A control method for switching operation permissions of a centralized control system

Abstract

The present invention discloses a control method for switching operation permissions of a centralized control system. The method includes: when performing an operation permission switching operation on the centralized control console, determining whether the operation instruction states of the same operation buttons on the centralized control console and the local operation console are consistent; locking the operation buttons with inconsistent operation instruction states on the centralized control console and the local operation console; when operating on the currently locked operation button on the operation console with operation permissions, automatically releasing the locked state of the currently locked operation button; wherein, for the operation buttons after being locked, all operations thereof are invalid until the locked state is released. The control principle of the solution of the present invention is simple. When switching operation permissions of the operation console, by automatically locking and unlocking the operation buttons, it is ensured that the operation instructions do not change, and the safety and efficiency of the operation permission switching process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic control, and particularly relates to a control method for switching operation permissions of a centralized control system. Background Art

[0002] The key concerns of an intelligent factory mainly aim at process control intelligence and fewer personnel in production operations to achieve centralized control of workshop operations, and the centralized control operation console is the operation terminal for centralized control. Most of the centralized control construction in intelligent factories is based on the transformation of old production lines. At the initial stage of the centralized control project construction, considering the system stability, production continuity, and risk controllability, a technical solution of coexistence of a local operation console and a centralized control operation console is mostly adopted. When the centralized control operation console cannot be operated due to a fault, it is still possible to choose to operate on the local operation console, thereby effectively reducing the risk of centralized control transformation.

[0003] Generally, the types of operation buttons on the operation console include buttons, switches, joysticks, etc. The operation buttons have self-resetting forms and self-locking forms, and have pulse trigger forms and non-pulse trigger forms. Therefore, if a device can be controlled by multiple operation consoles, it is necessary to manage the switching of control permissions, otherwise it will lead to disordered device control. Moreover, when we switch the operation permissions of the operation console, we do not want to change the control instructions of the operation buttons. Due to the existence of self-locking form and non-pulse trigger form operation buttons on the operation console, when switching operation permissions between two or more operation consoles, there will be a situation where the states of the same physical button on different operation consoles before and after the operation permission switching are inconsistent. If no treatment is done, the operation instruction will change during the operation permission switching process, which may lead to abnormal actions of the device and pose a safety hazard. There are two traditional operation permission switching methods: 1) Switch operation permissions in the shutdown state; 2) Manually adjust the operation button states of the two operation consoles to be the same, and then switch the operation permissions. The traditional operation permission switching process is relatively complex. How to switch operation permissions between different operation consoles safely and efficiently is a technical problem that needs to be considered key in system design. Summary of the Invention

[0004] The present invention provides a control method for switching operation permissions of a centralized control system to solve the technical problem of the relatively complex traditional operation permission switching process.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A control method for switching operation authority of a centralized control system, the centralized control system comprises an operation console and a PLC controller, the operation console comprises a local operation console and a centralized control operation console, the local operation console and the centralized control operation console are both connected to the PLC controller; the local operation console and the centralized control operation console have the same operation functions, the operation authority is divided into the centralized control operation console operation authority and the local operation console operation authority, and only one operation console can have the operation authority at the same time; the PLC controller completes the control of the operation authority switching logic, the method comprises:

[0007] When performing a switching operation on the centralized control console, determining whether the operation instruction states of the same operation button on the centralized control console and the local console are consistent;

[0008] When the operation instruction states of the same operation button on the centralized control console and the local operation console are inconsistent, locking the operation button with the inconsistent operation instruction states on the centralized control console and the local operation console;

[0009] When an operation is performed on a currently locked operation button on an operation console with operation authority, if the operation instruction meets the preset conditions, the lock state of the currently locked operation button is automatically released; wherein, for the locked operation button, except for the operation that meets the preset conditions, all other operations on it are invalid until its lock state is released.

[0010] Furthermore, the basis for judging whether the operation instruction states of the same operation buttons on the centralized control console and the local console are consistent is: if the operation instruction given states of the same operation buttons on the centralized control console and the local console are exactly the same, then they are judged to be consistent; otherwise, they are judged to be inconsistent.

[0011] Furthermore, when locking the operation buttons of the centralized control console and the local console whose operation instruction states are inconsistent, the operation buttons are locked based on the operation instructions of the operation buttons of the console that has the operation authority before the operation authority is switched.

[0012] Furthermore, when locking the operation buttons of the centralized control console and the local console whose operation instruction states are inconsistent, the method further includes:

[0013] An alarm will be issued on the HMI human-machine interface for locked operation buttons.

[0014] Furthermore, the preset condition is that the operation instruction of the operation button of the operation console with operation authority is the same as the locked instruction.

[0015] Furthermore, the switching of the operating authority does not include an emergency stop button.

[0016] The beneficial effects brought by the technical solution provided by the present invention at least include:

[0017] Through the judgment of the consistency of the operation instruction status of the same operation button on different operation consoles, the above technical solution provided by the present invention automatically locks the inconsistent operation buttons, and then automatically unlocks them by operating the locked operation buttons, ensuring the safety and efficiency of the operation permission switching. Compared with the traditional operation permission switching method, the technical solution of the present invention does not require shutdown or operators to adjust the operation buttons, and the permission switching process is simpler. At the same time, the technical solution of the present invention can be realized without additional hardware investment, with obvious effects, achieving both safe and efficient operation permission switching and reducing the labor intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0019] Figure 1 is the control logic relationship diagram of the centralized control system provided by the embodiment of the present invention;

[0020] Figure 2 is the flowchart of the control method for the operation permission switching of the centralized control system provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the drawings.

[0022] The First Embodiment

[0023] This embodiment provides a control method for the operation permission switching of a centralized control system. As Figure 1 shown, the control system includes an operation console and a PLC controller. The operation console includes several local operation consoles located in the local operation room and a centralized control operation console located in the centralized control center. The local operation consoles and the centralized control operation console are both connected to the PLC controller through a communication network. The centralized control operation console is used to centrally control the functions of the local operation consoles. The local operation consoles and the centralized control operation console have the same operation functions. The PLC controller selects and judges the operation permissions of the local operation consoles and the centralized control operation console, and then realizes the control of the electrical and mechanical equipment at the production site. Among them, the operation permissions are divided into the operation permission of the centralized control operation console and the operation permission of the local operation console. Only one operation console can have the operation permission at the same time.

[0024] Based on the above, when switching the operation permission between the operation consoles, the control method of this embodiment ensures that the operation instructions do not change and improves the safety and efficiency of the operation permission switching process by judging whether the operation instruction states of the same operation buttons on different operation consoles are consistent, as well as the automatic locking and unlocking of the operation buttons. Specifically, the execution process of the control method of this embodiment is as Figure 2 shown, including the following processes:

[0025] When performing the operation permission switching operation on the centralized control operation console, judge whether the operation instruction states of the same operation buttons on the centralized control operation console and the local operation console are consistent;

[0026] It should be noted that in this embodiment, the basis for judging whether the operation instruction states of the same operation buttons on the operation consoles are consistent is: if the operation instruction given states of the same operation buttons on the centralized control operation console and the local operation console are exactly the same, it is determined to be consistent; otherwise, it is determined to be inconsistent.

[0027] When the operation instruction states of the same operation buttons on the centralized control operation console and the local operation console are inconsistent, lock the operation buttons with inconsistent operation instruction states on the centralized control operation console and the local operation console;

[0028] It should be noted that in this embodiment, when locking the operation buttons with inconsistent operation instruction states on the centralized control operation console and the local operation console, the operation instructions of the operation buttons on the operation console with the operation permission before the operation permission switching are used as the reference for locking the operation buttons.

[0029] Furthermore, when locking the operation buttons with inconsistent operation instruction states on the centralized control operation console and the local operation console, the method further includes: giving an alarm prompt on the HMI human-machine interface.

[0030] When operating the currently locked operation button on the operation console with the operation permission, if the operation instruction meets the preset conditions, the locked state of the currently locked operation button is automatically released; among them, for the locked operation button, all other operations except the operations that meet the preset conditions are invalid until its locked state is released.

[0031] It should be noted that in this embodiment, the preset condition is: the operation instruction of the operation button on the operation console with the operation permission is the same as the locked instruction.

[0032] In addition, it should be noted that in this embodiment, the switching of the operation permission does not include the emergency stop button, that is, the emergency stop buttons on the centralized control operation console and the local operation console are effective regardless of which operation console the operation permission is on.

[0033] In summary, when the operation permission is switched on the centralized control console in this embodiment, it is first determined whether the operation instruction status of the same operation button on the centralized control console and the local console is consistent. If the operation instruction status is inconsistent, this operation button is automatically locked during the operation permission switch, and an alarm prompt is given on the HMI screen. After the operation permission is switched, when this operation button is operated again on the console with the operation permission, the locked state of this operation button will be automatically released. The control principle of this method is simple, which can ensure that the operation instructions do not change, and improves the safety and efficiency of the operation permission switching process.

[0034] Second Embodiment

[0035] This embodiment further illustrates the control method for switching the operation permission of the centralized control system of the present invention with a specific application example; specifically, this solution is implemented in the centralized control project of the 5000mm wide and thick plate production line in a steel plant. In this centralized control project of the wide and thick plate production line, 3 centralized control consoles are designed in the centralized control room to achieve centralized control of 11 local consoles. The following takes this centralized control project as an example to illustrate, and the implementation process is as follows:

[0036] S1. Perform the operation of switching the operation permission on the centralized control console;

[0037] S2. Determine whether the operation instruction status of the same operation button on the 3 centralized control consoles and the 11 local consoles is consistent;

[0038] S3. Lock the operation buttons on the centralized control console and the local console whose operation instruction status is inconsistent;

[0039] S4. When the currently locked operation button is operated on the console with the operation permission, if the operation instruction meets the preset conditions, the locked state of the currently locked operation button is automatically released; among them, for the locked operation button, all other operations except the operations that meet the preset conditions are invalid until its locked state is released.

[0040] After the operation permission switching of the centralized control console of this factory adopts the above control method, the operation permission switching between the local and centralized control consoles can be carried out quickly, without worrying about the abnormal operation of the equipment caused by the operation permission switching, and the efficiency and safety of the operation permission switching are improved.

[0041] In addition, it should be noted that the present invention can be provided as a method, device or computer program product. Therefore, the embodiments of the present invention can take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code.

[0042] Embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate means for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple blocks.

[0043] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple blocks. These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, such that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple blocks.

[0044] It should also be noted that in this document, the terms "including", "comprising", or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article, or terminal device including the said element.

[0045] Finally, it should be noted that the above description is the preferred embodiment of the present invention. It should be pointed out that although the preferred embodiments of the present invention have been described, for those skilled in the art of this technology, once the basic creative concept of the present invention is known, several improvements and refinements can be made without departing from the principle described in the present invention, and these improvements and refinements should also be regarded as the protection scope of the present invention. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

Claims

1. A control method for switching operation permissions of a centralized control system, the centralized control system includes an operation console and a PLC controller, the operation console includes a local operation console and a centralized control operation console, and both the local operation console and the centralized control operation console are connected to the PLC controller; the local operation console and the centralized control operation console have the same operation functions, and the operation permissions are divided into the operation permissions of the centralized control operation console and the operation permissions of the local operation console. Only one operation console can have operation permissions at the same time ； The PLC controller completes the control of the operation permission switching logic, and is characterized in that, The method includes: When performing an operation permission switching operation on the centralized control operation console, judge whether the operation instruction states of the same operation buttons on the centralized control operation console and the local operation console are consistent; When the operation instruction states of the same operation buttons on the centralized control operation console and the local operation console are inconsistent, lock the operation buttons with inconsistent operation instruction states on the centralized control operation console and the local operation console; when locking the operation buttons with inconsistent operation instruction states on the centralized control operation console and the local operation console, use the operation instructions of the operation buttons of the operation console with operation permissions before the operation permission switching as the reference to lock the operation buttons; When operating on the currently locked operation button on the operation console with operation permissions, if the operation instruction meets the preset conditions, the locked state of the currently locked operation button is automatically released; among them, for the operation buttons after locking, except for the operations that meet the preset conditions, all other operations on them are invalid until their locked state is released; the preset condition is: the operation instruction of the operation button of the operation console with operation permissions is the same as the locked instruction.

2. The control method for switching operation permissions of a centralized control system according to claim 1, characterized in that, The basis for judging whether the operation instruction states of the same operation buttons on the centralized control operation console and the local operation console are consistent is: if the given states of the operation instructions of the same operation buttons on the centralized control operation console and the local operation console are exactly the same, it is determined to be consistent; otherwise, it is determined to be inconsistent.

3. The control method for switching operation permissions of a centralized control system according to claim 1, characterized in that, When locking the operation buttons with inconsistent operation instruction states on the centralized control operation console and the local operation console, the method further includes: giving an alarm prompt for the locked operation buttons on the HMI human-machine interface.

4. The control method for switching operation permissions of a centralized control system according to claim 1, characterized in that, The switching of the operation permissions does not include the emergency stop button.

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