WO2016185558A1 - プログラマブルロジックコントローラ、エンジニアリングツール及びエンジニアリングツールプログラム - Google Patents
プログラマブルロジックコントローラ、エンジニアリングツール及びエンジニアリングツールプログラム Download PDFInfo
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
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- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/056—Programming the PLC
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
- G05B2219/13018—Conversion ladder diagram to decision system, machine code, language
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14055—Make log, journal, history file of state changes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14098—Displaying instructions for monitoring state of machine
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14115—Rapid recovery after fault detection
Definitions
- the present invention relates to a programmable logic controller, an engineering tool, and an engineering tool program that can easily perform troubleshooting.
- the programmable logic controller has a problem that it takes time to troubleshoot when a malfunction of a sequential function chart (Sequential Function Chart, SFC) program occurs due to an illegal operation of a device value.
- SFC sequential Function Chart
- Patent Document 1 discloses a programmable logic controller in which an SFC program and an output state of a device in the SFC program can be confirmed on one screen in order to simplify troubleshooting.
- the present invention has been made in view of the above, and an object of the present invention is to obtain a programmable logic controller that can display all device outputs in a step and can check a device operation process retroactively.
- the present invention provides a sequential function having a plurality of blocks each including a first basic unit indicating an operation output and a second basic unit indicating a transition condition.
- a programmable logic controller that executes a chart program, and includes a device data collection unit and a device data collection unit that collect device data of a device included in an active first basic unit for each scan when executing a sequential function chart program
- a device data storage unit for storing collected data; and a device data output unit for outputting data stored in the device data storage unit to a storage medium in a file for each first basic unit or block.
- the programmable logic controller according to the present invention can display all the device outputs in the step, and has the effect of being able to confirm the operation process of the device retroactively.
- FIG. 1 is a diagram illustrating a hardware configuration of an information processing apparatus that implements an engineering tool according to a first embodiment;
- the figure which shows the structure of the SFC program which the programmable logic controller concerning Embodiment 1 performs A flowchart showing a flow of device data collection operation of the programmable logic controller according to the first embodiment.
- the figure which shows the example of the troubleshooting by the engineering tool concerning Embodiment 1 The figure which shows the example of the troubleshooting by the engineering tool concerning Embodiment 1
- the figure which shows the example of the troubleshooting by the engineering tool concerning Embodiment 1 The figure which shows the structure of the programmable logic controller and engineering tool concerning Embodiment 2 of this invention.
- a flowchart showing a flow of device data collection operation of the programmable logic controller according to the second embodiment A flowchart showing a flow of block activation processing of the programmable logic controller according to the second embodiment.
- FIG. 1 is a diagram illustrating configurations of a programmable logic controller and an engineering tool according to the first embodiment of the present invention.
- the programmable logic controller 1 according to the first embodiment includes a device data collection function unit 2 that collects device data, a step that is a first basic unit that indicates an operation output, and a transition that is a second basic unit that indicates a transition condition. And an SFC monitoring unit 3 that monitors the SFC program configured to transmit the monitoring result to the engineering tool 12.
- the programmable logic controller 1 includes an SFC program execution unit 4 that executes an SFC program, an SFC device analysis check unit 6 that is a device analysis check unit that checks whether or not a device in a step has been analyzed, and a programmable logic controller 1
- An SFC device analysis unit 7 that is a device analysis unit that analyzes device data in a step when the logic controller 1 is powered on or after execution of a program in the step, and a device data collection unit that collects a device output state when the step is activated
- the SFC device data collection unit 8, the SFC device data storage unit 9 which is a device data storage unit for storing the collected device output state, and the device output state stored in the SFC device data storage unit 9 are storage media.
- a SFC device data output unit 10 is a device data output unit for file output for each flop.
- the SFC device data storage unit 9 has a ring buffer structure, and is rewritten from old information to new information in order. Note that the storage medium that stores the device output state is not limited to the memory card 11.
- FIG. 2 is a diagram illustrating a hardware configuration of the programmable logic controller according to the first embodiment.
- the programmable logic controller 1 includes an arithmetic device 21 that executes a program, a memory 22 that the arithmetic device 21 uses as a work area, a storage device 23 that stores programs and data, and a memory card writer 24 that records information in the memory card 11. And a communication device 25 for communication with the engineering tool 12.
- a CPU Central Processing Unit
- a RAM Random Access Memory
- a nonvolatile semiconductor memory can be applied to the storage device 23.
- the memory card writer 24 may be externally attached to the programmable logic controller 1.
- the device data collection function unit 2 is realized by using the work area and executing the software. A plurality of arithmetic devices and a plurality of memories may cooperate to execute the above function.
- the SFC monitor unit 3 is realized by the arithmetic device 21 and the communication device 25.
- the device data storage unit 9 for SFC is realized by the storage device 23.
- the SFC device data output unit 10 is realized by the memory card writer 24.
- the engineering tool 12 superimposes and displays the SFC output file reading unit 13 for reading a file from the memory card 11 and the device data read by the SFC output file reading unit 13 on the SFC program.
- the display unit 14 includes an SFC display unit 14 and a monitor result display unit 15 that receives and displays the monitor result of the SFC program from the programmable logic controller 1.
- FIG. 3 is a diagram illustrating a hardware configuration of the information processing apparatus that implements the engineering tool according to the first embodiment.
- the information processing device 30 includes an arithmetic device 31 that executes a program, a memory 32 that the arithmetic device 31 uses as a work area, a storage device 33 that stores an engineering tool program 38 and data, a display device 34 that displays information, An input device 35 that is a user interface for a user to input information, a memory card reader 36 that reads information from the memory card 11, and a communication device 37 for communication with the programmable logic controller 1 are included.
- a CPU Central Processing Unit
- a RAM Random Access Memory
- a nonvolatile semiconductor memory or a hard disk drive can be applied to the storage device 33.
- a liquid crystal display device can be applied to the display device 34.
- a keyboard and a mouse can be applied to the input device 35.
- the memory card reader 36 may be externally attached to the information processing apparatus 30.
- the display device 34 and the input device 35 do not need to be housed in a casing that is integral with the arithmetic device 31, the memory 32, and the storage device 33.
- the information processing apparatus 30 is the engineering tool 12 when the arithmetic device 31 executes the engineering tool program 38 stored in the storage device 33 using the memory 32 as a work area. That is, the SFC display unit 14 shown in FIG. 1 is realized when the arithmetic device 31 executes the engineering tool program 38 stored in the storage device 33 using the memory 32 as a work area. A plurality of arithmetic devices and a plurality of memories may cooperate to execute the above function.
- the SFC output file reading unit 13 is realized by the memory card reader 36.
- the monitor result display unit 15 is realized by the arithmetic device 31, the display device 34, and the communication device 37.
- FIG. 4 is a diagram illustrating the structure of the SFC program executed by the programmable logic controller according to the first embodiment.
- the SFC program 40 is described in a description format of a control specification that can divide a series of control operations into a plurality of steps and clearly express the execution order and execution conditions of the program.
- the SFC program 40 includes three blocks of a block [1] 41, a block [2] 42, and a block [3] 43.
- the block [1] 41 includes a plurality of steps and transitions of step [1], step [2], step [3],.
- Each step is a first basic unit constituting a block, and indicates an operation output.
- Each transition is a second basic unit constituting the block, and indicates a condition for moving to the next step.
- step [1] If the transition condition c1 is satisfied when step [1] is active, step [2] is active and step [1] is inactive. If the transition condition c2 is satisfied when step [2] is active, step [3] becomes active and step [2] becomes inactive. If the transition condition c3 is satisfied when the step [3] is active, the step [3] becomes inactive and the next step becomes active.
- Block [2] 42 includes a plurality of steps of step [11], step [12], step [13],. If the transition condition c11 is satisfied when the step [11] is active, the step [12] is active and the step [11] is inactive. If the transition condition c12 is satisfied when the step [12] is active, the step [13] becomes active and the step [12] becomes inactive. If the transition condition c13 is satisfied when the step [13] is active, the step [13] becomes inactive and the next step becomes active.
- Block [3] 43 includes a plurality of steps of step [21], step [22], step [23],. If the transition condition c21 is satisfied when the step [21] is active, the step [22] becomes active and the step [21] becomes inactive. If the transition condition c22 is satisfied when the step [22] is active, the step [23] becomes active and the step [22] becomes inactive. If the transition condition c23 is satisfied when the step [23] is active, the step [23] becomes inactive and the next step becomes active.
- FIG. 5 is a flowchart of a device data collection operation performed by the programmable logic controller according to the first embodiment.
- the SFC program execution unit 4 performs an initial process.
- the SFC program execution unit 4 performs an SFC program execution process.
- the SFC program execution unit 4 performs end processing.
- the processes of step S12 and step S13 are executed during one scan which is the operation cycle of the programmable logic controller 1.
- FIG. 6 is a flowchart showing the flow of the SFC program execution process of the programmable logic controller according to the first embodiment.
- the SFC program execution processing loop processing is performed for the number of blocks of the SFC program.
- block activation processing is performed in step S21.
- the SFC program execution unit 4 ends the SFC program execution process.
- FIG. 7 is a flowchart showing a flow of block activation processing of the programmable logic controller according to the first embodiment.
- the loop process is performed for the number of steps in the block.
- the SFC program execution unit 4 determines whether the step of the SFC program is active. If the step of the SFC program is not active, No is made in step S31, the loop process is terminated, and the loop process is performed for the next step. If the step of the SFC program is active, “Yes” is determined in step S31, and in step S32, the SFC program execution unit 4 executes the operation output in the step.
- step S33 the SFC device analysis check unit 6 determines whether or not the device in the step has been analyzed. If it has been analyzed, Yes in step S33, and the process proceeds to step S35. If it has not been analyzed, No is determined in step S33, and in step S34, the SFC device analysis unit 7 analyzes the device in the step.
- the storage area for the analyzed step is formed in the device data storage unit 9 for SFC. Since the device data storage unit 9 for SFC has a ring buffer structure, when the storage device 23 has no free capacity, the oldest storage area in the device data storage unit 9 for SFC newly analyzes the device. It is rewritten to the storage area.
- step S ⁇ b> 35 the SFC device data collection unit 8 stores the device output state in the step in the SFC device data storage unit 9. When the number of steps of the SFC program loops, the SFC device data collection unit 8 ends the process.
- the SFC device data collection unit 8 identifies the active step in the SFC program, and stores the device data in the SFC device data storage unit 9.
- FIG. 8 is a diagram schematically illustrating data collection timing of the programmable logic controller according to the first embodiment.
- step [1] is active at the start of scanning, so the SFC device data collection unit 8 uses the device data of step [1] in step [1] in the SFC device data storage unit 9. ] Is stored in the storage area 91.
- the transition condition a is established during the scan and step [1] is deactivated and step [2] is activated, but step [1] is active at the start of the scan. Therefore, the device data collection unit 8 for SFC stores the device data of step [1] in the storage area 91 for step [1] in the device data storage unit 9 for SFC.
- the transition condition b is established during the scan and step [2] is inactive, and step [3] is active, but step [2] is active at the start of the scan. Therefore, the device data collection unit for SFC 8 stores the device data of step [2] in the storage area 92 for step [2] in the device data storage unit 9 for SFC.
- step [3] is active at the start of scanning, so the SFC device data collection unit 8 uses the device data in step [3] as the step [3 in the SFC device data storage unit 9. ] Is stored in the storage area 93.
- the device data stored in the SFC device data storage unit 9 is output to the memory card 11 by the SFC device data output unit 10 when the step is inactive.
- the device data of step [1] stored in the storage area 91 for step [1] is output to the memory card 11 by the SFC device data output unit 10 after the third scan.
- Device data is stored in the memory card 11 as files in units of steps or blocks.
- step [3] of the SFC program When troubleshooting with the engineering tool 12, the location where the illegal calculation occurred is identified by checking the device calculation process retroactively from the location where the illegal calculation occurred in the SFC program.
- the SFC monitor unit 3 detects that an illegal operation has occurred in step [3] of the SFC program, the monitor result is displayed on the engineering tool 12 by the monitor result display unit 15. Therefore, the user starts troubleshooting from step [3] of the SFC program.
- FIG. 9 shows the device data display screen 53 of step [3]. From the device data display screen 53 in step [3] of the SFC program, it can be confirmed that if the value of the device D1 is larger than 120, an illegal operation occurs and the value of the device D1 is 130.
- step [2] which is the step immediately preceding step [3] in the SFC program
- the device data of step [2] is read from the memory card 11 by the SFC output file reading unit 13 and displayed by the SFC display unit 14.
- FIG. 10 shows the device data display screen 52 in step [2]. From the device data display screen 52 in step [2], it can be confirmed that the value of the device D1 is 130 as a result of adding 20 to the device D1.
- step [1] which is the step immediately preceding step [2] is read from the memory card 11 by the SFC output file reading unit 13 and displayed by the SFC display unit 14.
- FIG. 11 shows the device data display screen 51 of step [1]. From the device data display screen 51 in step [1], it can be confirmed that the value of the device D1 has become 110 as a result of adding 10 to the device D1.
- the device data can be confirmed using a graphical user interface for displaying the SFC program.
- a graphical user interface that displays an SFC program, troubleshooting is easier than when checking device data with numerical data using spreadsheet software.
- the device in the step is analyzed when the operation output in the step is executed.
- the power of the programmable logic controller is turned on
- the device in each step of the SFC program is analyzed. Also good. If the device of each step of the SFC program is analyzed when the power of the programmable logic controller is turned on, the process of step S33 for determining whether the device in the step has been analyzed and the device in the step when executing the SFC program Since the process of step S34 for analyzing the process can be omitted, the execution speed of the SFC program can be increased.
- the storage area for each step is secured in the device data storage unit for SFC at the time of analyzing the device in the step, if the device is analyzed when the power of the programmable logic controller is turned on, the device data storage for SFC
- the storage device that realizes the storage unit is required to have a storage capacity that can secure device data storage units for all steps of the SFC program. Therefore, based on the number of steps of the SFC program and the storage capacity of the storage device, it is preferable to determine whether to analyze the device when the power source of the programmable logic controller is turned on.
- device data is collected for each step of the SFC program, so that all device outputs in the step can be displayed, and the operation process of the device can be confirmed retroactively.
- FIG. FIG. 12 is a diagram illustrating configurations of the programmable logic controller and the engineering tool according to the second embodiment of the present invention.
- the programmable logic controller 61 according to the second embodiment includes the SFC parameter storage unit 5 that stores parameters in which whether or not device data is collected and the range of steps to be collected is set for each block.
- the programmable logic controller 1 is different.
- the SFC program execution unit 4 executes the SFC program according to the setting of the SFC parameters.
- the hardware configuration of the programmable logic controller 61 is the same as that of the programmable logic controller 1 of the first embodiment. Therefore, the SFC parameter storage unit 5 illustrated in FIG. 12 is realized by the storage device 23.
- the engineering tool 62 has an SFC parameter setting unit 16 that sets whether or not to collect device data and sets a range of steps for collecting device data. This is different from the engineering tool 12 of the first embodiment.
- the hardware configuration of the information processing apparatus that implements the engineering tool 62 according to the second embodiment is the same as that of the first embodiment. Therefore, the SFC parameter setting unit 16 shown in FIG. 12 is realized when the arithmetic device 31 executes the engineering tool program 38 stored in the storage device 33 using the memory 32 as a work area.
- FIG. 13 is a diagram illustrating an example of the SFC parameter setting screen of the engineering tool according to the second embodiment.
- the SFC parameter setting screen 70 is provided with a device data collection setting column 71 and a device data collection range setting column 72.
- the device data collection setting column 71 is a pull-down menu, and either “collect device data” or “do not collect device data” can be selected alternatively.
- a device data collection range setting dialog 73 is popped up.
- the device data collection range setting dialog 73 includes a block name designation column 731 and a collection range designation column 732. In FIG. 13, the setting for collecting device data is made between step [0] and step [3] of block [1].
- FIG. 14 is a flowchart of the device data collection operation of the programmable logic controller according to the second embodiment.
- the initial process of step S11 ' is different from the initial process of step S11 of the first embodiment in that it includes a process of acquiring parameters set in the SFC parameter setting unit 16 by the engineering tool 62.
- the flow of the SFC program execution process of the programmable logic controller 61 according to the second embodiment is the same as that of the first embodiment.
- FIG. 15 is a flowchart illustrating a flow of block activation processing of the programmable logic controller according to the second embodiment.
- step S36 which is a process for confirming the SFC parameter
- step S37 which is a process for confirming whether it is within the device data collection range. This is different from the block activation process of the programmable logic controller 1 according to the first embodiment.
- step S36 the device data collection unit 8 for SFC confirms whether the SFC parameter is set to collect device data. If the setting is to collect device data, the determination is YES in step S36, and the device data collection unit 8 for SFC confirms whether it is within the device data collection range in step S37. If it is within the device data collection range, Yes in step S37, and the process proceeds to step S33.
- step S36 If the SFC parameter is set not to collect device data, No is returned in step S36 and the process is terminated. If it is outside the range of the device data collection range, No is returned in step S37 and the process is terminated.
- the programmable logic controller 61 switches whether or not to collect device data within a step with SFC parameters in units of blocks.
- the device data collection range can be set in units of steps. Device data can be collected only when shooting is necessary. For this reason, it is possible to prevent the scan time of the programmable logic controller 61 from deteriorating during normal operation.
- the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
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Abstract
Description
図1は、本発明の実施の形態1にかかるプログラマブルロジックコントローラ及びエンジニアリングツールの構成を示す図である。実施の形態1にかかるプログラマブルロジックコントローラ1は、デバイスデータを収集するデバイスデータ収集機能部2と、動作出力を示す第1の基本単位であるステップと移行条件を示す第2の基本単位であるトランジションとを含んで構成されたSFCプログラムをモニタしてモニタ結果をエンジニアリングツール12へ送信するSFCモニタ部3と、を有する。また、プログラマブルロジックコントローラ1は、SFCプログラムを実行するSFC用プログラム実行部4と、ステップ内のデバイスを解析済か否かを確認するデバイス解析チェック部であるSFC用デバイス解析チェック部6と、プログラマブルロジックコントローラ1の電源オン時又はステップ内のプログラム実行後にステップ内のデバイスデータを解析するデバイス解析部であるSFC用デバイス解析部7と、ステップ活性時にデバイス出力状態を収集するデバイスデータ収集部であるSFC用デバイスデータ収集部8と、収集したデバイス出力状態を記憶するデバイスデータ記憶部であるSFC用デバイスデータ記憶部9と、SFC用デバイスデータ記憶部9に記憶したデバイス出力状態を記憶媒体であるメモリカード11へステップごとにファイル出力するデバイスデータ出力部であるSFC用デバイスデータ出力部10とを有する。SFC用デバイスデータ記憶部9は、リングバッファ構造になっており、古い情報から順に新しい情報に書き換えられる。なお、デバイス出力状態を記憶する記憶媒体は、メモリカード11に限定されることはない。
図12は、本発明の実施の形態2にかかるプログラマブルロジックコントローラ及びエンジニアリングツールの構成を示す図である。実施の形態2にかかるプログラマブルロジックコントローラ61は、デバイスデータを収集するか否か及び収集するステップの範囲をブロックごとに設定したパラメータを記憶するSFCパラメータ記憶部5を有する点で、実施の形態1のプログラマブルロジックコントローラ1と相違する。なお、実施の形態2では、SFC用プログラム実行部4は、SFCパラメータの設定に従ってSFCプログラムを実行する。
Claims (6)
- 動作出力を示す第1の基本単位と移行条件を示す第2の基本単位とを含んで構成されたブロックを複数有するシーケンシャルファンクションチャートプログラムを実行するプログラマブルロジックコントローラであって、
前記シーケンシャルファンクションチャートプログラムの実行時に、活性な第1の基本単位に含まれるデバイスのデバイスデータをスキャンごとに収集するデバイスデータ収集部と、
前記デバイスデータ収集部が収集したデータを記憶するデバイスデータ記憶部と、
前記デバイスデータ記憶部に記憶したデータを前記第1の基本単位ごと又は前記ブロックごとのファイルで記憶媒体に出力するデバイスデータ出力部と、
を有することを特徴とするプログラマブルロジックコントローラ。 - 前記デバイスデータを収集するか否かと、前記デバイスデータを収集する第1の基本単位とを前記ブロックごとに設定したパラメータを記憶するパラメータ記憶部を有することを特徴とする請求項1に記載のプログラマブルロジックコントローラ。
- 動作出力を示す第1の基本単位と移行条件を示す第2の基本単位とを含んで構成されたブロックを複数有するシーケンシャルファンクションチャートプログラムを実行するプログラマブルロジックコントローラの動作をモニタするエンジニアリングツールであって、
前記プログラマブルロジックコントローラが前記シーケンシャルファンクションチャートプログラムを実行する際の活性な第1の基本単位に含まれるデバイスのデバイスデータが、前記第1の基本単位ごと又は前記ブロックごとのファイルで書き込まれた記憶媒体から、前記デバイスデータを読み出す出力ファイル読み込み部と、
前記ファイル読み込み部が読み出したデバイスデータを、前記シーケンシャルファンクションチャートに重畳して表示する表示部とを有することを特徴とするエンジニアリングツール。 - 前記デバイスデータを収集するか否かと、前記デバイスデータを収集する第1の基本単位の範囲とを示すパラメータを、前記ブロックごとに設定するシーケンシャルファンクションチャートパラメータ設定部を有することを特徴とする請求項3に記載のエンジニアリングツール。
- コンピュータに、プログラマブルロジックコントローラの動作をモニタさせるエンジニアリングツールプログラムであって、
前記コンピュータに、
動作出力を示す第1の基本単位と移行条件を示す第2の基本単位とを含んで構成されたブロックを複数有するシーケンシャルファンクションチャートプログラムを実行するプログラマブルロジックコントローラが、前記シーケンシャルファンクションチャートプログラムを実行する際の活性な第1の基本単位に含まれるデバイスのデバイスデータが、前記第1の基本単位ごと又は前記ブロックごとのファイルで書き込まれた記憶媒体から、前記デバイスデータを読み出す処理と、
読み出した前記デバイスデータを、前記シーケンシャルファンクションチャートに重畳して表示する処理とを実行させることを特徴とするエンジニアリングツールプログラム。 - 前記コンピュータに、前記デバイスデータを収集するか否かと、前記デバイスデータを収集する第1の基本単位の範囲とを示すパラメータを、前記ブロックごとに設定する処理を行わせることを特徴とする請求項5に記載のエンジニアリングツールプログラム。
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