JP2003114804A - Real time os control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control unit capable of giving an operator minimum information for grasping a state of an object to be controlled by starting a monitor operable on a real-time OS even when operation screen display does not work due to the occurrence of an abnormality in versatile OS processing. SOLUTION: Setting means whereby the operator can switch between an RT monitor screen and a versatile OS operation screen is provided in a control part. When the RT monitor screen is selected, communication control between the control part and an operation part is changed from versatile OS to real-time OS, and a CPU for communication control at the operation part side is also used to transfer control data for displaying on the RT monitor screen. Display data to be outputted to a screen display means is changed to the RT monitor side by the CPU at the operation part side, thereby making it possible to give an operator information necessary for grasping the state of the object to be controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device that executes two OSs, a general-purpose OS and a real-time OS.

[0002]

2. Description of the Related Art Among various tasks managed by an operating system (OS), some tasks require accurate processing in a short time. For example, an OS used in a machine control device of a numerical machine tool is required to have strict real-time properties for tasks related to machining operations of a machine to be controlled. The control device as described above includes an O of a personal computer normally used for business or home use.
As compared with S (general-purpose OS), an OS (real-time OS) with enhanced task time management is used.

However, among various tasks managed by the OS for operating the above control device, there are some tasks that do not require real-time processing. For example, in the case of a numerical machine tool, the status of the machining operation is determined. A task for inputting / outputting the machine control device such as a task for displaying an image or a task for communicating with the control device of the operation panel does not require so accurate time management.

When the tasks related to the input / output of such a machine control device are directly processed by the real-time OS, a program depending on the real-time OS is required to execute these tasks, but the hardware is replaced. However, there has been a problem that it is time-consuming to change the program to a program specific to the real-time OS each time it is added.

Therefore, conventionally, a method has been used in which a general-purpose OS is operated on a real-time OS, and the tasks related to input / output of these machine control devices are managed by the general-purpose OS. The general-purpose OS and the application programs that operate on the general-purpose OS are excellent in human interface functions such as graphics. Also, when changing or adding hardware, the driver for the general-purpose OS can be changed and added, so that work is also required. It's easy. In this way, it is possible to provide the operator with both a graphical operating environment that takes advantage of the general-purpose OS and a stable real-time control by the real-time OS.

FIG. 4 is a block diagram showing an example of a numerical controller used in a conventional machine tool. The numerical controller comprises a control unit 1 for controlling a controlled object 3 and an operation unit 2 for operating the control unit 1.

The control unit 1 includes a CPU 11, a storage unit 12,
The graphic data generating means 13, the control data input / output means 14, and the data input / output means 16 are connected to each other by a local bus 17.

The CPU 11 manages a task, such as a machining operation of a machine, which requires real-time processing on the real-time OS. On the real-time OS,
Further, a program for emulation is executed, and the general-purpose OS operates in the virtual architecture provided by the emulation program.
Under the general-purpose OS, the CPU 11 manages the image data of the operation screen by the graphic data generating means 13 and the communication processing by the data input / output means 16.

The storage means 12 stores a real-time OS, a general-purpose OS, programs such as various applications, and data such as control data 6 which is input and output by the control data 14.

The graphic data generation means 13 generates the graphic data 4 of the operation screen of the machine tool to be controlled 3 based on the data stored in the storage means 12 etc. under the task management by the general-purpose OS.

The control data input / output means 14 is a control command to the controlled object 3 under the task management by the real-time OS, a detection signal indicating the operating state of the controlled object 3 detected by a sensor (not shown), etc. The control data 6 of the above is exchanged with the controlled object 3 in real time.

The data input / output unit 16 takes in the communication data 5 input by the operator from the operation unit 2 through the communication line under the task management by the general-purpose OS.

The operation unit 2 comprises a display unit 21, a display adjustment unit 22, a CPU 23, a storage unit 24, a data input / output unit 25, and a key input unit 26. CPU2
3, the storage means 24, the data input / output means 25, and the key input means 26 are connected to each other by a local bus 28.

The display means 21 inputs the display data 27 from the display adjusting means 22 and displays the operation screen of the controlled object 3.

The display adjusting means 22 inputs the graphic data 4 generated by the graphic data generating means 13 of the control section 1, adjusts the timing to a timing suitable for the display means 21, and outputs the display data 27.

The CPU 23 sends the key data (see communication data 5 in the figure) input from the key input means 26 from the data input / output means 25 on the operation section 2 side to the data input / output means 16 on the control section 1 side. A communication control program for executing.

The storage means 24 stores various programs and various data executed by the CPU 23.

The data input / output unit 25 communicates with the data input / output unit 16 on the control unit 1 side via a communication line.

The key input means 26 is provided for the operator to input key data for operating the screen of the display means 21.

[0020]

Even in the conventional control device as shown in FIG. 4, a general-purpose OS has a stable operation.
May be inferior when compared to a real-time OS originally developed for real-time control. For this reason, an abnormality may occur in a task managed under the general-purpose OS for some reason, but even in such a case, real-time processing directly managed under the real-time OS may be normal. For example, in the example of FIG. 4, the control relating to the machining operation of the machine tool that is the control target is operating normally, but the screen display falls into a state where it does not function. In such a case, this occurs in the control device. There is a problem that the operator cannot judge the content of the abnormality and the operating state of the controlled object.

The present invention has been made in view of the above problems, and an object of the present invention is to allow an operator to grasp the state of a controlled object even when the above-mentioned abnormality occurs in the control device. It is to provide a control device.

[0022]

SUMMARY OF THE INVENTION The present invention is a control device comprising a control unit for controlling a control target and an operation unit having a display unit for displaying a display screen showing the state of the control target. The control unit includes a processor that operates a general-purpose OS on the real-time OS, a control-data input / output unit that inputs / outputs control data used to control a control target under task management of the real-time OS, and a general-purpose OS. A real-time OS control device having an operation screen generation means for generating an image of the operation screen displayed by the display means based on control data under task management, and controlling when an abnormality occurs in the operation screen. Monitor screen generation means for generating an image of a monitor screen on which monitoring data for monitoring an object is displayed, and the display screen of the display means is the operation screen and the monitor. Characterized in that it comprises a display screen switching means for switching between screens.

Preferably, the monitor screen generating means is
A transmission unit that is provided in the control unit and that transmits at least a part of the control data to the operation unit as the monitoring data under the task management of the real-time OS; and a transmission unit that is provided in the operation unit and receives the monitoring data. Monitor screen output means for outputting an image of the monitor screen based on the monitoring data.

Preferably, the display screen switching means is provided in the control section, and is provided in the control section and screen setting input means for the user to set the switching of the display screen under the task management of the real-time OS. Based on the information input by the screen setting input unit, a transmission unit that transmits a request signal for switching the display screen of the display unit to the operation unit side, an image of the operation screen provided in the operation unit, An image data selection unit that inputs the image of the monitor screen and outputs one of the image of the operation screen and the image of the monitor screen to a display unit based on the request signal. Is characterized by.

[0025]

FIG. 1 is a block diagram showing an example of a control device of the present invention. Description of parts similar to those of the conventional control device in FIG. 4 will be omitted.

The control unit 1 includes a display mode setting means 15 connected to the local bus 17.

The display means 21 displays one of the two display mode screens, the operation screen and the real-time monitor (hereinafter referred to as RT monitor screen) screen.
An image based on the graphic data 4 generated by the graphic data generating means 13 is displayed on the operation screen. When the operation screen is no longer displayed on the display means 21 on the RT monitor screen, the control data input / output means 1
Of the various control data 6 input / output by 4, the control data necessary for grasping the operating condition of the control target and the state of the control target such as alarm information are displayed.

The display mode setting means 15 is for the operator to switch the display screen of the display means 21 from the operation screen to the RT monitor screen when an abnormality occurs in a task managed by the general-purpose OS operating on the CPU 11. belongs to.

The operation section 2 includes a display adjusting means 22A connected to the local bus 28.

The display adjusting means 22A is controlled by the CPU 23 so as to be switchable between the first operation mode and the second operation mode. In the first operation mode, the graphic data 4 from the control section 1 is inputted and the display means 21A. The display data 27 of the operation screen is output after being adjusted to a timing suitable for. In the second operation mode, display data 27 of an RT monitor screen, which will be described later, is output to the display means 21.

As shown in FIG. 2, the display adjusting means 22A comprises a local bus interface 221, a selector 222 and a timing adjusting circuit 223.

The local bus interface 221 is
It is connected to the local bus 28, and under the control of the CPU 23, the RT monitor display data 224 which is the display data of the RT monitor screen, and the switching command data for switching the display screen of the display means 21 are sent to the selector 222. Output.

The selector 222 inputs the graphic data 4, the RT monitor display data 224, and the switching command data, and receives the graphic data 4 and the RT monitor display data 2
Either one of 24 is selected based on the switching command data and output to the timing adjustment circuit 223.

The timing adjusting circuit 223 is provided in the selector 2
The output timing of the display data 27 from the data from 22 is adjusted to a timing suitable for the display means 21.

Next, a method of switching the display screen of the display means 21 from the operation screen to the RT monitor screen will be described with reference to the flowchart of FIG.

When an abnormality occurs in the general-purpose OS (S1) and the operation screen is no longer displayed on the display means 21, the operator sets the display mode to the RT monitor by the switch provided in the display mode setting means 15. (S2). When the display monitor is set to the RT monitor, the display mode setting means 15 outputs a signal indicating that the display mode has been switched. When detecting the signal via the local bus 17, the CPU 11 switches the control of the communication processing by the data input / output unit 16 from the management by the general-purpose OS to the direct management by the real-time OS (S3).

Next, in order to inform the operation unit 2 that the display mode needs to be switched from the operation screen to the RT monitor screen, the data input / output means 16 operates under the task management of the real-time OS operating on the CPU 11. A display mode switching code is sent (S4). Here, the display mode switching code is the CPU 11 on the control unit 1 side and the CP on the operation unit 2 side.
It is one of the codes predetermined with U23 (hereinafter referred to as a predetermined code). Next, the data input / output means 1
Under the task management of the real-time OS, 6 sends out a predetermined transfer request code from the data input / output means 16 in preparation for transferring the control data 6 to be displayed on the RT monitor screen (S5), and then from the operation unit 2. Wait for the response (S6, S
9).

Upon receipt of the display mode switching code, the CPU 23 of the operation unit 2 controls the display adjusting means 22A to switch the display data 27 to the RT monitor screen (S10).
And waits for the predetermined transfer request code from the control unit 1 (S11, S16).

After the CPU 23 receives the transfer request code from the data input / output unit 25 via the local bus 28 and the preparation for transfer acceptance is completed, the input / output unit 25
Under the control of the CPU 23, a predetermined transfer permission code is sent to the control unit 1 side (S12).

The transfer permission code is assigned to the data input / output means 2
When the CPU 11 receives the data from the CPU 5 through the local bus 17, the control data input / output unit 14 takes in the control data to be displayed on the RT monitor screen from the control target 3 under the task management of the real-time OS, and the data input / output unit 16
Transfers the control data to the operation unit 2 side (S7). When the transfer of the control data is completed, the data input / output unit 16 transfers a transfer completion command indicating that the transfer is completed to the operation unit 2 side (S8). The data input / output unit 25 continues to receive the control data until the CPU 23 receives the transfer completion command from the control unit 1 side (S13,
S14). When the transfer of the control data between the control unit 1 and the operation unit 2 is completed, the display adjusting means 22A updates the value of the control data displayed as the RT monitor screen under the control of the CPU 23 (S15).

In this way, even when the processing of the general-purpose OS becomes abnormal and the operation screen does not function, the RT monitor screen can be activated and the information of the controlled object 3 can be displayed.

[0042]

As described above, according to the control device of the present invention, even if an abnormality occurs in the processing of the general-purpose OS and the controlled object continues to operate without the screen display functioning, the operation screen By switching the display mode to the RT monitor screen, it becomes possible to display the minimum amount of information on the display means to inform the operator in order to grasp the state of the controlled object.

Further, by utilizing the input / output means such as key data and its communication line for the transfer of the control data displayed on the RT monitor screen, it is possible to provide a dedicated line for the RT monitor between the control section and the operation section without using a dedicated line for the RT monitor. Can achieve the purpose.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device according to an embodiment of the present invention.

FIG. 2 is a diagram of a display adjusting means of the control device according to the exemplary embodiment of the present invention.

FIG. 3 is a flowchart showing an example of a display switching process performed by the control device according to the embodiment of the present invention.

FIG. 4 is a block diagram showing a conventional control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 control part, 11 CPU, 12 storage means, 13 graphic data generation means, 14 control data input / output means, 15 display mode setting means, 16 data input / output means, 17 local bus, 2 operation parts, 21 display means, 22, 22A display adjusting means, 221 local bus interface, 222 selector, 223 timing adjusting circuit, 224 RT monitor display data, 23
CPU, 24 storage means, 25 data input / output means, 2
6 key input means, 27 display data after timing adjustment, 28 local bus, 3 controlled objects, 4 graphic data, 5 communication data, 6 control data.

Claims (3)

[Claims] 1. A control device comprising: a control unit for controlling a control target; and an operation unit having a display unit for displaying a display screen showing the state of the control target, wherein the control unit is real-time. A processor for operating a general-purpose OS on the OS, a control-data input / output unit for inputting / outputting control data used for controlling a control target under task management of the real-time OS, and a control data under control of general-purpose OS A real-time OS control device comprising: an operation screen generation means for generating an image of the operation screen displayed by the display means based on the monitoring data, and monitoring data for monitoring a control target when an abnormality occurs in the operation screen. And a monitor screen generation means for generating an image of a monitor screen on which is displayed, and a display screen of the display means is switched between the operation screen and the monitor screen. Real-time OS control apparatus characterized by comprising a display screen switching unit. 2. The real-time OS control device according to claim 1, wherein the monitor screen generation unit is provided in a control unit, and monitors at least a part of the control data under task management of the real-time OS. Transmission means for transmitting data to the operation section, and monitor screen output means provided in the operation section for receiving the monitor data and outputting an image of the monitor screen based on the monitor data. Real-time OS controller. 3. The real-time OS control device according to claim 1, wherein the display screen switching unit is provided in a control unit, and a user performs a display screen switching setting. The screen setting input means and the control section are provided with a request signal for switching the display screen of the display section based on the information input by the screen setting input section under the task management of the real-time OS. A transmitting means for transmitting to the side, an operation screen image provided on the operation unit, and the monitor screen image are input, and the operation screen image and the monitor screen image are displayed based on the request signal. A real-time OS control apparatus comprising: an image data selection unit that outputs one of the images to a display unit.