Connecting line multiplexing method for industrial control

Abstract

The invention discloses a connecting line multiplexing method for industrial control, and relates to the technical field of industrial control, and the method specifically comprises the following steps: 1, laying a lead segment signal; comprising the following steps: arranging a control port, arranging a singlechip application interface and arranging a connecting line C; step 2, completing signal transmission for a control port and a single-chip microcomputer application interface based on time division multiplexing; according to the connecting line multiplexing method for industrial control provided by the invention, time-sharing, efficient and low-cost industrial control signal processing and transmission are realized through the design of a circuit structure and a signal transmission mode.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial control, and in particular to a method for multiplexing connecting lines for industrial control. Background Art

[0002] In modern industrial control systems, the connection between the control end and the execution end of the equipment is the key to achieve effective control. The traditional connection method faces many problems, such as Figure 1 As shown. First, from the perspective of physical IO interfaces, there are a large number of physical IO interfaces under traditional connection methods. When the industrial control system is expanded, the hardware cost will increase sharply. Every time a device or functional module is added, the physical IO interface needs to be increased accordingly, which not only means more hardware investment, but also these interfaces require special wiring. A large number of interfaces makes the wiring extremely complicated, and the lines are crisscrossed, which brings huge challenges to the wiring work and increases the difficulty of later maintenance. Secondly, in the traditional industrial field environment, the interfaces of devices such as sensors and actuators are usually independently configured and connected. This independent configuration connection method requires operators to carefully distinguish the functions of each port, which is a very cumbersome process. Since the interface function of each device needs to be confirmed separately, this inevitably leads to further increase in the complexity of wiring. Moreover, in actual operation, this connection method often causes a waste of resources. For example, in some cases, some ports may not be fully utilized in a specific working mode, but still occupy physical interface resources and need to be wired.

[0003] With the continuous development of industrial control technology, the demand for reducing costs, improving efficiency and simplifying wiring is becoming increasingly urgent. Time division multiplexing technology provides an effective way to solve these problems. Through time division multiplexing technology, a simple interface protocol can be defined to achieve the multiplexing of connection lines in the response working mode. This multiplexing method can effectively reduce the number of physical IO interfaces without affecting the normal operation of the equipment, thereby reducing hardware costs, simplifying the wiring process, and improving resource utilization and avoiding resource waste. Summary of the invention

[0004] The purpose of the present invention is to provide a method for multiplexing connecting wires for industrial control, so as to solve the problem of large number of connecting wires and complicated connection in the prior art of industrial control.

[0005] To achieve the above object, the present invention provides a method for multiplexing connecting lines for industrial control, comprising the following steps:

[0006] Step 1: Layout of lead segment signals, including layout of control ports, layout of single-chip microcomputer application interfaces, and layout of connection lines C;

[0007] Step 2: Based on time-division multiplexing, complete signal transmission between the control port and the microcontroller application interface.

[0008] Preferably, the layout of the control port includes the layout of the status input terminal A1 and the control output terminal B1. Specifically, the status input terminal A1 and the control output terminal B1 are commonly connected to a port X through a lead.

[0009] Preferably, the layout of the microcontroller application interface includes the layout of the execution input terminal A2 and the execution output terminal B2. Specifically, the execution input terminal A2 and the execution output terminal B2 are commonly connected to a port Y through a lead.

[0010] Preferably, the port X and the port Y are connected by a connection line C.

[0011] Preferably, a diode is provided between the execution input terminal A2 and the port Y, and a pull-up resistor is provided between the diode and the execution input terminal A2 to keep the signal at a high level state.

[0012] Preferably, a resistor and a triode are provided between the execution output terminal B2 and the port Y to achieve circuit level conversion and enhance signal driving ability.

[0013] Preferably, the process of completing signal transmission between the control port and the microcontroller application interface based on time-division multiplexing in Step 2 is as follows:

[0014] S21: The control output terminal B1 outputs a low-level pulse with a width between 2 milliseconds and 10 milliseconds, transmits it to the connection line C, the execution input terminal A2 receives the signal, and at the same time triggers the execution output terminal B2 to output a high level, indicating that the signal has been received;

[0015] S22: The high level output by the execution output terminal B2 makes the connection line C at a low level, the status input terminal A1 receives a low signal, confirms that the execution end has responded, and waits for the execution to complete;

[0016] S23: After the execution end runs the controlled action, the execution output terminal B2 outputs a low level, making the C connection signal high;

[0017] S24: After the status input terminal A1 receives a valid high level, it indicates that the action has been completed, and the next action is executed.

[0018] Therefore, by adopting the above-mentioned method for multiplexing connection lines for industrial control, the present invention has the following beneficial effects:

[0019] (1) By multiplexing the connection lines, the present invention reduces the number of connection line ports used, releases the resources originally occupied by a large number of physical IO interfaces, and improves the resource utilization rate;

[0020] (2) The time-division multiplexing adopted by the present invention is convenient to use in response applications. Especially when there are multiple ports, it greatly reduces costs. Since the number of physical IO interfaces is reduced, the hardware cost is significantly reduced. At the same time, the simplified wiring also reduces the amount of wiring materials used, further reducing costs.

[0021] (3) The output of the control end adopts a pulse method with certain requirements, and the execution end adopts a level method signal, thereby improving the reliability and stability of the circuit board.

[0022] The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. Description of the Drawings

[0023] Figure 1 is the traditional industrial control connection diagram in the background technology;

[0024] Figure 2 is the industrial control connection diagram of the embodiment of the present invention;

[0025] Figure 3 is the level change diagram of the embodiment of the present invention. Detailed Embodiment

[0026] The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention claimed, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0027] Please refer to Figures 2 - 3 , a method for multiplexing connection lines for industrial control, comprising the following steps:

[0028] Step 1, arranging lead segment signals; including arranging the control port, the single-chip microcomputer application interface, and the connection line C; arranging the control port includes arranging the status input terminal A1 and the control output terminal B1. Specifically: the status input terminal A1 and the control output terminal B1 are commonly connected to a port X through a lead; arranging the single-chip microcomputer application interface includes arranging the execution input terminal A2 and the execution output terminal B2. Specifically: the execution input terminal A2 and the execution output terminal B2 are commonly connected to a port Y through a lead; the port X and the port Y are connected by the connection line C; a diode is arranged between the execution input terminal A2 and the port Y, and a pull-up resistor is arranged between the diode and the execution input terminal A2 to keep the signal in a high-level state; a resistor and a triode are arranged between the execution output terminal B2 and the port Y to realize circuit level conversion and enhance the signal driving ability; among them, the judgment of the signal, the selection of the function, and the connection method of the lead are all completed by the processor selection;

[0029] Step 2: Complete signal transmission for the control port and the microcontroller application interface based on time-division multiplexing. The specific process is as follows:

[0030] S21: The control output terminal B1 outputs a low-level pulse with a width between 2 milliseconds and 10 milliseconds, which is transmitted to the connection line C. The execution input terminal A2 receives the signal, and at the same time, the execution output terminal B2 is triggered to output a high level, indicating that the signal has been received.

[0031] S22: The execution output terminal B2 outputs a high level, making the connection line C at a low level. The status input terminal A1 receives a low signal, confirming that the execution end has responded and waiting for the execution to complete.

[0032] S23: After the execution end has completed the controlled action, the execution output terminal B2 outputs a low level, making the C connection signal high.

[0033] S24: After the status input terminal A1 receives a valid high level, it indicates that the action has been completed, and the next action is executed.

[0034] Therefore, the present invention adopts the above-mentioned method for multiplexing connection lines for industrial control. Through the design of the circuit structure and signal transmission mode, it realizes time-sharing efficient and low-cost industrial control signal processing and transmission.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for multiplexing connection lines for industrial control, characterized in that, It includes the following steps: Step 1: Lay out the signal of the lead segment; including the layout of the control port, the layout of the single-chip microcomputer application interface, and the layout of the connecting wire C; Step 2: Complete the signal transmission for the control port and the single-chip microcomputer application interface based on time-division multiplexing.

2. The method for multiplexing connection lines for industrial control according to claim 1, wherein: The layout of the control port includes the layout of the status input terminal A1 and the control output terminal B1. Specifically, the status input terminal A1 and the control output terminal B1 are commonly connected to a port X through a lead wire.

3. The method for multiplexing connection lines for industrial control according to claim 2, wherein: The layout of the single-chip microcomputer application interface includes the layout of the execution input terminal A2 and the execution output terminal B2. Specifically, the execution input terminal A2 and the execution output terminal B2 are commonly connected to a port Y through a lead wire.

4. The method for multiplexing connection lines for industrial control according to claim 3, wherein: Connect the port X and the port Y through the connecting wire C.

5. The method for multiplexing connection lines for industrial control according to claim 4, wherein: A diode is provided between the execution input terminal A2 and the port Y, and a pull-up resistor is provided between the diode and the execution input terminal A2.

6. The method for multiplexing connection lines for industrial control according to claim 5, wherein: A resistor and a triode are provided between the execution output terminal B2 and the port Y.

7. A method for multiplexing connection lines for industrial control according to claim 6, characterized in that, The process of completing the signal transmission for the control port and the single-chip microcomputer application interface based on time-division multiplexing in Step 2 is as follows: S21: The control output terminal B1 outputs a low-level pulse with a width between 2 milliseconds and 10 milliseconds, and transmits it to the connecting wire C. The execution input terminal A2 receives the signal, and at the same time triggers the execution output terminal B2 to output a high level, indicating that the signal has been received; S22: The execution output terminal B2 outputs a high level to make the connecting wire C at a low level. The status input terminal A1 receives a low signal, confirms that the execution end has responded, and waits for the execution to complete; S23: After the execution end runs the controlled action, the execution output terminal B2 outputs a low level to make the C connection signal high; S24: After the status input terminal A1 receives a valid high level, it indicates that the action has been completed, and the next action is executed.

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