JP6500594B2 - Control program editor - Google Patents

Description

  The present invention relates to a control program editing apparatus for editing a control program executable by a programmable controller that controls a control target device.

  Conventionally, a sequential function chart program (hereinafter referred to as a "chart program") including a plurality of steps provided for each operation unit of a control target device and a plurality of transitions indicating transition conditions between the plurality of steps; A programmable controller is known which controls a control target device according to a control program having specific operation contents of a plurality of steps and a ladder program representing a transition condition of a transition by a plurality of contacts and a circuit element including a coil. (See, for example, Patent Document 1).

  The chart type program and the ladder program are defined as SFC language and ladder language in the IEC 61131-3 standard, respectively. The chart type program is a format that describes the operation order of individual operation units as a flow chart, and for example, facilitates the flow of operation of the control target device compared to the case where the control program is described only by the ladder program. It is possible to grasp.

  On the other hand, since the chart type program is described on the premise that a plurality of steps representing individual control processes are sequentially executed from the top, the continuous operation in which the plurality of steps are sequentially executed from the upstream side to the downstream side is performed. When some abnormality occurs and the process is suspended, the process of the step executed before the process may be performed again at the restart after the abnormal process. Then, depending on the operation contents of the step, there is a possibility that the workpiece or the control target device may be damaged.

  Therefore, in the programmable controller described in Patent Document 1, a ladder program indicating transition conditions of each transition is configured by combining an intermediate activation flag that is turned on at restart and activation conditions of steps immediately before each transition and the like. By doing this, it is configured not to re-execute the processing of the step that has already been executed 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 diligently study to reduce the burden of such a program creator, and if it is executed again at restart after abnormal processing, there is a possibility that the work or the device to be controlled may be damaged, Such damage can be avoided by noting that the processing of this partial step is executed at the time of restarting, noting that this is a partial step among the plurality of steps included in the chart program. It came to make the present invention on the idea that

  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 control target device.

  In order to achieve the above object, the present invention provides a program editing unit that edits a control program executable by a programmable controller that controls a control target device, and a storage unit that stores a control program edited by the program editing unit. A control program editing apparatus, wherein the control program includes: a plurality of steps provided for each operation unit of the control target device; and a chart type program including a plurality of transitions indicating transition conditions between the plurality of steps. And 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 selects one of the plurality of steps Forward operation step of 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 start of 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 adding means for adding a program element to the control program so as not to execute the intermediate step when the continuous operation is stopped halfway and the charting program is re-executed from the most upstream step later An editing apparatus of a control program is provided.

  According to the present invention, it is possible to reduce the burden on a program creator who creates a control program that can be executed by a programmable controller that controls a control target device.

BRIEF DESCRIPTION OF THE DRAWINGS 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, an installation, and a control 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 an explanatory view showing an example of a dialog box. It is an example of the chart-type program which added the bypass circuit automatically produced | generated by the program element addition means to the chart-type program shown in FIG. (A)-(c) show 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 which concerns on the 2nd Embodiment of this invention.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 6. Note that the embodiments shown below are shown as preferable specific examples for carrying out the present invention, and there are portions that specifically exemplify 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, a control panel provided with a programmable controller 10, equipment 12 as a control target device, and a monitoring device 3 It is a block diagram shown with 13. FIG.

  In the present embodiment, the control program editing device 2 includes a main unit 20 configured to include an MPU (Micro-processing unit) and peripheral circuits thereof, a display 201 as a display unit, and a keyboard 202 as a character input unit. And a portable computer (notebook computer) having a touch pad 203 as a pointing device. However, the configuration of the control program editing device 2 is not limited to this, and may be configured by combining, for example, 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 in the control program editing device 2 is transferred to the programmable controller 10 by the communication cable 141. The control program includes a chart type program described in the SFC language, and a ladder program in ladder language corresponding to each step and transition of the chart type program described later. These SFC language and ladder language are those defined in the IEC 61131-3 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 through 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 are, 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 are, 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 according to the state of each input contact of the input module 105, etc. Control. In the present embodiment, the equipment 12 is a machine tool, and it is assumed that a predetermined part is assembled to the carried-in work.

  The control panel 13 has a monitor device 3, an automatic / each individual selection switch 131, an operation preparation switch 132, an activation 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 an individual operation mode in which the actuator 121 of the facility 12 performs individual operation. . The operation preparation switch 132 is a switch for enabling the actuator 121 of the facility 12. The start switch 133 is a switch for instructing start of the 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 31 of the monitor device 3 displays an operating state display screen that shows the execution status of each step of the chart-type program by the programmable controller 10 in the automatic operation mode. In addition, on the display 31 of the monitor device 3, a plurality of operation buttons indicating individual operations which can be performed by the facility 12 in each individual operation mode are displayed. FIG. 1 shows a state in which the driving state display screen is displayed on the monitor device 3.

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

  The monitor device 3 is connected to the communication module 103 of the programmable controller 10 by the communication cable 142, and 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. It is possible to read out the on / off states of various flags stored in the memory at any time. The monitor device 3 can also read the control program stored in the CPU module 102 from the programmable controller 10. Then, in the automatic operation mode, the monitor device 3 displays the execution status of the control program by the CPU module 102 of the programmable controller 10 on the display 31 as needed.

  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 a transition indicating a transition condition between the plurality of steps. If the transition transition conditions are satisfied, it is possible to advance the execution of the chart expression program to the next step. The charting program shows the execution order (flow) of a plurality of steps.

  At least some of the steps included in the charting program are a pair of steps consisting of a forward operation step of operating the movable part of the equipment 12 in one direction and a reverse operation step of operating the movable part in the reverse direction. I When viewed from the forward operation step, the reverse operation step is the opposite operation step. Also, when viewed from the reverse operation step, the forward operation step is the opposite operation step. Typically, charted programs include multiple step pairs.

  A ladder program is assigned to each step and transition. The ladder program assigned to the step represents the specific operation content in the step by a circuit element including a plurality of contacts and a coil. Also, the ladder program assigned to the transition represents transition conditions between steps by circuit elements including one or more 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 coil of the relay. The contacts include an a contact which is turned on when the coil is energized and is turned off when the coil is not energized, and a b contact which is turned off when the coil is energized and is turned on when the coil is not energized. Also, in the relays, for example, contacts are turned on / off by processing of an actual relay built in the output module 104, virtual internal relays and keep relays used for describing a ladder program, and the CPU module 102 itself. There is a step start relay.

  Each relay is assigned an address for identifying each relay. In the present embodiment, the real relays are assigned addresses starting with "Y" (for example, "Y001", "Y002", etc.), and the internal relays are addresses starting with "M" (for example, "M001", M002 etc.) are assigned. Also, addresses (eg, "K001", "K002", etc.) beginning with "K" are assigned to the keep relay. The keep relay is a relay that stores its on / off state even when the power of the programmable controller 10 is shut 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, and when the reset coil is energized, the a contact of the keep relay is turned off. The b-contact is in the on / off state opposite to the a-contact.

  The step activation relay is assigned an address beginning with "EK" (for example, "EK001", "EK002", etc.). The step activation relay is for executing the execution of the ladder program corresponding to each step. At the time of execution of the chart program, when the CPU module 102 passes through the transition and starts to execute the processing of the next step, the contact of the step activation relay corresponding to that step is temporarily turned on.

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

  The monitor device 3 displays the steps being executed by the CPU module 102 on the display 31 together with the preceding and subsequent steps. At this time, the monitor device 3 displays the step being executed by the CPU module 102 in a distinguishable manner 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 device 2 includes a main unit 20 having a program editing unit 21 for editing a control program executable by the programmable controller 10, a display 201 for displaying the 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 the 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 formed of, for example, a hard disk or a semiconductor storage element.

  Instead of the touch pad 203, for example, a mouse or a track ball 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, for example, this position input device can be used as a pointing device and is further displayed on the display device. It is also possible to perform character input instead of the keyboard 202 by selecting characters by touch operation on the position input device.

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

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

  In addition, the program element adding unit 212 stops the continuous operation halfway after the start of the execution of the intermediate step in the continuous operation in which the plurality of steps are continuously performed from the upstream side to the downstream side, and the chart type program is started from the most upstream step. A program element is added to the control program so as not to execute the intermediate step when executing again.

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

  The chart type program shown in FIG. 3 is each of forward and backward unit forward movement (ST001), upper and lower unit uplift movement (ST002), assembly cycle (ST003), upper and lower unit down movement (ST004), and forward and backward unit backward movement (ST005). The control process of the steps is configured to be sequentially executed. Here, ST000 to ST005 are step numbers of each step.

  In this chart type program, the step (ST001) of the front and back unit advancing operation is a forward operation step of operating the front and back unit which is the movable part of the equipment 12 in one direction (forward direction). ) Is a reverse operation step for moving the front and rear units in the reverse direction (backward direction). The step (ST002) of the upper and lower unit raising operation is a forward operation step of operating the upper and lower units which are the movable part of the equipment 12 in one direction (raising direction). The step (ST004) of the upper and lower unit lowering operation is This is a reverse operation step of operating the unit in the reverse direction (downward direction).

  The step (ST001) of the front-rear unit advancing operation and the step (ST005) of the front-rear unit backward operation form one step pair. Similarly, the step of the upper and lower unit raising operation (ST002) and the step of the upper and lower unit lowering operation (ST004) constitute one step pair. That is, the charting program includes two step pairs.

  The opposite step to each step is set by the program creator when creating the charting program. More specifically, when the program creator creates a chart-type program, the program creator performs an input operation on a dialog box displayed on the display 201 of the control program editing device 2 to set.

  FIG. 4 is an explanatory view 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 front / rear unit advancing 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 the opposite operation. The program creator inputs a comment indicating the operation content of the step into the comment column 241, and selects the opposite operation step from the pull-down menu of the pull-down menu column 242. Thereafter, when the program creator clicks the OK button 243 of the dialog box 3, the contents input or selected in the comment column 241 and the pull-down menu column 242 of the dialog box 24 are determined, and the setting contents are stored in the storage unit 22. Ru. When there is no opposite operation step, an operation to select the opposite operation step from the pull-down menu column 242 is unnecessary.

  By the way, the installation 12 may be stopped halfway due to various factors during its automatic operation. For example, after the assembly of parts to the work in the assembly cycle (ST 003) is completed, the upper and lower units interfere with the work, etc., and so on. The transition condition of “is not satisfied, and the facility 12 stops halfway. In such a case, it is confirmed in which step the worker is stopping halfway according to the display content of the monitor device 3, and the automatic / each-piece selection switch 131 is switched to each-piece operation mode, and the abnormality processing is performed by each piece of operation. . Thereafter, the worker switches the automatic / each-piece selection switch 131 to the automatic operation mode to restart (restart) the automatic operation of the facility 12.

  At this time, the programmable controller 10 resumes execution from the most upstream step of the chart program. However, since the workpiece is already in a state where the assembly of parts has been completed, it is necessary to prevent the execution of the assembly cycle (ST003).

  In the present embodiment, the program element addition means 212 includes a bypass circuit connecting the upstream side and the downstream side in the chart program of the intermediate step extracted by the intermediate step extraction means 211, and continuous operation after the start of execution of the intermediate step. A transition for enabling the bypass circuit is added to the chart-type program when stopping halfway and executing the chart-type program again from the most upstream step. These bypass circuits and transitions are an aspect of the program element added by the program element adding means 212.

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

  Procedure 1: From the top step of the chart type program, it is judged sequentially whether or not the opposite operation step is set, and the forward operation step and the reverse operation step forming the step pair are extracted.

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

  Procedure 3: When a plurality of step pairs exist in the chart program, candidate steps extracted in common for all the step pairs are regarded as intermediate steps. If there is only one step pair in the charting program, let the candidate step extracted for that step pair be an intermediate step.

  In the chart type program shown in FIG. 3, since the step (ST001) of the front-rear unit advancing operation and the step (ST005) of the front-rear unit retracting operation form a step pair, the step 2 between these two steps (ST002) ~ ST004) are extracted as candidate steps. Further, in the chart type program shown in FIG. 3, since the step (ST002) of the upper and lower unit raising operation and the step (ST004) of the upper and lower unit lowering operation form a step pair, step 2 between these two steps (ST003) is extracted as a candidate step. Then, according to procedure 3, the assembly cycle (ST003) included in common to the extracted candidate steps is extracted as an intermediate step.

  The program element adding means 212 stops the continuous operation of the equipment 12 halfway after starting the execution of the intermediate step extracted in this way, and executes again the chart type program from the most upstream step. Add program elements to the control program to prevent execution.

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

  The bypass circuit 4 includes a dummy step 40 generated on the upstream side of one of the intermediate steps “ST003” and a first transition (TR011) generated between the dummy step 40 and the step “ST003”. 41), a second transition (TR012) 42 generated in parallel with the first transition 41, and a bypass path 43 indicating a jump destination when the second transition 42 is passed.

  The bypass path 43 bypasses the step "ST003" and connects the second transition 42 and the step "ST004" which is a step downstream of the intermediate step "ST003". That is, the jump destination of the bypass path 43 is immediately before the step one downstream of the step extracted as the intermediate step, and when the transition condition of the second transition 42 is satisfied, the transition “TR003 of the intermediate step Regardless of the success or failure of the assembly completion which is the transition condition of “1”, the steps after step “ST004” are executed. When a plurality of intermediate steps are extracted, the jump path of the bypass path 43 is the position immediately before the step further downstream of the most downstream step among them.

  The program element adding unit 212 adds the bypass circuit 4 to the chart program and also adds the circuit to the ladder program. 6 (a) to 6 (c) show an example of a ladder program generated by the program element adding unit 212, where (a) is an intermediate step, step "ST003", and (b) is a first transition 41. 7 (c) shows a ladder program corresponding to the second transition 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 the "EK03" which is a contact of the step activation relay of the step "ST003" is turned on. And a 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 in accordance with the ON / OFF state of the contact of the step activation relay “EK03”. The program creator can add other contacts such as various interlock signals as conditions for setting the keep relay “K01” as needed.

  As the second circuit 502, a circuit in which the keep relay "K01" is reset is generated by the b contact (inverted contact) of "V04" which is always on contact, but the b contact of "V04" is always off Because there is, keep relay "K01" is not reset with this circuit. Therefore, the program creator adds the 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 to the b contact of “V04” instead of the contact b.

  The keep relay “K01” is used as a transition condition in the first and second transitions 41 and. 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. In addition, a ladder program 52 configured to satisfy the transition condition is provided corresponding to the second transition 42 when the keep relay “K01” is set.

  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. Further, the relay “TR012” in the ladder program 52 assigned to the second transition 42 indicates the transition condition of the second transition 42, and if the relay “TR012” is in the on state, the second transition 42 is It becomes possible to pass.

  When automatic operation of the facility 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 next to step "ST002", control processing of step "ST003" is performed.

  On the other hand, at the time of restart when the assembling process to the work by the control process of the step "ST003" is started and then stopped halfway, the keep set by the first circuit 501 when the control process of the 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. This makes it possible to avoid damage to the work and the equipment 12.

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

(1) The intermediate step extracting unit 211 extracts an intermediate step to be processed into a work, and the program element adding unit 212 does not execute the processing of the intermediate step at the time of restarting after the intermediate stop Is added. Therefore, it is possible to reduce the burden on the program creator.

(2) The bypass path and transition generated by the program element adding unit 212 are added to the chart-type program as the program element, so that third parties (such as maintenance personnel of the facility 12) other than the program creator It becomes possible to grasp the contents easily.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIG. The control program editing device 2 according to the present embodiment is configured the same as that described in the first embodiment with reference to FIG. 2, but the content of processing by the program element adding unit 212 is the first. Is different from the embodiment of FIG. The process contents of the program element adding means 212 will be described in detail below, taking as an example the case of adding a program element for preventing the execution of the intermediate step to the control program including the chart type program shown in FIG. .

  The program element attachment means 212 according to the present embodiment corresponds to the intermediate step extracted by the intermediate step extraction means 211 as a program element for preventing the execution of the process of the intermediate step at the restart after the halfway stop. The transition ladder program is added with circuit elements for preventing the execution of this intermediate step.

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

  The ladder program 60 of step "ST003" is the same as that described in the first embodiment with reference to FIG. 6, and "EK03" which is a contact of the step activation relay of step "ST003" is in the on state As a result, 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" shown in FIG. 7 (b) is a relay indicating transition conditions of the transition "TR003", and if the relay "TR003" is in the on state, the transition "TR003" "Will be able to pass through. In addition, if relay “TR003” is in the on state before starting execution of step “ST003”, after passing transition “TR002” during continuous operation, without executing the control processing of step “ST003”, Pass the transition "TR003".

  In the ladder program 61 shown in FIG. 7B, various contacts corresponding to the configuration of the facility 12 are provided by the program creator in an area 610 surrounded by a dotted line. The program element adding unit 212 adds a contact (contact a) of the keep relay “K01” which is turned on in a state where the keep relay “K01” is set, in parallel with the area 610. As a result, at the time of restarting after the midway stop, the control process of step "ST003" is not executed.

  If such a contact (a contact) of the keep relay “K01” is added to the ladder program of the transition (TR001 to TR002) of the steps (ST001 to ST002) upstream of the intermediate step, after stopping The execution of the control process of steps (ST001 to ST002) can be omitted at the time of restarting.

  According to the present embodiment, the program element addition means 212 adds a program element for preventing the execution of the processing of the intermediate step at the time of restart after a halfway stop, and therefore, similar to the first embodiment. It is possible to reduce the burden on the program creator.

10: programmable controller, 100: base, 101: power supply module, 102: CPU module, 103: communication module, 104: output module, 105: input module, 12: facility (control target device), 121: actuator, 122: sensor 13, operation panel 130, monitor device 130a, display device 131, each piece selection switch 132, operation preparation switch 133, activation switch 134, execution switch 135, emergency stop switch 141, 142 communication cable 2: control program editing apparatus 20: body part 201: display 202: keyboard 203: touch pad 21: program editing part 211: intermediate step extracting means 212: program element adding means 22: storage part , 23 ... communication unit, 2 DESCRIPTION OF SYMBOLS 1 ... Comment column, 242 ... Pull-down menu column 243 ... OK button, 3 ... Monitor apparatus, 31 ... Display, 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 control program editing apparatus comprising: a program editing unit that edits a control program executable by a programmable controller that controls a control target device; and 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; and a chart type program including a plurality of transitions indicating transition conditions between the plurality of steps; operation contents of the plurality of steps; A ladder program representing transition conditions of the plurality of transitions by circuit elements including a plurality of contacts and a coil;
The program editing unit
Extraction means for extracting an intermediate step between a forward operation step of moving the movable part of the device to be controlled in one direction and a reverse operation step of operating the movable part in the reverse direction among the plurality of steps;
When the continuous operation is stopped halfway after the start of the execution of the intermediate step in the continuous operation in which the plurality of steps are continuously performed from the upstream side to the downstream side, and the chart type program is again executed from the most upstream step. Program element adding means for adding a program element for preventing execution of the intermediate step to the control program,
Control program editor. The program element addition means includes, as the program element, a bypass circuit connecting the upstream side and the downstream side in the chart-type program of the intermediate step, and the continuous operation is stopped halfway after the start of execution of the intermediate step. Adding a transition to the chart program to make the bypass circuit effective when the formula program is executed again from the most upstream step;
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 to the ladder program of the transition corresponding to the intermediate step.
The control program editing apparatus according to claim 1.

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