CN109445337B - Port protection circuit and control method, control circuit, device and system thereof - Google Patents
Port protection circuit and control method, control circuit, device and system thereof Download PDFInfo
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- CN109445337B CN109445337B CN201811285133.2A CN201811285133A CN109445337B CN 109445337 B CN109445337 B CN 109445337B CN 201811285133 A CN201811285133 A CN 201811285133A CN 109445337 B CN109445337 B CN 109445337B
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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
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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Abstract
The invention discloses a port protection circuit and a control method, a control circuit, a device and a system thereof. The port protection circuit is arranged in the control device, and the port protection circuit is arranged between the control circuit and the input/output port of the control device; and the port protection circuit is used for cutting off the line connection between the control circuit and the input/output port under the condition that the control device receives a port configuration command of the central processing unit. The invention ensures that the line connection between the control device and the controlled equipment is completely disconnected in the process of port configuration by adding the port protection method and the port protection circuit in the control device, thereby realizing the protection of the interface of the control device or the controlled equipment and the internal control circuit of the device or the equipment.
Description
Technical Field
The present invention relates to the field of port configuration, and in particular, to a port protection circuit, a control method thereof, a control circuit, a device, and a system.
Background
Devices for various automatic controls, such as a PLC (Programmable Logic Controller), a DDC (Direct Digital Control), and the like, are rapidly spreading, such Control devices are mainly used for centralized Control of various large machines or complex devices, and the Control devices themselves integrate various types of input and output interfaces, including a Digital input and output interface and an analog input and output interface, where the analog input and output interface includes a voltage input and output interface, a current input and output interface, a temperature sensing package detection interface, and the like.
Disclosure of Invention
The applicant found that: because different types of interfaces have different corresponding internal implementation circuits, the parameter requirements for input and output signals are different, and the matching problem between the input and output signals and the interfaces needs to be particularly concerned when the interfaces are used, otherwise, the control device or the controlled equipment is easily damaged. The conventional way of using the control device in the related art is that an engineer firstly verifies and confirms the signal type and parameters output or required to be input by the external controlled equipment, then configures the corresponding port of the control device to match with the signal type and parameters, and finally connects the input/output interface between the two modules. When the port signal type or parameters need to be changed, the signal output of the controlled equipment or the signal output of the control device needs to be stopped, then the corresponding input/output interface is cut off, and after the control device is reconfigured, the input/output interface between the two modules is connected.
The applicant found that: in practical applications, an operator may forget to switch off the input/output interface and directly configure the control device, or an engineer may perform a wrong operation in the process of configuring the port type of the control device, so that the input/output signals and the port type may not be matched, resulting in a risk of damage to the control device or the controlled device.
In view of the above technical problems, the present invention provides a port protection circuit, a control method thereof, a control circuit, a device and a system, which can ensure that a line connection between a control device and a controlled device is completely disconnected during a port configuration process.
According to an aspect of the present invention, there is provided a port protection circuit, wherein the port protection circuit is provided in a control apparatus, the port protection circuit being provided between a control circuit and an input-output port of the control apparatus;
and the port protection circuit is used for cutting off the line connection between the control circuit and the input/output port under the condition that the control device receives a port configuration command of the central processing unit.
In some embodiments of the present invention, the port protection circuit is further configured to switch on the line connection between the control circuit and the external interface after the port configuration operation of the control device is completed.
In some embodiments of the invention, the port protection circuit comprises a switching device, wherein:
the control device controls the on-off of the circuit between the control circuit and the input/output port by controlling the on-off of the switch device.
In some embodiments of the invention, the switching device is turned on in accordance with a turn-on control signal sent by the control circuit; and is disconnected according to a disconnection control signal sent by the control circuit.
According to another aspect of the present invention, there is provided a port protection circuit control method including:
and under the condition of receiving a port configuration command of the central processing unit, sending an opening control signal to a port protection circuit to open the port protection circuit between the control circuit and the input/output port, wherein the port protection circuit is arranged in the control device, and the port protection circuit is arranged between the control circuit and the input/output port of the control device.
In some embodiments of the present invention, the port protection circuit control method further includes:
detecting whether a port protection circuit is disconnected;
in the case where the port protection circuit is disconnected, a port configuration operation of the control device is performed.
In some embodiments of the present invention, the port protection circuit control method further includes:
after the port configuration operation of the control device is completed, a connection control signal is sent to the port protection circuit to connect the port protection circuit between the control circuit and the input/output port.
According to another aspect of the present invention, there is provided a control circuit comprising:
the configuration command receiving module is used for receiving a port configuration command sent by the central processing unit;
and the control module is used for sending a disconnection control signal to the port protection circuit to disconnect the port protection circuit between the control circuit and the input/output port under the condition that the configuration command receiving module receives a port configuration command of the central processing unit, wherein the port protection circuit is arranged in the control device, and the port protection circuit is arranged between the control circuit and the input/output port of the control device.
In some embodiments of the invention, the control circuit is configured to perform operations for implementing the port protection circuit control method according to any of the embodiments described above.
According to another aspect of the present invention, there is provided a control circuit comprising:
a memory to store instructions;
a processor configured to execute the instructions to cause the control circuit to perform operations to implement the port protection circuit control method according to any of the above embodiments.
According to another aspect of the present invention, there is provided a control device comprising an input/output port, a port protection circuit as described in any of the above embodiments, and a control circuit as described in any of the above embodiments.
According to another aspect of the present invention, there is provided a control system comprising a central processing unit and a control circuit as described in any of the above embodiments.
According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions which, when executed by a processor, implement a port protection circuit control method according to any one of the above embodiments.
The invention ensures that the line connection between the control device and the controlled equipment is completely disconnected in the process of port configuration by adding the port protection method and the port protection circuit in the control device, thereby realizing the protection of the interface of the control device or the controlled equipment and the internal control circuit of the device or the equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of some embodiments of a related art control system.
FIG. 2 is a schematic diagram of some embodiments of the control system of the present invention.
Fig. 3 is a schematic diagram of some embodiments of a port protection circuit of the present invention.
Fig. 4 is a schematic diagram of some embodiments of a port protection circuit control method according to the invention.
FIG. 5 is a schematic diagram of some embodiments of control circuits of the present invention.
FIG. 6 is a schematic diagram of another embodiment of a control circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
FIG. 1 is a schematic diagram of some embodiments of a related art control system. As shown in fig. 1, the control system includes a central processor 1 and a control device 2, wherein:
the central processing unit 1 is connected with a control device 2, and the control device 2 is connected with a controlled device 3.
The control device 2 includes a control circuit 21 and an input-output port (I/O port) 22, in which:
the control device 2 receives control information of the central processing unit 1 through communication signals. The control device 2 then configures the corresponding I/O port 22 to a corresponding mode, which may be a voltage input/output or a current input/output, and finally connects to the controlled device 3 through the I/O port 22.
The applicant found that: the conventional way of using the control device in the related art is that an engineer firstly verifies and confirms the signal type and parameters output or required to be input by the external controlled equipment, then configures the corresponding port of the control device to match with the signal type and parameters, and finally connects the input/output interface between the two modules. When the port signal type or parameters need to be changed, the signal output of the controlled equipment or the signal output of the control device needs to be stopped, then the corresponding input/output interface is cut off, and after the control device is reconfigured, the input/output interface between the two modules is connected.
The applicant found that: in practical applications, an operator may forget to switch off the input/output interface and directly configure the control device, or an engineer may perform a wrong operation in the process of configuring the port type of the control device, so that the input/output signals and the port type may not be matched, resulting in a risk of damage to the control device or the controlled device.
FIG. 2 is a schematic diagram of some embodiments of the control system of the present invention. As shown in fig. 2, the control system includes a central processor 1 and a control device 2, wherein:
the central processing unit 1 is connected with a control device 2, and the control device 2 is connected with a controlled device 3.
The control device 2 includes a control circuit 21, a port protection circuit 23, and an input-output port (I/O port) 22, in which:
the port protection circuit 23 is provided in the control device 2, and is provided between the control circuit 21 and the input/output port 22 of the control device.
The port protection circuit 23 is configured to disconnect a line connection between the control circuit 21 and the input/output port 22 when the control device 2 receives a port configuration command from the central processing unit 1.
In some embodiments of the present invention, the port protection circuit 23 may be further configured to switch on the line connection between the control circuit and the external interface after the port configuration operation of the control device is completed.
When the control device 2 receives a configuration command of the central processing unit 1, the control device 2 firstly sends a control instruction to the port protection circuit, so as to cut off the line connection between the internal circuit and the external interface, wherein the configuration command comprises: opening a port and configuring the port in one state, or changing the port from one configuration to another configuration; then, executing interface configuration operation; after the control device completes the port configuration, the port protection circuit is controlled to be connected with the line connection between the internal circuit and the external interface, and the line connection between the control device and the controlled equipment is completely disconnected in the process of port configuration of the control device, so that the interface of the control device or the controlled equipment and the internal circuit of the device or the equipment are protected.
The control system provided based on the above embodiment of the present invention is an automatic control system, in which a port protection circuit is newly added in a control device, and a port protection program is newly added in the control circuit, so that it can be ensured that the line connection between the control device and the controlled device is completely disconnected during the port configuration process of the control device, thereby protecting the interface of the control device or the controlled device and the internal control circuit of the device or the device.
The above embodiments of the present invention provide a protection mechanism for an I/O port of an automation control device, which can protect a control device or a controlled device during a port configuration process. Therefore, the embodiment of the invention can solve the safety problem possibly caused by mismatching of input/output signals and interface types or the damage problem caused by different configuration settings of the port in the port configuration process of the control device.
Fig. 3 is a schematic diagram of some embodiments of a port protection circuit of the present invention. As shown in fig. 3, a port protection circuit of the present invention (e.g., the port protection circuit 22 of the embodiment of fig. 2) may include a switching device 231 and a capacitor C1, wherein:
the control device controls the on-off of the line between the control circuit and the input/output port by controlling the on-off of the switching device 231.
In some embodiments of the present invention, the switching device 231 may be configured to be turned on according to a turn-on control signal sent by the control circuit; and is disconnected according to a disconnection control signal sent by the control circuit.
In some embodiments of the present invention, the switching device 231 in the embodiment of fig. 3 may be implemented as a relay, a parametric analog switch, or the like.
The port protection circuit provided based on the above embodiment of the present invention is disposed between the control circuit and the input/output port of the control device, and is configured to cut off the line connection between the control circuit and the input/output port when the control device receives a port configuration command of the central processing unit, so as to ensure that the line connection between the control device and the controlled device is completely disconnected during the port configuration process of the control device, thereby protecting the interface of the control device or the controlled device and the internal control circuit of the device or the device.
The above embodiments of the present invention provide a protection mechanism for an I/O port of an automation control device, which can protect a control device or a controlled device during a port configuration process. Therefore, the embodiment of the invention can solve the safety problem possibly caused by mismatching of input/output signals and interface types or the damage problem caused by different configuration settings of the port in the port configuration process of the control device.
Fig. 4 is a schematic diagram of some embodiments of a port protection circuit control method according to the invention. Preferably, this embodiment can be implemented by a control circuit of the present invention (e.g., the control circuit 21 of the embodiment of fig. 2 or fig. 3). The method comprises the following steps:
In some embodiments of the present invention, the port configuration command may include opening a port and configuring it into one state, changing a port from one configuration to another, and so on.
And 42, under the condition that the control circuit receives a port configuration command of the central processing unit, sending a disconnection control signal to a port protection circuit to disconnect the port protection circuit between the control circuit and the input/output port, wherein the port protection circuit is arranged in the control device, and the port protection circuit is arranged between the control circuit of the control device and the input/output port.
And 44, the control circuit performs the port configuration operation of the control device under the condition that the port protection circuit is disconnected.
In some embodiments of the invention, the port configuration operation of the control device may include: the switching of the sub-circuits inside the control circuit is performed to ensure that the control circuit realizes the switching of different functional circuits (such as current input and output and voltage input and output) so as to realize the port configuration.
And step 45, after the port configuration operation of the control device is completed, the control circuit sends a connection control signal to the port protection circuit so as to connect the port protection circuit between the control circuit and the input/output port.
And step 46, the control circuit detects whether the port protection circuit is closed, and under the condition that the port protection circuit is closed, the control flow of the port protection circuit is ended. The matching between the control circuit 21 and the input/output interface 22 is completed, and the device signal transmission is possible.
Based on the port protection circuit control method provided by the above embodiment of the present invention, a port protection circuit is newly added in the control device, and a port protection program is newly added in the control circuit, so that it can be ensured that the line connection between the control device and the controlled device is completely disconnected during the port configuration process of the control device, thereby protecting the interface of the control device or the controlled device and the internal control circuit of the device or the device.
The above embodiments of the present invention provide a protection mechanism for an I/O port of an automation control device, which can protect a control device or a controlled device during a port configuration process. Therefore, the embodiment of the invention can solve the safety problem possibly caused by mismatching of input/output signals and interface types or the damage problem caused by different configuration settings of the port in the port configuration process of the control device.
FIG. 5 is a schematic diagram of some embodiments of control circuits of the present invention. As shown in fig. 5, the control circuit of the present invention (e.g., the control circuit of the embodiment of fig. 2 or fig. 3) may include a configuration command receiving module 51 and a control module 52, wherein:
a configuration command receiving module 51, configured to receive a port configuration command sent by the central processing unit;
and a control module 52, configured to send an open control signal to a port protection circuit to open a port protection circuit between the control circuit and the input/output port when the configuration command receiving module receives a port configuration command of the central processing unit, where the port protection circuit is disposed in the control device, and the port protection circuit is disposed between the control circuit and the input/output port of the control device.
In some embodiments of the present invention, the control circuit is configured to perform operations for implementing the port protection circuit control method according to any of the embodiments (for example, the embodiment of fig. 4) described above.
In some embodiments of the present invention, the control module 52 may also be used to detect whether the port protection circuit is open; in the case where the port protection circuit is disconnected, a port configuration operation of the control device is performed.
In some embodiments of the present invention, the control module 52 may be further configured to send a switch-on control signal to the port protection circuit to switch on the port protection circuit between the control circuit and the input/output port after the port configuration operation of the control device is completed.
Based on the control circuit provided in the above embodiment of the present invention, a port protection circuit is newly added in the control device, and a port protection program is newly added in the control circuit, so that it can be ensured that the line connection between the control device and the controlled device is completely disconnected during the port configuration process of the control device, thereby protecting the interface of the control device or the controlled device and the internal control circuit of the device or the device.
FIG. 6 is a schematic diagram of another embodiment of a control circuit of the present invention. As shown in fig. 6, a control circuit of the present invention (e.g., the control circuit of the embodiment of fig. 2 or fig. 3) may include a memory 61 and a processor 62, wherein:
a memory 61 for storing instructions;
a processor 62 configured to execute the instructions, so that the control circuit performs the operations of implementing the port protection circuit control method according to any of the embodiments (for example, the embodiment of fig. 4) described above.
The above embodiments of the present invention provide a protection mechanism for an I/O port of an automation control device, which can protect a control device or a controlled device during a port configuration process. Therefore, the embodiment of the invention can solve the safety problem possibly caused by mismatching of input/output signals and interface types or the damage problem caused by different configuration settings of the port in the port configuration process of the control device.
According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions which, when executed by a processor, implement a port protection circuit control method according to any one of the above embodiments.
Based on the computer-readable storage medium provided in the above embodiment of the present invention, a port protection program is newly added in the control circuit, so that it can be ensured that the line connection between the control device and the controlled device is completely disconnected during the port configuration process of the control device, thereby protecting the interface of the control device or the controlled device and the internal control circuit of the device or the device.
The above embodiments of the present invention provide a protection mechanism for an I/O port of an automation control device, which can protect a control device or a controlled device during a port configuration process. Therefore, the embodiment of the invention can solve the safety problem possibly caused by mismatching of input/output signals and interface types or the damage problem caused by different configuration settings of the port in the port configuration process of the control device.
The control circuitry described above may be implemented as a general purpose processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof, for performing the functions described herein.
Thus far, the present invention has been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (10)
1. A port protection circuit, characterized in that,
the port protection circuit is arranged in the control device, the port protection circuit is arranged between the control circuit and the input/output port of the control device, the central processing unit is connected with the control device, the control device is connected with the controlled equipment, and the control device comprises the control circuit, the port protection circuit and the input/output port;
the port protection circuit is used for cutting off the line connection between the control circuit and the input/output port under the condition that the control device receives a port configuration command of the central processing unit;
the control circuit is used for detecting whether the port protection circuit is disconnected or not; under the condition that the port protection circuit is disconnected, carrying out port configuration operation of the control device; after the port configuration operation of the control device is completed, the line connection between the control circuit and the external interface is switched on.
2. The port protection circuit of claim 1, comprising a switching device, wherein:
the control device controls the on-off of the circuit between the control circuit and the input/output port by controlling the on-off of the switch device.
3. Port protection circuit according to claim 1 or 2,
the switching device is switched on according to a switching-on control signal sent by the control circuit; and is disconnected according to a disconnection control signal sent by the control circuit.
4. A method for controlling a port protection circuit, comprising:
the control circuit receives a port configuration command sent by the central processing unit;
the control circuit sends a disconnection control signal to the port protection circuit to disconnect the port protection circuit between the control circuit and the input/output port under the condition that a port configuration command of the central processing unit is received, wherein the port protection circuit is arranged in the control device, the port protection circuit is arranged between the control circuit and the input/output port of the control device, the central processing unit is connected with the control device, the control device is connected with controlled equipment, and the control device comprises the control circuit, the port protection circuit and the input/output port;
wherein, the port protection circuit control method further comprises:
the control circuit detects whether the port protection circuit is disconnected;
the control circuit performs port configuration operation of the control device under the condition that the port protection circuit is disconnected;
the control circuit sends a connection control signal to the port protection circuit after the port configuration operation of the control device is completed, so as to connect the port protection circuit between the control circuit and the input/output port.
5. A control circuit, comprising:
the configuration command receiving module is used for receiving a port configuration command sent by the central processing unit;
the control module is used for sending a disconnection control signal to the port protection circuit to disconnect the port protection circuit between the control circuit and the input/output port under the condition that the configuration command receiving module receives a port configuration command of the central processing unit, wherein the port protection circuit is arranged in the control device, the port protection circuit is arranged between the control circuit and the input/output port of the control device, the central processing unit is connected with the control device, the control device is connected with controlled equipment, and the control device comprises the control circuit, the port protection circuit and the input/output port;
the control circuit is used for detecting whether the port protection circuit is disconnected or not; under the condition that the port protection circuit is disconnected, carrying out port configuration operation of the control device; after the port configuration operation of the control device is completed, the line connection between the control circuit and the external interface is switched on.
6. The control circuit according to claim 5, wherein the control circuit is configured to perform operations for implementing the port protection circuit control method according to claim 4.
7. A control circuit, comprising:
a memory to store instructions;
a processor for executing the instructions to cause the control circuit to perform operations to implement the port protection circuit control method of claim 4.
8. A control device comprising an input output port, a port protection circuit as claimed in any one of claims 1 to 3, and a control circuit as claimed in any one of claims 5 to 7.
9. A control system comprising a central processor and the control circuit of claim 8.
10. A computer-readable storage medium storing computer instructions which, when executed by a processor, implement the port protection circuit control method of claim 4.
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| CN201811285133.2A CN109445337B (en) | 2018-10-31 | 2018-10-31 | Port protection circuit and control method, control circuit, device and system thereof |
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| CN201811285133.2A CN109445337B (en) | 2018-10-31 | 2018-10-31 | Port protection circuit and control method, control circuit, device and system thereof |
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| CN109445337A (en) | 2019-03-08 |
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