Production line dust removal interlocking system and method

Abstract

The invention relates to a production line dust removal interlocking system and method. The production line dust removal interlocking system comprises production line equipment, a production line programmable logic controller, dust removal equipment, a dust removal programmable logic controller and an upper computer system. And the production line editable logic controller is in communication connection with the dust removal editable logic controller. And the upper computer system sends a dust removal starting request to the dust removal programmable logic controller through the production line programmable logic controller. And the dust removal programmable logic controller is configured to start the dust removal equipment after receiving the dust removal start request, and feed back a dust removal operation state signal to the production line programmable logic controller after obtaining the dust removal operation state signal of the dust removal equipment. And the production line programmable logic controller is configured to start the production line equipment after receiving the dust removal operation state signal.

Description

Technical Field

[0001] This application relates to the field of industrial automation control technology, and in particular to a dust removal interlocking system and method for a production line. Background Technology

[0002] Dust removal equipment is a crucial environmental and safety facility in industrial production. It mainly consists of dust collection hoods, exhaust ducts, fans, and screw conveyors. Through negative pressure, it purifies dust-laden gas and recovers dust, playing a vital role in dust and explosion prevention, and protecting equipment and personnel safety. However, in some outdated production lines, the dust removal system operates independently from the production line system. Dust removal operation relies on manual control, and the electrical control system cannot monitor the dust removal system's status in real time. The lack of interlocking control between the two systems leads to control lag, resulting in safety hazards and energy waste. Summary of the Invention

[0003] Therefore, it is necessary to provide a production line dust removal interlock system and method to address the issue of independent control of dust removal equipment and production line systems.

[0004] A dust removal interlock system for a production line includes:

[0005] Production line equipment, production line programmable logic controller, dust removal equipment, dust removal programmable logic controller, and host computer system;

[0006] The production line programmable logic controller (PLC) and the dust removal programmable logic controller (PLC) are connected in communication.

[0007] The host computer system sends a dust removal start request to the dust removal programmable logic controller through the production line programmable logic controller;

[0008] The dust removal programmable logic controller is configured to start the dust removal equipment after receiving a dust removal start request, and to feed back the dust removal operation status signal to the production line programmable logic controller after obtaining the dust removal operation status signal of the dust removal equipment.

[0009] The production line programmable logic controller is configured to start the production line equipment upon receiving a dust removal operation status signal.

[0010] In one embodiment, the production line programmable logic controller is equipped with a first Ethernet communication module, a first detection sensor, and a first actuator; the dust removal programmable logic controller is equipped with a second Ethernet communication module, a second detection sensor, and a second actuator.

[0011] The first Ethernet communication module is connected to the second Ethernet communication module.

[0012] The first actuator is used to drive the production line equipment, and the second actuator is used to drive the dust removal equipment.

[0013] The first detection sensor is used to detect the production line operating status signal of the production line equipment;

[0014] The second detection sensor is used to detect the dust removal operation status signal of the dust removal equipment.

[0015] In one embodiment, the host computer system includes a display unit and an alarm unit connected to each other; the display unit is used to receive the dust removal operation status signal and generate a display screen according to the dust removal operation status signal, and the alarm unit is used to receive the dust removal operation status signal and generate an alarm screen according to the dust removal operation status signal.

[0016] A dust removal interlocking method for a production line, applicable to any of the above-mentioned production line dust removal interlocking systems, the method comprising:

[0017] Request from the host computer system;

[0018] If the request from the host computer system is a dust removal start request, then the dust removal start flag of the production line programmable logic controller will be changed from a variable to an enabled state.

[0019] Acquire operating status signals of dust removal equipment;

[0020] If the status signal of the dust removal equipment is "running", then modify the dust removal running status variable of the production line's editable logic controller to "running".

[0021] The production line equipment starts when the dust removal start flag is enabled and the dust removal operation status variable is in operation.

[0022] In one embodiment, the dust removal programmable logic controller is configured to send a pulse signal to enable the dust removal device to start after receiving a dust removal start request.

[0023] In one embodiment, the running status signal includes at least: a stopped state, a startup state, a startup failure state, and a running state;

[0024] When the operating status signal received by the dust removal operating status variable is one of the following: stopped, starting, or starting failure, the production line equipment remains stopped.

[0025] In one embodiment, if the production line programmable logic controller does not receive a running status signal within a preset waiting time after the dust removal start flag variable is enabled, it outputs an alarm signal to the host computer system.

[0026] In one embodiment, the production line programmable logic controller feeds back the operating status signal to the host computer system, and the host computer system feeds back the corresponding display screen based on the operating status signal.

[0027] In one embodiment, when the production line equipment stops, the dust removal equipment shuts down after a preset delay time.

[0028] In one embodiment, the production line programmable logic controller is configured to set the dust removal start delay time via a host computer system; the preset waiting time is set to 3 minutes, and the preset delay time is set within the range of 1-5 minutes.

[0029] The aforementioned production line dust removal interlock system includes: production line equipment, a production line programmable logic controller (PLC), dust removal equipment, a dust removal PLC, and a host computer system. The production line PLC and the dust removal PLC are communicatively connected. The host computer system sends a dust removal start request to the dust removal PLC through the production line PLC. The dust removal PLC is configured to start the dust removal equipment upon receiving the start request and, after acquiring the dust removal operation status signal, feed it back to the production line PLC. The production line PLC is configured to start the production line equipment upon receiving the dust removal operation status signal.

[0030] A dust removal interlocking method for a production line has the aforementioned beneficial effects. Attached Figure Description

[0031] Figure 1 This is a control flowchart of the production line dust removal interlock system provided in an embodiment of this application. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] See Figure 1 As shown, Figure 1 This is a control flowchart of a production line dust removal interlock system provided in an embodiment of this application. The system includes: production line equipment, a production line programmable logic controller (PLC), dust removal equipment, a dust removal PLC, and a host computer system. The production line PLC and the dust removal PLC are communicatively connected.

[0039] The host computer system sends a dust removal start request to the dust removal programmable logic controller (PLC) through the production line programmable logic controller (PLC). The production line PLC and the dust removal PLC can both be described using the dust removal PLC.

[0040] The dust removal programmable logic controller is configured to start the dust removal equipment upon receiving a dust removal start request, and to feed back the dust removal operation status signal to the production line programmable logic controller after acquiring the dust removal operation status signal. The production line programmable logic controller is configured to start the production line equipment upon receiving the dust removal operation status signal.

[0041] In one embodiment, the production line equipment is an air separator, the dust removal equipment is a pulse bag filter, and the host computer system is an IFIX system. The production line PLC sends a dust removal start request to the dust removal PLC. Upon receiving the request, the dust removal PLC drives the dust removal fan to start and collects real-time operating status signals, feeding them back to the production line PLC. Once the production line PLC confirms the dust removal operating status signal is "running," it outputs a signal to start the air separator. Fully automatic interlocking control is achieved through PLC communication, ensuring that the dust removal equipment starts before the production line, avoiding the safety hazard of production without proper dust treatment, and improving production efficiency and safety.

[0042] In some embodiments of this application, the production line programmable logic controller is equipped with a first Ethernet communication module, a first detection sensor, and a first actuator; the dust removal programmable logic controller is equipped with a second Ethernet communication module, a second detection sensor, and a second actuator.

[0043] The first Ethernet communication module is connected to the second Ethernet communication module.

[0044] The first actuator is used to drive the production line equipment, and the second actuator is used to drive the dust removal equipment.

[0045] The first detection sensor is used to detect the production line operating status signal of the production line equipment;

[0046] The second detection sensor is used to detect the dust removal operation status signal of the dust removal equipment.

[0047] The first Ethernet communication module in the production line PLC is connected to the second Ethernet communication module in the dust removal PLC via an industrial Ethernet switch to achieve data exchange. The first detection sensor is a proximity switch installed on the production line equipment (detecting the equipment's start / stop status), and the first actuator is a contactor (controlling the production line motor). The second detection sensor is a pressure transmitter in the dust removal equipment (detecting the negative pressure in the dust removal duct), and the second actuator is a frequency converter (adjusting the speed of the dust removal fan). For example, when the negative pressure in the dust removal duct falls below a set threshold, the second detection sensor triggers a signal to the dust removal PLC, which determines it as a "dust removal fault" and feeds back to the production line PLC. Ethernet communication ensures the real-time performance and stability of data transmission; the precise matching of the detection sensors and actuators enables real-time monitoring and control of the equipment status, improving the reliability of the interlocking system.

[0048] The PLCs of the production line and dust removal equipment are connected via industrial Ethernet. Siemens S7 series PLCs are used (e.g., the production line PLC model is S7-1500, and the dust removal PLC model is S7-1200). Data interaction is achieved through the PROFINET protocol, and the communication medium is shielded twisted pair cable. The connection to an industrial-grade switch ensures stability.

[0049] The communication includes: the production line PLC sending a start request signal to the dust removal PLC, and the dust removal PLC feeding back operating status signals (running / stopping / fault), equipment voltage / current and other parameters to the production line PLC.

[0050] On the production line side: a proximity switch is installed to detect the start and stop status of the production line equipment (such as detecting the speed of the wire drying machine motor), and the signal is connected to the PLC digital input module; the start and stop of the production line motor is controlled by a contactor, and the PLC digital output module drives the contactor coil.

[0051] Dust removal side: A pressure transmitter is used to detect the negative pressure value of the dust removal pipeline, and the analog signal is connected to the PLC analog input module; the speed of the dust removal fan is adjusted by a frequency converter, and the PLC sends frequency commands through the Modbus protocol.

[0052] In some embodiments of this application, the host computer system includes a display unit and an alarm unit connected to each other; the display unit is used to receive the dust removal operation status signal and generate a display screen according to the dust removal operation status signal, and the alarm unit is used to receive the dust removal operation status signal and generate an alarm screen according to the dust removal operation status signal.

[0053] The iFix interface of the host computer system sets up a dust removal status monitoring module, including a display unit and an alarm unit. The display unit dynamically displays the dust removal status through a configuration screen (e.g., green indicator light for "running," gray for "stopped," yellow for "starting," and red for "startup failure"), and updates parameters such as pressure and speed in real time. When the dust removal operation status signal is "startup failure" or "stopped," the host computer displays a red alarm window, simultaneously triggering an audible and visual alarm (e.g., a buzzer combined with a red warning light), and records the fault time and type.

[0054] A dust removal interlocking method for a production line, applicable to the aforementioned dust removal interlocking system, the method comprising:

[0055] Requests from the host computer system;

[0056] If the request from the host computer system is the dust removal start request, then the dust removal start flag of the production line programmable logic controller is modified to the enabled state.

[0057] Obtain the operating status signal of the dust removal equipment;

[0058] If the status signal of the dust removal equipment is in the running state, then the dust removal running state variable of the production line programmable logic controller is modified to the running state;

[0059] The production line equipment starts when the dust removal start flag is enabled and the dust removal operation status variable is in operation.

[0060] Specifically, the production line programmable logic controller (PLC) and the dust removal PLC are connected via Ethernet communication. A data block is added to the production line PLC, containing a dust removal start flag variable and a dust removal operating status variable. The production line PLC uses the dust removal start flag variable to issue a start request for the dust removal system. The dust removal operating status variable is used by the production line PLC to receive operating status signals from the dust removal equipment. When the dust removal start flag variable is enabled and the dust removal operating status variable is simultaneously in the running state, the production line equipment starts.

[0061] In one embodiment of this application, taking the Siemens TIAPortal programming environment as an example: A DB data block "Dust_Lock" is created in the production line PLC, and a new variable is added:

[0062] Dust removal start flag variable: HMI_Key_DustStar2 (Bool type), associated with the "Request Dust Removal Start" button on the host computer, the variable value is set to "1" when the button is pressed;

[0063] Dust removal operation status variable: HMI_DustRunstate2 (Int type), 0=Stopped, 1=Running, 2=Starting, 3=Startup failure.

[0064] Only when HMI_Key_DustStar2=1 and HMI_DustRunstate2=1, the production line PLC outputs a 1-second pulse signal to the production line equipment contactor to trigger the start.

[0065] Startup Process: When the operator clicks the "Request Dust Removal Start" button on the host computer, this action prompts the production line PLC to send a start signal to the dust removal PLC. Upon receiving this start signal, the dust removal PLC drives the fan to start. Once the dust removal equipment is running normally, the dust removal PLC will feed back the "Operating Status" to the production line PLC. Upon receiving the feedback "Operating Status," the production line PLC will allow the production line to start. For example, in a real production scenario, before the production line is about to start operating, the operator sends a start request through the host computer. The production line PLC generates a start signal based on this instruction and transmits it to the dust removal PLC, preparing for the subsequent start-up of the production line equipment. In the Siemens TIAPortal programming environment, the dust removal start flag variable "HMI_Key_DustStar2 (Bool type)" in the DB data block "Dust_Lock" created in the production line PLC is associated with the "Request Dust Removal Start" button on the host computer. When the button is pressed, the variable value is set to "1". This change in variable state essentially represents the generation and transmission of the start signal.

[0066] Shutdown Procedure: When the production line shuts down normally, the production line PLC sends a shutdown signal. Upon receiving the shutdown signal, the dust removal equipment does not immediately stop operating but continues running for 600 seconds to allow time for cleaning residual dust. After this 600-second delay, the dust removal PLC controls the fan to stop. For example, when the production line completes its production task and shuts down normally, the production line PLC will send a shutdown signal to ensure that the dust removal equipment can effectively clean the residual dust generated during production, preventing dust residue from adversely affecting the equipment and the environment. In the actual program control logic, this process is implemented through the control program inside the production line PLC. When the shutdown status of the production line equipment is detected, a corresponding instruction is triggered to send a shutdown signal to the dust removal equipment.

[0067] In some embodiments of this application, the dust removal programmable logic controller is configured to send a 1-second pulse signal to enable the dust removal device to start after receiving a dust removal start request.

[0068] After receiving the dust removal start request (HMI_Key_DustStar2=1), the dust removal PLC triggers the internal timer "Timer[2]" to generate a 1-second pulse signal. This signal enables the dust removal fan to start through the second actuator (frequency converter). For example, the fan start requires the damper to open and the motor to start in sequence. The 1-second pulse ensures that the instruction is executed only once, avoiding repeated triggering.

[0069] In some embodiments of this application, the running status signal includes at least: a stopped state, a starting state, a starting failure state, and a running state;

[0070] When the operating status signal received by the dust removal operating status variable is one of the following: stopped, starting, or starting failure, the production line equipment remains stopped.

[0071] The dust collector operating status signals are defined as follows:

[0072] Stopped state: HMI_Key_DustStar2=0 or HMI_DustRunstate2=0 (dust removal is not enabled or the machine is stopped);

[0073] Startup status: HMI_Key_DustStar2=1 and HMI_DustRunstate2=2 (no run signal received within 3 minutes after the startup request was triggered);

[0074] Startup failure status: HMI_Key_DustStar2=1 and HMI_DustRunstate2=3 (failure to start within 3 minutes, such as fan motor overload);

[0075] Operating status: HMI_DustRunstate2=1 (The fan is running normally and the pipeline negative pressure meets the standard).

[0076] When any non-"running status" signal is fed back to the production line PLC, the production line equipment remains stopped.

[0077] In some embodiments of this application, if the production line programmable logic controller does not receive a running status signal within a preset waiting time after the dust removal start flag variable is enabled, it outputs an alarm signal to the host computer system.

[0078] The production line PLC is set with a timer "Timer[3]". When HMI_Key_DustStar2=1, the timer starts. If the HMI_DustRunstate2=1 signal is not received within 3 minutes (180 seconds), an alarm signal is sent to the host computer via Ethernet to trigger the "dust removal start timeout" alarm and lock the production line start permission.

[0079] In some embodiments of this application, the production line programmable logic controller feeds back the operating status signal to the host computer system, and the host computer system feeds back the corresponding display screen based on the operating status signal.

[0080] The production line PLC transmits the HMI_DustRunstate2 variable value to the host computer iFix system in real time via Ethernet. The host computer then calls up the corresponding configuration screen based on the variable value.

[0081] HMI_DustRunstate2=0: Displays a "Dust removal stopped" screen, with the device status indicated in gray;

[0082] HMI_DustRunstate2=1: Displays the "Dust Removal Operation" screen, with the equipment status marked in green, and dynamically displays parameter curves such as negative pressure and current.

[0083] In some embodiments of this application, when the production line equipment stops, the dust removal equipment shuts down after a preset delay. When the production line equipment receives a "stop" signal (e.g., by pressing the "stop" button on the host computer), the production line PLC immediately stops the equipment and triggers an internal delay timer (set to 600 seconds). During the delay, the dust removal equipment continues to run to clean up residual dust; after the delay ends, the dust removal PLC controls the fan to stop and the damper to close.

[0084] In some embodiments of this application, the default value of the preset waiting time is set to 3 minutes (which can be modified via a host computer, ranging from 1 to 5 minutes). After logging into the administrator account, the operator enters a value in the parameter setting interface (e.g., changing it to 2 minutes), and clicks "Confirm." The new parameter immediately takes effect and is synchronized to the production line PLC.

[0085] Set the preset delay time to a fixed 600 seconds; no modification is needed to ensure thorough cleaning of residual dust.

[0086] In one embodiment of this application, the control logic of the production line dust removal interlock system is as follows: The operator sends a dust removal start request through the host computer system. This request is transmitted to the dust removal programmable logic controller (PLC) via the production line PLC. Upon receiving the request, the dust removal PLC triggers an internal timer to generate a 1-second pulse signal, enabling the dust removal equipment to start via a second actuator (such as a frequency converter). Simultaneously, it collects the operating status signals of the dust removal equipment in real time (including stop status, start-up status, start-up fault status, and running status). After the dust removal equipment is running normally, the dust removal PLC feeds back the operating status signal to the first Ethernet communication module of the production line PLC via the second Ethernet communication module. When the production line PLC determines in the data block that the dust removal start flag variable is in the enabled state and the dust removal running status variable is in the running state, it starts the production line equipment via the first actuator (such as a contactor). If the dust removal PLC fails to feed back the running status signal to the production line PLC within 3 minutes after receiving the dust removal start request, the production line PLC outputs an alarm signal to the host computer system, triggering a "dust removal start timeout" alarm and locking the production line start permission. In the host computer system, the display unit dynamically displays the dust removal status based on the received dust removal operation status signals (e.g., green indicator light for "running", gray for "stopped", yellow for "starting", and red for "startup failure") and refreshes parameters such as pressure and speed in real time. When the alarm unit receives abnormal status signals such as "startup failure" or "stopped", a red alarm window pops up, triggering an audible and visual alarm and recording the fault time and type. When the production line equipment receives a stop signal, it immediately stops running and triggers an internal delay timer (set to 600 seconds). During the delay, the dust removal equipment continues to run to clean residual dust. After the delay, the dust removal PLC controls the dust removal equipment to stop. The production line PLC and the dust removal PLC are connected via an industrial Ethernet switch, using Siemens S7 series PLCs, and data exchange is achieved through the PROFINET protocol. On the production line side, proximity switches detect the start / stop status of the production line equipment, and the signals are input to the PLC's digital input module. On the dust removal side, pressure transmitters detect the negative pressure value of the dust removal pipeline, and analog signals are input to the PLC's analog input module. This ensures the real-time and stable transmission of data, enabling real-time monitoring and control of the equipment status. The default preset waiting time is 3 minutes (which can be modified within the range of 1-5 minutes via the host computer), and the preset delay time is fixed at 600 seconds to ensure that residual dust is thoroughly cleaned. The entire system achieves fully automatic interlock control through PLC communication, ensuring that the dust removal equipment starts before the production line, avoiding the safety hazards of production without dust treatment, and improving production efficiency and safety.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A dust removal interlock system for a production line, characterized in that, The dust removal interlock system for the production line includes: Production line equipment, production line programmable logic controller, dust removal equipment, dust removal programmable logic controller, and host computer system; The production line programmable logic controller is communicatively connected to the dust removal programmable logic controller; The host computer system sends a dust removal start request to the dust removal programmable logic controller through the production line programmable logic controller; The dust removal programmable logic controller is configured to start the dust removal equipment after receiving the dust removal start request, and to feed back the dust removal operation status signal to the production line programmable logic controller after obtaining the dust removal operation status signal of the dust removal equipment. The production line programmable logic controller is configured to start the production line equipment upon receiving the dust removal operation status signal.

2. The production line dust removal interlock system according to claim 1, characterized in that, The production line programmable logic controller is equipped with a first Ethernet communication module, a first detection sensor, and a first actuator; the dust removal programmable logic controller is equipped with a second Ethernet communication module, a second detection sensor, and a second actuator. The first Ethernet communication module is communicatively connected to the second Ethernet communication module; The first actuator is used to drive the production line equipment, and the second actuator is used to drive the dust removal equipment; The first detection sensor is used to detect the production line operating status signal of the production line equipment; The second detection sensor is used to detect the dust removal operation status signal of the dust removal equipment.

3. The production line dust removal interlock system according to claim 2, characterized in that, The host computer system includes a display unit and an alarm unit connected to each other; the display unit is used to receive the dust removal operation status signal and generate a display screen according to the dust removal operation status signal; the alarm unit is used to receive the dust removal operation status signal and generate an alarm screen according to the dust removal operation status signal.

4. A dust removal interlocking method for a production line, characterized in that, The method applicable to the dust removal interlock system for the production line according to any one of claims 1-3 includes: Requests from the host computer system; If the request from the host computer system is the dust removal start request, then the dust removal start flag of the production line programmable logic controller is modified to the enabled state. Obtain the operating status signal of the dust removal equipment; If the status signal of the dust removal equipment is in the running state, then the dust removal running state variable of the production line programmable logic controller is modified to the running state; The production line equipment starts when the dust removal start flag is enabled and the dust removal operation status variable is in operation.

5. The production line dust removal interlocking method according to claim 4, characterized in that, The dust removal programmable logic controller is configured to send a pulse signal to enable the dust removal equipment to start after receiving the dust removal start request.

6. The production line dust removal interlocking method according to claim 4, characterized in that, The operating status signal includes at least: stop status, startup status, startup failure status, and the operating status; When the operating status signal received by the dust removal operating status variable is one of the stopped state, the starting state, or the starting failure state, the production line equipment remains stopped.

7. The production line dust removal interlocking method according to claim 4, characterized in that, If the production line programmable logic controller does not receive the operating status signal within a preset waiting time after the dust removal start flag variable is enabled, it outputs an alarm signal to the host computer system.

8. The production line dust removal interlock method according to claim 7, characterized in that, The production line programmable logic controller feeds back the operating status signal to the host computer system, and the host computer system displays the corresponding screen based on the operating status signal.

9. The production line dust removal interlocking method according to claim 8, characterized in that, When the production line equipment stops, the dust removal equipment will shut down after a preset delay time.

10. The production line dust removal interlocking method according to claim 9, characterized in that, The production line programmable logic controller is configured to set parameters for the dust removal start-up delay time via a host computer system; The preset waiting time is set to 3 minutes, and the preset delay time is set within the range of 1-5 minutes.

Images