 2. The trace result storage memory has a ring buffer structure in which a plurality of slots are connected in a ring shape, and the trace result storage means stores the trace result in each of the annularly connected slots in order. The programmable controller device according to claim 1, wherein 3. A trace storage start condition, a trace stop condition, and a data storage memory for storing a delay time from establishment of the trace stop condition to a trace stop, wherein the trace start / stop means stores in the data storage memory. 2. The programmable controller device according to claim 1, wherein the trace is started and stopped based on each stored condition and delay time. 4. A trace result storage memory for storing a plurality of trace results, and a trace result for each control cycle of a control program in a connected programmable controller device is read from the programmable controller device and the trace is performed. Trace result transfer means for writing in a time series to the result storage memory; trace result extraction means for extracting each trace result stored in the trace result storage memory by designating an arbitrary time zone; and the programmable controller device A program source storage memory for storing the same program as the program, program information read from the program source storage memory, and trace results fetched by the trace result fetching means are compared and collated to the programmable controller device. A program execution reproduction display means for reproducing displaying the execution state of the program takes, programming device and a program execution reproduction management unit to execute at the specified trace results retriever and program execution reproduction display unit period. 5. The program execution reproduction management means specifies the extraction start position in the trace result storage memory to the trace result extraction means, and stores the trace result obtained by the trace result extraction means and the program source storage. 5. The programming device according to claim 4, wherein the designation information of the corresponding program in the memory is given to the program execution reproduction display means. 6. A reproduction stop request generating means for transmitting a trace start / end command to the programmable controller device and a transfer start / end command to the trace result transfer means. Programming equipment. 7. A programmable program capable of executing a control process on a controlled object at a predetermined control cycle using a control program and tracing an execution state of an arbitrary range in the program being executed for each instruction. A programmable controller system comprising a controller device and a programming device which is connected to the programmable controller device and reproduces and displays an execution state of a program in the programmable controller device, wherein the programmable controller device stores a plurality of trace results. A first trace result storage memory, a trace start / stop means for starting / stopping the trace according to a trace start / stop command, and a trace result obtained for each control cycle during the trace execution period. 1 to Trace result storage means for storing the result in a time series in a source result storage memory, the programming device includes a second trace result storage memory for storing a plurality of trace results, and the programmable controller device. Trace result transfer means for reading each trace result stored in the first trace result storage memory and writing the trace results in the second trace result storage memory in time series, and stored in the second trace result storage memory. Trace result extraction means for extracting each trace result by designating an arbitrary time zone, a program source storage memory for storing the same program as the program of the programmable controller device, and each program read from the program source storage memory Information and each tray extracted by the trace result extraction means Program execution reproduction display means for displaying the execution status of the program in the programmable controller device by comparing and collating the source execution result with the program execution reproduction means for executing the trace result extraction means and the program execution reproduction display means at a designated cycle. A programmable controller system comprising: a management unit.