Roller coater control system

Abstract

The application discloses a roller coater control system, which comprises a PLC, a first switch and a plurality of actuators. The first switch is provided with a plurality of network ports, one of which is connected with the PLC through a first bus. The plurality of actuators are connected with the plurality of network ports of the first switch through a plurality of branch network lines. The PLC is built-in with a control program, which controls a plurality of functions of the plurality of actuators through the first bus and the plurality of branch network lines. The control program instruction built-in in the PLC can be sent through the first bus, and then the plurality of actuators can obtain the corresponding instructions sent from the PLC through the first switch, so that the number of wiring and the complexity of wiring can be greatly reduced.

Description

Technical Field

[0001] This application relates to the field of roller coating machine control technology, and specifically to a roller coating machine control system. Background Technology

[0002] As an important piece of equipment for surface treatment of materials such as leather, fabric, and film, the overall operation and control of roller coating machines usually relies on PLCs (Programmable Logic Controllers). A common control method in existing technologies is to directly connect the discrete I / O ports of the PLC to each actuator to achieve functions such as starting and stopping, forward and reverse rotation, and analog quantity adjustment of actuators such as motors and valves.

[0003] However, this approach requires allocating a separate I / O port for each function of each actuator. For example, if a single motor needs to perform four functions—start, stop, forward rotation, and reverse rotation—it would require four PLC I / O ports. Some actuators also require additional analog interfaces for speed or power regulation. As the complexity of roller coating machines increases, the amount of on-site wiring increases dramatically, leading not only to higher installation and commissioning costs but also making system maintenance and expansion difficult. Utility Model Content

[0004] This application provides a roller coating machine control system to improve the problem of excessive wiring required by traditional roller coating machine control systems.

[0005] In a first aspect, embodiments of this application provide a roller coating machine control system, including: PLC; The first switch has multiple network ports, one of which is connected to the PLC signal via a first bus. Multiple actuators are connected to multiple network ports of the first switch via multiple branch network cables; The PLC has a built-in control program that controls various functions of multiple actuators through the first bus and multiple branch network cables.

[0006] Optionally, the plurality of actuators includes a roller coating mechanism for roller coating, the roller coating mechanism being signal-connected to the first switch via the branch network cable.

[0007] Optionally, the roller coating mechanism includes a main driver and a main motor for driving the rubber roller to rotate and coat. The main driver is electrically connected to the main motor, and one network port of the first switch is signal-connected to the main driver through a branch network cable.

[0008] Optionally, the roller coating mechanism further includes a stirring motor and a stirring driver for stirring the coating material. The stirring driver is electrically connected to the stirring motor and is connected to a network port of the main driver via a branch network cable.

[0009] Optionally, the roller coating mechanism further includes a first lifting driver, a second lifting driver, a first lifting motor, and a second lifting motor for driving the roller to lift. The first lifting driver is electrically connected to the first lifting motor, and the second lifting driver is electrically connected to the second lifting motor. One mesh port of the first lifting driver is connected to one mesh port of the stirring driver through a branch mesh cable, and one mesh port of the second lifting driver is connected to the other mesh port of the first lifting driver through a branch mesh cable.

[0010] Optionally, the plurality of actuators includes a first distributed input / output module and a conveying module for driving the conveyor belt. The input port of the first distributed input / output module is connected to a port of the first switch via a branch network cable, and the output port of the first distributed input / output module is connected to a port of the conveying module via a branch network cable.

[0011] Optionally, the conveying module includes a first conveying driver and a first conveying motor for driving the lower conveyor belt, and a second conveying driver and a second conveying motor for driving the upper conveyor belt. The upper conveyor belt is located above the lower conveyor belt. The first conveying driver is electrically connected to the first conveying motor, and the second conveying driver is electrically connected to the second conveying motor. One network port of the first transmission driver is connected to the output network port of the first distributed input / output module via a branch network cable, and one network port of the second transmission driver is connected to one network port of the first transmission driver via a branch network cable.

[0012] Optionally, the plurality of actuators include a second distributed input / output module and a third conveyor driver and a third conveyor motor for driving the conveyor belt. The input port of the second distributed input / output module is connected to a port of the first switch via a branch network cable, and the output port of the second distributed input / output module is connected to a port of the third conveyor driver via a branch network cable. The third conveyor driver is electrically connected to the third conveyor motor.

[0013] Optionally, the plurality of actuators further includes a valve island, one of the network ports of which is connected to one of the network ports of the first switch via a branch network cable.

[0014] Optionally, the roller coating machine control system further includes a second switch, an IoT gateway, and a display. The second switch is connected to the PLC via a second bus, and the second switch is connected to the display and the IoT gateway via two branch network cables respectively.

[0015] Therefore, the embodiments of this application utilize a first bus to connect the first switch to the PLC signal, enabling the control program instructions built into the PLC to be uniformly sent through the first bus. Then, multiple network ports of the first switch are used to connect to multiple actuators, allowing each actuator to receive corresponding instructions from the PLC through the first switch. Furthermore, while a single actuator may perform multiple functions, it only needs to be connected via a single branch network cable to execute these multiple functions. Compared to traditional roller coating machine control systems, the control system of this application eliminates the need for point-to-point I / O input / output wiring to the PLC. For actuators with multi-functional control requirements, only a single branch network cable is needed to connect to the PLC through the first switch, and the control instructions built into the PLC can be used to control the actuator. This significantly reduces the amount and complexity of wiring, making installation, debugging, and subsequent maintenance simpler and faster. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the network architecture of a roller coating machine control system provided in this application embodiment; Figure 2 A control principle diagram of the first lifting driver of a roller coating machine control system provided in this application embodiment; Figure 3 The control principle diagram of the first switch of a roller coating machine control system provided in the embodiments of this application is shown. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] Please see Figure 1 This application provides a control system for a roller coating machine, including a PLC, a first switch, and multiple actuators. The first switch has multiple network ports, one of which is connected to the PLC via a first bus. The multiple actuators are connected to the multiple network ports of the first switch via multiple branch network cables. The PLC has a built-in control program that controls various functions of the multiple actuators via the first bus and the branch network cables.

[0021] The technical solution provided in this application connects a first switch to a PLC signal via a first bus, enabling the control program instructions built into the PLC to be uniformly sent through the first bus. Then, multiple network ports of the first switch are connected to multiple actuators, allowing each actuator to receive corresponding instructions from the PLC through the first switch. Furthermore, while a single actuator may perform multiple functions, it only needs to be connected via a single branch network cable to execute these multiple functions. Compared to traditional roller coating machine control systems, this application's control system eliminates the need for point-to-point I / O input / output wiring to the PLC. For actuators with multi-functional control requirements, only a single branch network cable is needed to connect to the PLC via the first switch, and the control instructions built into the PLC can be used to control the actuator. This significantly reduces the amount and complexity of wiring, making installation, debugging, and subsequent maintenance simpler and faster.

[0022] In some embodiments, see Figure 1Among the multiple actuators, a roller coating mechanism may be included, which is connected to the network port signal of the first switch via a branch network cable. The roller coating mechanism contains corresponding driver and motor combinations, such as a main driver and main motor, an agitator driver and agitator motor, and a lifting driver and lifting motor. These drivers, as nodes with network communication capabilities, are directly connected to the first switch. Internally, they are connected to their respective motors via power lines. After the PLC sends control commands to the first switch via the first bus, the first switch forwards the corresponding signals to each driver within the roller coating mechanism. The drivers then parse and convert these signals into power outputs to the motors, enabling control of motor start / stop, speed adjustment, forward / reverse rotation, and lifting / lowering actions. With the above settings, multiple sub-units of the roller coating mechanism can be uniformly connected to the first switch via branch network cables, and each sub-unit's driver only needs one branch network cable to connect to the network. This avoids point-to-point wiring to the PLC's I / O ports as in traditional control methods, effectively reducing system wiring complexity and improving the overall integration and scalability of the roller coating mechanism. When the roller coating machine needs to add or replace a sub-unit, it is only necessary to connect a new branch network cable to the switch port and complete the corresponding configuration in the PLC program to complete the expansion or adjustment. This ensures multi-functional control of the roller coating action and improves the system's flexibility and reliability.

[0023] Further, please see Figure 1 The roller coating mechanism includes a main driver and a main motor for driving the rubber roller to rotate and coat the coating. The main driver is electrically connected to the main motor via a power line and is also connected to a branch network cable via its network communication port. The other end of the branch network cable is connected to a network port of a first switch. When the PLC sends a command to the first switch via the first bus, the first switch forwards the command to the main driver. After receiving the command, the main driver parses it and outputs the corresponding power signal to the main motor according to the command, thereby realizing the start-stop control, speed adjustment, and rotation direction control of the main motor to drive the rubber roller to complete the roller coating operation on the surface of leather, cloth, or film. This structure directly connects the main driver to the network as an execution node with communication function, so that multiple functions of the main motor can be connected to the PLC through a branch network cable. Compared with the traditional method of requiring multiple I / O ports to control the start-stop and forward / reverse rotation of the motor separately, it is beneficial to reduce the number of wires and simplify the wiring operation.

[0024] It should be noted that a frequency converter can be used for the main drive, such as the Huichuan MD800 medium and small power frequency converter.

[0025] Furthermore, please see Figure 1The roller coating mechanism also includes a stirring motor and a stirring driver for mixing the coating material. The stirring driver is electrically connected to the stirring motor via a power line and signal-connected to a branch network cable via its communication port. The other end of this branch network cable is connected to a network port of the main driver, thus enabling the stirring driver to form a cascaded connection with the main driver as a downstream node. When the PLC sends control commands to the first switch via the first bus, the switch forwards the commands to the main driver. The main driver then transmits the commands to the stirring driver via its downstream network port. After parsing the commands, the stirring driver drives the stirring motor to run, achieving continuous mixing of the coating material before use and during the coating process, ensuring uniform coating composition and preventing sedimentation or stratification. The stirring driver does not need to occupy a separate port of the first switch; instead, it can be connected to the system through cascading with the main driver. This allows a limited number of switch ports to simultaneously serve more actuators, improving network resource utilization and simplifying cabling. Furthermore, it also helps to shorten the length of a single network cable in terms of physical location.

[0026] In some embodiments, see Figure 1 The roller coating mechanism also includes a first lifting driver, a second lifting driver, a first lifting motor, and a second lifting motor for driving the rubber roller to rise and fall. The first lifting driver is electrically connected to the first lifting motor via a power line, and the second lifting driver is also electrically connected to the second lifting motor via a power line. One network port of the first lifting driver is connected to one network port of the stirring driver via a branch network cable, and one network port of the second lifting driver is connected to the other network port of the first lifting driver via a branch network cable. This allows the two sets of lifting drivers to be cascaded into the network. When the PLC sends control commands to the first switch via the first bus, the commands are transmitted sequentially through the switch, the main driver, and the stirring driver to the first and second lifting drivers. Upon receiving the commands, the two drivers respectively parse and drive the corresponding lifting motors to operate, achieving precise lifting control of the rubber roller. With this structure, the lifting drivers do not need to occupy individual switch ports; instead, they are connected to the system in a chain-cascade manner, improving port utilization efficiency and facilitating installation and expansion.

[0027] It should be noted that the first lifting driver, second lifting driver, first lifting motor, second lifting motor, stirring motor, stirring driver, main driver, and main motor are all mechanisms used to directly achieve roller coating. When programming these mechanisms, they can be placed under the same main program, and then different subroutines can be used to control different mechanisms. This ensures that although this part of the program needs to be transmitted level by level through the network cable, it will not interfere with mechanisms not controlled by this specific program segment. That is, a corresponding program segment will only control the corresponding mechanism. For example, the instruction program used to drive the second lifting motor will only be parsed by the second lifting driver, even if this program segment passes through the preceding main driver and first lifting driver, it will not affect them. In other words, in terms of physical connection, multiple mechanisms are cascaded, but the internal network architecture is essentially a parallel architecture of multiple mechanisms and the PLC.

[0028] In some embodiments, see Figure 1 The system comprises multiple actuators, including a first distributed input / output module and a conveyor module for driving the conveyor belt. The input port of the first distributed input / output module is connected to a port of the first switch via a branch network cable, and its output port is connected to a port of the conveyor module via another branch network cable, allowing the conveyor module to act as a downstream node of the first distributed input / output module in the network. When the PLC sends control commands to the first switch via the first bus, the first switch forwards the commands to the first distributed input / output module. After completing protocol parsing or signal relay, the module transmits the commands to the conveyor module, where its built-in driver parses and drives the corresponding conveyor motor, thus controlling the start, stop, and speed adjustment of the conveyor belt. In essence, the first distributed input / output module not only serves as a remote network access point but also centrally collects and processes signals from surrounding sensors and switching signals, communicating uniformly with the PLC. This significantly reduces the number of branch network cables directly from the PLC, simplifying the system wiring.

[0029] Furthermore, the conveying module includes a first conveyor driver and a first conveyor motor for driving the lower conveyor belt, and a second conveyor driver and a second conveyor motor for driving the upper conveyor belt. The upper conveyor belt is located above the lower conveyor belt. The first conveyor driver is electrically connected to the first conveyor motor via a power line, and the second conveyor driver is electrically connected to the second conveyor motor via a power line. One network port of the first conveyor driver is connected to the output network port of the first distributed input / output module via a branch network cable, and one network port of the second conveyor driver is connected to the other network port of the first conveyor driver via a branch network cable, allowing the two conveyor drivers to be connected to the network in a daisy-chain cascade manner. When the PLC sends control commands to the first switch via the first bus, the switch transmits the commands to the first conveyor driver via the first distributed input / output module, and then the first conveyor driver forwards them to the second conveyor driver via its downstream network port. After parsing the commands, the two drivers control the corresponding conveyor motors to operate, thereby achieving coordinated transmission and independent adjustment of the upper and lower conveyor belts.

[0030] In some embodiments, see Figure 1 The system comprises multiple actuators, including a second distributed input / output module, a third conveyor driver, and a third conveyor motor for driving the splicing conveyor belt. The third conveyor driver is electrically connected to the third conveyor motor via a power line. The input port of the second distributed input / output module is connected to a network port of the first switch via a branch network cable, and its output port is connected to a network port of the third conveyor driver via another branch network cable, enabling the third conveyor driver to access the network as a downstream node of the second distributed input / output module. When the PLC sends control commands to the first switch via the first bus, the switch transmits the commands to the second distributed input / output module. After completing protocol parsing or signal relay, the module forwards the commands to the third conveyor driver. The third conveyor driver, upon receiving and parsing the commands, drives the third conveyor motor to operate, achieving start / stop and speed regulation control of the splicing conveyor belt. Through this structure, the second distributed input / output module can serve as a remote access point for the splicing conveyor unit, centrally collecting sensor and switch signals from the surrounding splicing station, while also providing network connectivity for the third conveyor driver, enabling the PLC to remotely and precisely control the operating status of the splicing conveyor belt.

[0031] It should be noted that both the first and second distributed input / output modules can use remote I / O couplers that support EtherCAT or industrial Ethernet protocols.

[0032] In some embodiments, see Figure 1The system also includes multiple actuators, including a valve island. As a device for centralized control of pneumatic components, the valve island integrates multiple solenoid valves, each capable of independent opening and closing control via network commands. One network port of the valve island is connected to a network port of the first switch via a branch network cable, allowing the valve island to directly access the system as a node with network communication capabilities. When the PLC sends control commands to the first switch via the first bus, the first switch transmits the commands to the valve island. The control unit built into the valve island parses the commands and drives the corresponding solenoid valves to actuate, thereby achieving precise control of the clamping cylinder, holding cylinder, or other pneumatic actuators. Centralized control of pneumatic components eliminates the need to occupy multiple discrete I / O ports of the PLC. Instead, unified management of multiple pneumatic functions is achieved through a single-point connection between the valve island and the switch, simplifying the wiring structure and reducing the consumption of hardware interface resources.

[0033] In some embodiments, see Figure 1 The roller coating machine control system also includes a second switch, an IoT gateway, and a display. The second switch is connected to the PLC via a second bus, and its two network ports are connected to the IoT gateway and the display via branch network cables, respectively. When the PLC transmits control data and operating status information to the second switch via the second bus, the switch can forward the operating data to the display for real-time display and operation input on the human-machine interface. Simultaneously, it can upload relevant parameters and fault information to the IoT gateway, which then transmits the information to a remote server or monitoring terminal via wireless or wired communication, thereby achieving remote monitoring and data management.

[0034] In some embodiments, see Figure 1 The system also includes multiple actuators, such as pressure sensors and heating mechanisms. Specifically, the PLC connects to the pressure sensors and heating mechanisms via RS485 communication. The pressure sensors are located near the heating element of the heating mechanism or near some of the cylinder actuators to detect the internal pressure of the heating element or the air pressure in the cylinder, and feed the detection data back to the PLC via the RS485 bus. The heating mechanism includes a heating wire, an oil pump, and contactors for controlling the on / off state of the heating wire and oil pump. The PLC sends temperature control commands to the heating mechanism via the RS485 bus. Upon receiving the control signal, the heating mechanism drives the contactors to adjust the heating power of the heating wire and the operating status of the oil pump to ensure stable temperature and fluid supply required for roller coating.

[0035] It should be noted that both the first and second lifting drives can be servo drives, model SV630NS1R6I. The stirring drive can also be a servo drive based on EtherCAT communication.

[0036] To better understand the technical solution of this application, this application selects a portion of the network connection principle structure of the multiple actuators and the network connection principle structure of the first switch for detailed illustration: Please see Figure 2 The first lifting drive uses an INOVANCE SV630SN1R6I servo drive, whose power input is connected to the external power grid via at least two phases of a three-phase AC power supply (L1, L2, L3). The motor output of the first lifting drive is electrically connected to the first lifting motor M8 via three-phase output lines (U, V, W), providing start / stop, forward / reverse rotation, and torque control for the motor. Furthermore, the first lifting drive is connected to a motor encoder; the encoder's feedback signal is transmitted back to the first lifting drive through a dedicated encoder interface to achieve closed-loop control of the motor's operating status. The first lifting drive's communication port is equipped with an EtherCAT interface, which connects to an industrial Ethernet network via an RJ45 port, establishing real-time communication with the host PLC and the first switch. This allows the PLC to directly send lifting control commands to the first lifting drive via the network. After receiving the commands, the first lifting drive parses and outputs the corresponding current signal to drive the motor, thereby achieving precise control of the rubber roller lifting. In addition, the first lifting driver is also equipped with digital input / output interfaces, such as input terminals I1, I2, and I3, and output terminals DO1 and DO2. The input terminals can be connected to external sensors or push-button switches, and the output terminals can be used to link external relay KA1. When the PLC sends a braking command through EtherCAT communication, the first lifting driver can control the relay to act, thereby realizing the on / off control of the BK1 brake, thus ensuring that the rubber roller can be reliably locked when lifting and stopping, improving the safety and stability of operation.

[0037] The second lift driver has the same structure as the first lift driver. The only difference is that the second lift driver has only one network port for connecting the network cable, and the other network ports can be left unused. The first lift driver has two network ports for connecting the network cable. Therefore, the network connection principle and structure of the second lift driver will not be described in detail here.

[0038] Please see Figure 3The first switch, model SW4-ECP06, serves as the core network distribution unit. Its power ports are connected to both / 24V_12 and / 0V_12 power supplies, providing a stable DC power supply for the switch and its downstream network devices. The switch's input port IN is connected to the host PLC or control module via network cable CAT1, enabling the input of control commands and data from the PLC. The switch's multiple output ports are connected to the communication interfaces of different actuators. Port OUT1 is connected to the distributed input / output module of the conveyor belt feeding section via network cable CAT0, which then drives the upper and lower conveyor drivers of the conveyor belt. Port OUT2 is connected to the main driver of the main body section via network cable CAT1, enabling precise control of the main motor of the roller coating mechanism. Port OUT4 is connected to the distributed input / output module of the receiving section via network cable CAT2, driving the receiving conveyor belt. Port OUT5 is connected to the valve island via network cable CAT3, enabling centralized control of multiple pneumatic components.

[0039] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0040] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0041] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0042] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0043] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control system for a roller coating machine, characterized in that, include: PLC; The first switch has multiple network ports, one of which is connected to the PLC signal via a first bus. Multiple actuators are connected to multiple network ports of the first switch via multiple branch network cables; The PLC has a built-in control program that controls various functions of multiple actuators via the first bus and multiple branch network cables. The multiple actuators include a roller coating mechanism for roller coating, which is connected to the first switch via the branch network cables. The roller coating mechanism includes a main driver and a main motor for driving the rubber roller to rotate during coating. The main driver is electrically connected to the main motor, and one network port of the first switch is connected to the main driver via one of the branch network cables. The roller coating mechanism also includes a stirring motor and a stirring driver for stirring the coating material. The stirring driver is electrically connected to the stirring motor, and the stirring driver is connected to one network port of the main driver via one of the branch network cables.

2. The roller coating machine control system according to claim 1, characterized in that, The roller coating mechanism further includes a first lifting driver, a second lifting driver, a first lifting motor, and a second lifting motor for driving the roller to lift. The first lifting driver is electrically connected to the first lifting motor, and the second lifting driver is electrically connected to the second lifting motor. One mesh port of the first lifting driver is connected to one mesh port of the stirring driver through a branch mesh cable, and one mesh port of the second lifting driver is connected to the other mesh port of the first lifting driver through a branch mesh cable.

3. The roller coating machine control system according to claim 1 or 2, characterized in that, The plurality of actuators include a first distributed input / output module and a conveying module for driving the conveyor belt. The input port of the first distributed input / output module is connected to a port of the first switch via a branch network cable, and the output port of the first distributed input / output module is connected to a port of the conveying module via a branch network cable.

4. The roller coating machine control system according to claim 3, characterized in that, The conveying module includes a first conveying driver and a first conveying motor for driving the lower conveyor belt, and a second conveying driver and a second conveying motor for driving the upper conveyor belt. The upper conveyor belt is located above the lower conveyor belt. The first conveying driver is electrically connected to the first conveying motor, and the second conveying driver is electrically connected to the second conveying motor. One network port of the first transmission driver is connected to the output network port of the first distributed input / output module via a branch network cable, and one network port of the second transmission driver is connected to one network port of the first transmission driver via a branch network cable.

5. The roller coating machine control system according to claim 1 or 2, characterized in that, The plurality of actuators include a second distributed input / output module and a third conveyor driver and a third conveyor motor for driving the conveyor belt. The input port of the second distributed input / output module is connected to a port of the first switch via a branch network cable, and the output port of the second distributed input / output module is connected to a port of the third conveyor driver via a branch network cable. The third conveyor driver is electrically connected to the third conveyor motor.

6. The roller coating machine control system according to claim 1 or 2, characterized in that, The plurality of actuators also include a valve island, one of the network ports of which is connected to one of the network ports of the first switch via a branch network cable.

7. The roller coating machine control system according to claim 1 or 2, characterized in that, The control system of the roller coating machine also includes a second switch, an IoT gateway, and a display. The second switch is connected to the PLC via a second bus, and the second switch is connected to the display and the IoT gateway via two branch network cables respectively.

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