Method for controlling the transmission interlock of a hot-rolled steel sheet passage

Abstract

The present application relates to hot-rolled strip production technology field, especially to a kind of control hot-rolled steel plate passway transmission interlock method, including real-time monitoring the running state of each transmission system in hot-rolled steel plate passway;Production process is divided into the following working condition mode: two kinds of transmission fault determination strategies of public use and individual use are set for different equipment, and the input condition of each coiler is respectively evaluated;According to current working condition mode and transmission fault, corresponding interlock control strategy is executed.The present application has the advantages that: when transmission system fails, the coiling of the strip being rolled can be completed to the maximum extent, and the steel sticking accident caused by rigid interlock can be avoided, in mode C, when the finishing mill has entered the steel and the coiling passway has no steel, the non-emergency fault of all running coilers is shielded for a period, to ensure that the head of the strip enters the coiler smoothly, and in mode B, the non-coil drum type transmission fault of the current coiler is shielded, to allow the current strip coiling to be completed.

Description

Technical Field

[0001] This invention relates to the field of hot-rolled strip steel production technology, and in particular to a method for controlling the transmission interlock of hot-rolled steel plate channels. Background Technology

[0002] In the hot-rolled strip steel production process, the normal operation of the transmission systems, including the laminar flow roller conveyor, the front roller conveyor and pinch rolls of the No. 1 coiler, and the upper roller conveyors and pinch rolls of the No. 2 and No. 3 coilers, is a key factor in whether the coiler can be put into operation. The status of the above transmission systems is usually used as a chain condition for the coiler to enter production. That is, the coiler is only allowed to enter production mode when all relevant transmission equipment is operating normally; once any key transmission equipment fails, the corresponding coiler will automatically exit production mode, and its speed control will switch to a stop standby state.

[0003] Taking the No. 3 coiler as an example, its normal production requires all the roller conveyors in front of it, as well as the pinch rollers of the No. 1 and No. 2 coilers that bear the responsibility of conveying the strip, to meet normal operating conditions. If any of these devices malfunctions, the No. 3 coiler cannot be used. However, this rigid interlocking mechanism has exposed a series of problems in actual production: when the coiler is in production or the strip head has entered the central roller conveyor, if a sudden transmission system failure causes the currently used coiler to no longer meet the operating conditions, the system cannot switch to other available coilers in time, which can easily lead to a steel jamming accident. Such accidents not only produce several pieces of scrap strip steel, causing material waste, but also require a lot of manpower for a long time to clean up the scrap steel, seriously affecting production efficiency and equipment utilization.

[0004] Further analysis revealed that the potential problem had already formed when the finishing mill began feeding steel. If a transmission system malfunction caused all coilers to fail to meet the operational requirements at this point, the strip would inevitably jam in the finishing mill area, even if it didn't jam in the coiling area, resulting in a complete line shutdown. The lack of differentiated interlocking control strategies for different production stages prevented flexible adjustments to the control logic based on actual operating conditions after a malfunction, severely impacting production continuity and safety. Summary of the Invention

[0005] The purpose of this invention is to provide a method for controlling the transmission interlock of hot-rolled steel plate channels. By real-time monitoring of the transmission system status, dividing the finishing rolling and coiling working modes, distinguishing between common and individual faults, and adopting differentiated control strategies according to different working conditions, the method can maximize the completion of the current strip coiling when a transmission fault occurs, avoid steel jamming accidents, reduce scrap loss and manpower consumption, and improve production continuity and equipment utilization.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A method for controlling the interlocking of a hot-rolled steel plate channel transmission includes: S1. Real-time monitoring of the operating status of each transmission system in the hot-rolled steel plate channel; S2. Based on the production status of finishing rolling and coiling, the production process is divided into the following working modes: Mode A is when the finishing mill has not received any steel and the coiling channel is empty; Mode B is when the finishing mill has not yet fed steel but the coiling channel contains steel strip to be coiled; Mode C is when the finishing mill has already fed steel but the coiling channel is empty; Mode D is when the finishing mill has already fed steel and there is steel strip to be coiled in the coiling channel; S3. Set up two types of transmission fault judgment strategies for different equipment: public use and individual use, and evaluate the input conditions of each winding machine respectively. S4. Execute the corresponding interlocking control strategy based on the current operating mode and transmission fault; S5. The status of the transmission system is displayed in real time through the human-machine interface and an alarm mechanism is triggered.

[0007] In S2, the operating mode division includes the following specific scenarios: Mode A corresponds to the fine rolling standby state and the winding buffer area being idle. Mode B corresponds to the finishing mill standby, but there is already steel strip stuck in the coiling buffer area; Mode C corresponds to the finishing mill receiving steel strip, but the coiling buffer area has not yet received the steel strip. Mode D corresponds to continuous steel feeding in the finishing mill and the presence of steel strip in the coiling buffer area awaiting processing.

[0008] In S3, the criteria for determining transmission faults include: A common failure is a transmission system failure that affects the normal operation of multiple winding machines; Individual faults are localized transmission abnormalities that only affect the normal operation of a single winding machine.

[0009] In S3, the conditions for engaging the winding machine include: The input conditions for winding machine #1 satisfy n1 = the state of the pinch rolls of winding machine #1. Auxiliary rolling roll status Roll state Status of the preceding finishing mill roll conveyor system; The input conditions for the No. 2 winding machine satisfy n2 = the state of the pinch rolls of the No. 2 winding machine. Auxiliary rolling roll status Roll state Status of the preceding roller conveyor system The status of the lower clamping roller of the No. 1 coiler; The input conditions for the No. 3 winding machine satisfy n3 = the state of the pinch rolls of the No. 3 winding machine. Auxiliary rolling roll status Roll state The status of the lower clamping rollers of coilers #1 and #2; in, The AND operator indicates that the corresponding winding machine can be engaged when both conditions are met.

[0010] In S4, the chain control strategies include: S41. In Mode A: If at least one winding machine meets the input conditions: =1(1) Maintain normal production processes and issue fault warnings; in, Indicates a logical "OR" relationship; S42. In Mode B: Shield the non-drum drive faults of the current winding machine and complete the post-winding processing of the current steel strip faults. S43. In C mode: Shield all non-emergency malfunctions of the operating coiling machines and prioritize the completion of pre-production steel strip winding; S44. In D mode: The coiler is operated in mode B, and the finishing mill inlet is controlled in mode C.

[0011] In S2, under D mode, the current production coiler is controlled according to state B, and the finishing mill is controlled according to state C.

[0012] This also includes ensuring that automatic interlocking control can only be reactivated after all units have been confirmed to be back to normal following troubleshooting.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By monitoring the status of the transmission system in real time and adopting differentiated interlocking control strategies according to different working conditions of finishing rolling and coiling, the current strip coiling can be completed to the maximum extent when a transmission system failure occurs, avoiding steel jamming accidents caused by rigid interlocking. For example, in mode C, when steel has entered the finishing mill but there is no steel in the coiling channel, all non-emergency faults of the operating coiling machine are blocked for one cycle to ensure that the steel strip head enters the coiling machine smoothly; in mode B, non-coil transmission faults of the current coiling machine are blocked, allowing the current steel strip coiling to be completed. Practical application shows that after adopting the method of this invention, the rate of steel jamming accidents caused by transmission failure is reduced, the amount of scrap steel strip is reduced, and the product yield and production continuity are significantly improved. 2. Under the traditional rigid interlocking mechanism, once a transmission failure causes the coiler to stop production, it is very easy to cause a steel jamming accident. A large number of people need to enter the high-temperature area to clean the residual steel, which is not only time-consuming and labor-intensive, but also poses serious safety hazards. This invention, through fault shielding and automatic switching mechanism, can automatically complete the coiling of the current strip steel in most fault situations, avoiding steel jamming accidents. Even if manual intervention is still required in some cases, the operator can determine whether to stop the machine in an emergency after the fault alarm, allowing sufficient time for manual handling. 3. Classify transmission system failures into "common failures" and "individual failures," and precisely define the scope of the failure's impact based on the equipment's functional attributes (public use / individual use). When a common failure occurs, the system automatically determines whether there are other available winding machines. =1), maintain production as much as possible; when an individual failure occurs, partial shielding can be selected according to the working conditions, affecting only the single device and not affecting the normal operation of other winding machines; this precise fault classification and control strategy avoids the drawback of the entire line being shut down due to local equipment failure and improves the overall equipment utilization rate (OEE). 4. The HMI (Human-Machine Interface) displays the transmission system status in real time, using a combination of color coding and pop-up alarms to enable operators to intuitively and quickly grasp fault information. The alarm content includes not only the name and type of the faulty equipment but also suggested handling measures to assist operators in making correct judgments. At the same time, the system records the fault occurrence time, duration, and handling results, providing data support for equipment maintenance and fault analysis. This fault early warning and human-machine interaction mechanism significantly improves fault response speed and handling efficiency. 5. This invention upgrades traditional rigid interlocking control to adaptive flexible control based on operating conditions, enabling the production line to have a certain fault tolerance capability; through logical AND ( ) and logical "or" ( By combining judgments, the system can dynamically adjust the control strategy according to the actual working conditions, maintaining production to the maximum extent while ensuring safety. This invention represents the development direction of hot rolling production process control technology and provides strong support for steel enterprises to achieve intelligent manufacturing and lean production. 6. Through precise fault location and classification, it helps maintenance personnel quickly locate faulty equipment and reduce troubleshooting time; at the same time, by avoiding secondary damage to equipment caused by steel jamming accidents, the service life of the equipment is extended. Detailed Implementation

[0014] The present invention will now be described in detail, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0015] The following embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. Unless otherwise specified, the methods used in the following embodiments are conventional methods. Example 1:

[0016] A method for controlling the interlocking of a hot-rolled steel plate channel transmission specifically includes the following steps: S1. Real-time monitoring of the operating status of each transmission system in the hot-rolled steel plate channel; The system collects real-time operating data of the transmission system by deploying speed sensors, current detection devices, and fault diagnosis modules on various transmission equipment. For example, encoders and current transformers are installed on the laminar flow roller conveyor, the roller conveyor before the No. 1 coiler, the roller conveyors on the No. 2 and No. 3 coilers, each pinch roll, auxiliary coiling roll, and drum, respectively, to monitor the equipment's operating status with a sampling period of 50ms. When the actual speed of a certain transmission device deviates from the set speed by more than 5%, or the drive current exceeds the rated value by 20% for more than 3 seconds, the system determines that the equipment has a transmission abnormality and records the fault code and the time of occurrence. Taking a hot rolling production line as an example, the monitoring system covers 32 sets of roller conveyor motors, 6 pinch rolls, 6 auxiliary coiling rolls, and 3 drums, realizing real-time visual monitoring of the transmission status of the entire channel.

[0017] S2. Based on the production status of finishing rolling and coiling, the production process is divided into the following working condition modes; By using a hot metal detector at the finishing mill inlet and multiple photoelectric switches on the coiling channel, the position and production stage of the steel strip are determined in real time, dividing the production process into four operating modes: Mode A is when the finishing mill has not received any steel and the coiling channel is empty: The hot metal detector at the finishing mill inlet has no signal, and all photoelectric switches on the coiling channel have no signal, corresponding to a finishing mill standby state and an idle coiling buffer. For example, this mode occurs during material waiting or roll changing on the production line.

[0018] Mode B is when the finishing mill has not yet fed steel but the coiling channel contains steel strip to be coiled; The hot metal detector at the finishing mill inlet shows no signal, but the photoelectric switch on the coiling channel shows a signal, indicating that steel strip is stuck in the coiling buffer area. For example, the previous steel strip has been finished rolled but has not yet entered the coiler, or there is a steel pile-up in front of the coiler.

[0019] Mode C is when the finishing mill has already fed steel but the coiling channel is empty; The hot metal detector at the finishing mill inlet is showing a signal, but the photoelectric switches on the coiling channel are not, indicating that the finishing mill is feeding steel but the strip has not yet reached the coiling area. For example, the strip has just exited from the last stand of the finishing mill and is moving towards the coiler.

[0020] Mode D is when the finishing mill has already fed steel and there is steel strip to be coiled in the coiling channel; Both the hot metal detector at the finishing mill inlet and the photoelectric switch in the coiling channel are showing signals, indicating that the finishing mill is continuously feeding steel and that there is already steel strip waiting to be processed in the coiling buffer area. For example, the head of the steel strip has entered the front roller table of the coiler, but the finishing mill is still rolling the subsequent part.

[0021] In D mode, the current production coiler is controlled according to the B mode control strategy, and the finishing mill is controlled according to the C mode control strategy to ensure coordinated operation of upstream and downstream processes.

[0022] S3. Set up two types of transmission fault judgment strategies for different equipment: public use and individual use, and evaluate the input conditions of each winding machine respectively. Publicly used equipment is a resource shared by multiple winding machines. If it malfunctions, it will inevitably affect the operation of multiple winding machines simultaneously, and therefore it is judged as a public malfunction.

[0023] For example, the #1 lower pinch roll is a common-use equipment (affecting both the #2 and #3 winding machines). When a transmission failure occurs, the failure is classified as a common failure, causing n2 and n3 to be 0 simultaneously.

[0024] Individually used equipment serves only a single winding machine, and its failure only affects that winding machine itself, therefore it is judged as an individual failure.

[0025] For example, the auxiliary winding roller of the No. 2 winding machine is an individually used device. When its hydraulic system leaks, the fault is classified as an individual fault, which only causes n2=0 and does not affect the No. 1 and No. 3 winding machines.

[0026] Transmission fault diagnosis criteria include: Common faults: These refer to abnormalities in the transmission system that affect the normal operation of multiple winding machines, such as a fault in the laminar flow roller conveyor, a fault in the central roller conveyor, or a fault in the lower pinch roller of winding machines #1 or #2. For example, when motor #3 of the laminar flow roller conveyor trips due to overload, it will simultaneously affect the normal operation of winding machines #1, #2, and #3.

[0027] Individual faults: These refer to localized transmission abnormalities that only affect the normal operation of a single coiler, such as a faulty drum brake on a particular coiler, a malfunctioning encoder on the auxiliary winding roller, or a leak in the hydraulic cylinder of the pinch roller. For example, the loss of the drum speed feedback signal for coiler #2 only affects coiler #2 itself.

[0028] The winding machine's input conditions are determined by the logical AND (AND) operation. The winding machine can only be put into operation when all relevant equipment is functioning normally. (1) Conditions for putting the No. 1 winding machine into operation: n1=1# Status of the pinch rollers of the coiler Auxiliary rolling roll status Roll state Status of the preceding finishing mill roll conveyor system; For example, when the current of the #1 pinch roller is normal, the encoder feedback of the auxiliary winding roller is normal, the drum brake is open, and all preceding rollers are running normally, n1=1, indicating that the #1 winding machine can be put into operation.

[0029] (2) Conditions for putting the No. 2 winding machine into operation: n2=2# Condition of the pinch rollers of the coiler Auxiliary rolling roll status Roll state Status of the preceding roller conveyor system The status of the lower clamping roller of the No. 1 coiler; For example, even if all the equipment of the No. 2 winding machine is normal, if the No. 1 lower pinch roller malfunctions, then n2==0, and the No. 2 winding machine cannot be put into operation.

[0030] (3) Conditions for putting the No. 3 winding machine into operation: n3=3# Coiler pinch roll status Auxiliary rolling roll status Roll state The status of the lower clamping rollers of coilers #1 and #2; For example, the No. 3 winding machine requires that both the No. 1 and No. 2 lower pinch rollers be in normal condition before it can be used.

[0031] S4. Execute the corresponding interlocking control strategy based on the current operating mode and transmission fault; The interlocking control strategy is dynamically adjusted based on the operating mode and fault type: S41. In Mode A: If at least one winding machine meets the input conditions: =1(1) The normal production process is maintained, allowing the finishing mill to feed steel, while simultaneously issuing a fault warning to maintenance personnel.

[0032] For example, if a common fault occurs in the laminar flow roller conveyor at a certain moment, but the No. 1 winding machine itself is normal and its preceding roller conveyor is intact, and n1=1, then the system allows the No. 1 winding machine to continue production, and at the same time, the HMI interface pops up an alarm: "Laminar flow roller conveyor fault, No. 1 winding machine available".

[0033] S42. In Mode B: Non-drum drive faults on the current production coiler are masked for one control cycle (approximately 30 seconds), allowing the current steel strip winding to be completed before addressing the fault. If the fault occurs on the drum, the machine is stopped immediately.

[0034] For example, when the No. 2 coiler is winding the steel strip, its pinch rollers experience an overcurrent fault. The system automatically disables the fault interlock for 30 seconds, and only executes the stop and alarm after the steel strip is wound up and the tail leaves the pinch rollers.

[0035] S43. In C mode: The system disables all non-emergency faults of operating coilers for one control cycle, prioritizing the completion of pre-production steel strip winding tasks. Simultaneously, it checks for drum malfunctions in the pre-production coilers; if a malfunction is found, it automatically switches to another available coiler.

[0036] For example, the steel strip has been fed into the finishing mill and is expected to reach the winding area in 15 seconds. At this time, the encoder of the No. 1 winding machine malfunctions, but the No. 2 winding machine is intact. The system automatically switches the target winding machine from No. 1 to No. 2 to ensure that the steel strip is wound up smoothly.

[0037] S44. In D mode: The coiler currently in production is controlled using the B-mode control strategy, while the finishing rolling area is controlled using the C-mode control strategy, thus achieving differentiated control between the upstream and downstream processes.

[0038] For example, while the finishing mill is rolling the middle of the steel strip, the head of the steel strip has already entered the front roller table of the No. 3 coiler in the coiling buffer area. At this time, the pinch roll of the No. 3 coiler has a slight fault. The system uses mode B to shield the fault and complete the current steel strip coiling. At the same time, the finishing mill area is monitored in mode C to ensure that the subsequent part passes smoothly.

[0039] S5. Display the status of the transmission system in real time through the human-machine interface and trigger the alarm mechanism; A transmission system status monitoring interface is designed on the HMI screen, using color coding to distinguish equipment status: green indicates normal, yellow indicates warning, and red indicates fault. Clicking on any equipment icon displays detailed operating parameters, such as speed, current, temperature, and fault codes. When a transmission fault occurs, the system automatically pops up an alarm window displaying the name of the faulty equipment, fault type, time of occurrence, and suggested handling measures, while simultaneously triggering an audible and visual alarm to alert the operator.

[0040] For example, when the current of pinch roller #1 exceeds the limit, the corresponding icon on the HMI interface turns red, and the alarm window displays: "Pinch roller #1 is overloaded, current 230A, it is recommended to check the mechanical transmission parts."

[0041] S6. Automatic interlock control can only be put back into operation after the fault has been resolved and all units have been confirmed to be back to normal. After the fault is resolved, maintenance personnel manually reset the fault alarm through the HMI interface. The system automatically detects the status of the relevant equipment and confirms that all transmission systems have returned to normal operation before automatic interlock control can be put back into operation.

[0042] For example, after the fault of the No. 1 pinch roller is resolved, the maintenance personnel click the "Reset" button on the HMI. The system detects that the pinch roller current has returned to the rated value of 120A, the speed feedback is normal, and the status of other related equipment is intact. It automatically releases the interlock shield of the equipment and restores the automatic control of the entire line.

[0043] This invention monitors the transmission system status in real time and adopts differentiated interlocking control strategies based on different working conditions of finishing rolling and coiling. This allows for maximum completion of the coiling of the currently rolling strip even when a transmission system failure occurs, avoiding steel jamming accidents caused by rigid interlocking. For example, in mode C, when steel has entered the finishing mill but there is no steel in the coiling channel, all non-emergency faults of the operating coilers are blocked for one cycle, ensuring the smooth entry of the strip head into the coiler. In mode B, non-drum transmission faults of the current coiler are blocked, allowing the current strip coiling to be completed. Practical applications show that using this invention reduces the rate of steel jamming accidents caused by transmission failures, decreases the amount of scrap strip, and significantly improves product yield and production continuity. Traditional rigid interlocking... Under the lock mechanism, once a transmission failure causes the coiler to exit production, it is highly likely to cause a steel jam accident, requiring a large number of people to enter the high-temperature area to clean the residual steel, which is not only time-consuming and labor-intensive, but also poses serious safety hazards. This invention, through fault shielding and automatic switching mechanisms, can automatically complete the coiling of the current strip steel in most fault situations, avoiding steel jam accidents. Even in individual cases where manual intervention is still required, the operator can determine whether to stop the emergency after a fault alarm, allowing sufficient time for manual handling. The transmission system faults are divided into "common faults" and "individual faults," and the scope of the fault impact is precisely defined according to the functional attributes of the equipment (common use / individual use). When a common fault occurs, the system automatically determines whether there are other available coilers ( =1), maintaining production as much as possible; when an individual fault occurs, partial shielding can be selected according to the working conditions, affecting only the single device and not affecting the normal operation of other winding machines; this precise fault classification and control strategy avoids the drawback of the entire line being shut down due to the failure of a local device, and improves the overall equipment utilization rate (OEE); the status of the transmission system is displayed in real time through the HMI human-machine interface, using a combination of color marking and pop-up alarms, so that operators can intuitively and quickly grasp the fault information; the alarm content not only includes the name and type of the faulty device, but also provides suggested handling measures to assist operators in making correct judgments; at the same time, the system records the fault occurrence time, duration and handling results, providing data support for equipment maintenance and fault analysis; this fault warning and human-machine interaction mechanism significantly improves fault response speed and handling efficiency; this invention upgrades the traditional rigid interlock control to adaptive flexible control based on working condition mode, giving the production line a certain fault tolerance capability; through logical "AND" ( ) and logical "or" ( By combining judgments, the system can dynamically adjust the control strategy according to the actual working conditions, maintaining production to the maximum extent while ensuring safety. This invention represents the development direction of hot rolling production process control technology, providing strong support for steel enterprises to achieve intelligent manufacturing and lean production. Through accurate fault location and classification, it helps maintenance personnel quickly locate faulty equipment and reduce troubleshooting time. At the same time, by avoiding secondary damage to equipment caused by steel jamming accidents, the service life of the equipment is extended.

Claims

1. A method for controlling the interlocking of a hot-rolled steel plate channel transmission, characterized in that, include: S1. Real-time monitoring of the operating status of each transmission system in the hot-rolled steel plate channel; S2. Based on the production status of finishing rolling and coiling, the production process is divided into the following working modes: Mode A is when the finishing mill has not received any steel and the coiling channel is empty; Mode B is when the finishing mill has not yet fed steel but the coiling channel contains steel strip to be coiled; Mode C is when the finishing mill has already fed steel but the coiling channel is empty; Mode D is when the finishing mill has already fed steel and there is steel strip to be coiled in the coiling channel; S3. Set up two types of transmission fault judgment strategies for different equipment: public use and individual use, and evaluate the input conditions of each winding machine respectively. S4. Execute the corresponding interlocking control strategy based on the current operating mode and transmission fault; S5. The status of the transmission system is displayed in real time through the human-machine interface and an alarm mechanism is triggered.

2. The method for controlling the transmission interlock of a hot-rolled steel plate channel according to claim 1, characterized in that, In S3, the transmission fault determination criteria include: A common fault is a transmission system malfunction that affects the normal operation of multiple winding machines; Individual faults are localized transmission abnormalities that only affect the normal operation of a single winding machine.

3. The method for controlling the transmission interlock of a hot-rolled steel plate channel according to claim 1, characterized in that, In S3, the conditions for engaging the winding machine include: The input conditions for winding machine #1 satisfy n1 = the state of the pinch rolls of winding machine #1. Auxiliary rolling roll status Roll state Status of the preceding finishing mill roll conveyor system; The input conditions for the No. 2 winding machine satisfy n2 = the state of the pinch rolls of the No. 2 winding machine. Auxiliary rolling roll status Roll state Status of the preceding roller conveyor system The status of the lower clamping roller of the No. 1 coiler; The input conditions for the No. 3 winding machine satisfy n3 = the state of the pinch rolls of the No. 3 winding machine. Auxiliary rolling roll status Roll state The status of the lower clamping rollers of coilers #1 and #2; in, The AND operator represents the logical AND condition. When both conditions are met, the corresponding winding machine can be engaged.

4. The method for controlling the transmission interlock of a hot-rolled steel plate channel according to claim 1, characterized in that, In S4, the cascading control strategy includes: S41. In Mode A: If at least one winding machine meets the input conditions: =1（1）； Maintain normal production processes and issue fault warnings; in, Indicates a logical "OR" relationship; S42. In Mode B: Shield the non-drum drive faults of the current winding machine and complete the post-winding processing of the current steel strip faults. S43. In C mode: Shield all non-emergency malfunctions of the operating coiling machines and prioritize the completion of pre-production steel strip winding; S44. In D mode: The coiler is operated in mode B, and the finishing mill inlet is controlled in mode C.

5. The method for controlling the interlocking of hot-rolled steel plate channel transmission according to claim 1, characterized in that, In S2, under D mode, the current production coiler is controlled according to state B, and the finishing mill is controlled according to state C.

6. The method for controlling the interlocking of hot-rolled steel plate channel transmission according to claim 1, characterized in that, This also includes ensuring that automatic interlocking control can only be reactivated after all units have been confirmed to be back to normal following troubleshooting.

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