JP2013069101A - Programmable display and data processing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a programmable display and a data processing method which, in the event of communication failure in sending and receiving data, is capable of providing appropriate control in order to prevent malfunction and ensure smooth operation when the communication is reestablished.SOLUTION: A programmable display includes a controller 1 having input means 11 for receiving instruction data inputs and display means 13 for displaying operational information of an external device 3, and a controlled section 2 which is communicably connected with the controller 1 and transfers instruction data received from the controller 1 to the external device 3 and sends operational data acquired from the external device 3 to the controller 1. The controlled section 2 includes sequence data storage means 22 for dynamically storing operational status of the external device 3 as sequence data and, when communication failure is detected between the controller 1 and the controlled section 2, searches for sequence data corresponding to the operation at the time of the failure from the sequence data storage means 22 and halts transition of the sequence data identified from the search.

Description

  The present invention relates to a programmable display and a data processing method thereof.

  Conventionally, a programmable display is used to prevent malfunctions and prevent communication when a communication failure occurs between a control-side part that controls and a controlled-side part connected to an external device that is a control target. A process for enabling smooth operation at the time of recovery may be performed. As a data processing method when a failure occurs, for example, Patent Document 1 discloses a method in which all the contacts of the output circuit are turned OFF and the operation of the external device to be controlled is uniformly stopped when a communication failure occurs. ing. According to this method, the programmable display operates so as to follow the input operation again when communication is restored.

  As a data processing method at the time of occurrence of a failure, for example, Patent Document 2 discloses a method in which an ON state before the occurrence of a failure can be maintained for a contact point designated in advance in an output circuit. According to this method, when a failure occurs, the programmable display keeps the setting before the failure occurrence as it is for the contact point designated in advance, and continues the operation.

  Further, for example, in Patent Document 3, in a process control method that performs control according to setting data that is constantly captured, even if the setting data becomes an indefinite value due to the occurrence of a failure when registering the setting data in the control side part. A method of applying setting data registered in a controlled side part before a failure occurs is disclosed. According to this method, the programmable display device continues the operation according to the setting data registered in the controlled side portion when a failure occurs.

Japanese Patent No. 4041963 JP 60-181901 A JP-A-60-20401

  The method of executing the data processing to stop the operation of the external device uniformly by the occurrence of a failure and follow the input operation by the recovery is applied to the registration of the setting data unique to the programmable display or multiple contact settings. There may be a situation in which the contact setting in the middle is lost due to a failure. In such a situation, since it is unclear which setting is valid, setting mismatch occurs between the control side part and the controlled side part when communication is restored.

  In the method of designating in advance the contacts that hold the output state before the occurrence of the failure, it is necessary to confirm the significance of designation for each contact in advance, and it is difficult to ensure completeness. In addition, since a fixed value is applied to any setting at the time of occurrence of a failure, the data processing method may lack generality.

  Even if the setting data registered in the control-side part becomes an indefinite value due to the occurrence of a failure, the setting data set at the time of failure occurs in the method of applying the pre-failure setting data registered in the controlled-side part. This is a problem.

  The present invention has been made in view of the above, and when a failure occurs in communication for data transmission / reception, appropriate control for preventing malfunction and smooth operation at the time of communication restoration is performed. An object of the present invention is to obtain a programmable display device and a data processing method thereof.

  In order to solve the above-described problem and achieve the object, the present invention includes an input unit that receives input of instruction data for controlling an external device, a display unit that displays operation information related to the operation of the external device, A control unit that is capable of communicating with the control unit, transmits the instruction data received from the control unit to the external device, and transmits the operation information acquired from the external device to the control unit And the controlled unit has sequence data storage means for storing the operation state of the external device as sequence data as needed, and a failure in communication between the control unit and the controlled unit is detected. If detected, the controlled unit retrieves the sequence data corresponding to the operation when the failure occurs from the sequence data storage means, And wherein the stopping the transition of sequence data.

  According to the present invention, the controlled unit refers to the past sequence data read from the sequence data storage means, stops the sequence being executed by the input of the instruction data, and sequence data when a failure occurs Is identified. The controlled unit operates the external device so that the transition of the specified sequence data is stopped, so that it is possible to avoid occurrence of a problem when a failure occurs. When a failure occurs in communication for data transmission / reception, the programmable display can prevent malfunction and perform appropriate control for smooth operation when communication is restored.

FIG. 1 is a block diagram showing an overall schematic configuration of a programmable display according to an embodiment of the present invention. FIG. 2 is a flowchart illustrating an example of an operation procedure of the control unit of the programmable display. FIG. 3 is a flowchart illustrating an example of an operation procedure of the controlled unit of the programmable display.

  Embodiments of a programmable display and a data processing method thereof according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a block diagram showing an overall schematic configuration of a programmable display according to an embodiment of the present invention. The programmable display has a control unit 1 and a controlled unit 2. The control unit 1 and the controlled unit 2 can communicate with each other via the wireless connection path 5. The control unit 1 and the controlled unit 2 are not limited to those connected by the wireless connection path 5, and may be connected by a wired connection path.

  The control unit 1 includes input means 11, overall processing means 12, display means 13, display generation means 14, and instruction data storage means 15. The operator 4 inputs instruction data for controlling the external device 3 by operating the input unit 11. The input unit 11 receives input of instruction data by the operator 4.

  The overall processing unit 12 supervises processing operations by the control unit 1 and the controlled unit 2. The display unit 13 displays operation information related to the operation of the external device 3. The display means 13 is a liquid crystal display device, for example. The display generation unit 14 generates a screen to be displayed on the display unit 13 in accordance with the operation information from the overall processing unit 12. The instruction data storage unit 15 stores instruction data input from the input unit 11 when a failure occurs in communication between the control unit 1 and the controlled unit 2.

  The controlled unit 2 transmits the input instruction received from the control unit 1 to the external device 3 and transmits the operation information acquired from the external device 3 to the control unit 1. The controlled unit 2 includes an external device connection interface (I / F) 21 and sequence data storage means 22. The external device connection I / F 21 performs data input / output with the overall processing unit 12 and data input / output with the external device 3. The sequence data storage unit 22 stores the operation state of the external device 3 as sequence data as needed.

  FIG. 2 is a flowchart illustrating an example of an operation procedure of the control unit of the programmable display. When the input unit 11 receives an input instruction from the operator 4, the overall processing unit 12 determines whether or not the connection of the wireless connection path 5 has been established (step S1). When it is determined that no failure has occurred in the wireless connection path 5 and the connection has been established (step S1, Yes), the overall processing unit 12 transmits the input instruction data to the external device connection I / F 21. (Step S2).

  When it is determined that a failure has occurred in the wireless connection path 5 and the connection has not been established (No in step S1), the overall processing unit 12 sends the instruction data input from the input unit 11 to the instruction data storage unit 15. introduce. The instruction data storage unit 15 stores instruction data (step S3).

  Next, the overall processing unit 12 determines whether or not the connection via the wireless connection path 5 has been restored (step S4). When it is determined that the connection via the wireless connection path 5 has not been restored (No at Step S4), the overall processing unit 12 performs the determination at Step S4 until the connection is restored.

  When it is determined that the connection via the wireless connection path 5 has been restored (step S4, Yes), the overall processing unit 12 reads out the instruction data held in the instruction data storage unit 15 and transmits it to the external device connection I / F 21. (Step S5). As described above, when communication between the control unit 1 and the controlled unit 2 is restored, the control unit 1 transmits the instruction data held in the instruction data storage unit 15 to the controlled unit 2.

  Thereby, the programmable display device suppresses the omission of the instruction data in the controlled unit 2, and can prevent malfunction and complete the sequence. By transmitting the instruction data in step S2 or step S5, the control unit 1 ends a series of operations corresponding to the instruction data.

  FIG. 3 is a flowchart illustrating an example of an operation procedure of the controlled unit of the programmable display. The external device connection I / F 21 monitors the state of the wireless connection path 5 and determines whether or not the connection of the wireless connection path 5 has been established (step S11). When it is determined that a failure has not occurred in the wireless connection path 5 and the connection has been established (step S11, Yes), when the instruction data from the overall processing means 12 is received (step S12), the external device connection I / F21 transmits the received instruction data to the external device 3. As a result, the controlled unit 2 causes the external device 3 to execute a sequence corresponding to the instruction data (step S13).

  The external device 3 transmits operation information related to the operation executed according to the instruction data to the external device connection I / F 21. The external device connection I / F 21 transmits the operation information from the external device 3 to the sequence data storage unit 22.

  The sequence data storage means 22 stores operation information from the external device connection I / F 21 as sequence data (step S14). The sequence data storage unit 22 accumulates the sequence execution history in the external device 3 as sequence data when there is no communication failure.

  When it is determined that a failure has occurred in the wireless connection path 5 and the connection has not been established (No in step S11), the external device connection I / F 21 determines from the sequence data stored in the sequence data storage unit 22 The sequence data corresponding to the operation of the external device 3 when a failure occurs is searched (step S15). As described above, when the controlled unit 2 detects a failure in communication between the control unit 1 and the controlled unit 2, the sequence data storage means stores the sequence data corresponding to the operation of the external device 3 when the failure occurs. Search from 22.

  The external device connection I / F 21 stops the transition of the sequence data specified by the search in the sequence data storage unit 22 (step S16). Stopping the transition of the sequence data refers to, for example, stopping of the transition of the contact point operated according to the instruction data and the increase / decrease of the numerical value indicating the operation state. The external device 3 stops the sequence being executed according to the instruction data.

  Next, the external device connection I / F 21 determines whether or not the connection via the wireless connection path 5 has been restored (step S17). When it is determined that the connection via the wireless connection path 5 has not been recovered (No at Step S17), the external device connection I / F 21 performs the determination at Step S17 until the connection is recovered.

  If it is determined that the connection via the wireless connection path 5 has been restored (step S17, Yes), the external device connection I / F 21 transmits the sequence data specified by the search in step S15 to the external device 3. As a result, the controlled unit 2 causes the external device 3 to re-execute the sequence that was being executed when the failure occurred. The sequence data storage unit 22 erases the stored sequence data (step S18). By storing the sequence data in step S14 or re-executing the sequence and erasing the sequence data in step S18, the controlled unit 2 terminates a series of operations depending on whether there is a failure.

  The programmable display device can avoid the occurrence of a failure when a failure occurs by specifying the sequence when the failure occurs from the sequence data stored in the sequence data storage unit 22 and stopping the transition of the sequence data.

  When the failure is resolved, the programmable display unit re-executes the sequence that was being executed before the failure occurred and erases the stored sequence data, so that the control unit 1 and the controlled object at the time of communication restoration Inconsistency and omission of setting with the unit 2 are suppressed. The programmable display device avoids malfunctions at the time of failure occurrence and maintains matching of settings in the control unit 1 and the controlled unit 2 to prevent malfunction and smooth operation when communication is restored. Appropriate controls can be implemented.

  The programmable display and its data processing method according to the present invention are particularly suitable when importance is attached to the certainty of data transmission between an operator and an external device, or when an unstable communication situation is assumed.

DESCRIPTION OF SYMBOLS 1 Control part 2 Controlled part 3 External apparatus 4 Operator 5 Wireless connection path 11 Input means 12 Overall processing means 13 Display means 14 Display generation means 15 Instruction data storage means 21 External equipment connection I / F
22 Sequence data storage means

Claims (4)

A control unit comprising input means for receiving input of instruction data for controlling the external device, and display means for displaying operation information related to the operation of the external device;
A controlled unit that is communicable with the control unit, transmits the instruction data received from the control unit to the external device, and transmits the operation information acquired from the external device to the control unit. ,
The controlled part has sequence data storage means for storing the operation state of the external device as sequence data as needed,
When a failure is detected in communication between the control unit and the controlled unit, the controlled unit searches the sequence data storage unit for the sequence data corresponding to the operation when the failure occurs, and performs a search. The programmable display characterized by stopping the transition of the said sequence data specified by (4). When communication between the control unit and the controlled unit is restored,
The controlled unit causes the external device to execute again the operation when the failure occurs,
2. The programmable display device according to claim 1, wherein the sequence data storage unit erases the sequence data stored therein. The control unit has instruction data storage means for storing the instruction data input from the input means when the failure occurs,
The control unit transmits the instruction data held in the instruction data storage unit to the controlled unit when communication between the control unit and the controlled unit is restored. The programmable display according to 1 or 2. A step of accepting input of instruction data for controlling an external device at the control unit;
Transmitting the instruction data from the control unit to a controlled unit capable of communicating with the control unit;
Transmitting the instruction data from the controlled unit to the external device;
Obtaining operation information on the operation of the external device in the controlled unit;
Transmitting the operation information from the controlled unit to the control unit;
Displaying the operation information in the control unit;
Storing the operation state of the external device as sequence data at any time, and
When a failure in communication between the control unit and the controlled unit is detected, the sequence data corresponding to the operation when the failure occurs is searched, and the transition of the sequence data specified by the search is stopped The data processing method of the programmable display characterized by the above-mentioned.

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