CN115562121A - Communication control circuit based on input/output module and communication equipment - Google Patents
Communication control circuit based on input/output module and communication equipment 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
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- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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Abstract
The application provides a communication control circuit and communication equipment based on input/output module. The communication control circuit comprises a data acquisition instrument, an input/output module, a controller and an analog switch; the input/output module is respectively connected with the data acquisition instrument and the controller, the input/output module is provided with at least one input/output channel on the side of the data acquisition instrument, the input/output module is connected with the data acquisition instrument through one input/output channel, and one input/output channel is provided with an analog switch; the controller is used for responding to the channel maintenance instruction, determining a target channel and sending an opening and closing signal to an analog switch of the target channel; and the analog switch is used for controlling an input/output channel between the input/output module and the corresponding data acquisition instrument to be opened and closed after receiving the opening and closing signal. Each channel is provided with an analog switch to realize independent control of each channel and ensure that other channels work normally when one channel is disconnected.
Description
Technical Field
The present disclosure relates to communication technologies, and in particular, to a communication control circuit and a communication device based on an input/output module.
Background
With the rapid development of the automation industry, field I/O (Input/Output) modules are increasingly used in the scenes of chemical plants and the like. The I/O module typically has 16 or more I/O channels for carrying out various signal transmissions.
In the prior art, when an I/O module is in operation, each channel is powered on to transmit signals. When a certain channel in the I/O module is in a maintenance state, the power-off control needs to be performed on the whole I/O module, which affects the normal operation of other channels, resulting in lower accuracy and efficiency of the communication control of the I/O module.
Disclosure of Invention
The application provides a communication control circuit and communication equipment based on input/output module for improve I/O module communication control's precision and efficiency.
In a first aspect, the present application provides a communication control circuit based on an input/output module, the communication control circuit including a data collection instrument, an input/output module, a controller and an analog switch;
the input/output module is respectively connected with the data acquisition instrument and the controller, at least one input/output channel is arranged on the side of the data acquisition instrument of the input/output module, the input/output module is connected with one data acquisition instrument through one input/output channel, and one input/output channel is provided with an analog switch;
the controller is used for responding to a channel maintenance instruction, determining a target channel and sending an opening and closing signal to an analog switch of the target channel;
and the analog switch is used for controlling an input/output channel between the input/output module and the corresponding data acquisition instrument to be opened and closed after receiving the opening and closing signal.
In a second aspect, the present application provides a communication device, wherein the communication device includes the communication control circuit based on the input/output module according to the first aspect of the present application.
The application provides a communication control circuit and communications facilities based on input/output module through set up analog switch on each IO passageway between input/output module and data acquisition instrument, realizes the control to each IO passageway. A user sends a channel maintenance instruction through the controller, determines a target channel to be controlled, and sends an opening and closing signal to the analog switch on the target channel, for example, a disconnection signal is sent to disconnect the target channel, the data acquisition instrument connected with the target channel cannot send a signal to the I/O module, and other channels can work normally. The problem that in the prior art, when a single channel is controlled, the whole I/O module needs to be powered off or powered on is solved, the influence on other channels is avoided, and the precision and the efficiency of communication control of the I/O module are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a communication control circuit based on an input/output module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a communication control circuit based on an input/output module according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a communication control circuit based on an input/output module according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a communication control circuit based on an input/output module according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. 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 application.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims.
In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
It should be noted that, for the sake of brevity, this description does not exhaust all alternative embodiments, and it should be understood by those skilled in the art after reading this description that any combination of features may constitute an alternative embodiment as long as the features are not mutually inconsistent. The following examples are described in detail.
With the rapid development of process industry automation, field I/O modules are increasingly used in chemical plants. These field I/O modules are deployed in explosion-proof areas on chemical sites and, therefore, require explosion-proof capabilities.
The explosion-proof modes used by the current I/O module mainly comprise 3 types, namely intrinsic safety type explosion-proof mode, sparkless type explosion-proof mode and increased safety type explosion-proof mode. The intrinsically safe explosion-proof equipment uses extremely low working voltage and relatively small working Current, for example, the voltage is not more than DC (Direct Current) 24V and the Current is not more than DC20mA during normal work; the voltage is not more than DC35V when the fault occurs, the current is not more than DC35mA, the energy of sparks generated in normal and fault conditions is not enough to ignite explosive mixtures, and therefore the device has the capability of carrying out live operation in dangerous places. However, the power supply energy is too small to meet the requirements of the field I/O module, so that the explosion-proof type product is limited.
The fireless flower type and safety-added type equipment is designed by a circuit, and under the normal working condition, sparks or dangerous temperature for igniting explosive mixtures can not be generated, so that the explosion prevention is realized. The two types of explosion-proof are mainly selected by the field I/O module products at present. However, since these two types of explosion protection can only ensure explosion protection during normal operation, the field I/O module does not have the capability of field maintenance when used in hazardous areas. The field I/O module generally has 16 or more I/O channels, and when a single channel needs to be reconnected and other maintenance operations, the entire module needs to be powered off, that is, the explosion-proof function cannot be realized, and the normal operation of other channel signals is affected. That is, the prior art does not enable undisturbed maintenance of the I/O modules.
The application provides a communication control circuit and communication equipment based on input/output module, aims at solving the above technical problems of the prior art.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a communication control circuit based on an input/output module according to an embodiment of the present application, and as shown in fig. 1, the communication control circuit 10 includes a data collection meter 101, an input/output module 102, a controller 103, and an analog switch 104.
The input/output module 102 is respectively connected with the data acquisition instrument 101 and the controller 103, the input/output module 102 is provided with at least one input/output channel at the data acquisition instrument 101 side, the input/output module 102 is connected with one data acquisition instrument 101 through one input/output channel, and one input/output channel is provided with an analog switch 104; the controller 103 is used for responding to the channel maintenance instruction, determining a target channel and sending an opening and closing signal to the analog switch 104 of the target channel; and the analog switch 104 is configured to control an input/output channel between the input/output module 102 and the corresponding data collection instrument 101 to be opened and closed after receiving the opening/closing signal.
For example, the data collection meter 101 may collect field data in real time or at regular time, and in this embodiment, the field data may be data of a chemical field of a chemical plant. For example, the chemical field may also deliver chemical products to a preset liquid pool, and the data collection instrument 101 may be a flow meter, a liquid level meter, or other devices. The data collection instrument 101 can monitor data such as flow rate and liquid level in the liquid pool in real time, and send the monitored data to the I/O module 102 through the I/O channel, that is, the data collection instrument 101 is connected with the I/O module 102. In this embodiment, the I/O channel is an input/output channel, and the I/O module 102 is an input/output module 102.
The controller 103 may be a computer or other like device, and the controller 103 is connected to the I/O module 102, and may receive signals transmitted by the I/O module 102 or may transmit signals to the I/O module 102. The user may also operate the controller 103 to control communication between the data collection meter 101 and the I/O module 102.
In this embodiment, the I/O module 102 may be a fireless type and safety-enhanced type device, that is, the I/O module 102 itself supports an explosion-proof capability of a fireless or safety-enhanced class. I/O module 102 supports multiple channels, which may be, for example, 8 channels, 16 channels, or more, etc. The I/O channels of the I/O module 102 support input and output of signals commonly used for industrial control, for example, the input or output data may include 4-20mA current, 0-20mA current, switching values, model values, and 1-10kHz frequency. The switching value may refer to a switching state of the on-site valve, and the analog value may include a flow rate or a liquid level.
The I/O module 102 may communicate with a controller 103 of the industrial control system, transmit a signal input from the data collection instrument 101 to the controller 103, and output a signal transmitted from the controller 103.
The I/O module 102 is provided with a plurality of I/O channels on the data collection instrument 101 side, i.e., the data collection instrument 101 may be connected to the I/O module 102 through the I/O channels. There may be multiple data collection meters 101, with each data collection meter 101 connected to one I/O channel. An analog switch 104 may be disposed on each I/O channel, and in this embodiment, the analog switch 104 may be a photo mos (photo coupler).
When maintenance is required for one or more I/O channels, a user may issue a channel maintenance command via the controller 103. The controller 103 determines, in response to the channel maintenance instruction, a channel indicated in the channel maintenance instruction, which needs to be maintained, as a target channel, and sends an open/close signal to the analog switch 104 of the target channel. The open/close signal may include an open signal transmitted when communication needs to be stopped or a close signal transmitted when communication needs to be performed. The high and low levels corresponding to the open and close signals may be preset, for example, the high level is an open signal, and the low level is a close signal. If the analog switch 104 receives the disconnection signal, the switch is disconnected, that is, the communication between the data collection instrument 101 and the I/O module 102 on the target channel is disconnected; if the analog switch 104 receives a close signal, the switch is closed, that is, the data collection meter 101 on the target channel can communicate with the I/O module 102. The independent control of each I/O channel is realized, and the precise control of the field production process is facilitated.
In this embodiment, the controller 103 is configured to determine a channel identifier from a channel maintenance instruction in response to the channel maintenance instruction; determining a channel corresponding to the channel identifier in the channel maintenance instruction as a target channel according to the association relationship between the preset channel and the channel identifier; the open/close signal in the channel maintenance instruction is sent to the analog switch 104 of the target channel.
Specifically, each I/O channel corresponds to a unique channel identifier, and the association relationship between the channel and the channel identifier is stored in the controller 103 in advance. The channel maintenance instruction may include a channel identifier of the channel to be maintained. And after responding to the channel maintenance instruction, determining a channel identifier from the channel maintenance instruction, and determining a channel corresponding to the channel identifier in the channel maintenance instruction as a target channel according to a preset association relationship between the channel and the channel identifier. Each I/O channel is provided with an analog switch 104, determines the analog switch 104 on the target channel, and sends an on/off signal to the analog switch 104 on the target channel. If the channel maintenance instruction is an instruction for requiring the analog switch 104 to be disconnected, a disconnection signal is sent; if the channel maintenance command is a command requiring the analog switch 104 to be closed, a close signal is sent.
The beneficial effect that sets up like this is that can confirm the target passageway that treats maintenance through controller 103 to send the switching signal to analog switch 104 on the target passageway, need not to cut off the power supply to whole IO module 102, reduce the influence to other normally working passageways, avoid the unable transmission signal of normally working passageway, improve communication control's efficiency and precision.
According to the communication control circuit based on the input/output module, the analog switches are arranged on the I/O channels between the input/output module and the data acquisition instrument, and control over the I/O channels is achieved. A user sends a channel maintenance instruction through the controller, determines a target channel to be controlled, and sends an on-off signal to an analog switch on the target channel, for example, a disconnection signal is sent to disconnect the target channel, a data acquisition instrument connected with the target channel cannot send a signal to the I/O module, and other channels can work normally. The problem that in the prior art, when a single channel is controlled, the whole I/O module needs to be powered off or powered on is solved, the influence on other channels is avoided, and the precision and the efficiency of communication control of the I/O module are improved.
Fig. 2 is a schematic structural diagram of a communication control circuit based on an input/output module according to an embodiment of the present disclosure, and as shown in fig. 2, the input/output module 102 further includes a channel enable control unit 1021.
The channel enable control unit 1021 is respectively connected with the controller 103 and each analog switch 104; a channel enable control unit 1021 for receiving the open/close signal sent by the controller 103 and sending the open/close signal to the analog switch 104 of the target channel; wherein, the opening and closing signal is a level signal.
Illustratively, the channel enable control unit 1021 is connected to the controller 103, and can receive the open/close signal sent by the controller 103. The channel enable control unit 1021 is also connected to the analog switches 104 on the respective I/O channels, and transmits the open/close signal to the analog switches 104 on the target channels. That is, the channel enable control unit 1021 can transmit high and low level signals to control the analog switches 104 in a targeted manner.
The I/O module 102 may further include a microprocessor chip, which may be an MCU (micro controller Unit). The MCU may be connected between the channel enable control unit 1021 and the controller 103, and the MCU may be connected to the controller 103 through a predetermined communication circuit, and the controller 103 transmits an on/off signal to the channel enable control unit 1021 through the MCU. The channel enable control unit 1021 may also be connected with a redundant circuit, which may be a backup circuit for the I/O module 102, and may be enabled when the I/O module fails.
According to the communication control circuit based on the input/output module, the analog switches are arranged on the I/O channels between the input/output module and the data acquisition instrument, and control over the I/O channels is achieved. A user sends a channel maintenance instruction through the controller, determines a target channel to be controlled, and sends an opening and closing signal to the analog switch on the target channel, for example, a disconnection signal is sent to disconnect the target channel, the data acquisition instrument connected with the target channel cannot send a signal to the I/O module, and other channels can work normally. The problem that in the prior art, when a single channel is controlled, the whole I/O module needs to be powered off or powered on is solved, the influence on other channels is avoided, and the precision and the efficiency of communication control of the I/O module are improved.
Fig. 3 is a schematic structural diagram of a communication control circuit based on an input/output module according to an embodiment of the present application, and as shown in fig. 3, the input/output module 102 further includes a signal conversion unit 1022.
A data acquisition instrument 101 is connected with a signal conversion unit 1022 through an input/output channel, and the signal conversion unit 1022 is connected with the controller 103; the signal conversion unit 1022 is configured to receive the signal transmitted by the data collection instrument 101, convert the signal, and send the converted signal to the controller 103 as an input signal.
Illustratively, there may be a plurality of data collection meters 101, there may be a plurality of I/O channels, and one I/O channel may be connected to one data collection meter 101. The I/O module 102 may include a plurality of signal conversion units 1022, and one I/O channel may connect one signal conversion unit 1022, that is, one data collection meter 101 and one signal conversion unit 1022 are connected through one I/O channel. The signal conversion unit 1022 may also be connected to the controller 103. The signal conversion unit 1022 may receive the signal transmitted by the data collection meter 101 and convert the signal, for example, an analog signal may be converted into a digital signal, or a digital signal may be converted into an analog signal. The converted signal is sent to the controller 103 as an input signal to the controller 103. For example, the data collection meter 101 is a flow meter, the flow meter sends the collected flow value to the signal conversion unit 1022 in the form of an analog signal, and the signal conversion unit 1022 converts the analog signal into a digital signal and sends the digital signal to the controller 103 for processing by the controller 103.
In this embodiment, the signal conversion unit 1022 includes an Analog-to-Digital (a/D) conversion unit and/or a Digital-to-Analog (D/C) conversion unit.
In this embodiment, the communication control circuit 10 further includes an actuator; the actuator is connected with the input/output module 102; the controller 103 is configured to process an input signal and send the processed signal to the input/output module 102 as an output signal; and the input and output module 102 is used for receiving the output signal and sending the output signal to the actuator.
Specifically, the actuator is a device for performing production on site, for example, the actuator may be a switch gate of a liquid pool, and the actuator may open or close the gate to control the chemical product to flow to the liquid pool. After obtaining the input signal, the controller 103 may process the input signal according to a preset data processing logic, and determine the processed signal as an output signal. For example, the input data is used for representing a liquid level value in the liquid pool, and the preset data processing logic is that the liquid level value represented by the input signal is compared with a preset liquid level threshold, if the liquid level value is equal to or greater than the preset liquid level threshold, an output signal for closing the gate is sent out, and if the liquid level value is less than the preset liquid level threshold, an output signal for opening the gate is sent out.
The controller 103 outputs the output signal to the I/O module 102, the I/O module 102 sends the output signal to the actuator, and the actuator controls the production process on the spot according to the output signal.
The beneficial effect of the arrangement is that the input signal can be fed back by the controller 103, the actuator controls the field, the closed loop of the communication process is realized, and the field is automatically controlled according to the data acquired by the data acquisition instrument 101.
In this embodiment, the signal conversion unit 1022 is configured to receive the output signal, process the output signal, and send the processed output signal to the actuator.
Specifically, the output signal sent by the controller 103 may be received by a signal conversion unit 1022 in the I/O module 102, and the output signal is processed by the signal conversion unit 1022, for example, a digital signal may be converted into an analog signal. The signal conversion unit 1022 sends the converted output signal to the actuator, and the actuator controls the execution of the field production process according to the converted output signal.
The signal conversion unit 1022 converts the output signal, so that the actuator can receive the converted output signal, thereby facilitating the operation of the actuator.
According to the communication control circuit based on the input/output module, the analog switches are arranged on the I/O channels between the input/output module and the data acquisition instrument, and control over the I/O channels is achieved. A user sends a channel maintenance instruction through the controller, determines a target channel to be controlled, and sends an opening and closing signal to the analog switch on the target channel, for example, a disconnection signal is sent to disconnect the target channel, the data acquisition instrument connected with the target channel cannot send a signal to the I/O module, and other channels can work normally. The problem of among the prior art, when controlling single passageway, need to cut off the power supply or the circular telegram to whole IO module, avoid the influence to other passageways, improve the precision and the efficiency to IO module communication control.
Fig. 4 is a schematic structural diagram of a communication control circuit based on an input/output module according to an embodiment of the present application, and as shown in fig. 4, the communication control circuit 10 further includes a power supply 105.
And the power supply 105 is connected with the input and output module 102 and is used for supplying power to the input and output module 102.
Illustratively, the power supply 105 portion may employ a 24V to 5V isolated DC/DC (Direct Current to Direct Current) power supply to supply power to the channel portion of the remote I/O module 102. The input to the power supply 105 may be 24V DC, which may be provided by the computer device in which the controller resides. The Output may be 5V, which provides working power for the I/O module 102, and provides power for channels such as AI (Analog Input), AO (Analog Output), DI (Digital Input), and DO (Digital Output) to supply power to the outside.
In this embodiment, the I/O channel is cut off by adding an analog switch or an optical relay to the input/output module 102 on the side close to the data collection meter 101. When the I/O channel is used normally, the MCU1023 controls the analog switch 104 to be in a closed state, and the signal can pass normally. When one of the I/O channels is determined to be turned off, the MCU1023 sends a signal to set the analog switch 104 to be in an off state, at this time, the internal circuit of the I/O module 102 can be isolated from the external data acquisition instrument 101, the positive end and the negative end of the I/O channel are both in a high-impedance state, and no voltage exists between the positive end and the power supply 105 and the grounding end, so that an explosion-proof effect can be achieved.
To ensure the isolation effect of the analog switch 104, the analog switch 104 is generally not connected to a circuit with a power supply, and the analog switch 104 can be connected to a passive device for protection. The passive devices may be connected in series with the analog switch 104 on the I/O channel or may be connected outside the I/O channel. For example, a capacitor, a resistor, and the like may be connected.
To ensure that the I/O module 102 can be used in hazardous areas of a chemical plant site, the design of the I/O module 102 itself should meet the design of an increased safety or sparkless type device.
When any I/O channel of the field I/O module 102 needs to be changed, the data acquisition instrument 101 connected to the I/O channel can be changed to obtain a new signal, and the signal on the I/O channel with the fault can be accessed to other I/O channels.
According to the communication control circuit based on the input/output module, the analog switches are arranged on the I/O channels between the input/output module and the data acquisition instrument, and control over the I/O channels is achieved. A user sends a channel maintenance instruction through the controller, determines a target channel to be controlled, and sends an opening and closing signal to the analog switch on the target channel, for example, a disconnection signal is sent to disconnect the target channel, the data acquisition instrument connected with the target channel cannot send a signal to the I/O module, and other channels can work normally. The problem that in the prior art, when a single channel is controlled, the whole I/O module needs to be powered off or powered on is solved, the influence on other channels is avoided, and the precision and the efficiency of communication control of the I/O module are improved.
The application also discloses a communication device, wherein the communication device is provided with the communication control circuit based on the input/output module as described in any embodiment of the application. The communication device is provided with an analog switch 104 and an I/O module 102, the data collection instrument 101 and the controller 103 may be devices independent from the communication device, and the communication device may be connected to the data collection instrument 101 and the controller 103, respectively.
A non-transitory computer-readable storage medium, in which instructions, when executed by a controller of a terminal device, enable the terminal device to execute an input-output module-based communication control method of the terminal device.
The application also discloses a computer program product comprising a computer program which, when executed by the controller, realizes determining a target channel in response to a channel maintenance instruction, and sending an on-off signal to an analog switch of the target channel.
Program code for implementing the methods of the present application may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or electronic device.
To provide for interaction with a user, the controller described herein may be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user may provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The methods described herein may be implemented in a computing system that includes a back-end component (e.g., as a data electronic device), or that includes a middleware component (e.g., an application electronic device), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described herein), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the Internet.
The computer system may include a client and an electronic device. The client and the electronic device are generally remote from each other and typically interact through a communication network. The relationship of client and electronic device arises by virtue of computer programs running on the respective computers and having a client-electronic device relationship to each other. The electronic device may be a cloud electronic device, which is also called a cloud computing electronic device or a cloud host, and is a host product in a cloud computing service system, so as to solve the defects of high management difficulty and weak service extensibility in a traditional physical host and a VPS service ("Virtual Private Server", or "VPS" for short). The electronic device may also be a distributed system of electronic devices or an electronic device incorporating a blockchain. It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present application may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present application can be achieved, and the present invention is not limited herein.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A communication control circuit based on an input/output module is characterized by comprising a data acquisition instrument, the input/output module, a controller and an analog switch;
the input/output module is respectively connected with the data acquisition instrument and the controller, the input/output module is provided with at least one input/output channel at the side of the data acquisition instrument, the input/output module is connected with one data acquisition instrument through one input/output channel, and one input/output channel is provided with an analog switch;
the controller is used for responding to a channel maintenance instruction, determining a target channel and sending an opening and closing signal to an analog switch of the target channel;
and the analog switch is used for controlling an input/output channel between the input/output module and the corresponding data acquisition instrument to be opened and closed after receiving the opening and closing signal.
2. The communication control circuit of claim 1, wherein the input-output module further comprises a channel enable control unit;
the channel enabling control unit is respectively connected with the controller and each analog switch;
the channel enabling control unit is used for receiving the opening and closing signal sent by the controller and sending the opening and closing signal to the analog switch of the target channel; wherein, the switching signal is a level signal.
3. The communication control circuit according to claim 1, wherein the input-output module further includes a signal conversion unit;
a data acquisition instrument is connected with a signal conversion unit through an input/output channel, and the signal conversion unit is connected with the controller;
and the signal conversion unit is used for receiving the signal transmitted by the data acquisition instrument, converting the signal and sending the converted signal to the controller as an input signal.
4. The communication control circuit of claim 3, further comprising an actuator;
the actuator is connected with the input and output module;
the controller is used for processing the input signal and sending the processed signal to the input and output module as an output signal;
and the input and output module is used for receiving the output signal and sending the output signal to the actuator.
5. The communication control circuit of claim 4, wherein the signal conversion unit is configured to receive the output signal, process the output signal, and send the processed output signal to the actuator.
6. The communication control circuit according to claim 3, wherein the signal conversion unit comprises an analog-to-digital conversion unit and/or a digital-to-analog conversion unit.
7. The communication control circuit of claim 1, wherein the analog switch is a photo coupler.
8. The communication control circuit of claim 1, further comprising a power supply;
the power supply is connected with the input and output module and used for supplying power to the input and output module.
9. The communication control circuit of claim 1, wherein the controller is configured to determine a channel identifier from a channel maintenance instruction in response to the channel maintenance instruction; determining a channel corresponding to the channel identifier in the channel maintenance instruction as a target channel according to a preset incidence relation between the channel and the channel identifier; and sending the opening and closing signal in the channel maintenance instruction to the analog switch of the target channel.
10. A communication device, characterized in that the communication device comprises a communication control circuit based on an input-output module according to any one of claims 1-9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116388760A (en) * | 2023-06-06 | 2023-07-04 | 上海泰矽微电子有限公司 | Static performance testing device and method for differential input ADC |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116388760A (en) * | 2023-06-06 | 2023-07-04 | 上海泰矽微电子有限公司 | Static performance testing device and method for differential input ADC |
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