JPH06282313A - Method and device for monitoring facility - Google Patents

Abstract

PURPOSE:To release the sequencer side from the monitoring of an facility by providing a memory to be accessed by a data processing part and storing macro definition for defining the processing procedure of an equipment status signal for monitoring the equipment. CONSTITUTION:A logging memory 404 and a program memory 405 are provided in a monitoring device 400 and a table having the same contents as that of a device memory which is arranged on the sequencer side in a convensional method is stored in a device memory 403. The memory 405 stores display control macro defined by a user and logging control macro. The memory 404 has a function as a buffer memory for storing the status data of the facility and stores the transition of the equipment status in accordance with the logging control macro defined by the user. Since an independently defined macro- program is used for logging or display control, the equipment can simply be monitored without applying load to the sequencer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for monitoring the sequence operation of production equipment controlled by a sequencer or the like.

[0002]

2. Description of the Related Art In a production line such as an automobile assembly line, a sequence control unit having a built-in computer is provided for various installed facilities, and the sequence control unit performs a sequence of operations to be performed by each facility. It is known to have control.
In such sequence control, a control program is loaded into a computer incorporated in the sequence control unit, and the sequence control unit sequentially advances each step of operation control for each of various equipment installed in the production line in accordance with the sequence operation control program. It is designed to work.

[0003]

In such a production facility management system, a display for an operator to grasp the operating state of the facility is inevitable. In such a display, for example, the operating state of the equipment and the failure location are displayed. FIG. 1 shows a conventional production facility management system. This system is controlled equipment 200
, Sequencer 100, monitor control device 300, C
The RT monitor 301. The sequencer 100 and the equipment are connected to the CPU 2 via the I / O port 5. The CPU 2 controls the equipment 200 according to a program stored in the program memory 3, and the connection state of devices such as various actuators and sensors of the equipment 200 is monitored by a device table stored in the device memory 4. .

When the contents to be displayed on the CRT monitor 301 occur in the system, the CPU 2 sends the display data via the serial controller 6. In such a conventional system, the following problems have occurred. : Since the sequencer 100 creates display data and controls display, the load on the sequencer 100 is increased, and much time is required to develop a program for such a large-scale sequencer. : For example, in order to log the data on the operating state of the equipment, conventionally, the data is logged by using a special command in the sequencer program. Also, for example, a program for displaying the operating state of the equipment has conventionally been controlled by using special instructions in the sequencer program.

As described above, in the past, since the data log and the display of the operating state were all controlled by the program in the sequencer, the development of the program was complicated and the maintenance was very troublesome. Was there. Therefore, the present invention proposes a facility monitoring method and device in which a program separate from a sequencer controller can be executed on the display device side, and the program uses a macro definition for facility monitoring.

[0006]

A method for monitoring equipment according to the present invention for achieving the above object is a method for monitoring equipment operated by a sequence controller, which is a monitor control method independent of the sequence controller. A macro that defines a procedure for processing status signal data of the equipment for monitoring the equipment in the memory, and a memory that can be accessed by the data processing portion. It is characterized by storing the definition.

[0007]

The preferred embodiments of the monitoring method and apparatus of the present invention will be described below. FIG. 2 is a block diagram of the monitoring system of this embodiment.
1 shows a monitor device 400 for performing control to display a monitoring result of the operation of the equipment 200 of the sequencer 100 when 0 controls the equipment 200.

The monitor device 400 is characterized in that a logging memory 404 and a program memory 405 are provided inside. Further, in the monitor device 400, a table having the same content as the device memory on the sequencer side in the related art is stored in the device memory 403. The program memory 405 stores a display control macro and a logging control macro defined by the user, as shown in FIG.

The logging memory 404 has a function as a buffer memory for storing data on the state of the equipment, and changes in the state of the equipment are recorded according to a logging control macro defined by the user. The display control macro defines and controls the CRT display. FIG. 3 conceptually shows the function of the macro definition layer which is characteristic of this embodiment. The macro definition layer is
As described above, the display control macro and the logging control macro are included.

FIG. 5 shows the program structure in the ROM 407. In the figure, the operating system 500 (O
S) schedules and manages the program of the entire system. Further, the interpreter 501 interprets and executes a macro program. The macro consists of a command part and a parameter part. The logging macro is L (P ₁ , P ₂ , P
₃ , P ₄ , P ₅ ), where L is the logging mnemonic code. Further, P _{1 is a} device to be logged, P _{2 is a} logging data length, P ₃ is an area number in the logging buffer, P _{4 is the} number of times of logging, and P ₅ is a condition for starting logging. Here, the device is a device such as an actuator or a sensor of equipment. These devices include
As known to the user, numbers are assigned in sequence. As an example of the logging macro, for example, L (A010, 16, 2, 10, B001 +): When the device B001 is turned on, 16 bits (A010 to A01F) from the device A010 are fetched into the area of the number 2 of the memory 404 ten times. finish. L (A010, 16, 2, 10, B001-): When the device B001 is turned off, 16 bits (A010 to A01F) from the device A010 are fetched into the area of No. 2 of the memory 404 10 times and the process is terminated. L (A010, 16, 2, +, B001-): When the device B001 is turned off, 16 bits (A010 to A01F) from the device A010 are fetched into the area of number 2 of the memory 404. Capture continues until the area is full. L (A010, 16, P1, +, B001-): When the device B001 is turned off, the 16 bits (A010 to A01F) from the device A010 are sent to the CPU.
The data is output to the port # 1 of the I / O port of the 402.

Next, the display control macro will be described.
FIG. 6 shows a state of cell division of the display screen of the CRT device 407. That is, the display screen is divided into 15 logic cells. Attach one macro definition to each cell (att
ach) is possible. Display control macro is D
It has a format of (P ₁ , P ₂ , P ₃ , P ₄ , P ₅ ), and D is a mnemonic code for display. Further, P _{1 is a} display target device, P _{2 is a} display screen number, P _{3 is a} display figure number, P ₄ is a cell number on the screen, and P ₅ is a condition for starting display. As an example of the display macro command, for example, D (A010, 3, 2, 10, B001 +): When the device B001 is turned on, the state of the device A010 is previously stored in the cell number 10 of the screen number 3 registered in advance. The registered number 2 graphic is displayed. D (A010, 16, 2+, 10, B001 +): When the device B001 is turned on, the state of the device A010 is changed to the cell of the number 10 of the screen of the number 3 registered in advance and the figure of the number 2 registered in advance is displayed. Display while flickering.

In the display control macro, a program including the above commands and the like is stored in advance. The macro command itself has a structure of selecting a screen to be displayed and selecting a cell. In other words, the macro program itself defines the procedure for controlling the screen. Thus, by using the separately defined macro program for logging and display control, the equipment can be easily monitored without burdening the sequencer 100.

Next, a modified embodiment will be described in which the screen control procedure is provided not in the macro but in the cell itself. FIG. 7 is a table that stores the relationship between each cell and the macro definition attached to the cell in this modification. In FIG. 7, the screen number is a number given to one screen layout designed in advance. In other words, a plurality of screen layouts can be set, and a desired screen layout can be called by specifying a screen number. As described above, one screen has 15 cells. The display position of one cell is
This can be changed by changing the address stored in the "cell position" field. "Macro number" is the number of the macro definition attached to the cell.

The screen number can be changed by the user by designating the screen number with the icon on the CRT screen. Further, the failure diagnosis display program can specify the screen number. FIG. 8 is a control procedure of the display control program of the CPU 402 according to this modification. In step S2, it is determined whether the user has selected the screen number. The user selects the desired screen by this selection. Without the user having to select a screen
The failure diagnosis display program may forcibly display the failure status display screen in order to detect the failure location and call the user's attention. Therefore, the CPU 402 checks in step S12 whether the screen number has been received from the failure detection program.

When the screen number is received in step S4 or step S14, in step S6,
The table of FIG. 7 is searched and the macro program attached to each cell of the screen is called. And
In step S8, the macro program attached to each cell is executed. In step S10, display is performed based on the macro execution result. For example, if a macro program such as M (3, 2, 10, [A010]) D (A010, 3, 2, 10, B001 +) INC (C001) is attached to the 10th cell of screen number 3, To do. Where M (3,
2, [A010]) means that the name of the device A010 is MO in the predetermined area of the display symbol 10 for the 10th cell of screen number 3.
It is an instruction to VE. Well, if the failure detection program 50
2 detects a failure that requires screen number 3, this detection program 502 causes the display program 503 to
Screen number 3 is given to (FIG. 8) (step S1).
4). Then, in step S6, the macro attached to all the cells of screen number 3 is executed. Since the above macro program is attached to the cell with the number 10, if the sensor device B001 is on at this point, the state of the actuator device A010 is changed to "10th cell". Actuator XXXX has failed. ”Is displayed. Incidentally, here, the figure 2 registered in advance is "YYYYXXXX is out of order".

Such a modification is efficient because the user or only the macro program of the screen which the failure detection program actually needs to display is executed. The present invention can be variously modified without departing from the spirit thereof. For example, in the above embodiment, the device table is provided on both the sequencer side and the monitor device 400 from the viewpoint of processing speed, but only one of them may be provided.

[0017]

As described above, the monitoring method and apparatus of the present invention is a monitoring method for monitoring equipment operated by a sequence controller, and performs data processing for monitor control separately from the sequence controller. Provided is a data processing unit for performing and a memory accessible by the data processing unit, and storing in the memory a macro definition for defining a procedure for processing status signal data of the equipment for monitoring the equipment. Since the sequencer side is freed from equipment monitoring, the sequencer side can concentrate on efficient sequence control, and the program on the sequencer side can be simplified, so that its maintenance is simple. On the other hand, on the monitor device side, the monitoring function is defined by a macro, so that its development / maintenance is easy.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a conventional equipment monitoring system.

FIG. 2 is a block diagram of a monitoring system according to a preferred embodiment of the present invention.

FIG. 3 is a diagram illustrating a macro stored in a program memory according to the embodiment of FIG.

FIG. 4 is a diagram conceptually explaining the operation of the embodiment.

FIG. 5 is a diagram showing a configuration of various programs stored in a ROM 402 of the embodiment.

FIG. 6 is a diagram showing an example of cell division of a display screen in the embodiment.

FIG. 7 is a diagram illustrating a relationship between a cell and a macro attached to the cell in a modified example.

FIG. 8 is a diagram illustrating a control procedure of a display program in a modified example.

FIG. 9 is a diagram illustrating a display example according to a modified example.

Claims (5)

[Claims] 1. A monitoring method for monitoring equipment operated by a sequence controller, comprising: a data processing unit for performing data processing for monitor control separately from the sequence controller; and a memory accessible by the data processing unit. And a macro definition that defines a procedure for processing the status signal data of the equipment for monitoring the equipment is stored in the memory. 2. The equipment monitoring method according to claim 1, wherein status signal data of the equipment is stored in the memory. 3. The equipment monitoring method according to claim 2, wherein the macro definition includes a macro instruction for data processing the status signal data of the equipment and a macro instruction for displaying the data processed status signal data. Characteristic equipment monitoring method. 4. The equipment monitoring method according to claim 1, wherein the macro definition includes a macro command for logging status signal data of the equipment. 5. A monitoring device for monitoring equipment operated by a sequence controller, comprising a data processing unit for performing data processing for monitor control separately from the sequence controller, and a memory accessible by the data processing unit. An equipment monitoring device, comprising: a memory for storing a macro definition for defining a procedure for processing status signal data of the equipment for monitoring the equipment.