JP2016218724A - Control program editing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a program editing device with which it is possible to lighten burdens on a program creator who creates a control program executable by a programmable controller.SOLUTION: Provided is a program editing device 2 for editing a control program having a chart type program including a plurality of steps provided for each operation unit of a facility 12 and a plurality of transitions indicating a transition condition between the plurality of steps and a ladder program in which the operation contents of steps and the transition condition for transitions are represented by a circuit element including a plurality of contacts and coils, the program editing device comprising: intermediate step extraction means 211 for extracting an intermediate step between a forward operation step for operating the movable part of the facility 12 in one direction and a reverse operation step for operating in a reverse direction; and program element addition means 212 for adding a program element to the control program that restrains the intermediate step from being executed at restart after the facility 12 stopped in the middle after the execution of the intermediate step started.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a control program editing apparatus for editing a control program that can be executed by a programmable controller that controls a device to be controlled.

  Conventionally, a sequential function chart type program (hereinafter referred to as “chart type program”) including a plurality of steps provided for each operation unit of the control target device and a plurality of transitions indicating transition conditions between the plurality of steps; There is known a programmable controller that controls a device to be controlled in accordance with a control program having a concrete operation content of a plurality of steps and a ladder program in which transition conditions of transitions are represented by circuit elements including a plurality of contacts and coils. (For example, refer to Patent Document 1).

  The chart type program and the ladder program are respectively defined as an SFC language and a ladder language in the IEC61131-3 standard. A chart-type program is a format that describes the operation sequence of individual operation units as shown in the flowchart. For example, the flow of operation of the control target device is easier than when the control program is described only by a ladder program. It is possible to grasp.

  On the other hand, since the chart type program is described on the assumption that a plurality of steps representing individual control processes are sequentially executed from the top, during a continuous operation in which a plurality of steps are continuously executed from the upstream side to the downstream side. If some kind of abnormality occurs and stops halfway, the process of the step executed before the halfway stop may be executed again when restarting after the abnormality process. And depending on the operation content of the step, there is a risk of damaging the workpiece and the device to be controlled.

  Therefore, in the programmable controller described in Patent Document 1, the ladder program indicating the transition condition of each transition is configured by combining an intermediate activation flag that is turned on at the time of restart, the activation condition of the step immediately before each transition, and the like. By doing so, it is configured not to re-execute the processing of the executed steps before stopping halfway.

JP 2008-97079 A

  However, creating such a ladder program for each transition places a heavy burden on the program creator. Therefore, the inventors of the present application intensively studied to reduce the burden of such a program creator, and there is a possibility of damaging the workpiece and the device to be controlled if it is executed again at the time of restart after abnormal processing. Paying attention to the fact that some of the steps included in the chart-type program are part of the process, and avoiding the execution of some of the steps at the time of restart, such damage can be avoided. The idea of the present invention has been obtained.

  That is, an object of the present invention is to reduce the burden on a program creator who creates a control program that can be executed by a programmable controller that controls a device to be controlled.

  To achieve the above object, the present invention includes a program editing unit that edits a control program that can be executed by a programmable controller that controls a device to be controlled, and a storage unit that stores a control program edited by the program editing unit. A control program editing device comprising: a plurality of steps provided for each operation unit of the control target device; and a chart program including a plurality of transitions indicating transition conditions between the plurality of steps; A ladder program representing operation contents of the plurality of steps and transition conditions of the plurality of transitions by a circuit element including a plurality of contacts and a coil, and the program editing unit includes: A forward operation step for operating the movable part of the device to be controlled in one direction. Extraction means for extracting an intermediate step between the reverse operation step for operating the movable part in the reverse direction, and execution of the intermediate step in continuous operation in which the plurality of steps are continuously executed from the upstream side to the downstream side Program element addition means for adding a program element for preventing execution of the intermediate step when the continuous operation is stopped halfway later and the chart type program is executed again from the most upstream step. A control program editing apparatus comprising:

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to reduce the burden of the program creator who produces the control program executable with the programmable controller which controls a control object apparatus.

It is a block diagram which shows the control program editing apparatus which concerns on the 1st Embodiment of this invention with a programmable controller, equipment, and an operation panel. It is a block diagram which shows the function structure of a control program editing apparatus. It is a chart type program in the control program memorize | stored in the memory | storage part of the control program editing apparatus. It is explanatory drawing which shows an example of a dialog box. 4 is an example of a chart type program in which a bypass circuit automatically generated by a program element addition unit is added to the chart type program shown in FIG. (A)-(c) shows an example of the ladder program produced | generated by the program element addition means. (A) And (b) shows an example of the ladder program produced | generated by the program element addition means based on the 2nd Embodiment of this invention.

[First Embodiment]
A first embodiment of the present invention will be described below with reference to FIGS. The following embodiments are shown as preferred specific examples for carrying out the present invention, and there are portions that specifically illustrate various technical matters that are technically preferable. The technical scope of the present invention is not limited to this specific embodiment.

  FIG. 1 shows a control program editing device 2 as a control program editing device according to a first embodiment of the present invention, an operation panel including a programmable controller 10, equipment 12 as a control target device, and a monitor device 3. FIG.

  In the present embodiment, the control program editing device 2 includes a main unit 20 configured with an MPU (Micro-processing unit) and its peripheral circuits, a display 201 as a display unit, and a keyboard 202 as a character input unit. , And a portable computer (notebook personal computer) having a touch pad 203 as a pointing device. However, the configuration of the control program editing apparatus 2 is not limited to this, and may be configured by combining a stationary computer (desktop personal computer) with peripheral devices such as a display, a keyboard, and a pointing device.

  The control program editing device 2 has a function of editing a control program executed by the programmable controller 10. The control program edited by the control program editing device 2 is transferred to the programmable controller 10 via the communication cable 141. The control program includes a chart program written in the SFC language and a ladder program in a ladder language corresponding to each step and transition described later of the chart program. These SFC language and ladder language are those defined in the IEC61131-3 standard.

  The programmable controller 10 includes a power supply module 101, a CPU module 102, a communication module 103, an output module 104, an input module 105, and a base 100 on which these modules are mounted. The power supply module 101 supplies power to the CPU module 102 and the like via the base 100. The communication module 103 communicates with the monitor device 3 of the operation panel 13.

  The output module 104 has a plurality of output contacts connected to a plurality of actuators 121 provided in the facility 12. The plurality of actuators 121 include, for example, solenoids, motors, or electromagnetic switching valves that control hydraulic pressure. The input module 105 has a plurality of input contacts that are turned on / off by input signals from a plurality of sensors 122 provided in the facility 12. The plurality of sensors 122 include, for example, proximity sensors, photoelectric sensors, limit switches, or the like.

  The CPU module 102 executes the control program edited by the control program editing device 2 and turns on / off each output contact of the output module 104 in accordance with the state of each input contact of the input module 105, etc. To control. In the present embodiment, the equipment 12 is a machine tool, and a predetermined part is assembled to a loaded work.

  The operation panel 13 includes a monitor device 3, an automatic / individual selection switch 131, an operation preparation switch 132, a start switch 133, an execution switch 134, and an emergency stop switch 135. The automatic / each individual selection switch 131 is a switch for switching between an automatic operation mode in which continuous operation is performed according to the control program edited by the control program editing device 2 and each individual operation mode in which the actuator 121 of the equipment 12 performs an individual operation. . The operation preparation switch 132 is a switch for enabling the actuator 121 of the facility 12 to operate. The start switch 133 is a switch for instructing start of automatic operation. The execution switch 134 is a switch for instructing execution of an individual operation in each individual operation mode. The emergency stop switch 135 is a switch for immediately stopping the operation of the facility 12. Each of these switches 131 to 135 is connected to the input module 105 of the programmable controller 10.

  The display unit 31 of the monitor device 3 displays an operation state display screen showing the execution status of each step of the chart type program by the programmable controller 10 in the automatic operation mode. The display 31 of the monitor device 3 displays a plurality of operation buttons indicating individual operations that can be performed by the facility 12 in each individual operation mode. FIG. 1 shows a state in which an operation state display screen is displayed on the monitor device 3.

  The display device 31 of the monitor device 3 is a touch panel, and in each individual operation mode, an operator such as a maintenance person in charge of the equipment 12 presses a button displayed on the display device 31 so that an individual operation corresponding to the button can be performed. 12 can be performed. Each individual operation is performed, for example, at the time of recovery work when any abnormality occurs during continuous operation of the facility 12 in the automatic operation mode.

  The monitor device 3 is connected to the communication module 103 of the programmable controller 10 via the communication cable 142, the on / off state of each output contact of the output module 104, the on / off state of each input contact of the input module 105, and the CPU module 102. The on / off states of various flags stored in can be read at any time. The monitor device 3 can also read a control program stored in the CPU module 102 from the programmable controller 10. And the monitor apparatus 3 displays the execution condition of the control program by the CPU module 102 of the programmable controller 10 at any time on the display 31 in the automatic operation mode.

  The chart-type program edited by the control program editing device 2 is described including a plurality of steps provided for each operation unit of the facility 12 and transitions indicating transition conditions between the plurality of steps. If the transition condition of the transition is satisfied, the chart type program can be executed to the next step. The chart type program shows the execution order (flow) of a plurality of steps.

  At least some of the plurality of steps included in the chart-type program include a forward operation step for operating the movable part of the facility 12 in one direction and a reverse operation step for operating the movable part in the reverse direction. Make. When viewed from the forward operation step, the reverse operation step is the opposite operation step. Further, when viewed from the reverse operation step, the forward operation step is the opposite operation step. Usually, a chart type program includes a plurality of step pairs.

  A ladder program is assigned to each step and transition. In the ladder program assigned to the step, the specific operation contents in the step are represented by circuit elements including a plurality of contacts and coils. In the ladder program assigned to the transition, a transition condition between steps is represented by a circuit element including one or a plurality of contacts and a coil.

  Coils and relays can be considered as components of one relay. That is, the contact of this relay is turned on or off by energizing or de-energizing the relay coil. The contacts include an a-contact that is turned on when the coil is energized and turned off when the coil is not energized, and a b-contact that is turned off when the coil is energized and turned on when the coil is not energized. Further, for example, the relay is turned on / off by the processing of the actual relay built in the output module 104, the virtual internal relay and keep relay used for describing the ladder program, and the CPU module 102 itself. There is a step start relay.

  Each relay is assigned an address for identifying the relay. In the present embodiment, addresses starting with “Y” (for example, “Y001”, “Y002”, etc.) are assigned to real relays, and addresses starting with “M” (for example, “M001”, “Y”) are assigned to internal relays. M002 "). Further, an address starting with “K” (for example, “K001”, “K002”, etc.) is assigned to the keep relay. The keep relay is a relay in which the ON / OFF state is stored even when the power source of the programmable controller 10 is cut off, and has a set coil and a reset coil as coils. When the set coil is energized, the “a” contact of the keep relay is turned on. When the reset coil is energized, the “a” contact of the keep relay is turned off. The b contact is in an on / off state opposite to the a contact.

  An address starting with “EK” (for example, “EK001”, “EK002”, etc.) is assigned to the step activation relay. This step activation relay is for causing the ladder program corresponding to each step to be executed. When the chart module program is executed, when the CPU module 102 starts the processing of the next step after passing the transition, the CPU module 102 temporarily turns on the contact of the step activation relay corresponding to the step.

  In the ladder program, the coil is an output element, and the condition setting for whether the coil is energized (activated) or not energized (inactivated) is defined by a combination of one or more contacts Is done. For example, when the condition for energizing the coil of the actual relay assigned Y001 as the address is satisfied, the contact (a contact) of the actual relay of Y001 is turned on and connected to this contact. The actuator 121 of the equipment 12 operates.

  The monitor device 3 displays the step being executed by the CPU module 102 on the display 31 together with the steps before and after the step. At this time, the monitor device 3 displays the step being executed by the CPU module 102 so as to be distinguishable from other steps, for example, by changing the display color. In the example illustrated in FIG. 1, steps being executed by the CPU module 102 are illustrated by hatching.

  FIG. 2 is a block diagram showing a functional configuration of the control program editing device 2. The control program editing apparatus 2 includes a main body unit 20 having a program editing unit 21 for editing a control program that can be executed by the programmable controller 10, a display 201 that displays a control program being edited, a keyboard 202, and a touch pad 203. Have. The main body unit 20 further includes a storage unit 22 that stores a control program edited by the program editing unit 21 and a communication unit 23 that communicates with the programmable controller 10. The storage unit 22 is composed of, for example, a hard disk or a semiconductor storage element.

  Instead of the touch pad 203, for example, a mouse or a trackball can be used as a pointing device. Further, when the display 201 is configured by combining a display device such as a liquid crystal panel and a position input device such as a touch pad, the position input device can be used as a pointing device and further displayed on the display device. By selecting a character by a touch operation on the position input device, it is possible to input a character instead of the keyboard 202.

  The program editing unit 21 operates as an intermediate step extracting unit 211 and a program element adding unit 212 when the MPU executes a program installed in the control program editing apparatus 2 in advance.

  The intermediate step extracting means 211 is between a forward operation step for operating the movable part of the equipment 12 in one direction and a reverse operation step for operating the movable part in the reverse direction among a plurality of steps included in the chart type program. Extract intermediate steps.

  Further, the program element adding means 212 stops the continuous operation halfway after the start of the intermediate step in the continuous operation in which a plurality of steps are continuously executed from the upstream side to the downstream side, and the chart type program is moved from the most upstream step. A program element for preventing the execution of the intermediate step when it is executed again is added to the control program.

  More detailed processing contents of the intermediate step extraction unit 211 and the program element addition unit 212 will be described later.

  FIG. 3 shows a specific example of a chart type program in the control program stored in the storage unit 22 of the control program editing device 2. In accordance with the IEC 61131-3 standard, this chart type program is described by alternately arranging a plurality of steps representing individual control processing and transitions representing transition conditions between steps. “ST000”, which is the first step of the chart type program, is a step indicating an automatic cycle in which the equipment 12 is continuously operated in the automatic operation mode. The programmable controller 10 sequentially executes the control processing of each step from “ST000”, which is the most upstream of the chart type program, toward the downstream side at the start of automatic operation.

  The chart type program shown in FIG. 3 includes each of a front / rear unit forward operation (ST001), a vertical unit upward operation (ST002), an assembly cycle (ST003), a vertical unit downward operation (ST004), and a front / rear unit backward operation (ST005). The step control processing is sequentially executed. Here, ST000 to ST005 are step numbers of the respective steps.

  In this chart type program, the front / rear unit forward operation step (ST001) is a forward operation step for moving the front / rear unit, which is a movable part of the equipment 12, in one direction (forward direction), and the front / rear unit backward operation step (ST005). ) Is a reverse operation step for operating the front and rear units in the reverse direction (reverse direction). In addition, the vertical unit raising operation step (ST002) is a forward operation step for moving the vertical unit, which is a movable part of the equipment 12, in one direction (upward direction), and the vertical unit lowering operation step (ST004) This is a reverse operation step for operating the unit in the reverse direction (downward direction).

  The front / rear unit forward operation step (ST001) and the front / rear unit backward operation step (ST005) form one step pair. Similarly, the step of the vertical unit raising operation (ST002) and the step of the vertical unit lowering operation (ST004) form one step pair. That is, this chart type program includes two step pairs.

  Opposite steps for each step are set by the program creator when creating the chart type program. More specifically, when the program creator creates a chart program, the program creator performs an input operation on a dialog box displayed on the display 201 of the control program editing apparatus 2.

  FIG. 4 is an explanatory diagram showing an example of this dialog box. FIG. 4 shows, as an example, a dialog box 24 for inputting an opposite operation step related to the step (ST001) of the forward / backward unit forward operation.

  The dialog box 24 is provided with a comment column 241 for inputting a comment indicating the operation content of the step (ST001) and a pull-down menu column 242 for selecting an opposite operation. The program creator inputs a comment indicating the operation content of the step in the comment column 241 and selects the opposite operation step from the pull-down menu in the pull-down menu column 242. Thereafter, when the program creator clicks the OK button 243 in the dialog box 3, the contents input or selected in the comment field 241 and the pull-down menu field 242 of the dialog box 24 are confirmed, and the setting contents are stored in the storage unit 22. The When there is no opposite operation step, an operation for selecting the opposite operation step from the pull-down menu column 242 is not necessary.

  By the way, the equipment 12 may stop halfway due to various factors during the automatic operation. For example, after the assembly of the parts to the workpiece in the assembly cycle (ST003) is completed, when the step of the vertical unit lowering operation (ST004) does not complete the operation because the vertical unit interferes with the workpiece, the transition “TR004” is performed. ”Is not satisfied, and the facility 12 stops halfway. In such a case, it is confirmed at which step the operator has stopped halfway according to the display content of the monitor device 3, the automatic / each individual selection switch 131 is switched to each individual operation mode, and abnormality processing is performed by each individual operation. . Thereafter, the operator further switches the automatic / each individual selection switch 131 to the automatic operation mode and restarts (restarts) the automatic operation of the equipment 12.

  At this time, the programmable controller 10 resumes execution from the most upstream step of the chart type program. However, since the workpiece has already been assembled, it is necessary to prevent the assembly cycle (ST003) from being executed.

  In the present embodiment, the program element adding means 212 performs continuous operation after the start of execution of the bypass circuit that connects the upstream side and the downstream side in the chart program of the intermediate step extracted by the intermediate step extracting means 211. A transition for enabling the bypass circuit is added to the chart type program when the chart type program is executed again from the most upstream step after stopping halfway. These bypass circuits and transitions are one form of program elements added by the program element adding means 212.

  Here, a specific example of processing contents when the intermediate step extracting unit 211 extracts the intermediate step will be described. The intermediate step extraction means 211 extracts an intermediate step from each step of the chart type program by the following procedures 1 to 3.

  Procedure 1: Sequentially from the top step of the chart-type program, it is determined whether or not an opposite operation step is set, and a forward operation step and a reverse operation step forming a step pair are extracted.

  Procedure 2: A step between the forward operation step and the reverse operation step extracted in Procedure 1 is extracted as a candidate step. When there are a plurality of step pairs, a step between the forward operation step and the reverse operation step of each step pair is extracted as a candidate step.

  Procedure 3: When there are a plurality of step pairs in the chart type program, the candidate step extracted in common for all the step pairs is set as an intermediate step. When only one step pair exists in the chart type program, the candidate step extracted for the step pair is set as an intermediate step.

  In the chart type program shown in FIG. 3, the step of the front / rear unit forward operation (ST001) and the step of the front / rear unit backward operation (ST005) form a step pair. To ST004) are extracted as candidate steps. Further, in the chart type program shown in FIG. 3, the step of the vertical unit raising operation (ST002) and the step of the vertical unit lowering operation (ST004) form a step pair. (ST003) is extracted as a candidate step. Then, according to the procedure 3, the assembly cycle (ST003) included in common with each extracted candidate step is extracted as an intermediate step.

  The program element adding means 212 stops the continuous operation of the facility 12 after the execution of the intermediate step extracted in this way, and when executing the chart program again from the most upstream step, A program element for preventing execution is added to the control program.

  FIG. 5 is an example of a chart type program in which the bypass circuit 4 automatically generated by the program element addition unit 212 is added to the chart type program shown in FIG. In FIG. 5, the bypass circuit 4 added by the program element adding unit 212 is surrounded by a broken line.

  The bypass circuit 4 includes a dummy step 40 generated one upstream of the intermediate step “ST003”, and a first transition (TR011) generated between the dummy step 40 and the step “ST003”. ) 41, a second transition (TR 012) 42 generated in parallel with the first transition 41, and a bypass path 43 indicating a jump destination when passing through the second transition 42.

  The bypass path 43 bypasses step “ST003” and connects the second transition 42 to step “ST004”, which is one step downstream of step “ST003” that is an intermediate step. That is, the jump destination of the bypass path 43 is immediately before the step downstream one of the steps extracted as the intermediate step. When the transition condition of the second transition 42 is satisfied, the transition “TR003 of the intermediate step is satisfied. "ST004" and subsequent steps are executed regardless of the success or failure of the assembly that is the transition condition. When a plurality of intermediate steps are extracted, the jump path on the bypass path 43 is immediately before one of the most downstream steps.

  The program element adding means 212 adds the bypass circuit 4 to the chart type program and adds a circuit to the ladder program. FIGS. 6A to 6C show an example of a ladder program generated by the program element adding unit 212, where FIG. 6A shows an intermediate step “ST003” and FIG. 6B shows a first transition 41. (C) shows ladder programs corresponding to the second transitions 42, respectively.

  The ladder program 50 corresponding to the step “ST003” is a first circuit in which the keep relay “K01” is set to the on state when “EK03” which is the contact of the step activation relay of the step “ST003” is turned on. 501 and the second circuit 502 for resetting the keep relay “K01” to the OFF state.

  The first circuit 501 is generated as a ladder program in which the keep relay “K01” is set when the contact is in the ON state only according to the ON / OFF state of the contact of the step activation relay “EK03”. In addition to this, the program creator can add contacts such as various interlock signals as conditions for setting the keep relay “K01” as necessary.

  As the second circuit 502, a circuit is generated in which the keep relay “K01” is reset by the b contact (reversing contact) of “V04” that is always on contact, but the b contact of “V04” is always off. Therefore, the keep relay “K01” is not reset with this circuit. Therefore, the program creator adds a condition setting for resetting the keep relay “K01” to the second circuit 502 in accordance with the configuration of the facility 12. Specifically, for example, a contact indicating that each movable part of the facility 12 is in the original position is added instead of the b contact of “V04”.

  This keep relay “K01” is used as a transition condition in the first and second transitions 41 and 42. Specifically, a ladder program 51 configured to satisfy the transition condition when the keep relay “K01” is reset is provided corresponding to the first transition 41. Further, a ladder program 52 configured to satisfy the transition condition when the keep relay “K01” is set is provided corresponding to the second transition 42.

  The relay “TR011” in the ladder program 51 assigned to the first transition 41 indicates the transition condition of the first transition 41. If the relay “TR011” is in the ON state, the first transition 41 can pass through. It becomes a state. The relay “TR012” in the ladder program 52 assigned to the second transition 42 indicates the transition condition of the second transition 42. If the relay “TR012” is in the ON state, the second transition 42 is It will be able to pass.

  When the automatic operation of the equipment 12 is started from step “ST000”, which is the first step of the chart type program, instead of restarting after stopping halfway, the keep relay “K01” is in the off state, so the first transition The transition condition of 41 is satisfied, and the control process of step “ST003” is executed after step “ST002”.

  On the other hand, at the time of restart when the assembly process to the workpiece by the control process of step “ST003” is started and then stopped, the keep set by the first circuit 501 is executed when the control process of step “ST003” is executed. Since the ON state of the relay “K01” is maintained, the transition condition of the first transition 41 is not satisfied, and the transition condition of the second transition 42 is satisfied. As a result, the bypass path 43 is enabled and the execution of the control process of the assembly cycle (ST003) is omitted. Thereby, it becomes possible to avoid the damage of a workpiece | work and the installation 12. FIG.

(Effects of the first embodiment)
According to the first embodiment described above, the following effects can be obtained.

(1) An intermediate step to be processed into a workpiece is extracted by the intermediate step extracting unit 211, and a program element for preventing the execution of the intermediate step process at the time of restart after a halfway stop by the program element adding unit 212 Is added. For this reason, it becomes possible to reduce the burden of the program creator.

(2) Since the bypass path and transition generated by the program element adding means 212 are added to the chart-type program as program elements, the third party other than the program creator (such as a maintenance person of the equipment 12) can also The contents can be easily grasped.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. The control program editing apparatus 2 according to the present embodiment is configured in the same manner as that described with reference to FIG. 2 for the first embodiment, but the content of the processing by the program element adding means 212 is the first. This is different from the embodiment. Hereinafter, the processing contents of the program element adding means 212 will be described in detail by taking as an example a case where a program element for preventing execution of intermediate steps is added to the control program including the chart type program shown in FIG. .

  The program element adding unit 212 according to the present embodiment corresponds to the intermediate step extracted by the intermediate step extracting unit 211 as a program element for preventing execution of the intermediate step process from being restarted after being stopped halfway. A circuit element for preventing the execution of this intermediate step is added to the ladder program of the transition.

  FIGS. 7A and 7B show an example of a ladder program generated by the program element addition unit 212 according to this embodiment. FIG. 7A is a ladder program of step “ST003”, which is an intermediate step, and FIG. 7B is a ladder program of transition “TR003” corresponding to step “ST003”.

  The ladder program 60 in step “ST003” is the same as that described in the first embodiment with reference to FIG. 6, and “EK03”, which is the contact of the step start relay in step “ST003”, is turned on. Thus, the first circuit 601 in which the keep relay “K01” is set to the on state and the second circuit 602 for resetting the keep relay “K01” to the off state are configured. The program creator appropriately adds contacts such as various interlock signals to the first circuit 601 and the second circuit 602.

  The relay “TR003” in the ladder program 61 of the transition “TR003” illustrated in FIG. 7B is a relay indicating the transition condition of the transition “TR003”. If the relay “TR003” is in the ON state, the transition “TR003” is displayed. "Is ready to pass. In addition, if the relay “TR003” is in the ON state before starting the execution of the step “ST003”, after passing the transition “TR002” during the continuous operation, the control process of the step “ST003” is not executed. Pass the transition “TR003”.

  In the ladder program 61 shown in FIG. 7B, various contacts according to the configuration of the equipment 12 are provided by the program creator in an area 610 surrounded by a dotted line. The program element adding means 212 adds a contact (a contact) of the keep relay “K01” which is turned on when the keep relay “K01” is set in parallel with the area 610. Thereby, the control process of step “ST003” is not executed at the time of restart after an intermediate stop.

  If such a contact (a contact) of the keep relay “K01” is also added to the ladder program of the transition (TR001 to TR002) of the steps (ST001 to ST002) upstream of the intermediate step, after the stop Execution of the control processing of steps (ST001 to ST002) can be omitted when restarting.

  According to the present embodiment, the program element adding unit 212 adds a program element for preventing the execution of the intermediate step process at the time of restart after a halfway stop, as in the first embodiment. It is possible to reduce the burden on the program creator.

DESCRIPTION OF SYMBOLS 10 ... Programmable controller, 100 ... Base, 101 ... Power supply module, 102 ... CPU module, 103 ... Communication module, 104 ... Output module, 105 ... Input module, 12 ... Equipment (control object apparatus), 121 ... Actuator, 122 ... Sensor DESCRIPTION OF SYMBOLS 13 ... Operation panel 130 ... Monitor device 130a ... Display unit 131 ... Individual selection switch 132 ... Operation preparation switch 133 ... Start switch 134 ... Execution switch 135 ... Emergency stop switch 141, 142 ... Communication cable DESCRIPTION OF SYMBOLS 2 ... Control program edit apparatus, 20 ... Main-body part, 201 ... Display, 202 ... Keyboard, 203 ... Touchpad, 21 ... Program edit part, 211 ... Intermediate step extraction means, 212 ... Program element addition means, 22 ... Memory | storage part , 23 ... communication unit, 2 DESCRIPTION OF SYMBOLS 1 ... Comment field, 242 ... Pull-down menu field, 243 ... OK button, 3 ... Monitor apparatus, 31 ... Display device, 4 ... Bypass circuit, 40 ... Dummy step, 41 ... 1st transition, 42 ... 2nd transition, 43 ... Bypass path, 50, 51, 52, 60, 61 ... Ladder program, 501, 601 ... First circuit, 502, 602 ... Second circuit, 610 ... Area

Claims (3)

A program editing unit that edits a control program that can be executed by a programmable controller that controls a device to be controlled, and a control program editing device that includes a storage unit that stores a control program edited by the program editing unit,
The control program includes a plurality of steps provided for each operation unit of the control target device, a chart program including a plurality of transitions indicating transition conditions between the plurality of steps, operation contents of the plurality of steps, and A ladder program that represents the transition conditions of the plurality of transitions by circuit elements including a plurality of contacts and coils,
The program editing unit
An extracting means for extracting an intermediate step between a forward operation step for operating the movable part of the control target device in one direction and a reverse operation step for operating the movable part in the reverse direction among the plurality of steps;
When the continuous operation is stopped halfway after the execution of the intermediate step in the continuous operation in which the plurality of steps are continuously executed from the upstream side to the downstream side, and the chart program is executed again from the most upstream step. Program element addition means for adding a program element for preventing execution of the intermediate step to the control program,
Control program editing device. The program element adding means includes, as the program element, a bypass circuit that connects an upstream side and a downstream side in the chart-type program of the intermediate step, and the continuous operation stops halfway after the execution of the intermediate step, and the chart A transition for enabling the bypass circuit when the formula program is executed again from the most upstream step is added to the chart program;
The control program editing apparatus according to claim 1. The program element adding means adds, as the program element, a circuit element for preventing the execution of the intermediate step in the ladder program of the transition corresponding to the intermediate step.
The control program editing apparatus according to claim 1.

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