JP2006039870A - Programmable display, display control program, recording medium for recording this program, screen forming device, screen forming program, and recording medium with the program recorded thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a programmable display having the function of measuring the current-carrying time of a current-carrying device and the number of times that the device carries current. <P>SOLUTION: An HMI process part 21 of the programmable display 2 measures the current-carrying time of a contact and counts the cumulative number of times that the contact carries current, by reading into a data memory 24 the state (ON state) of the device 8 of the contact stored in an input/output memory 25. The HMI process part 21 displays the measured values on a display 28. In this way, it is made possible to confirm the current-carrying time of the device 8 caused to carry current by the turning on of the contact and the number of times that the device carries current. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a programmable display having a function of measuring the energization time of a contact.

  An industrial control device called a programmable logic controller (hereinafter referred to as a PLC) implements various controls including sequence control according to a sequence program created by a user. In general, a target system controlled by a PLC often uses energization devices such as a motor, a lamp, and a relay as devices connected to the PLC.

  Such an energizing device has a specification that limits the operation. For example, the operation limit is indicated by an energization time and the number of energizations for an energized device. For this reason, a system for performing maintenance such as exchanging energized devices based on information on the energization time is known (for example, Patent Document 1). Patent Document 1 manages for each programmable display device (programmable display) that notification is made when the actual usage information (usage time or number of on / off times) of a component exceeds the value of the lifetime information of a component with a limited life. Discloses what to do.

  Said programmable display communicates with PLC which controls a device as HMI (Human Machine Interface) of a control system, and displays / controls the state of a device. The operation to display the device status on the screen and the operation to control the device status according to the operation are specified based on the screen data created on the control host computer and downloaded to the programmable display. Is done.

The programmable display device includes a touch panel that enables input on a display as an input device so that it can operate normally even in a poor environment. Based on the display of the programmable display, the operator grasps the state of the device to be controlled and operates the touch panel to input a control instruction to the device to the programmable display.
JP 2000-163286 A (released on June 16, 2000)

  The technology disclosed in Patent Document 1 only notifies that when the usage time or number of times of a component exceeds a predetermined life time or number of times, and notifies the current energization time and the number of times of energization of the energized device. Can not. As with the above-mentioned parts with a limited life, the current-carrying equipment often has a normal life defined by a parts provider (manufacturer or seller), but the actual life varies from part to part. In performing maintenance, it is desirable to use the energized device for a long period of time as much as possible from the viewpoint of reducing the frequency of stopping the system and reducing component costs. However, in the conventional technology described above, it is determined that the part has reached the end of its life based on the specified life, so the part can be replaced even though it can still be used, or the part can reach its end of life sooner than the specified value. Inconvenience that it has reached.

  For this purpose, it is desirable that the programmable display measures and displays the energization time and the number of energizations of the energized device so that the user can check the current energization time and the number of energizations. However, in order for the programmable display to measure the energization time and the number of energizations of the energized device, a program for measurement using a script function etc. that the programmable display has the energization status of the contact for turning on / off the energization of the energized device Need to create.

  The present invention has been made in view of the above problems, and by providing a programmable display with a function of measuring and displaying the energization time and the number of energizations of the energized device, the actual energization status of the energized device can be obtained. It aims at providing the programmable display which can be confirmed.

  The programmable display according to the present invention includes, for each contact, contact state storage means for storing the contact state in accordance with a sequence program stored in advance, and the energization of the energization device is performed according to the contact state acquired from the contact state storage means. Programmable display comprising: a contact state acquisition unit that acquires the state of the contact from the contact state storage unit of the control device that controls the display; and a display control unit that displays the acquired state of the contact on a previously created screen In order to solve the above-mentioned problem, the display device includes energization time measuring means for measuring the contact energization time from the change of the acquired contact state to the energization state to the non-energization state, and the display control The means displays the measured energization time on the screen.

  In the above configuration, when the contact is energized, the state is stored in the contact state storage unit, the energization device is energized according to the state, and when the contact is in the non-conduction state, the state is stored in the contact state storage unit. It is stored, and the energization of the energized device is stopped according to the state. At this time, on the basis of the contact state acquired from the contact state storage means of the control device, the energization time measuring means measures the energization time from when the contact becomes conductive to when it becomes non-conductive. Since this energization time is displayed on the screen by the display control means, the user can check the energization time displayed on the screen.

  The programmable display includes a cumulative time calculation unit that calculates a cumulative value of the measured energization time, a cumulative time storage unit that stores the cumulative value of the energization time, and a cumulative value stored in the cumulative time storage unit It is preferable that the display control means displays the cumulative value of the energization time stored in the cumulative time storage means on the screen.

  In such a configuration, the accumulated time measured by the accumulated time measuring means is stored in the accumulated time storage means, and the stored accumulated time is displayed on the screen by the display control means. In addition, since the accumulated time stored in the accumulated time storage means is reset by the accumulated time resetting means, if it is necessary to newly calculate the accumulated time for repair or replacement of the energized equipment, the accumulated time is reset by resetting the accumulated time. A new time calculation can be started.

  In this programmable display, the time average value calculating means for calculating an average value of a plurality of past cumulative values reset in the cumulative time storage means, and the cumulative value of the energization time stored in the cumulative time storage means And determining means for determining whether or not the average value has exceeded the average value, and the display control means preferably notifies when the cumulative value of the energization time exceeds the average value.

  In such a configuration, the average value of the past accumulated time when the measurement is ended by the reset is calculated by the time average value calculating means, and the current accumulated value stored in the accumulated time storage means is the calculated accumulated time. When the determination means determines that the average value has been exceeded, the display control means notifies that fact. As a result, the user can grasp that the energized device in use has reached the replacement time based on the average life determined from the past results of the energized device of the same type as the currently used energized device. Therefore, it is possible to appropriately perform the maintenance of the energized equipment based on the actual operation results rather than the life specified in advance.

  Another programmable display according to the present invention includes contact state storage means for storing the contact state in accordance with a sequence program stored in advance for each contact, and the energization device according to the contact state acquired from the contact state storage means Contact state acquisition means for acquiring the contact state from the contact state storage means of the control device for controlling the energization of the display, and display control means for displaying the acquired contact state on a previously created screen. In order to solve the above-mentioned problem, the programmable display device includes an energization count measuring unit that counts the energization count based on the obtained change in the contact state, and displays the energization count measured by the display control unit on the screen. It is characterized by displaying.

  In the above configuration, when the contact is energized, the state is stored in the contact state storage unit, the energization device is energized according to the state, and when the contact is in the non-conduction state, the state is stored in the contact state storage unit. It is stored, and the energization of the energized device is stopped according to the state. At this time, the number of energizations of the contact is measured by the energization number measuring unit based on the change of the contact state acquired from the contact state storage unit of the control device, for example, the change from the non-energized state to the energized state. Since the number of energizations is displayed on the screen by the display control means, the user can check the number of energizations displayed on the screen.

  The programmable display includes a number storage unit that stores the measured number of energizations, and a number reset unit that resets the number of energizations stored in the number storage unit, and the display control unit stores the number of energizations in the number storage unit. It is preferable to display the stored energization count on the screen.

  The number of energizations measured as described above is stored in the number storage means, and the stored number of energizations is displayed on the screen by the display control means. In addition, since the number of energizations stored in the number of times storage means is reset by the number of times resetting means, if it is necessary to newly calculate the number of times of energization due to repair or replacement of the energized equipment, the number of times of energization is calculated by resetting the number of times Can be started anew.

  In this programmable display, the number average value calculating means for calculating an average value of a plurality of past times reset in the number storage means, and the energization count stored in the number storage means exceeds the average value. It is preferable that the display control means notifies that when the number of energizations exceeds the average value.

  In such a configuration, the average value of the past number of times the measurement has been completed by the reset is calculated by the number average value calculating unit, and the current number stored in the number storage unit exceeds the average value of the calculated number of times. If it is determined by the determination means, this is notified by the display control means. As a result, the user can grasp that the energized device in use has reached the replacement time based on the average life determined from the past results of the energized device of the same type as the currently used energized device. Therefore, it is possible to appropriately perform the maintenance of the energized equipment based on the actual operation results rather than the life specified in advance.

  The display control program of the present invention is a display control program for operating the programmable display, and causes a computer to function as each means. The display control program is provided by being recorded on a computer-readable recording medium. Thereby, it becomes possible to confirm on the screen the energization time or the energization number of the contact in the programmable display.

  The screen creation device of the present invention is a screen creation device for creating the screen for display on a programmable display provided with the energization time measuring means, and information for specifying a contact for measuring the energization time. It is characterized by comprising contact information specifying means for setting. Thereby, the programmable display can measure energization time based on the specified contact.

  Another screen creation device of the present invention is a screen creation device for creating the screen for display on a programmable display provided with the energization count measuring means, and for specifying a contact for measuring the energization count. It is characterized by comprising contact information specifying means for setting information. Thereby, the programmable display can measure energization time based on the specified contact.

  The screen creation program of the present invention is a screen creation program for operating one of the two screen creation devices, and is characterized by causing a computer to function as each of the means. The screen creation program is provided by being recorded on a computer-readable recording medium. As a result, it is possible to set contact information for measuring energization time or contact information for measuring the number of energization times.

  The programmable display of the present invention has a function of measuring the energization time or the number of energizations of the contact and a function of displaying the measured value, thereby easily grasping the energization time or the energization number of the current contact on the screen. be able to. Therefore, it is possible to grasp the current energization state of the energization device that is energized in the energization state of the contact, and there is an effect that maintenance of the energization device can be appropriately performed according to the current state.

  An embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, the control system 1 according to the present embodiment includes a plurality of programmable displays 2..., A plurality of PLCs 3, a host computer 4, and an administrator computer 5.

  The programmable display 2..., The host computer 4 and the administrator computer 5 are similar to a local area network (LAN) made up of Ethernet (registered trademark) or the like that can communicate with a common communication protocol (common communication protocol). They are connected to each other via a common network 6. On the other hand, the programmable display 2 and the PLC 3 are individually connected via a dedicated network 7 formed of a serial cable or the like that can perform communication using a unique communication protocol (dedicated communication protocol) for each PLC 3.

  The dedicated communication protocol is often different for each PLC 3 model, such as for each manufacturing company or for each product even if it is the same company because the PLC 3 has been developed from a sequencer. Therefore, for example, if the PLC 3 and the host computer 4 are connected to each other to construct a network, it is necessary to unify the models of the PLC 3 in the control system 1, and the large-scale control system 1 can be constructed. difficult.

  On the other hand, the control system 1 according to the present embodiment connects the programmable display 2 connected to each PLC 3 to the host computer 4 and the administrator computer 5 through the common network 6 and is used in the common network 6. As the common communication protocol, a common protocol determined independently of the dedicated communication protocol is adopted. Furthermore, each programmable display device 2 has a function of converting a protocol, as will be described later, for example, by performing protocol conversion such as instruction code conversion, argument conversion, or control code conversion during transmission. The communication between the host computer 4 and other programmable display 2 and the PLC 3 connected to the own device is relayed.

  In such a configuration, devices on the common network 6 such as the host computer 4 and the programmable display 2 are common via the common network 6 regardless of the model of the PLC 3 connected to the other programmable display 2. Can communicate with protocol. As a result, it is easy to mix different types of PLCs 3 in the control system 1. Further, in the above configuration, the programmable display 2 is an essential configuration for the control system 1 unlike the configuration in which the PLCs 3 are connected to each other. Further, since the programmable display 2 operates as an HMI, there is a surplus in computing capacity compared to the PLC 3. Because there is, it handles most of the communication. For example, the PLC 3 can be excluded from the communication path when the host computer 4 and the programmable display 2 communicate with each other like downloading screen data. Therefore, the load on the PLC 3 can be reduced, and the calculation capability required for the entire control system 1 can be reduced. Note that the programmable display device 2 can perform protocol conversion without improving the calculation capability for protocol conversion because the calculation capability is available while waiting for an operator's operation.

  As shown in FIG. 2, the PLC 3 includes a CPU 31, a system memory 32, a program memory 33, a data memory 34, an input / output memory 35, and an I / O 36.

  The CPU 31 is a central part of the control, and executes (scans) a sequence program such as a ladder program LP created by the user via the I / O 36 in accordance with the control system program CSP stored in the system memory 32. Based on a signal input from the device 8 (an input device such as a switch, a relay, or a sensor), an arithmetic process such as giving a control instruction or control data to the device 8 (an output device such as a lamp, a motor, or an actuator) or an input / output Control of writing / reading data to / from the memory 35 or the like is performed.

  The system memory 32 includes a ROM or the like for storing the control system program CSP.

  The program memory 33 includes a flash memory or the like for storing, for example, the ladder program LP as the sequence program. The data memory 34 is composed of a RAM or the like for temporarily storing data such as operation data during execution of the sequence program. The input / output memory 35 includes a RAM or the like for temporarily storing data such as input / output data exchanged with the device 8.

  The I / O 36 is a device in which an input circuit and an output circuit are integrally provided, and is a part having an interface function connected to the device 8, and is a circuit such as an A / D converter or a D / A converter. Is included. The I / O 36 exchanges digital signals or analog signals input / output with these devices 8 with the CPU 31.

  Here, the input / output memory 35 will be described in more detail.

  The input / output memory 35 has an input memory unit and an output memory unit. The input memory 51 has the same number of registers that store the state of the input device provided as the device 8 as the number of terminals to which the input device can be connected. The output memory 52 has the same number of registers that store the state of the output device provided as the device 8 as the number of terminals to which the output device can be connected. In particular, the input memory 51 stores ON / OFF states of contact-type input devices (hereinafter simply referred to as contacts) such as switches, relays, and contact-type sensors as binary information of “1” or “0”. A register functioning as a possible bit device is provided as a contact device CD as shown in FIG. Further, the input memory 51 functions as a word device when the device 8 writes a detection value or the like.

  The control system program CSP rewrites the contact state (ON state / OFF state) stored in the contact device CD to the latest state according to the ladder program LP, and writes it to the register of the output memory 52 according to the contact state. The energization state of the energizing device as the output device is rewritten to control energization of the energizing device.

  Further, the input / output memory 35 has a split time area ST, an accumulated time area AT, and an accumulated number of times area AN in the input memory 51 in association with the contact device CD.

  The split time area ST is a register that holds the time from when the contact is turned on (energized) to when it is turned off (energized). The cumulative time area AT is a register that holds a cumulative value of energization time. The cumulative number area AN is a register that holds the number of times the contacts are energized.

  Specifically, each of the registers is configured as shown in FIG. One contact device DM is assigned to each contact address (input terminal address or device address) X100, X200, X300,..., Xn00 as a contact device CD (memory address DM1, DM2, DM3,..., DMn). . Split time area ST (memory addresses DM101, DM201, DM301,..., DMn01), cumulative time area AT (memory addresses DM102, DM202, DM302,. Similarly, each register of DMn03) is assigned to each of contact addresses X100, X200, X300,..., Xn00. The memory area allocated to each contact address X100, X200, X300,..., Xn00 in the input memory 51 is normally used as a contact device CD, but can be freely used by setting the control system program CSP. In the embodiment, each register is assigned to each memory area as described above.

  Thus, the contact device CD has a function of holding the energization time and the number of energizations of the contacts by attaching each register for holding the time / time information as described above.

  As shown in FIG. 1, the programmable display 2 is a computer that includes an arithmetic processing unit such as a CPU, and realizes an operation function and a display function specific to the programmable display by executing a control program. The programmable display 2 that is preferably used as the HMI of the control system 1 is based on screen data determined by combining processing instructions (tags) to be described later, the operation when displaying the state of the device 8 on the screen, The operation for controlling the state of the device 8 according to the operation on the screen is specified.

  This programmable display 2 is displayed via the PLC 3 connected to its own device by communication with the PLC 3 via the dedicated network 7, or via the other programmable display 2 or the PLC 3 connected thereto. For example, it has a function of acquiring the state of each device 8 that displays the state on the screen and displaying the state of each device 8 on the display 28 described later. The programmable display 2 has a function of instructing the device 8 to perform state control in response to an operation on the touch panel 27 described later. Moreover, the programmable display 2 has the function of PLC (control apparatus) by providing the memory and I / O which store the control system program CSP and the ladder program LP so that it may mention later.

  The acquisition / change of the state of the device 8 may be instructed each time, or a cache is prepared in the programmable display 2, and the cache is accessed at the time of acquisition / change and at predetermined time intervals or at predetermined intervals. Communication may be performed for each event to synchronize with the actual device address of the device 8.

  In order to realize the above functions, the programmable display 2 includes an HMI processing unit 21, a system memory 22, a program memory 23, a data memory 24, an input / output memory 25, an I / O 26, a touch panel 27, a display 28, and an interface unit. (I / F in the figure) 29a and 29b are provided. Hereinafter, each main part of the programmable display device 2 will be described in detail.

  The touch panel 27 is an input device provided for performing input on the display screen of the display 28. The display 28 is preferably a flat display such as a liquid crystal display or an EL display in order to configure the programmable display device 2 to be thin.

  The interface unit 29 a is a communication control unit for the programmable display 2 to communicate with the host computer 4, the administrator computer 5, or another programmable display 2, and is connected to the common network 6. Data is transmitted to and from the host computer 4, the administrator computer 5, or each programmable display 2 by communication via the common network 6. On the other hand, the interface unit 29 b is a communication control unit for the programmable display device 2 to communicate with the PLC 3, and is connected to the dedicated network 7. Data is transmitted to and from the PLC 3 by communication via the dedicated network 7.

  In the communication system configured as described above, output data from the PLC 3 is transmitted to the programmable display 2 and further transferred to the host computer 4 or another programmable display 2 via the programmable display 2. In addition, the data set in the programmable display 2 is not only directly transmitted to the PLC 3, but also the setting data transmitted from the host computer 4 or another programmable display 2 is connected to the PLC 3 as the communication destination. It is transferred to the PLC 3 via the display 2.

  The HMI processing unit 21 performs various kinds of arithmetic processing and data processing to perform user screen display control, protocol conversion and data distribution processing, and measurement of contact energization time / number of times, which will be described later.

  The protocol conversion process is a process of converting from one communication protocol to the other communication protocol while referring to protocol conversion data described later stored in the system memory 22 when the communication protocols in the both networks 6 and 7 are different from each other. is there. In the data distribution process, when a preset distribution condition is satisfied, output data that is fetched from the device 8 into the memory of the PLC 3 and transmitted from the PLC 3 to the programmable display 2 is designated as a specified distribution destination, that is, This is a process of delivering to the host computer 4, the administrator computer 5, or another programmable display device 2.

  The protocol conversion process and the data distribution process are realized by executing the protocol conversion program and the data distribution program stored in the system memory 22 by an arithmetic processing unit such as a CPU. The display control process (display control function) will be described in detail later.

  The system memory 22, the program memory 23, the data memory 24, and the input / output memory 25 are memories having functions equivalent to the system memory 32, the program memory 33, the data memory 34, and the input / output memory 35, respectively. The I / O 26 is a circuit having a function equivalent to that of the I / O 36 described above.

  However, as described above, the system memory 22 stores a protocol conversion program, a data distribution program, and protocol conversion data, and also stores a display control system program for performing display control processing. The program memory 23 stores not only the ladder program LP but also screen data created by the user.

  The data memory 24 is mainly used for operations at the time of arithmetic processing such as display control, is used for temporary storage of data exchanged with the PLC 3, and logs data obtained from the PLC 3. Or setting value data (recipe data) to be given to the PLC 3 is used. Further, the data memory 24 provides an area for temporarily storing the energization time and the energization number of the contacts measured by the HMI processing unit 21.

  The display control system program (display control program) is a program for realizing a basic function for performing image display control. The functions realized by the display control system program in the HMI processing unit 21 will be described in detail later.

  The protocol conversion data may be in any format as long as the communication protocol can be mutually converted between the dedicated network 6 and the common network 7, but in this embodiment, the data indicating the format of data transmitted in the dedicated network 7 is used. A transfer format and a command conversion table indicating the correspondence between command codes transmitted in both networks 6 and 7 are stored.

  The communication protocol (dedicated communication protocol) is a protocol used in communication processing with the PLC 3, and is uniquely determined according to the model (manufacturer) of the PLC 3. This communication protocol includes a command code that instructs reading of data to the PLC 3. By combining this command code with an address associated with the control function of the PLC 3, data regarding a desired control function can be transmitted to the PLC 3.

  The screen data, which is data of the user screen, includes a base screen to be displayed on the display 28, data of parts, a processing instruction word W described later assigned to each part, and the like. The screen data is created by a drawing editor 43 described later and downloaded to the program memory 23.

  The screen data includes base screen data and part data.

  The base screen data is data of a base screen that is a background screen imitating the target system and the like, and parts and figures are arranged on the base screen. Parts and tags described later are synthesized as symbols on the base screen.

  The part data is composed of one or more part data combined with the base screen selected by the user using the drawing editor 43 described later. The parts prepared in the drawing editor 43 display dynamic changes such as graphics and graphs on which devices reflecting device data such as switches and setting value displays displayed on the base screen are displayed on the base screen. It is expressed as a graphic to be expressed at an arbitrary position. Each process by the moving image function for displaying these figures dynamically according to the state of the device 8 and touch input from the screen is realized by the following processing instruction word W (tag), and is arbitrarily set by the user. In addition, it is prepared in advance so as to be incorporated in the graphic as described above so that the user can easily handle it.

  On the user screen having the base screen and the part data as basic configurations, the parts are designed to move according to the operation of the device 8 by the tag function, and the operation status of the device 8 is visualized.

  As shown in FIG. 4A, the processing instruction word W included in the screen data is created for each event to be executed on the base screen. The processing instruction word W basically includes the file number F of the base screen on which the display control operation is to be executed, the event name T for specifying the operation content to be executed on the base screen, and the execution event for each execution event. A set of reference information R including one or a plurality of data to be referred to is provided.

  In the programmable display device 2 according to the present embodiment, a processing instruction word WL for displaying a measured value shown in FIG. 4B and a reset dialog box 121 described later by touch input shown in FIG. 4C (see FIG. 8). ) And the processing instruction word WT2 for resetting the measurement value by touch input shown in FIG. 4D are defined as the measurement contact definition tag TG (see FIG. 5). The measurement contact definition tag TG can be associated with at least one of the plurality of unit screens.

  The processing instruction word WL includes the file number F1 of the base screen, the event name N1 of the event indicating the value of the contact measurement time and the number of times measured by the HMI processing unit 21, and the reference information R. . This reference information R is a display coordinate range (X1, X2) for specifying a display area defined by a rectangle with a straight line connecting two points X1, X2 as a diagonal line, and an address of an area for storing a measurement value in the data memory 24. And a measurement memory address A. When the measurement value is updated in the storage area of the measurement memory address A in the data memory 24 by the processing instruction word WL, the HMI processing unit 21 refers to the value of the measurement memory address A and displays the display coordinate range of the base screen. The measured value is displayed in (accumulated time display field 114 in FIG. 7).

  The processing instruction word WT1 includes a file number F1 of the base screen, an event name NT1 of an event of displaying a reset button, and reference information R. The reference information R includes valid input coordinates (X1, X2) in the same range as the display coordinate range (X1, X2) and the file number F2 in the reset dialog box 121. The display control unit 11 to be described later of the HMI processing unit 21 displays a reset dialog box 121 when the measurement value display field is touched by the processing instruction word WT1.

  The processing instruction word WT2 includes the file number F2 of the reset dialog box 121, the event name NT2 of the event that the measured value is reset, and the reference information R. This reference information R includes the display coordinates of the reset button 123 at the time of restoration or the maintenance reset button 124 in the reset dialog box 121, that is, the effective input coordinate range (X3, X4) and the measurement memory address A described above. When the restoration reset button 123 or the maintenance reset button 124 is touched by the processing instruction word WT2, the display control unit 11 resets the value of the measurement memory address A accordingly.

  The display control function of the HMI processing unit 21 is realized by the display control unit 11 as shown in FIG. The display control unit 11 is a block of functions realized by executing the above-described display control system program. As the respective functions, a state acquisition unit 11a, a state change unit 11b, an energization measurement unit 11c, and an arithmetic processing unit. 11d.

  When acquiring the state of the device 8, the state acquisition unit 11 a reads necessary information from the state information indicated by the input / output memory (the aforementioned bit device or word device) in the PLC 3 into the data memory 24 in a timely manner. Further, the state acquisition unit 11 a acquires the contact state from the input memory 51 described above and writes it in the data memory 24.

  The display control unit 11 repeatedly reads out the processing instruction word W and executes the operation specified by the event name T of each processing instruction word W while referring to the read state information on the PLC 3 side. When the programmable display 3 operates as a control device (PLC), the display control unit 11 refers to necessary information among the state information indicated by the bit device or the word device written in the input / output memory 25. On the other hand, the processing instruction word W is repeatedly read, and the operation specified by the event name T of each processing instruction word W is executed. As a result, a display operation that changes according to a change in the state of the bit device or the word device is executed, and the state of the device 8 acquired from the PLC 3 or the device 8 is reflected in the display state of the parts on the user screen. In the display, a user screen is drawn on the display 28 using a VRAM or the like based on the screen data.

  When the display control unit 11 changes the state of the device 8 to give a control instruction or the like, the display control unit 11 repeatedly reads out the processing instruction word W, and the predetermined number on the user screen included in the reference information R in each processing instruction word W Specified by an effective input coordinate range in which touch input is valid and an event name T that specifies an operation (numerical value input operation, ON / OFF operation, etc.) of the touch panel 27. The content operation is passed to the state changing unit 11b. When the programmable display 3 operates as a control device, the display control unit 11 repeatedly reads out the processing instruction word W, the effective input coordinate range included in the reference information R in each processing instruction word W, and the touch panel 27. The operation having the contents specified by the event name T specifying the operation is passed to the state changing unit 11b.

  The state change unit 11b sets the received operation content in the input / output memory 35 in the PLC 3. Moreover, the state change part 11b sets the received operation | movement content in the input / output memory 25, when the programmable display 2 operate | moves as a control apparatus. As a result, the set control instruction is executed as the above-described operation in the PLC 3 or the programmable display 2 that changes in accordance with the change in the state of the bit device or the word device, and the state of the device 8 changes. The state changing unit 11b also writes (updates) the values of the energization time and the number of energizations of the contacts measured by the energization measuring unit 11c described later in the input memory 51.

  The aforementioned screen data is stored in the program memory 23 as a screen file SF in a file format formed in units of screens. A screen file SF of a screen for displaying the energization time and the energization number of the contact (for example, an energization state display screen 111 described later shown in FIG. 7) has the above-described measurement contact definition tag TG.

  Further, the display control unit 11 displays a screen (for example, an energization state display screen 111 described later in FIG. 7) for displaying the energization time and the number of energizations of the contact. The operation specified by the TG is executed.

  The energization measuring unit 11c reads the contact state written in the data memory 24, and uses the timer and counter functions that the programmable display device 2 originally has when the specified contact state changes from the OFF state to the ON state. Then, the time until the contact state changes to the OFF state is measured, and the result is written in the data memory 24. The energization measurement unit 11c updates the latest energization time by overwriting the energization time (split time) in the designated area of the data memory 24. The energization measuring unit 11c increments the energization count of the contact held in the data memory one by one every time the change of the contact from the non-energized state to the energized state is detected. measure.

  The arithmetic processing unit 11d has a function of calculating a cumulative value of energization time measured by the energization measurement unit 11c. Specifically, the arithmetic processing unit 11d reads and holds the accumulated energization time stored in the data memory 24. When the energization time is updated in the data memory 24, the operation processing unit 11d reads and holds the energization time. A new accumulated energization time is obtained by adding to the accumulated energization time, and the accumulated energization time in the data memory 24 is updated at regular intervals (for example, every scan of the ladder program LP). In addition, the arithmetic processing unit 11d compares the current energization time and the number of energizations (actually measured values) for each contact with an average value for a preset contact component of the same type, and when the actually measured value exceeds the average value In addition, the bit representing the magnitude of the average value of the actually measured values provided in the data memory 24 is rewritten from “0” (actually measured value <average value) to “1” (actually measured value ≧ average value).

  The aforementioned display control system program for realizing the display control unit 11 is recorded on a recording medium configured to be separable from the programmable display 2.

  The above recording media include tape systems such as magnetic tapes and cassette tapes, magnetic disk systems such as flexible disks and hard disks, optical disk systems such as CD-ROM, MO, MD, and DVD, IC cards (including memory cards), optical A card system such as a card is preferred. In addition, the program medium may be a medium that carries a fixed program including a semiconductor memory such as a mask ROM, EPROM, EEPROM, flash ROM, or the like.

  Further, since the control system 1 has a system configuration that can be connected to a communication network including the Internet, the control system 1 may be a medium that dynamically carries the program so as to download the program from the communication network. However, when the program is downloaded from the communication network in this way, the download program may be stored in the host computer 4 in advance or installed from another recording medium.

  Next, the host computer 4 will be described.

  A host computer 4 shown in FIG. 1 has a CPU, memory (RAM, ROM, etc.), external storage device (hard disk drive, MO drive, etc.), display device, and input device (keyboard, mouse, etc.) as in a general-purpose personal computer. )have. The host computer 4 includes a control unit 41, an interface unit (I / F in the figure) 42, a drawing editor 43, and a screen database 44.

  The control unit 41 is a part that performs arithmetic processing including a CPU and a memory, and executes a drawing editor 43 that is an application program on the operating system. The host computer 4 functions as an editor device (screen creation device) by causing the control unit 41 to execute the drawing editor 43.

  The interface unit 42 is a communication control unit for performing communication with the programmable display 2 and is connected to the common network 6.

  The drawing editor 43 is a screen creation program for creating the above-described user screen. The drawing editor 43 is also a program recorded on the recording medium as described above, and is installed in the host computer 4 in advance.

  The drawing editor 43 can create a user screen, which is a user's own screen, such as switches, lamps, numeric keys, various display parts (for example, numerical display, meter display and graph display), and various tags. A setting function, a drawing function, a text input function, etc. are provided. As parts, not only parts having a single function but also parts having a plurality of functions, such as a composite switch, a counter, and a timer, are prepared. The parts are registered in a library format so that the user can easily select them.

  The user screen created by the drawing editor 43 is stored in the screen database 44, but is transferred to the programmable display 2 via the interface unit 42 and downloaded to the program memory 23 as necessary.

  The drawing editor 43 includes a measurement contact definition unit 43a.

  The measurement contact definition unit 43a displays a measurement contact definition window 101 shown in FIG. 6 in order to provide the user with a user interface for setting information necessary for the measurement contact definition tag TG. In addition, the measurement contact definition unit 43a accepts various information input by the user from the measurement contact definition window 101, and creates a measurement contact definition tag TG based on the information.

  The measurement contact definition window 101 includes a measurement contact name setting field 102, a part name setting field 103, a contact address setting field 104, a split time storage address setting field 105, an accumulated time storage address setting field 106, and an energization count storage. And an address setting field 107.

  The measurement contact name setting field 102 is provided for setting the name of a contact that is a measurement target of the energization time and the number of energizations. This name is preferably a name associated with a specific part name set in the part name setting field 103. The part name setting field 103 is provided for setting the name of a part that is actually used as a contact.

  The contact address setting column 104 is provided for setting contact addresses X100, X200, X300,..., Xn00 (see FIG. 3) of the input memory 51 in which the measured energization time and energization count are written.

  The split time storage address setting field 105 is provided for setting one of the memory addresses DM101, DM201, DM301,..., DMn01 of the split time area ST in the input memory 51 in which the measured energization time is written. The accumulated time storage address setting column 106 is provided for setting one of the memory addresses DM102, DM202, DM302,..., DMn02 of the accumulated time area AT in the input memory 51 to which the measured accumulated energization time is written. The energization count storage address setting column 107 is provided for setting one of the memory addresses DM103, DM203, DM303,..., DMn03 of the count area AN in the input memory 51 in which the measured energization count is written.

  A screen for displaying the energization time and the number of energizations of the contacts is created as an energization state display screen 111 by the drawing editor 43 as shown in FIG. The energization state display screen 111 includes a measurement contact name display field 112, a split time display field 113, an accumulated time display field 114, and an accumulated number display field 115 as measurement value display fields. The energization state display screen 111 is also downloaded to the program memory 23 of the programmable display 2 as a user screen.

  The measurement contact name display field 112 is provided to display the name of the contact to be measured for the energization time and the number of times of energization, and is usually the same as the contact name set in the measurement contact name setting field 102 described above. The name is displayed. The split time display column 113 is provided for displaying the split time measured by the energization measuring unit 11c described above. The accumulated time display column 114 is provided for displaying the accumulated time measured by the energization measuring unit 11c. The cumulative number display column 115 is provided for displaying the cumulative number measured by the energization measuring unit 11c. The screen data of the energization state display screen 111 is attached with the measurement contact definition tag TG as described above in order to display the time and the number of times (see FIG. 5).

  Next, the measurement operation of the energization time and the energization number of the contact in the control system 1 configured as described above will be described. Here, it is assumed that, in the ladder program LP, a circuit in which the energized device is energized (turned on) when the contact is energized (turned on) is built in advance. In addition, here, a description will be given as an operation common to the case where contact data is acquired from the PLC 3 and the case where the programmable display 2 functions as a PLC.

  First, when the contact is energized, the energized device is also energized. At this time, the state of the contact device CD in the input memory 51 is rewritten to the energized state. Then, the state acquisition unit 11 a of the display control unit 11 reads the state of the contact device CD into the data memory 24. The energization controller 11c monitors the state of the contact device CD in the data memory 24, and starts measuring the energization time in response to the change to the energized state. At this time, the energization measuring unit 11c increases the energization count of the contacts held in the data memory 24 by one. When the contact state changes to the non-energized state, the state of the contact device CD is read into the data memory 24 by the state acquisition unit 11a in the same manner as during energization. Thereby, the energization control unit 11c ends the measurement of the energization time in response to the change to the non-energization state, and rewrites the value of the energization time (split time) of the data memory 24.

  When the energization is performed for the second time or more, the arithmetic processing unit 11 d adds the energization time measured as described above to the accumulated energization time stored in the data memory 24 to obtain the accumulated energization time in the data memory 24. Update.

  The measured energization time (split time), cumulative energization time (cumulative time), and cumulative energization count (cumulative count) are displayed on the energization state display screen 111 by the display control unit 11 as shown in FIG. Thus, the user can check the current energization time, the accumulated energization time, and the accumulated energization time of the contact, that is, the energized device, on the display 28 of the programmable display 2.

  The accumulated energization time measured as described above is reset to 0 by reset. When resetting, when the accumulated time display field 114 on the energization state display screen 111 is touched by the user, the display control unit 11 displays a reset dialog box 121 shown in FIG. 8 according to the processing instruction word WT1.

  The reset dialog box 121 includes a recovery reset button 123, a maintenance reset button 124 and a cancel button 125. The reset button 123 at the time of restoration touches this button when it is desired to newly reset the accumulated time by repair or replacement due to a failure of a component connected to the end of the contact, that is, the energized device. The maintenance reset button 124 is touched when the accumulated time is simply to be reset. A cancel button 125 is touched when the display of the reset dialog box 121 is stopped.

  When the recovery reset button 123 or the maintenance reset button 124 is touched, the display controller 11 resets the accumulated energization time in the data memory 24 in accordance with the processing instruction word WT2. As for the cumulative energization count, if the cumulative count display column 115 on the energization state display screen 111 is touched by the user, a reset dialog box similar to the reset dialog box 121 is displayed (not shown). When the reset button is touched, the reset is performed in the same manner as the cumulative energization time.

  In addition, when the reset button 123 at the time of restoration is touched, the display control unit 11 recognizes that the part set in the part name setting field 103 has been maintained after the reset, and the accumulated energization time so far is measured. Write to the data memory 24 as the lifetime. This operation is also defined as an instruction processing word of the measurement contact definition tag TG, like the processing instruction words WL, WT1, and WT2. In the data memory 24, the measured lifetime of each component is stored for each component name in this way. Also, the cumulative energization count is written in the data memory 24 as the cumulative energization count until the component is measured by the touch of the reset button at the time of restoration.

  The arithmetic processing unit 11d determines the maximum value, the minimum value, and the average value (individual list in FIG. 10) for the same kind of parts to which the same part name is assigned based on the actually measured lifetime stored in the data memory 24 in this way. 132), and the maximum value, the minimum value, and the average value (for display on the tabulated list 133 in FIG. 11) are obtained for the same type of parts to which different part names are assigned. The data is stored in the data memory 24. These values are displayed on the life management screen 131 by the display control unit 11 as shown in FIGS. 10 and 11.

  This life management screen 131 is prepared in advance together with the energization state display screen 111 and is stored in the program memory 23. The life management screen 131 includes a list display tag. This list display tag is made up of processing instructions for displaying the above values at a predetermined location (display coordinate range) on the life management screen 131.

  The display control unit 11 displays the maximum value, the minimum value, and the average value of the measured lifetime and the measured lifetime count stored in the data memory 24 on the lifetime management screen 131 together with the current energization time and the count of energization. The life management screen 131 switches between an individual list 132 for individually displaying these values for each component and a list by count 133 for displaying the maximum value, minimum value, and average value between components having different component names. To do. This switching display is performed by touching either the individual table button 134 or the total table button 135 provided on the life management screen 131.

  Then, when the current energization time and the number of energizations (both measured values) for each contact, that is, each component, exceed the above average value, the arithmetic processing unit 11d performs an operation on the average value of the actually measured values in the data memory 24. Bits representing large and small are rewritten to “1”. In response to the change of the bit, the display control unit 11 changes the display state of the portion where the corresponding actual measurement value is displayed in the individual list 132 and the tabulated list 133 as indicated by the diagonal lines (for example, displays in red). And informing the user that the life of the parts has reached the replacement time.

  As described above, in the control system 1 according to this embodiment, the programmable display 2 has a function of measuring and displaying the contact energization time, the accumulated energization time, and the accumulated energization number. Thus, the user can confirm each actual measured value without creating a measurement program, and the labor required for developing the measurement program can be saved. Moreover, since this programmable display 2 has a function which judges the lifetime of components based on each average value of measured lifetime and the number of times of measured lifetime, and notifies that it has reached the replacement time for components that have reached the lifetime, The life can be determined from the operation results of the parts used in the past, not the life specified for the parts, and a more appropriate part replacement time can be set. Thereby, maintenance can be performed efficiently.

  Further, in the present control system 1, the value measured by each programmable display device 2 may be displayed in the form of the life management screen 131 on the administrator computer 5 connected to the common network 6. Thus, when the system administrator confirms that a certain part shown on the life management screen 131 displayed for a certain programmable display device 2 has reached the replacement time, it confirms the current state of the same part. The life management screen 131 for the other programmable display 2 can be displayed on the administrator computer 2 for confirmation.

  In the present invention, the programmable display has a function of measuring and displaying the energization time and the energization number of the contact so that the current energization time and energization number of the energized device energized by the contact can be confirmed. It can be suitably applied to energized equipment that requires maintenance such as

It is a block diagram which shows the structure of the control system containing the programmable display which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of PLC in the said control system. It is a figure which shows the storage area of the input memory in the said programmable display and said PLC. (A) thru | or (d) is a figure which shows the format of the process instruction word contained in the screen data which is the data of the user screen displayed with the said programmable display. It is a block diagram which shows the structure of the principal part containing the HMI process part which is the center part of the control of the said programmable display. It is a figure which shows the measurement contact definition window which the measurement contact definition part in the host computer of the said control system provides for the definition of a measurement contact. It is a figure which shows the electricity supply state display screen displayed with the said programmable display. It is a figure which shows the reset dialog box displayed with the said programmable display. It is a figure which shows the said electricity supply state display screen of the state by which each measured value was displayed. It is a figure which shows the lifetime management screen (individual list) displayed on the said programmable display. It is a figure which shows the other life management screen (list according to totalization) displayed on the said programmable display.

Explanation of symbols

2 Programmable display (control device)
3 PLC (control device)
4 Host computer (screen creation device)
8 devices (contacts, energized equipment)
11 Display control unit (display control means, cumulative time resetting means, frequency resetting means, cumulative time resetting means, frequency resetting means)
11a State acquisition unit (contact state acquisition means)
11b Energization time measurement unit (energization time measurement means, energization frequency measurement means)
11c arithmetic processing unit (cumulative time calculation means, determination means)
23 program memory 24 data memory (cumulative time storage means, number of times storage means)
27 Touch panel 28 Display 51 Input memory (contact state storage means)
111 energization state display screen SF screen file TG measurement contact definition tag WL processing instruction WT1 processing instruction WT2 processing instruction

Claims (12)

The contact point of the control device that includes contact state storage means for storing the contact state according to a sequence program stored in advance for each contact, and controls energization of the energization device according to the contact state acquired from the contact state storage means In a programmable display device comprising: a contact state acquisition unit that acquires the state of the contact from the state storage unit; and a display control unit that displays the acquired state of the contact on a previously created screen.
It is provided with energization time measuring means for measuring, as the energization time of the contact, until the acquired contact state changes to the energized state and changes to the non-energized state
The said display control means displays the measured electricity supply time on the said screen, The programmable display characterized by the above-mentioned. A cumulative time calculation means for calculating a cumulative value of the measured energization time;
Cumulative time storage means for storing a cumulative value of the energization time;
Cumulative time resetting means for resetting the cumulative value stored in the cumulative time storage means,
The programmable display according to claim 1, wherein the display control unit displays a cumulative value of energization time stored in the cumulative time storage unit on the screen. Time average value calculating means for calculating an average value of a plurality of past accumulated values reset in the accumulated time storage means;
Determination means for determining whether or not the cumulative value of the energization time stored in the cumulative time storage means exceeds the average value,
The programmable display according to claim 2, wherein the display control unit notifies that when the accumulated value of the energization time exceeds the average value. The contact point of the control device that includes contact state storage means for storing the contact state according to a sequence program stored in advance for each contact, and controls energization of the energization device according to the contact state acquired from the contact state storage means In a programmable display device comprising: a contact state acquisition unit that acquires the state of the contact from the state storage unit; and a display control unit that displays the acquired state of the contact on a previously created screen.
Comprising an energization frequency measuring means for counting the energization frequency when the acquired contact state is changed from a non-energized state to an energized state;
The said display control means displays the measured energization frequency on the said screen, The programmable display characterized by the above-mentioned. Number-of-times storage means for storing the measured number of energizations;
A number of times resetting means for resetting the number of energizations stored in the number of times storage means,
The programmable display according to claim 4, wherein the display control unit displays the number of energizations stored in the number storage unit on the screen. Number average value calculating means for calculating an average value of a plurality of past times reset in the number storage means;
Determination means for determining whether or not the number of energizations stored in the number storage means exceeds the average value,
6. The programmable display according to claim 5, wherein the display control means notifies that when the number of energizations exceeds the average value.   A display control program for operating the programmable display according to any one of claims 1 to 6, wherein the display control program causes a computer to function as each means.   A computer-readable recording medium on which the display control program according to claim 7 is recorded.   A screen creation device for creating the screen to be displayed on the programmable display according to any one of claims 1 to 3, wherein the contact information sets information for specifying a contact for measuring an energization time. A screen creation device comprising a specifying means.   It is a screen creation apparatus which produces the said screen for displaying on the programmable display of any one of Claim 4 thru | or 6, Comprising: The contact information which sets the information for specifying the contact which measures energization frequency | count A screen creation device comprising a specifying means.   11. A screen creation program for operating the screen creation apparatus according to claim 9 or 10 for causing a computer to function as each means.   The computer-readable recording medium which recorded the screen creation program of Claim 11.

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