JP5466902B2 - Programmable display - Google Patents

Description

  The present invention relates to a programmable display, and more particularly to a programmable display including a low-resolution display device.

  The programmable display is used as an HMI (Human Machine Interface) of the control system, and has a communication interface with a controller such as a programmable logic controller (PLC), a temperature controller, and an inverter. Communication is performed to display the state of the device connected to the controller, and the state of the device is controlled in accordance with an operation input received from the screen.

  When there is a system window display request, the programmable display device displays the system window. Here, the system window means a window screen that is fixedly provided by a program originally stored in the programmable display main body other than a screen that can be freely created by the user using the drawing software. doing.

JP 2007-94294 A (summary)

  In the conventional programmable display, the resolution (number of display dots) of the display device provided is sufficient to display all the system windows, so there is not enough drawing area to display all the system windows. I never did. Therefore, the conventional programmable display device simultaneously displays all the system windows that have been requested to be displayed simultaneously on the screen of the display device provided.

  However, from the viewpoint of cost reduction and downsizing, if the display device of the programmable display has a resolution that is not sufficient to display all the system windows, that is, a low-resolution one, all the system windows are displayed. However, the drawing area is insufficient. Therefore, in a programmable display equipped with a low-resolution display device, if there are many system windows for which a display request has been made, the drawing area will be insufficient, and a display request will be displayed on the screen of the equipped display device. You may not be able to display all of your system windows at the same time.

  Patent Document 1 proposes a programmable display that displays a plurality of windows on a base screen in a state with little overlap. The technique proposed in Patent Document 1 is suitable for a programmable display device having a high-resolution display device, but is proposed in Patent Document 1 for a programmable display device having a low-resolution display device. Even if the technology is applied, the problem that it may not be possible to simultaneously display all the system windows requested to be displayed on the screen of the display device provided cannot be solved.

  In view of the above situation, an object of the present invention is to provide a programmable display capable of displaying a large amount of information efficiently even with a small amount of information display.

  In order to achieve the above object, a programmable display device according to the present invention includes a display unit having a resolution that is not sufficient to display all system windows, a storage unit that stores display priorities of the system windows, and When not all of the system windows to be displayed can be displayed on the display screen at the same time, according to the display priority, the system windows to be displayed are determined not to be displayed. And a non-display determining means. The “thing to be displayed” corresponds to, for example, a system window in a state from when a display request event occurs until a display erasure request event occurs. Also, for example, when there is a non-display setting that is never displayed even if there is a display request for each system window, those for which the non-display setting is ON are excluded from the above-mentioned “to be displayed”. .

  In addition, it is desirable that display of the previously displayed system window is given priority between system windows having the same display priority.

  In addition, temporary storage means for temporarily storing that the system window that is not displayed by the determination by the non-display determination means is in a display standby state can be displayed, and the system window that is not displayed by the determination by the non-display determination means can be displayed. When the state is reached, it is desirable to cancel the display standby state and display a system window that is not displayed by the determination of the non-display determination means.

  According to the programmable display device of the present invention, a system window having a high display priority is automatically set even when a drawing area of a system window to be displayed is insufficient because the display device provided has a low resolution. Since it is determined and simultaneously displayed as much as possible, a large amount of information can be displayed efficiently even with a small amount of information display.

It is a figure which shows one structural example of the control system using the programmable display which concerns on one Embodiment of this invention. It is a table | surface which shows notionally the content contained in the control data referred when the window for systems is displayed. It is a figure which shows typically the example of the simultaneous display of a system menu window and a flow alarm window. It is a figure which shows typically the example of the simultaneous display of a system menu window and a 1 line error display window. It is a figure which shows typically the example of the simultaneous display of a flow alarm window and a 1 line error display window. It is a figure which shows typically the other example of the simultaneous display of a system menu window and a flow alarm window. It is a figure which shows typically the other example of the simultaneous display of a system menu window and a 1 line error display window. It is a figure which shows typically the other example of the simultaneous display of a flow alarm window and a 1 line error display window. It is a flowchart which shows the operation | movement relevant to the display of the window for systems of the programmable display which concerns on one Embodiment of this invention. It is a figure which shows the 1st step of the transition example of a display screen. It is a figure which shows the 2nd step of the example of a transition of a display screen. It is a figure which shows the 3rd step of the example of a transition of a display screen.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a control system using a programmable display 1 (hereinafter, abbreviated as “programmable display 1”) according to an embodiment of the present invention. The control system shown in FIG. 1 includes a programmable display 1, a control host computer 2, a communication network 3, a PLC 4, and a device 5.

  The programmable display 1 is connected to a control host computer 2 via a communication network 3.

  The PLC 4 executes the control program (ladder program) created by the user to capture the state of the input device 5 at every predetermined scan time such as several tens of ms, and to output the device. 5 gives a control instruction.

  Examples of the input device 5 include a switch and a sensor, and examples of the output device 5 include a lamp and a bulb. These various devices 5 are arranged in required parts of various target systems such as a production line.

  Next, the configuration of the programmable display device 1 will be described. The programmable display 1 includes a CPU (Central Processing Unit) 11, interface units 12 and 13, SRAM (Static RAM) 14, FEPROM (Flash Erasable and Programmable ROM) 15, DRAM (Dynamic RAM) 16, and display. A device 17 and a touch panel 18 are provided.

  As will be apparent from the following description, the display device 17 corresponds to an example of “display means” in the claims, the FEPROM 15 functions as an example of “storage means” in the claims, and the CPU 11 includes “ The DRAM 16 functions as an example of “temporary storage unit” in the claims.

  The display device 17 is preferably a thin display device such as a liquid crystal display device, an EL display device, or a plasma display device. The display device 17 is a display device having a resolution that is not sufficient to display all the system windows, that is, a low-resolution display device.

  In this embodiment, there are four system windows: a system menu window, a brightness / contrast adjustment window, a flow alarm window, and a one-line error display window. The system menu window is a window screen for performing maintenance of the programmable display 1 and is, for example, for shifting to an offline state (a state in which the programmable display 1 is not logically connected to the control host computer 2). A switch, a switch for resetting the programmable display 1, a switch for displaying an error detail window when there is an error occurring, a switch for displaying the state of the device 5, and the programmable display 1 A window screen on which a menu for displaying a switch or the like for reading data stored in a USB memory connected to a USB terminal (not shown) and executing restart of the programmable display 1 based on the read data It is. The brightness / contrast adjustment window is a window screen on which a setting screen for adjusting the brightness and contrast of the display screen is displayed. The flow alarm window is a window screen displayed so that an alarm message flows from the right side to the left side of the screen. The one-line error display window is a window screen on which an error code and a head portion of error contents are displayed. In this embodiment, the resolution of the display device 17 is 200 dots wide and 80 dots long, and there is a drawing area that displays two of the system menu window, flow alarm window, and one-line error display window at the same time. There is no drawing area that displays all three at the same time. In the present embodiment, since the brightness / contrast adjustment window is a full-screen display, it cannot be displayed simultaneously with other system windows.

  The interface unit 12 is a communication control unit for the programmable display 1 to communicate with the control host computer 2, and is connected to the communication network 3. The interface unit 12 is configured to perform network communication based on the IP address of the control host computer 2.

  The interface unit 13 is a communication control unit for the programmable display device 1 to communicate with the PLC 4. The interface unit 13 performs serial communication using a communication protocol according to the manufacturer and model of the PLC 4 when the PLC 4 is a model that performs serial communication, and performs network communication when the PLC 4 is a model that performs network communication. Configured to do.

  The SRAM 14 is a data memory that stores data obtained from the PLC 4 and data generated by the programmable display 1.

  Sampling data is an example of data obtained from the PLC 4. The sampling data is data obtained by the PLC 4 from the device 5 and is stored in the SRAM 14 in the order of generation.

  Examples of data generated by the programmable display 1 include alarm data, line graph data, and operation log data.

  The alarm data is information regarding the alarm. When the CPU 11 receives that a predetermined alarm bit in the PLC 4 is turned on, the CPU 11 creates contents (messages) about the alarm set in advance for the alarm bit, together with the issue time (reception time), Use alarm data. The line graph data is data for displaying a line graph. The CPU 11 creates line graph data based on the sampling data. The operation log data is data related to the user's operation history with respect to the programmable display 1, and details of operations performed by the user on the programmable display 1 (login, logout, touch operations on the screen, etc.) and operator information ( Name, affiliation, etc.) and time of occurrence.

  The FEPROM 15 stores screen data, display / control programs, communication protocol data, communication programs, protocol conversion programs, ladder programs, ladder processing programs, and the like. These various data and programs may be stored in the FEPROM 15 in advance, or may be read from a storage medium such as a CD-ROM by the storage medium playback unit so that the program display 1 is provided with a storage medium playback unit. It may be stored in the FEPROM 15 in advance. These various data and programs may be transferred from the control host computer 2 to the programmable display 1 via the communication network 3 or other communication transmission path, and stored in the FEPROM 15, for example. The display / control program includes control data referred to when the system window is displayed and screen data referred to when the system window is displayed.

  In the present embodiment, the control data referred to when displaying the system window included in the display / control program includes the contents shown in the table shown in FIG. In addition, the display priority in the table | surface shown in FIG. 2 shall have a high priority, so that a number is small. In the present embodiment, as described above, the display device 17 has a drawing area that displays two of the system menu window, flow alarm window, and one-line error display window at the same time, but a drawing area that displays all three at the same time. In addition, since the brightness / contrast adjustment window is a full-screen display, it cannot be displayed simultaneously with other system windows. Therefore, in the present embodiment, the system window can be displayed at the same time by combining a system menu window and a flow alarm window, a combination of a system menu window and a one-line error display window, a flow alarm window and one line. There are three patterns, a combination with an error display window.

  The simultaneous display of the system menu window and the flow alarm window is as shown in FIG. 3A when the display position setting of the system window described later is the lower display, and the display position setting of the system window described later is displayed on the upper display. In this case, it becomes as shown in FIG. 4A. The simultaneous display of the system menu window and the one-line error display window is as shown in FIG. 3B when the display position setting of the system window described later is the lower display, and the display position setting of the system window described later is set. In the case of the upper display, it is as shown in FIG. 4B. The simultaneous display of the flow alarm window and the one-line error display window is as shown in FIG. 3C when the display position setting of the system window described later is the lower display, and the display position setting of the system window described later is set. In the case of the upper display, it is as shown in FIG. 4C.

  Also, the FEPROM 15 is absolutely free from alarm messages in the flow alarm window, which is one of the system windows, the display position setting of the system window (upper display or lower display), and a display request for each of the system windows. Stores ON / OFF of non-display setting not to be displayed. These alarm messages and various settings are created by the user using, for example, drawing software installed in the control host computer 2, and thereafter, the control host computer 2 sends the programmable display 1 via the communication network 3. It may be transferred and stored in the FEPROM 15.

  In the display of the flow alarm window, the alarm message stored in the FEPROM 15 is displayed so as to flow from the right side to the left side of the screen. The display or non-display of the system window is executed based on the display position setting and non-display setting described above.

  The screen data is data of a screen (user screen) displayed on the display device 17, data of a base screen, data of imaged parts such as switches and lamps, and processing instruction words given to each part. (Tag).

  The above tag is created for each event to be executed on the base screen. Basically, the file number of the base screen on which the display control operation is to be executed and the operation to be executed on this base screen. An event name for specifying the contents and reference information including one or more data referred to for each execution event are provided as a set. For example, when the tag is a display tag that displays a part graphic corresponding to the content of a predetermined device address in a predetermined screen area (display coordinate range), the reference information includes a coordinate range (X, Y) for display. And a file number for specifying a display target and a predetermined device address indicating a predetermined state of the display target. When the tag is an input tag, the reference information includes an effective input coordinate range (X, Y) and a device address where the input result is written.

  The DRAM 16 is a work memory used for temporary storage of data exchanged with the PLC 4 in addition to being used for work during arithmetic processing such as display control.

  The touch panel 18 is an input device arranged on the display screen of the display device 17 in order to perform touch input on the display screen of the display device 17.

  Next, operations related to the display of the system window of the programmable display 1 will be described with reference to the flowchart shown in FIG.

  When the programmable display 1 is turned on, the flowchart shown in FIG. 5 is started. First, the CPU 11 determines whether or not a display request event for requesting display of a system window has occurred (step S10).

  If no system window display request event has occurred (NO in step S10), the process returns to step S10. On the other hand, if a system window display request event has occurred (YES in step S10), the CPU 11 determines the system window that is currently being displayed (step S20).

  After that, the CPU 11 reads out the control data referred to when displaying the system window including the contents shown in the table of FIG. 2 from the FEPROM 15, and displays the display priority and the display request event of the currently displayed system window. Reference is made to the display priority of the system window in which the error occurred (step S30). Then, the CPU 11 determines whether or not the system window in which the display request event has occurred satisfies the display conditions (step S40).

  If the non-display setting is ON for the system window in which the display request event has occurred, the display condition is not satisfied. On the other hand, if the non-display setting is OFF for the system window in which the display request event has occurred, the following occurs. When it is not possible to simultaneously display all the system windows that are currently displayed and the system window in which the display request event has occurred (when the display availability in the table shown in FIG. 2 is “No”), the display priority (FIG. 2) is displayed with priority, and if it has the same priority, the previously displayed system window is given priority. Therefore, (1) when the current alarm window is included in the currently displayed system window, (2) when the only system window currently displayed is the system menu window, and (3) currently displayed. If the system window in the middle is only a one-line error display window, the display condition is satisfied.

  If the system window in which the display request event has occurred satisfies the display conditions (YES in step S40), the system window in which the display request event has occurred is displayed, and the system window in which the display request event has occurred is displayed. If the system window for low display priority (flow alarm window) cannot be displayed simultaneously, the display of the system window for low display priority (flow alarm window) is deleted (step S50), and the flow alarm is displayed. The fact that the window is in the display standby state is temporarily stored in the DRAM 16, and then the process returns to step S10. On the other hand, if the system window in which the display request event has occurred does not satisfy the display condition (NO in step S40), the system window in which the display request event has occurred is not displayed (step S60), and the display request event occurs. The DRAM 16 temporarily stores the fact that the system window is in the display standby state, and then returns to step S10.

  As long as power is supplied to the programmable display device 1, the above-described series of operations (operations related to the display of the system window) are repeated. By repeating the above-described series of operations (operations related to the display of the system window), the programmable display device 1 has insufficient drawing area of the system window to be displayed because the display device provided has a low resolution. Even in such a case, a system window having a high display priority is automatically determined and simultaneously displayed as much as possible, so that a large amount of information can be displayed efficiently even with a small information display amount.

  Further, the CPU 11 constantly monitors whether or not a display erasure request event for requesting display erasure of the system window has occurred. When the display erasure request event occurs, an interrupt process is performed for the flowchart operation shown in FIG. To clear the display of the system window in which a display clear request event has occurred, and if there is a system window in display standby state, generate a display request event for the system window in display standby state Then, the operation returns to the flowchart operation shown in FIG. When a display erasure request event occurs for the system window in the display standby state, the display standby state is canceled. Thus, if a system window that has been erased or not displayed because it cannot be displayed simultaneously can be displayed without being requested to be erased, the system window that has been erased or not displayed is displayed. be able to.

  Here, transition examples of the display screen of the display device 17 will be described with reference to FIGS. 6A to 6C. First, as shown in FIG. 6A, it is assumed that a flow alarm window W1 and a one-line error display window W2 are simultaneously displayed on the base screen. In this example, the alarm message in the flow alarm window W1 is “Emergency Earthquake Early Warning”. When a display request event for requesting display of the system menu window occurs in the display state shown in FIG. 6A, the display of the flow alarm window W1 is deleted by the processing of step S50 in the flowchart shown in FIG. A window W3 is displayed, and as shown in FIG. 6B, a one-line error display window W2 and a system menu window W3 are simultaneously displayed on the base screen. In the display state shown in FIG. 6B, when the “x” display in the one-line error display window W2 is touched, a display erasure request event for requesting the display erasure of the one-line error display window occurs, and the one-line error display window W2 If the flow alarm window W1 remains in the display standby state at this time, the flow alarm window W1 is displayed again, as shown in FIG. 6C. Since the alarm message flow process of the flow alarm window W1 is repeatedly executed even in the display standby state, if the alarm message flow process is in progress at the time when the flow alarm window W1 is displayed again, FIG. 6C shows. Thus, the display is resumed from the middle of the alarm message.

  As mentioned above, although embodiment which concerns on this invention was described, the range of this invention is not limited to this, A various change can be added and implemented in the range which does not deviate from the main point of invention. For example, in the above-described embodiment, the number of system windows is four, and the maximum number of system windows that can be simultaneously displayed on the display device is two. However, this is merely an example, and the display device includes It is sufficient that the maximum number of system windows that can be displayed simultaneously is smaller than the number of system windows.

DESCRIPTION OF SYMBOLS 1 Programmable display device which concerns on one Embodiment of this invention 2 Host computer for control 3 Communication network 4 PLC
5 devices 11 CPU
12, 13 Interface unit 14 SRAM
15 FEPROM
16 DRAM
17 Display device 18 Touch panel W1 Flow alarm window W2 Single line error display window W3 System menu window

Claims (2)

First storage means for storing a program;
Display means having a drawing area smaller than an area necessary for simultaneously displaying all system windows, which are window screens fixedly provided by the program ;
Storage means for storing the display priority of each of the system windows;
When all of the system windows to be displayed cannot be displayed on the screen of the display screen at the same time, according to the display priority, the system windows not to be displayed among all the windows to be displayed A non-display determining means for determining;
Temporary storage means for temporarily storing that a system window that is not displayed by the determination of the non-display determination means is in a display standby state.
The first system window is displayed as a second system window having a display priority higher than that of the first system window, so that the first system window is not displayed due to the determination by the non-display determining means. After that, even if the display of the second system window is not terminated,
When the system window that is not displayed by the determination of the non-display determining means can be displayed, the display standby state is canceled, and the system window that is not displayed by the determination of the non-display determining means is displayed. Programmable display.   2. The programmable display according to claim 1, wherein the display of the previously displayed system window is prioritized between system windows having the same display priority.