JP3452241B2 - Program determination display method and apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program discriminating and displaying method and apparatus, and more specifically, it is loaded from a ladder circuit created by a ladder editor, a ladder circuit constituting a ladder program uploaded from a programmable controller, a floppy disk or a hard disk. The present invention relates to a program discriminating and displaying method and device for discriminating normality and abnormality of a ladder circuit which constitutes a ladder program and displaying the discriminably.

[0002]

2. Description of the Related Art In recent years, a programmable controller (PLC) for controlling a sensor, an actuator, etc., includes a CPU unit 50 and an NC unit etc. connected to the CPU unit 50 via a system bus 90 as shown in FIG. It comprises a high-performance I / O unit 60 and a communication unit 70 for transmitting / receiving data to / from other communication units.

The CPU unit 50 controls the high-performance I / O unit 60 and the communication unit 70 on the rack, and the tool cable 10 is also provided.
A tool (application software) 1 for setting data via 0 and a personal computer 80 for running a tool 2 (application software) for executing monitoring by the high-performance I / O unit 60 are connected.

The high-performance I / O unit 60 carries out special control such as NC control and PID control.

The communication unit 70 is another CPU unit 50 or a high-performance I / O unit 60 which is another node.
To send and receive data.

[0006]

By the way, in the programmable controller system described above, each programmable controller is drive-controlled by a ladder program, and it is professional to judge whether each ladder circuit of this ladder program is normal or abnormal. It requires a lot of knowledge and is very time-consuming, which has been a major problem in system operation.

In view of the above-mentioned problems, the present invention automatically determines whether each ladder circuit of the ladder program used in the programmable controller is normal or abnormal, and displays it in a distinguishable manner. It is an object to provide a method and a device.

[0008]

In order to achieve the above-mentioned object, in the present invention, the normality of each ladder circuit of a ladder program used in a programmable controller,
An abnormality is automatically discriminated, and the ladder circuit discriminated as an abnormality is configured so that the abnormality can be easily and quickly identified by the user by changing and displaying the color of the left busbar.

That is, according to the first aspect of the invention, in the program discriminating and displaying method for discriminating and displaying the ladder program used in the programmable controller, the ladder circuit is created by the ladder editor, and normality and abnormality of the created ladder circuit are checked. If it is determined that the ladder circuit is abnormal, the color of the left busbar of the created ladder circuit is changed and displayed.

According to a second aspect of the present invention, in a program discriminating and displaying method for discriminating and displaying a ladder program used in a programmable controller, a ladder program is uploaded from the programmable controller, and a ladder circuit is loaded from the uploaded ladder program. It is characterized in that the cut-out ladder circuit is cut out one by one, and whether the cut-out ladder circuit is normal or abnormal is judged.

According to a third aspect of the present invention, in the program discriminating display method for discriminating and displaying the ladder program used in the programmable controller, the saved ladder program is loaded into the external storage device, and the ladder circuit is loaded from the loaded ladder program. Are cut out one by one, and the cut-out ladder circuit is judged to be normal or abnormal, and if judged to be abnormal, the color of the left bus bar of the cut-out ladder circuit is changed and displayed.

According to a fourth aspect of the present invention, in a program discriminating display device for discriminating and displaying a ladder program used in a programmable controller, a cutting means for cutting one ladder circuit from the ladder program, and the cutting means. And a display control unit for changing and displaying the color of the left busbar of the ladder circuit determined to be abnormal by the determination unit. And

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A program discrimination display method and device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of a programmable logic controller system configured by applying the program discrimination display method and apparatus according to the present invention.

Programmable logic controller system of this embodiment (hereinafter referred to as PLC system)
Is a first programmable controller (hereinafter, referred to as a first P) that controls devices to be controlled such as sensors and actuators.
It is composed of an LC 1) and a second programmable controller (hereinafter referred to as a second PLC) 1a, and a personal computer (hereinafter referred to as a personal computer) 2 that operates a tool described later.

The first PLC 1 is a CPU unit 11
, A high function unit 12 and a communication unit 13, which are connected to a system bus 14 including a data bus, an address bus and the like.

The CPU unit 11 controls the high-performance I / O unit 12 and the communication unit 13 on the rack, and the personal computer 2 via the tool cable 3.
And is configured to execute a predetermined process of the tool received from the personal computer 2.

The CPU unit 12 is a microcomputer 1 for controlling the CPU unit itself.
11 and the microcomputer 111 are the system bus 1
A microcomputer bus ASIC 112 that provides an interface for accessing each of the units 12 and 13 via
A memory 113 that stores a plurality of data received from the tool (hereinafter referred to as a command message) and also stores transmission data to be transmitted to the tool (referred to as a response message), and a communication processing program that stores a communication processing program that performs communication processing. And a memory 114.

The high-performance I / O unit 12 is a unit for performing special control, such as an NC unit, and includes a microcomputer 121 for controlling the high-performance I / O unit itself, a system bus 14, and this. A bus ASIC 122 for interfacing the units, and C
Command and C sent from PU unit 11
It is configured to have a memory 123 that stores a response to be transmitted to the PU unit 11.

The communication unit 13 is the CPU unit 11
The command message received from the communication unit is transmitted to a communication unit included in another connected node, and a response to the command message is received and transmitted to the CPU unit 11. Microcomputer 131 for controlling
And a bus ASIC 132 for interfacing the system bus 14 with this unit, and a memory 133 for storing a command or the like transmitted from the CPU unit 11 and a response message transmitted to the CPU unit 11. .

The personal computer 2 is capable of displaying a plurality of windows on the display screen, and a plurality of tools 21 (application software) (tools # 1 and # 2 in the drawing) are used by using the windows. 21) is executed.

In the PLC system of this embodiment, the ladder circuit created by the ladder editor, the first
The normal or abnormal state of the ladder circuit that constitutes the ladder program uploaded from the PLC1 or the second PLC1a, or the ladder circuit that constitutes the ladder program loaded from the floppy disk or hard disk is discriminated by the personal computer 2, and this is displayed on the personal computer 2. It is configured so that it can be displayed by the user in an identifiable manner.

FIG. 2 is a functional block diagram showing the program discrimination display processing in this embodiment.

In FIG. 2, this program discrimination display processing is as follows: 1) Ladder circuit 2 created by the ladder editor 201) Floppy disk or hard disk (FD /
HD) Ladder circuit cut out by the ladder circuit cut-out unit 204 from the ladder program loaded 202) 3) Ladder circuit cut out by the ladder circuit cut-out unit 204 from the ladder program uploaded 203 from PLC a) Is the ladder circuit established? b) Is the instruction in the ladder circuit supported by the target programmable controller? c) Is all the instructions in the ladder circuit full of operands? d) The operand in the ladder circuit is supported by the target programmable controller If at least one of the above a) to d) is not established, it is regarded as an error and the error determination unit 21 is checked.
In this case, the colors of the bus lines in the ladder diagram are changed and displayed on the ladder screen 214.

That is, the ladder circuits created by the ladder editor 201 are input to the ladder diagram display unit 205 one by one.

The ladder program loaded from the floppy disk or hard disk (FD / HD) and the ladder program uploaded from the PLC are input to the ladder circuit cutout unit 204, where the ladder circuit configured by the ladder program is 1 The circuits are cut out and input to the ladder diagram display unit 205.

The ladder diagram display unit 205 is loaded from a ladder circuit or a floppy disk or a hard disk (FD / HD) created by the ladder editor 201 and uploaded from the ladder circuit or PLC cut out one circuit at a time by the ladder circuit cutout unit 204. The ladder circuit cutout unit 204 converts the ladder circuits cut out one by one into a ladder diagram, and the screen synthesis unit 213
Output to.

On the other hand, the instruction error checking unit 208 refers to the instruction information stored in the instruction database (instruction DB) 206 to check whether the instruction in the ladder circuit is supported by the target programmable controller.

Further, the operand presence / absence checking unit 209
Refers to the instruction information stored in the instruction database (instruction DB) 206 to check whether or not all the instructions in the ladder circuit have an operand shortage.

Further, the operand error check unit 210
Is the operand database (operand DB) 207
It is checked whether the operand in the ladder circuit is supported by the target programmable controller by referring to the operand information stored in.

The error discriminating unit 211, based on the outputs of the instruction error checking unit 208, the operand presence / absence checking unit 209, and the operand error checking unit 210,
Whether or not there is an error in the ladder circuit is determined, and the determination result is notified to the left bus bar display unit 212.

The left bus bar display section 212 is provided with an error determination section 21.
Based on the judgment result of 1, the image generating unit 21
Output to 3. Here, the left bus bar display unit 212 outputs a normal color bus line of the ladder diagram when the error determination unit 211 determines that there is no error, and when the error determination unit 211 determines that there is an error, Output a bus of a color different from the normal color of the ladder diagram.

The image synthesizing unit 213 includes a ladder diagram display unit 20.
The ladder diagram output from No. 5 and the bus diagram of the ladder diagram output from the left bus bar display unit 212 are combined, and this is combined with the ladder screen 2
14 is displayed.

Next, the details of the program discrimination display processing shown in FIG. 2 will be further described with reference to the flow charts shown in FIGS.

FIG. 3 is a flow chart showing the program discrimination display processing shown in FIG. 2 when the user creates a ladder circuit with the ladder editor 201.

In FIG. 3, first, the user creates a ladder circuit with the ladder editor 201 (step 30).
1).

Next, it is checked whether the created ladder circuit is established (step 302). If the created ladder circuit is established (YES in step 302), then,
It is checked whether or not the instruction in the created circuit is supported by the target PLC (step 303).

If the target PLC supports the instructions in the created circuit (YES in step 303), it is then checked whether all the instructions in the created circuit have sufficient operands. Check (step 304).
If it is determined that there is no shortage of operands in all the instructions in the created circuit (YES in step 304).
S), the operand in the created circuit is the target PLC
Check if it is supported by (step 305).

Here, if it is determined that the operand in the created circuit is supported by the target PLC,
Since this ladder circuit is normal, the color of the left busbar of the ladder circuit is not changed (step 306).

However, if it is determined in step 302 that the created ladder circuit is not established (step 3
(NO at 02), or at step 303, if it is determined that the instruction in the created circuit is not supported by the target PLC (NO at step 303), or
If it is determined in step 304 that the instruction in the created circuit has insufficient operands (NO in step 304), or the operand in the created circuit is supported by the target PLC in step 305. If it is determined that the ladder circuit is not present (NO in step 305), it is determined that the ladder circuit is abnormal, and the color of the left bus line of the ladder circuit is changed (step 307).

FIG. 4 is a flow chart showing the program discrimination display processing shown in FIG. 2 when the ladder program is uploaded from the PLC.

In FIG. 4, first, the ladder program is uploaded from the PLC and the ladder circuits are cut out one by one (step 311).

Next, it is checked whether or not the cut-out ladder circuit is established (step 312). If the cut-out ladder circuit is established (YES in step 312), the next instruction in the cut-out circuit is checked. Is supported by the target PLC (step 313).

If the instruction in the cut-out circuit is supported by the target PLC (step 31
Then, it is checked whether or not all the instructions in the cut-out circuit have a shortage of operands (step 31).
4). Here, if it is determined that all the instructions in the cut out circuit have sufficient operands (step 314).
YES), it is checked whether the operand in the cut out circuit is supported by the target PLC (step 3).
15).

If it is determined that the operand in the cut-out circuit is supported by the target PLC, this ladder circuit is normal and the color of the left busbar of the ladder circuit is not changed (step 316). .

However, if it is determined in step 312 that the cut-out ladder circuit is not established (NO in step 312), or in step 313, the instruction in the cut-out circuit is supported by the target PLC. If it is determined that there is no operand (NO in step 313), or if it is determined in step 314 that there is a lack of operands in the instruction in the cut out circuit (step 3)
(NO in step 14), or if it is determined in step 315 that the operand in the cut out circuit is not supported by the target PLC (N in step 315).
O), change the color of the left bus line of the ladder circuit as an abnormality (step 317).

Incidentally, the above steps 312 to 3
The processes up to 17 are repeated for the number of cut ladder circuits.

FIG. 5 shows the saved ladder program as a floppy disk or hard disk (FD / HD).
3 is a flowchart showing the program discrimination display processing shown in FIG. 2 in the case of loading from.

In FIG. 5, first, the saved ladder program is loaded from a floppy disk or hard disk (FD / HD) and the ladder circuits are cut out one by one (step 321).

Next, it is checked whether the cut-out ladder circuit is established (step 322). If the cut-out ladder circuit is established (YES in step 322), then the instruction in the cut-out circuit is executed. Is supported by the target PLC (step 323).

If the instruction in the cut-out circuit is supported by the target PLC (step 32)
Then, it is checked whether or not all the instructions in the cut-out circuit have a lack of operands (step 32).
4). If it is determined that there is no operand shortage in all the instructions in the cut out circuit (step 324).
YES), it is checked whether the operand in the cut out circuit is supported by the target PLC (step 3).
25).

If it is determined that the operand in the clipped circuit is supported by the target PLC, this ladder circuit is normal and the color of the left busbar of the ladder circuit is not changed (step 326). .

However, if it is determined in step 322 that the cut ladder circuit is not established (NO in step 322), or in step 323, the instruction in the cut circuit is supported by the target PLC. If not (NO at step 323), or if it is determined at step 324 that there is an operand shortage in the instruction in the cut out circuit (step 3)
No in step 24), or if it is determined in step 325 that the operand in the cut out circuit is not supported by the target PLC (N in step 325).
O), change the color of the left busbar of the ladder circuit as an abnormality (step 327).

Incidentally, the above steps 322 to 3
The processes up to 27 are repeated by the number of cut ladder circuits.

FIG. 6 is a diagram showing a display example when the ladder circuit displayed on the ladder screen is abnormal.

In FIG. 6, the red vertical line (bus bar) indicates that the circuit is not established. If the circuit is established here, the red vertical line (bus line) disappears when the circuit is established.

In the PLC system of this embodiment, it is possible to automatically jump to an error point or an address use point on the ladder screen.

That is, as shown in FIG. 7, when there is an error location, it is possible to jump to the error location causing the error by looking at the program check result.

Further, as shown in FIG. 8, when it is desired to see which other instruction is using the address, the cursor is moved to the position of the contact or coil which specifies the address, and the cross reference is directly applied. Can be displayed. Furthermore, it is possible to jump to that location and sort the command words.

[0060]

As described above, according to the first aspect of the invention, the ladder used in the programmable controller is used.
In the program discrimination display method for discriminating and displaying a program, a ladder circuit is created with a ladder editor, and whether the created ladder circuit is normal or abnormal is discriminated. If the ladder circuit is discriminated as abnormal, the color of the left busbar of the created ladder circuit Since it is configured to be changed and displayed, it becomes possible to automatically discriminate between normality and abnormality of the ladder circuit created by the ladder editor and display this in a distinguishable manner.

According to a third aspect of the present invention, in the program discrimination display method for discriminating and displaying the ladder program used in the programmable controller, the ladder program is uploaded from the programmable controller, and the ladder circuit is updated from the uploaded ladder program. The programmable controller is configured so that the cut-out ladder circuit is judged to be normal or abnormal, and if it is judged to be abnormal, the color of the left busbar of the cut-out ladder circuit is changed and displayed. It will be possible to automatically discriminate between normality and abnormality of the ladder circuit that constitutes the ladder program uploaded from, and display this in a distinguishable manner.

According to a fifth aspect of the invention, in the program discriminating display method for discriminating and displaying the ladder program used in the programmable controller, the saved ladder program is loaded into the external storage device, and the ladder circuit is loaded from the loaded ladder program. It is configured to cut out one by one, determine whether the cut-out ladder circuit is normal or abnormal, and change the color of the left bus bar of the cut-out ladder circuit to display when abnormal is determined. It becomes possible to automatically discriminate between normality and abnormality of the ladder circuit which constitutes the ladder program loaded from the external storage device and display them in a distinguishable manner.

According to a seventh aspect of the present invention, in a program discriminating display device for discriminating and displaying a ladder program used in a programmable controller, a cutting means for cutting one ladder circuit from the ladder program, and the cutting means. And a display control unit for changing the color of the left bus bar of the ladder circuit that is determined to be abnormal by the determination unit and displaying the changed color. Therefore, it is possible to provide a program discriminating / displaying device which automatically discriminates normality / abnormality of each ladder circuit of the ladder program used in the programmable controller and displays the discriminably.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a programmable logic controller system configured by applying a program discrimination display method and device according to the present invention.

FIG. 2 is a functional block diagram showing a program discrimination display process according to this embodiment.

FIG. 3 is a flowchart showing a program discrimination display process shown in FIG. 2 when a user creates a ladder circuit with a ladder editor.

FIG. 4 is a flowchart showing the program discrimination display processing shown in FIG. 2 when uploading a ladder program from a PLC.

FIG. 5 is a flowchart showing the program discrimination display processing shown in FIG. 2 when the saved ladder program is loaded from a floppy disk or a hard disk (FD / HD).

FIG. 6 is a diagram showing a display example when the ladder circuit displayed on the ladder screen is abnormal.

FIG. 7 is a diagram illustrating an automatic jump to an error point on the ladder screen according to this embodiment.

FIG. 8 is a diagram for explaining an automatic jump to a location where an address is used on the ladder screen according to this embodiment.

FIG. 9 is a block diagram showing an example of a conventional programmable logic controller system.

[Explanation of symbols]

1,1a Programmable controller 11 CPU unit 111 Microcomputer 112 Bus ASIC 113 memory 114 communication processing program storage memory 12 High-performance unit 121 Microcomputer 122 Bus ASIC 123 memory 13 Communication unit 131 Microcomputer 132 Bus ASIC 133 memory 14 system bus 2 personal computer 3 tool cable

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

Claims (4)

(57) [Claims] 1. A program discriminating display method for discriminating and displaying a ladder program used in a programmable controller, wherein a ladder circuit is created by a ladder editor, and the created ladder circuit is judged to be normal or abnormal, and it is judged as abnormal. In this case, the program discrimination display method is characterized in that the color of the left busbar of the created ladder circuit is changed and displayed. 2. A program discrimination display method for discriminating and displaying a ladder program used in a programmable controller, wherein a ladder program is uploaded from the programmable controller, ladder circuits are cut out one by one from the uploaded ladder program, and the cut ladder A program discriminating and displaying method characterized by discriminating between normality and abnormality of the circuit, and when it is determined to be abnormal, changing the color of the left bus bar of the cut-out ladder circuit for display. 3. A program discrimination display method for discriminating and displaying a ladder program used in a programmable controller, loading a saved ladder program in an external storage device, cutting out ladder circuits one by one from the loaded ladder program, and cutting out the ladder circuits one by one. A program discriminating and displaying method, characterized in that the ladder circuit is normally or abnormally discriminated, and when the ladder circuit is discriminated as abnormal, the color of the left busbar of the clipped ladder circuit is changed and displayed. 4. A program discriminating and displaying device for discriminating and displaying a ladder program used in a programmable controller, a cutting means for cutting one ladder circuit from the ladder program, and a normal ladder circuit cut out by the cutting means. A program discriminating display device comprising: discriminating means for discriminating each abnormality, and display control means for changing and displaying the color of the left busbar of the ladder circuit discriminated as abnormal by the discriminating means.