JP2012128719A - Programmable display and data display program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a programmable display capable of switching and displaying pieces of data of multiple devices on a single image.SOLUTION: An ID change determination part 213 determines if there is a change or not in a value of a device ID (an ID for specifying each connection device 3) in a device designation address set in a working memory 27, by a query of a display switching part 211a, when a first display scan ends. At the change determination of the device ID, the ID change determination part 213 gives change notification to the display switching part 211a and gives a data acquisition address of the connection device 3 corresponding to the device ID to a communication switching part 211b. At the next scan, a display communication processing part 211 communicates with the connection device 3 specified by the value of the device ID according to the request of the communication switching part 211b and acquires desired data from the data acquisition address in a memory 31 of the connection device 3. The display communication processing part 211 switches data to the acquired data and displays it on an image according to the request of the display switching part 211a.

Description

  The present invention relates to a programmable display and a data display program configured to switch and display data of a plurality of devices connected to a programmable display in a single image.

  The programmable display device includes a screen for displaying an image, a touch panel for touch input, an interface for communication with a connected device, and a control unit for controlling the above-described units. Such a programmable display is an operation-type display that has a function of displaying an operation status of an apparatus on an image displayed on a screen and receiving an operation input for giving a control instruction to the apparatus from a touch panel on the screen. It is a vessel.

  In general, since the programmable display device has a graphic display function, an operation panel, a switch, an indicator lamp, and the like can be displayed on an image prepared in advance, and serves as an operation terminal in the control system. In the control system, the display of the operating status of each device and the control instruction to the device are performed by a programmable display arranged near the device.

  In order to monitor the operating state of devices such as a temperature controller and an inverter using the programmable display as described above, various display forms can be used. Examples of such display forms include the following first display form and second display form.

  The first display form is a display form in which a plurality of devices are directly connected to one programmable display and the operating status of each device is displayed on the programmable display (for example, Patent Document 1). In the second display mode, when the device is indirectly connected to the programmable display device via the programmable logic controller (PLC), the device data acquired via the PLC I / O is monitored by the programmable display device. It is a display form (for example, patent document 2). Specifically, in the second display mode, the device data stored in the device memory of the PLC is read out and displayed on the programmable display.

JP 2007-11936 A (published on January 18, 2007) JP 2006-134098 A (released May 25, 2006)

  In the first display form, since the number of devices that can display data with a single image is limited (for example, four devices), a plurality of images are required when displaying data of a large number of devices. For example, when displaying data of 16 devices, if it is possible to display data of up to 4 devices with a single image, 4 images are required. For this reason, it is necessary to create a plurality of similar images, and the man-hours for that are increased. In addition, a large amount of memory capacity for storing images in the programmable display is consumed, and the storage capacity of other images is reduced.

  On the other hand, in the second display mode, an image for selecting a monitoring method, an individual image corresponding to the monitoring method, and the like are required as images for monitoring, and in some cases, 10 images may be required. For example, if 16 devices are connected to one PLC, assuming that 10 images are necessary for monitoring for one device, 160 images are required. For this reason, as in the first display mode, the man-hours for creating a plurality of similar images are increased, and the capacity of the image storage memory is increased.

  The present invention has been made in view of the above problems, and an object thereof is to provide a programmable display capable of switching and displaying data of a plurality of devices on a single image.

  In order to solve the above-described problem, a programmable display device according to the present invention obtains data stored in a memory of the device by communicating with a plurality of connected devices and displays the data on an image. In addition, an internal memory that stores an ID for identifying each device at a predetermined address, an ID changing unit that changes the ID in response to an instruction, and whether or not there is a change in the value of the ID at the address When it is determined that the ID change determination unit, the ID value has changed, the communication switching unit that switches the communication partner to the device corresponding to the ID, and the switched communication partner on the single image It is characterized by comprising display switching means for switching the display to the data acquired from the device.

  In the above configuration, when an instruction is given by a touch operation on an image by the user, the ID for specifying each device in the address is changed by the ID changing unit. For the ID, it is determined by the ID change determination means whether the value has changed. If it is determined that the value of the ID has changed, the communication partner is switched to a device corresponding to the changed ID by the communication switching means. Thereby, a programmable display communicates with the said apparatus and acquires desired data from the memory. The display switching means switches the display to data acquired from the switched communication partner device on a single image.

  The reason why the data of each device can be switched and displayed on the same image is because the device to be a communication partner is specified based on the ID value in the address. Therefore, it is only necessary to prepare one common image for displaying the data of the device 3.

  The programmable display device preferably includes operation log data creation means for creating operation log data for recording a touch operation for giving the instruction on the image including the ID.

  In this configuration, when the above touch operation is performed, operation log data including the ID is created by the operation log data creating means. In addition, when an instruction is given by the touch operation, the ID at the address is changed as described above, and the display is switched to the data acquired from the device corresponding to the ID. Therefore, it can be seen from the operation log data that the data of the device specified by the ID is displayed.

  The data display program of the present invention is a program for causing a computer to function as each means of the programmable display. Thus, a programmable display is realizable by making a computer read and run a data display program.

  Since the programmable display according to the present invention is configured as described above, the number of steps for creating an image can be greatly reduced, and the memory capacity for storing the image can be reduced. There is an effect.

It is a block diagram which shows the structure of the control system which concerns on Embodiment 1 of this invention. It is a flowchart which shows the procedure of the process which switches a connection apparatus or PLC in a programmable display in the control system which concerns on Embodiment 1 and 2, and displays data. (A) thru | or (c) show the state which switches the temperature controller as a connection apparatus and displays the temperature data of the said temperature controller on a single temperature monitor image in the programmable display in the control system of FIG. FIG. It is a block diagram which shows the structure of the control system which concerns on Embodiment 2 of this invention. It is a figure which shows the device monitor image displayed by the programmable display in the control system of FIG.

[Embodiment 1]
One embodiment of the present invention is described below with reference to FIGS.

[1. (Control system configuration)
As shown in FIG. 1, the control system 1 according to this embodiment includes a programmable display 2 and a plurality of connection devices 3.

[1-1. (Configuration of connected devices)
The connection device 3 (device) is an external device connected to the programmable display 2 and communicates with the programmable display 2 by serial communication. The plurality of connected devices 3 are all the same model. For example, a master device is connected to one COM port of the programmable display device 2, and a slave device is daisy chain connected to the master device. As the connection device 3, devices such as a temperature controller and an inverter that generate measurement data with respect to setting data are mainly used.

  The connected device 3 has a memory 31. In this memory 31, data set by the programmable display 2 or data set by the connected device 3 is stored, and data measured by the sensor is stored. Yes. Since the memory 31 has a fixed address space for storing data, the same type of data can be acquired by accessing the same address with different connected devices 3 as long as they are of the same model. . For example, in the case of a temperature controller, addresses stored in the memory 31 are determined for the current temperature, measured temperature, set value, proportional value, differential value, integral value, and the like.

[1-2. Programmable display configuration
[1-2-1. (Basic function of programmable display)
The programmable display device 2 includes a CPU (Central Processing Unit) that executes instructions of an HMI control program that realizes each function. The programmable display 2 is a storage device (recording device) such as a ROM (Read 0nly Memory) that stores an HMI control program, a RAM (Random Access Memory) that develops the HMI control program, and a memory that stores the HMI control program and various data. Medium).

  The programmable display 2 is a dedicated computer that realizes an operation function and a display function unique to the programmable display by displaying image data used for input operation and display, and is preferably used as an HMI device. The image data is created by combining process definition information that defines various processes related to input operations and display operations. The programmable display device 2 can specify the operation of displaying the data of the connected device 3 and the operation of controlling the connected device 3 in accordance with the input operation based on the processing definition information included in such image data. .

[1-2-2. Configuration of each part of the programmable display]
In order to realize the above functions, the programmable display 2 includes an HMI processing unit 21, a screen 22, a touch panel 23, an interface unit (I / F in the figure) 24, a data memory 25, and a user memory 26. And a work memory 27. Hereinafter, each main part of the programmable display device 2 will be described in detail.

[1-2-2 (1). (Display / input configuration)
As the screen 22 constituting the display unit, a flat panel display panel such as a liquid crystal panel, an EL panel, or a plasma display panel is preferably used in order to form the programmable display 2 thinly. The touch panel 23 constituting the input unit is an input device provided for performing touch input on the display surface of the screen 22.

[1-2-2 (2). Configuration of interface section]
The interface unit 24 is a serial communication interface for the programmable display 2 to communicate with a serial communication device (here, the connection device 3). The interface unit 24 includes a COM port for performing serial communication, and the COM port and the master connection device 3 are connected via the communication cable 4. The interface unit 24 corresponds to a communication driver for controlling serial communication with the connection device 3. If the same communication driver is supported, the maximum number of connectable devices 3 (depending on the communication driver) can be connected to one COM port. Further, the interface unit 24 has a multi-protocol function, and enables various connection devices 3 to be directly connected to the programmable display 2 without using a protocol converter or a communication card for link communication. ing.

[1-2-2 (3). (Configuration of various memories)
(A) Data Memory The data memory 25 is configured by SRAM or DRAM, and stores data (device data) obtained from the connected device 3 and data (operation log data) generated by the programmable display 2. Since the data memory 25 stores different types of data as described above, the data memory 25 is not necessarily constituted by a single memory. For example, the data memory 25 is preferably composed of different types of memory depending on the type of data, or even if the memory is the same, the storage area is preferably made different depending on the type of data.

<Operation log data>
The operation log data is data relating to a user operation record (operation history) for the programmable display 2. The operation log data includes operation contents (login, logout, touch operations on images, etc.) performed by the user on the programmable display 2, operator information (ID, name, affiliation, etc.), generation time, and the like.

(B) User Memory The user memory 26 is a memory for storing image data, device setting data, and the like, and FEPROM (Flash Erasable and Programmable ROM) is used. Since FEPROM is a rewritable read-only flash memory, it plays the role of a hard disk drive in a general personal computer. A flash memory does not have a movable part and is resistant to impacts, and thus operates stably even in a poor ambient environment.

<image data>
The image data is an image file in which data of one or more user images (unit images composed of image data for one frame) displayed on the programmable display device 2 are collected. As image data, a series of related image data corresponding to a target system, a product manufactured by the target system, and the like are usually prepared as a set of project files. The project file includes device setting data related to image data and is created by image creation software. This project file is transferred to the programmable display 2 from a personal computer in which image creation software is installed.

  Further, the image data is configured by arrangement of component images on the base image, drawing of graphics, description of text, and the like. As part images, switches (on / off switches, changeover switches, push button switches, etc.), lamps, numeric keys, various display parts (data display parts, meter display parts, graph display parts, alarm display parts, etc.) are created. Provided with the software. Each component image is given a component ID for identifying the component image. In the component image, the processing content for realizing the function is set as the above-described processing definition information.

  For example, in the switch component image, when a touch operation is performed, processing specification information that defines the processing content of rewriting a value designated by a desired address between “0” and “1” is generated. It is preset by software. In addition, processing definition information that defines processing details for displaying data specified by a desired address is set in advance by the image creation software in the image of the data display component.

  Image creation requires a certain level of proficiency, and it is also necessary to make various settings related to the connected device, address settings for accessing the memory of the connected device, etc. for the component image. For this reason, for a specific device, a service is provided to provide a dedicated component image prepared in advance or a completed image completed including such a component image. As a result, the user is provided with a component image and a completed image corresponding to the device to be used, so that it is possible to save time and effort for developing the image. In addition, since the device setting and the address setting have already been performed for the component image, the user can use the provided component image as it is without troublesome settings. For example, when a temperature controller is used as the connection device 3, an image including a component image for data display for displaying temperature is provided.

<Device setting data>
The device setting data is various types of data that are set so that the programmable display device 2 communicates with the connection device 3 to exchange data. As the device setting data, a device name, a device ID, a data acquisition address, a device designation address, and an initial ID are prepared.

  The device name is a name of a device (node device) that is directly connected to the programmable display 2 and is registered in advance as a connectable device. Node devices can be added by performing a predetermined operation. For the connected device 3, for example, a controller such as a temperature controller, device names such as [CTL1], [CTL2],... Are assigned.

  The device ID is assigned to identify each node device. For example, device IDs are sequentially assigned to n devices such as 1, 2, 3,..., N.

  The data acquisition address is an address at which data acquired in a memory provided in each node device is stored.

  The device designation address (address) is provided for specifying a memory area for inputting the device ID. As this memory area, a freely usable area other than the area used for the operation of the programmable display 2 and system management is allocated.

  The initial ID is a device ID that identifies a device that performs communication when the programmable display device 2 is activated.

(C) Work memory The work memory 27 is constituted by, for example, a DRAM, and is used for work at the time of arithmetic processing such as display control, and also for temporary storage of data exchanged with the connection device 3. Used. The work memory 27 includes an area that can be freely used by the user, and this area may be allocated as the memory area for inputting the device ID. In the following description, it is assumed that a device designation address is set in the work memory 27. As the device designation address, for example, a fixed address such as [#INTERNAL] LS100 is used. Here, [#INTERNAL] represents an area of the internal memory of the programmable display 2.

[1-2-2 (4). Configuration of HMI processing unit]
The HMI processing unit 21 includes a display communication processing unit 211, an ID change unit 212, an ID change determination unit 213, and an operation log data creation unit 214.

(A) Configuration of Display Communication Processing Unit The display communication processing unit 211 communicates with the connection device 3 via the communication cable 4 every predetermined time interval or every predetermined event, and stores it in the memory 31 of each connection device 3. Get stored data. The display communication processing unit 211 writes the data thus acquired in a specific area in the data memory 25.

  Further, the display communication processing unit 211 acquires the data written in the data memory 25 and displays it in a predetermined area (for example, a data display component image) in the image displayed on the screen 22. The display communication processing unit 211 communicates with the connected device 3 to acquire data, and executes a series of processes for reflecting the state of the data on the above-described region in the image as a display scan.

  Further, the display communication processing unit 211 transmits a control instruction or the like to the connection device 3 in accordance with an input operation performed on the touch panel 23 on the image displayed on the screen 22. The control instruction includes an operation command and data setting.

  The display communication processing unit 211 operates when acquiring data from the connected device 3 and reflecting it in the display state of the component image in the image, or when giving a control instruction to the connected device 3 according to an operation on the component image. Is specified by the process definition information defined in the component image.

  The acquisition of data of the connected device 3 and the change of the control instruction may be performed each time or may be performed separately. In the case of performing separately, a temporary memory space is prepared in the programmable display 2, and at the time of acquisition / change, the memory space is accessed and communicated with the connection device 3 at every predetermined time interval or every predetermined event. And synchronize with the entity to which each address is assigned.

  The display communication processing unit 211 has a function of switching communication connection from the currently connected device 3 to a different device 3 and switching and displaying data acquired from the switched device 3 in a single image. Have The display communication processing unit 211 includes a display switching unit 211a and a communication switching unit 211b in order to realize this function.

<Display switching section>
The display switching unit 211a (display switching unit) inquires of the ID change determination unit 213 whether there is a change in the value of the device ID at the above-described device designation address at the end of the display scan. When the display switching unit 211a receives a change notification that the value of the device ID has changed from the ID change determination unit 213 as a result of the inquiry, the display switching unit 211a sends a display switching request to switch to display corresponding to the changed device ID to the display communication processing unit 211. Issue. Also, the display switching unit 211a does not issue a display switching request when it does not receive a change notification from the ID change determination unit 213. In response to the display switching request, the display communication processing unit 211 switches and updates the display in the next display scan (display switching unit).

<Communication switching unit>
Upon receiving the change notification, the communication switching unit 211b (communication switching unit) receives the access ticket provided from the ID change determination unit 213, and causes the display communication processing unit 211 to switch the communication partner device. Issue. Here, the access ticket is information on a device designation address, that is, a device ID. The display communication processing unit 211 performs communication by switching devices based on the access ticket in the next display scan (communication switching unit).

(B) Configuration of ID changing unit When receiving a predetermined instruction, the ID changing unit 212 (ID changing unit) inputs a device ID to the device designation address in accordance with the instruction (changes the device ID). The above instruction is given, for example, when the user performs a touch operation on the image for directly changing the value of the device ID or selecting the device or the type (name) of data to be acquired. Further, the ID changing unit 212 acquires an initial ID from the device setting data when the programmable display device 2 is activated, and sets it as a device ID in the device designation address.

(C) Configuration of ID Change Determination Unit The ID change determination unit 213 (ID change determination unit) changes the value of the device ID at the device specified address in response to an inquiry from the display switching unit 211a at the end of the display scan. Determine whether or not. The ID change determination unit 213 previously copies the device ID written in the device designation address in the previous setting to another area of the work memory 27, and at the time of the determination, the device ID and the device ID at the device designation address are used. Compare. As a result of the comparison, the ID change determination unit 213 determines that the value of the device ID has not changed when they match, and determines that the value of the device ID has changed when they do not match. In addition, the ID change determination unit 213 gives a device ID mismatch determination result as a change notification to the display switching unit 211a and the communication switching unit 211b, and changes the access ticket to the changed device ID to change the communication switching unit 211b. To give.

(D) Configuration of Operation Log Data Creation Unit The operation log data creation unit 214 (operation log data creation unit) periodically inquires of the display communication processing unit 211 whether or not an operation has occurred by the user, and from the display communication processing unit 211. Operation log data is created based on the obtained operation content. Specifically, the operation log data creation unit 214 creates log-in data and log-out data with occurrence time information (date and time) as log data for log-in and log-out operations on the programmable display 2. To do. The operation log data creation unit 214 also performs operations such as an image number, a component ID of a component image in the image, a device ID, and a data acquisition address corresponding to the device ID as operation log data for a touch operation on the image. Created with information on the time of occurrence.

  The operation log data creation unit 214 uses the touch operation log function, and when a touch operation for switching the node device (device ID) is performed on the image by the user, the operation log data creation unit 214 displays the component image displaying data in the image. The operation log data is generated using the component ID. This component image is associated with the device ID as described above. Therefore, the operation log data indicates that the operation for displaying the component image has been performed by the touch operation.

[1-2-2 (5). Realization form of HMI processing unit]
The HMI processing unit 21 configured as described above is a functional block realized by causing the above-described CPU included in the programmable display 2 to execute the above-described HMI control program (data display program). The program code (execution format program, intermediate code program, source program) of the HMI control program can be recorded on a computer-readable recording medium configured to be separable from the programmable display device 2. The program code may be installed in the programmable display device 2 from the recording medium.

  As the recording medium, for example, a tape-type, disk-type, or semiconductor memory-type medium can be used. As the tape medium, a magnetic tape, a cassette tape or the like is used. Disk media include magnetic disks such as floppy (registered trademark) disks / hard disks, CD-ROM (compact disc read-only memory) / MO (magneto-optical) / MD (Mini Disc) / DVD (digital versatile disk). / Includes optical discs such as CD-R (CD Recordable). The semiconductor memory system is a card system such as an IC card (including a memory card) / optical card, or a mask ROM / EPROM (erasable programmable read-only memory) / EEPROM (electrically erasable and programmable read-only memory) / flash. ROM or the like is used.

  When the programmable display 2 is connected to a network (not shown), the HMI control program may be downloaded via the network. The network is not limited to the above-described Internet or LAN, and an intranet or an extranet can be used. In addition, ISDN (integrated services digital network), VAN (value-added network), CATV (community antenna television) communication network, virtual private network, telephone line network, mobile communication network, satellite communication A net or the like is also available. Further, the transmission medium constituting the network is not particularly limited. For example, IEEE (institute of electrical and electronic engineers) 1394, USB, power line carrier, cable TV line, telephone line, ADSL (asynchronous digital subscriber loop) line, etc. It may be wired. Alternatively, as the transmission medium, infrared data such as IrDA (infrared data association) and remote control, Bluetooth (registered trademark), 802.11 wireless, HDR (high data rate), mobile phone network, satellite line, terrestrial digital network It can also be used wirelessly.

  However, when the HMI control program is downloaded from the network in this way, the download program may be stored in advance in the programmable display 2 or installed from another recording medium.

[2. (Data display operation when switching the connected device of the programmable display)
Here, the data display operation when the connected device 3 is switched in the programmable display device 2 will be described with reference to the flowchart of FIG.

  First, when the programmable display device 2 is activated, a display scan by the display communication processing unit 211 is started (step S1). Further, when the programmable display device 2 is activated, the ID changing unit 212 sets the initial ID as a device ID to the device designation address. At this time, the display communication processing unit 211 performs communication with the connected device 3 specified by the initial ID based on the set initial ID (step S2). Thereby, the data acquired from the connected device 3 is displayed on the image.

  Next, when a series of display processing of the image is performed and the display scan is completed, an inquiry from the display switching unit 211a is received, and the ID change determination unit 213 determines whether or not the value of the device ID at the device designation address has changed. Is determined (step S3). Here, if it is determined that the value of the device ID has changed, a change notification is given from the ID change determination unit 213 to the display switching unit 211a and the communication switching unit 211b, and a new access ticket is given to the communication switching unit 211b. Given, the next display scan is started (step S4).

  In this display scan, the display communication processing unit 211 communicates with the connected device 3 specified by the changed device ID value (step S5). At this time, desired data is acquired from the data acquisition address in the memory 31 of the connected device 3 and written into the data memory 25. Then, the display communication processing unit 211 switches the display of data on the image in accordance with the data obtained from the connected device 3, whereby the data is displayed on the image (step S6).

  On the other hand, if it is determined in step S3 that the value of the device ID has not changed, no change notification is given from the ID change determination unit 213 to the display switching unit 211a and the communication switching unit 211b. In this state, the next display scan is started (step S7). In this display scan, the connected device 3 that is the communication partner is the same as in the previous display scan. Therefore, the data acquired by the display communication processing unit 211 communicating with the same connected device 3 is displayed on the image. It is displayed (step S8).

[3. (Image display operation when switching connected devices)
Then, the specific example of operation | movement of the programmable display 2 which displays the data obtained by switching and communicating the connection apparatus 3 as mentioned above is demonstrated.

  Here, as illustrated in FIGS. 3A to 3C, an example in which a temperature controller is used as the connection device 3 and temperature data is displayed on the temperature monitor image 101 for temperature monitoring will be described.

  The temperature monitor image 101 includes a common image 102 and a data display image 103. The common image 102 is a base image used without switching to data acquired from each connected device 3 in common. The data display image 103 is a component image that displays data acquired from the connected device 3 and is switched according to the data to be displayed. The data display image 103 includes a selector list 103a and a data display unit 103b. The selector list 103a is a component image that displays a list of temperature (data) types in a pull-down manner when the user performs a touch operation. The data display unit 103 b is a component image that displays data acquired from the currently connected device 3.

  First, as shown in FIG. 3A, the furnace temperature is displayed in the data display image 103 immediately after the programmable display 2 is activated. The furnace temperature is furnace temperature data obtained from the connection device 3 specified by the initial ID.

  In this state, when the selector list 103a is touched by the user, as shown in FIG. 3B, the selector list 103a displays the types of temperatures that can be selected. In the example shown in FIG. 3B, the cooling water temperature, the hydraulic pressure temperature, and the ambient temperature can be selected. These temperatures are acquired from different connection devices 3.

  Further, from this state, as shown in FIG. 3C, when the hydraulic pressure is selected from the selector list 103a by the user's touch operation, the ID change unit 212 holds the hydraulic pressure at the device ID at the device designation address. To the device ID of the connected device 3 to be rewritten. Then, the ID change determination unit 213 determines that the value of the device ID at the device specified address has changed. In the next display scan, the display communication processing unit 211 performs communication with the connected device 3 specified by the changed device ID value. At this time, data of a desired hydraulic pressure temperature is acquired from the data acquisition address in the memory 31 of the connected device 3, and the data is displayed on the data display unit 103b.

  By the way, in order for the user to view the temperature monitor image 101, a touch operation for displaying the temperature monitor image 101 is performed, so that an operation log is created as operation log data by the operation log data creation unit 214. Recording of such operation log data is also performed in a conventional programmable display. In addition, in the programmable display device 2 of the present embodiment, the operation log data creation unit 214 creates operation log data of the touch operation of the selector list 103 a described above and stores it in the data memory 25. As a result, it is understood which data of the connected device 3 was displayed on the data display unit 103b based on the device ID included in the operation log data.

[Embodiment 2]
Another embodiment of the present invention will be described below with reference to FIGS.

  In the present embodiment, components having functions equivalent to those of the components in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

[1. (Control system configuration)
As shown in FIG. 1, the control system 11 according to the present embodiment includes a programmable display 2, a plurality of connection devices 3, and a plurality of PLCs 5.

[1-1. Configuration of PLC]
The PLC 5 (device) is connected to these connection devices 3 via a communication cable 4 so that serial communication with a plurality of connection devices 3 is possible. The PLC 5 is connected to the programmable display 2 via the communication cable 6 so that serial communication and network communication can be performed with the programmable display 2.

  The PLC 5 captures the state of the input source connection device 3 via the input unit, and gives a control instruction to the output destination connection device 3 via the output unit. The PLC 5 performs the above operation at every predetermined scan time such as several tens of ms, for example, according to a sequence program (such as a ladder program) created by the user.

  The memory 51 (device memory) in the PLC 5 specifies data (word data or bit data) indicating the state of the connected device 3 (data output from the connected device 3 or a control instruction to the connected device 3) by a device address. Is stored in the area. In the memory, a word device and a bit device are set. The word device is set as an area for storing word data such as numeric values as input / output data, and is designated by a word address (device address). The bit device is set as an area for storing bit data such as an on / off state, and is set by a bit address (device address).

  Thus, any word device or bit device in the memory 51 can be accessed by designating a device address. Then, it is possible to give a control instruction to the connected device 3 or to individually retrieve data of the connected device 3.

[1-2. Programmable display configuration
Since the programmable display 2 has basically the same configuration as the programmable display 2 of the first embodiment, the description of the same configuration is omitted. However, since the programmable display 2 of this Embodiment differs from the programmable display 2 of Embodiment 1 in communicating with PLC5, only the structure required in connection with this is demonstrated.

[1-3. Configuration of interface section]
The interface unit 24 communicates with the PLC 5 instead of the programmable display device 2 according to the first embodiment communicating with the connection device 3.

[1-4. Device setting data stored in user memory]
As the above-described device names included in the device setting data, since a plurality of PLCs 5 are connected to the programmable display device 2, device names such as [PLC1], [PLC2],... Are assigned.

[1-5. Configuration of display communication processing unit]
The display communication processing unit 211 basically has the same function as the display communication processing unit 211 of the programmable display device 2 in the first embodiment, but communicates with the PLC 5 and communicates with the PLC 5. Send and receive data. Further, the display communication processing unit 211 has a device monitor function.

  The device monitor function displays the data on a device monitor image in order to monitor the data in the memory 51 of the operating PLC 5. In order to shift to the device monitor mode, for example, the device monitor mode is selected from the menu bar displayed by touching two or three predetermined diagonal points of the four corners on the display surface of the screen 22. Done. Alternatively, an operation button for shifting to the device monitor mode may be provided in advance on the image created by the user, and the device monitor mode may be shifted by a touch operation of the operation button.

[2. Programmable display device monitor operation)
Here, the data display operation when the PLC 5 is switched in the device monitor process in the programmable display device 2 will be described with reference to the flowchart of FIG. The basic processing is [3. The data display operation at the time of switching the connected device of the programmable display] is the same as that described above except that the communication partner is the PLC 5, and therefore, the processing different from this processing will be mainly described.

  In step S2, communication is performed with the PLC 5 specified by the initial ID. As a result, the data acquired from the PLC 5 is displayed on the device monitor image (device monitor image).

  In step S5, communication is performed with the PLC 5 specified by the changed device ID value. At this time, desired data is acquired from the data acquisition address in the memory 51 of the PLC 5 and written into the data memory 25. Then, the display communication processing unit 211 switches the display of data on the device monitor image in accordance with the data obtained from the PLC 5, and the data is displayed on the device monitor image (step S6).

  Further, in the display scan in step S7, the PLC 5 serving as the communication partner does not change. Therefore, in step S8, the display communication processing unit 211 displays data acquired by performing communication with the same PLC 5 on the device monitor image.

[3. (Image display operation of device monitor)
Then, the specific example of operation | movement of the programmable display 2 which performs a device monitor with the data obtained by switching PLC5 as mentioned above and communicating is demonstrated.

  Here, an example in which a device monitor image 201 for device monitoring is displayed as shown in FIG. 5 will be described. The device monitor image 201 includes a common image 202, a device selection block 202, and data display blocks 203 to 206.

  The common image 202 is a base image used in common for data acquired from each PLC 5. The device selection block 202 is a component image that displays the device names ([PLC1], [PLC2],...) Of the PLC 5 connected in a pull-down manner when the user performs a touch operation. Data display blocks 203 to 206 (data display units) are component images for displaying data (data of data acquisition addresses “D0000 to D0003”) acquired from the currently communicating PLC 5.

  First, as shown in FIG. 5, immediately after the programmable display device 2 is activated, the device monitor image 201 is acquired from the PLC 5 of the device name [PLC1] specified by the initial ID in the data display blocks 203 to 206, respectively. Data is displayed.

  From this state, when the device selection block 202 is touched by the user, although not shown, the device names of the PLCs 5 that can be selected by the device selection block 202 are expanded and displayed. When, for example, the device name [PLC2] is selected from the device selection block 202, the ID changing unit 212 rewrites the device ID at the device designation address to the device ID corresponding to the PLC5 of the device name [PLC2]. Then, it is determined by the ID change determination unit 213 that the value of the device ID at the device specified address has changed, and the device specified by the changed device ID value by the display communication processing unit 211 in the next display scan. Communication is performed with the PLC 5 having the name [PLC2]. At this time, desired data is acquired from the data acquisition addresses “D0000 to D0003” in the memory 51 of the PLC 5, and the data is displayed in the data display blocks 203 to 206.

  Further, in the programmable display device 2 of the present embodiment, the operation log data creation unit 214 creates the operation log data of the touch operation of the device selection block 202 described above and stores it in the data memory 25. Thereby, it can be seen which PLC 5 data was displayed on the data display blocks 203 to 206 based on the device ID included in the operation log data.

[Summary of Embodiment]
As described above, when the programmable display device 2 according to the first and second embodiments determines the change in the value of the device ID at the device-specified address by the ID change determination unit 213, the connected device 3 identified by the device ID. The communication is switched to the PLC 5 to acquire data. Moreover, the programmable display 2 displays the newly acquired data on the image common to each connection apparatus 3 and PLC5. In this way, the data of each connected device 3 and PLC 5 can be switched and displayed on the same image through the data ID address of the connected device 3 and PLC 5 as communication partners via the device ID value at the device designated address. This is because the is indirectly specified. Therefore, it is only necessary to prepare one common image for displaying the data of the connected device 3 and the PLC 5, and the man-hour for creating the image can be greatly reduced, and the image data in the user memory 26 can be reduced. Storage capacity can be reduced.

  In addition, when receiving the above-described completed image or dedicated component image to the connection device 3 and the PLC 5, conventionally, the setting of the node device and the address setting are fixed in advance according to the connection device. . For this reason, when the user wants to make a setting independently, the user needs to individually reset a plurality of connected devices, and the completed image and the dedicated component image cannot be used efficiently.

  On the other hand, according to the configurations of the first and second embodiments, it is only necessary to set the device ID, so that it is not necessary to perform device setting and address setting again as necessary. Therefore, it is possible to efficiently use the provided completed image or dedicated component image.

  Furthermore, when a touch operation for changing the device ID is performed on the image by the operation log data creation unit 214, the operation log data is created and stored in the data memory 25. Thereby, it can be understood which connected device 3 or PLC 5 data is displayed based on the data acquisition address included in the operation log data.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  When the device ID assigned to a plurality of connected devices is changed by a touch operation on an image or the like, the programmable display of the present invention switches communication with the device corresponding to the device ID. Data acquired from the device is switched and displayed in a single image. Therefore, the programmable display of this invention can be utilized suitably for the control system which displays the data of a some apparatus.

DESCRIPTION OF SYMBOLS 1 Control system 2 Programmable display 3 Connection apparatus (equipment)
5 PLC (equipment)
11 Control System 21 HMI Processing Unit 25 Data Memory 26 User Memory 27 Working Memory (Internal Memory)
31 memory 51 memory 101 temperature monitor image 102 common image 103 data display image 103b data display unit 201 device monitor image 203 to 206 data display block (data display unit)
211 Display communication processing unit (display switching means, communication switching means)
211a Display switching unit (display switching means)
211b Communication switching unit (communication switching means)
212 ID change part (ID change means)
213 ID change determination unit (ID change determination means)
214 Operation log data creation unit (operation log data creation means)

Claims (3)

In a programmable display that communicates with a plurality of connected devices to acquire data stored in the memory of the device and displays it on an image,
An internal memory for storing an ID for identifying each device at a predetermined address;
ID changing means for changing the ID in response to an instruction;
ID change determination means for determining presence or absence of a change in the value of the ID at the address;
When it is determined that the value of the ID has changed, communication switching means for switching a communication partner to the device corresponding to the ID;
A programmable display comprising: a display switching means for switching a display to data acquired from the device of the switched communication partner on the single image.   The programmable log generator according to claim 1, further comprising operation log data creating means for creating operation log data for recording a touch operation for giving the instruction on the image including the ID. display.   The data display program for functioning a computer as each means of the programmable display of Claim 1 or 2.

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