CN111565197A - Communication system and method for production equipment - Google Patents

Communication system and method for production equipment Download PDF

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Publication number
CN111565197A
CN111565197A CN202010469669.0A CN202010469669A CN111565197A CN 111565197 A CN111565197 A CN 111565197A CN 202010469669 A CN202010469669 A CN 202010469669A CN 111565197 A CN111565197 A CN 111565197A
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Prior art keywords
protocol network
upper computer
module
equipment
production
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CN202010469669.0A
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Inventor
杜庞飞
龙万平
陈爱民
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Huaxingyuanchuang Chengdu Technology Co ltd
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Huaxingyuanchuang Chengdu Technology Co ltd
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Priority to CN202010469669.0A priority Critical patent/CN111565197A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/26—Special purpose or proprietary protocols or architectures

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computing Systems (AREA)
  • Programmable Controllers (AREA)

Abstract

The embodiment of the invention discloses a communication system and a communication method of production equipment. The communication system of the production equipment connects the programmable logic controller with the MC protocol network module and connects the programmable logic controller with the EIP protocol network module; the network switch connects the MC protocol network module, the EIP protocol communication module and the upper computer to the same local area network. Therefore, the equipment production information of the programmable logic controller can be uploaded to the upper computer through the MC protocol network module, and the equipment interaction information of the programmable logic controller is uploaded to the upper computer through the EIP protocol network module; the problem that real-time response is easy to delay in the communication process between the programmable logic controller and the upper computer is solved, and the communication efficiency between the programmable logic controller and the upper computer is improved.

Description

Communication system and method for production equipment
Technical Field
The embodiment of the invention relates to a communication technology of production equipment, in particular to a communication system and a communication method of the production equipment.
Background
With the large-scale application of the computer integrated manufacturing system in the production factory, the collection types of the production information of the production equipment are more and more, the collection quantity is larger and the requirement of the response speed between the production equipment is higher and higher.
At present, production equipment generally adopts a logic controller to realize production control, and the production data of the equipment is uploaded to a computer integrated manufacturing system through communication with an upper computer. The existing communication between the logic controller and the upper computer adopts a single protocol communication method, and the real-time response in the communication process is delayed in the face of a large amount of data of production equipment.
Disclosure of Invention
The embodiment of the invention provides a communication system and a communication method of production equipment, which are used for improving the communication efficiency between a programmable logic controller and an upper computer.
In a first aspect, an embodiment of the present invention provides a communication system of a production device, where the communication system of the production device includes: the system comprises a programmable logic controller, an MC protocol network module, an EIP protocol network module, a network switch and an upper computer;
the programmable logic controller is connected with the MC protocol network module and the EIP protocol network module;
the network switch is connected with the MC protocol network module, the network switch is connected with the EIP protocol network module, and the network switch is connected with the upper computer; the network switch is used for connecting the MC protocol network module, the EIP protocol communication module and the upper computer to the same local area network; equipment production information of the programmable logic controller is uploaded to an upper computer through an MC protocol network module; and uploading the equipment interaction information of the programmable logic controller to an upper computer through an EIP protocol network module.
Optionally, the programmable logic controller comprises a classification module and an upload module;
the classification module is used for classifying the data information of the production equipment into equipment production information and equipment interaction information;
the uploading module is used for uploading the equipment production information to the MC protocol network module and uploading the equipment interaction information to the EIP protocol network module.
Optionally, the upper computer includes an MC protocol network configuration module and an EIP protocol network configuration module;
the MC protocol network configuration module is used for providing a configuration environment of the MC protocol network module;
the EIP protocol network configuration module is used for providing a configuration environment of the EIP protocol network module.
Optionally, the programmable logic controller includes a bus backplane, and the MC protocol network module and the EIP protocol network module are respectively disposed in a backplane bus slot of the bus backplane.
Optionally, the network switch is a 16-port gigabit switch.
Optionally, the communication system of the production device further includes a power adapter, the power adapter is connected to the network switch, and the power adapter is configured to supply power to the network switch;
the programmable logic controller comprises a power supply unit, and the power supply unit is used for supplying power to the programmable logic controller.
In a second aspect, an embodiment of the present invention further provides a communication method for a production device, which is applied to the communication system of any one of the production devices in the first aspect, where the communication method for the production device includes:
the programmable logic controller uploads the equipment production information to an upper computer through an MC protocol network;
and the programmable logic controller uploads the equipment interaction information to the upper computer through an EIP protocol network.
Optionally, the programmable logic controller uploads the device production information to the upper computer through the MC protocol network, and before uploading the device interaction information to the upper computer through the EIP protocol network, the method further includes: and classifying the data information of the production equipment into equipment production information and equipment interaction information.
Optionally, the programmable logic controller uploads the device production information to the upper computer through the MC protocol network, and before uploading the device interaction information to the upper computer through the EIP protocol network, the method further includes:
an MC protocol network environment and an EIP protocol network environment are configured in the upper computer.
Optionally, after the MC protocol network environment and the EIP protocol network environment are configured in the upper computer, the method further includes:
and the programmable logic controller, the MC protocol network environment, the EIP protocol network environment and the upper computer are configured in the same local area network by using a network switch.
In the communication system of the production equipment provided by the embodiment of the invention, the programmable logic controller is connected with the MC protocol network module, and the programmable logic controller is connected with the EIP protocol network module; the network switch connects the MC protocol network module, the EIP protocol communication module and the upper computer to the same local area network. Therefore, the equipment production information of the programmable logic controller can be uploaded to the upper computer through the MC protocol network module, and the equipment interaction information of the programmable logic controller is uploaded to the upper computer through the EIP protocol network module; the problem that a single-protocol communication method is adopted between the programmable logic controller and the upper computer, a large amount of data information of production equipment needs to be faced, and time delay occurs in real-time response in the communication process is solved, and the communication efficiency between the programmable logic controller and the upper computer is improved.
Drawings
Fig. 1 is a schematic structural diagram of a communication system of a production apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a communication system of another production apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication system of another production apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a communication system of another production apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a communication system of another production apparatus according to an embodiment of the present invention;
FIG. 6 is a flowchart of a communication method of a manufacturing apparatus according to an embodiment of the present invention;
FIG. 7 is a flow chart of another communication method of a manufacturing device according to an embodiment of the present invention;
FIG. 8 is a flow chart of another communication method of a manufacturing device according to an embodiment of the present invention;
fig. 9 is a flowchart of another communication method of a manufacturing apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The communication system and the communication method of the production equipment provided by the embodiment of the invention can be suitable for production factories and scenes needing efficient acquisition of production data of the production equipment and real-time and high-speed refreshing of interactive information of the production equipment. Fig. 1 is a schematic structural diagram of a communication system of a production device according to an embodiment of the present invention, and as shown in fig. 1, the communication system of the production device includes: the system comprises a programmable logic controller (10), an MC protocol network module (20), an EIP protocol network module (30), a network switch (40) and an upper computer (50);
the programmable logic controller 10 is connected with the MC protocol network module 20, and the programmable logic controller 10 is connected with the EIP protocol network module 30;
the network switch 40 is connected with the MC protocol network module 20, the network switch 40 is connected with the EIP protocol network module 30, and the network switch 40 is connected with the upper computer 50; the network switch 40 is used for connecting the MC protocol network module 20, the EIP protocol communication module and the upper computer 50 to the same local area network; the equipment production information of the programmable logic controller 10 is uploaded to the upper computer 50 through the MC protocol network module 20; and uploading the equipment interaction information of the programmable logic controller 10 to the upper computer 50 through the EIP protocol network module 30.
Specifically, in Computer Integrated Manufacturing (CIM), a Programmable Logic Controller (PLC) 10 is connected to the production equipment, and the PLC controls the production equipment to produce and simultaneously acquires various data information of the production equipment in the production process, and transmits the acquired data information to the upper Computer 50. The data information comprises production information of the production equipment in the production process, namely equipment production information; the method also comprises interactive information during communication among the production devices, namely device interactive information. The information of the equipment production information is large and complicated, and the equipment interaction information belongs to key information in a large amount of data information and has higher requirement on instantaneity. Therefore, when a large amount of the device production information and the device interaction information are transmitted and processed in the single protocol communication between the PLC and the upper computer 50, the transmission efficiency of the device production information and the real-time property of the device interaction information are hardly satisfied.
In view of this, in the embodiment, the PLC is connected to the MC protocol network module 20, the MC protocol network module 20 is compatible with the PLC, the PLC is connected to the EIP protocol network module 30, the EIP protocol network module 30 is compatible with the PLC, the MC protocol network module 20 is more suitable for communication of device production information with large information amount and complexity, and the EIP protocol network module 30 is more suitable for communication of device interaction information with high real-time requirement. Meanwhile, a network switch 40 is provided, and the network switch 40 is configured to support the MC protocol network and the EIP protocol network, and connect the MC protocol network module 20, the EIP protocol network module 30, and the upper computer 50 to the same local area network. Therefore, the PLC transmits the equipment production information acquired from the production equipment to the upper computer 50 through the MC protocol network, so that the acquisition of the equipment production information by the upper computer 50 is met, and the equipment interaction information acquired from the production equipment is transmitted to the upper computer 50 through the EIP protocol network by the PLC so as to meet the real-time refreshing of the equipment interaction information. The PLC transmits the equipment production information required to be collected by the upper computer 50 and the equipment interaction information required to be refreshed in real time to the upper computer 50 in a network communication mode of double protocols, so that the collection of the equipment production data and the real-time response of the equipment interaction information are not influenced mutually in the process of transmitting a large amount of data information, the transmission efficiency of the equipment production information is ensured, the real-time response of the equipment interaction information is also ensured, and the communication efficiency between the PLC and the upper computer 50 is greatly improved.
According to the communication system of the production equipment provided by the embodiment of the invention, a PLC is connected with an MC protocol network module and is simultaneously connected with an EIP protocol network module; the network switch connects the MC protocol network module, the EIP protocol communication module and the upper computer to the same local area network. Therefore, the embodiment of the invention enables the equipment production information of the PLC to be uploaded to the upper computer through the MC protocol network module, and the equipment interaction information is uploaded to the upper computer through the EIP protocol network module; the problems that due to the fact that a single-protocol communication method is adopted between the PLC and the upper computer, a large amount of data information of production equipment is difficult to transmit and process in real time, and real-time response is delayed in the communication process are solved, and the communication efficiency between the PLC and the upper computer is improved.
Fig. 2 is a schematic structural diagram of a communication system of another production apparatus according to an embodiment of the present invention, as shown in fig. 2, optionally, the programmable logic controller 10 includes a classification module 11 and an upload module 12;
the classification module 11 is configured to classify data information of the production device into device production information and device interaction information;
the upload module 12 is configured to upload device production information to the MC protocol network module 20 and upload device interaction information to the EIP protocol network module 30.
Specifically, the PLC controls the production equipment to produce and simultaneously acquires various types of data information of the production equipment during the production process, and when acquiring the data information, the PLC may classify the data information into equipment production information and equipment interaction information by the classification module 11. The uploading module 12 uploads the equipment production information to the MC protocol network module 20 so as to upload the equipment production information to the upper computer 50 through the MC protocol network module 20; and the uploading module 12 uploads the device interaction information to the EIP protocol network module 30, so as to upload the device interaction information to the upper computer 50 through the EIP protocol network module 30.
Fig. 3 is a schematic structural diagram of a communication system of another production apparatus according to an embodiment of the present invention, and as shown in fig. 3, optionally, the upper computer 50 includes an MC protocol network configuration module 51 and an EIP protocol network configuration module 52;
the MC protocol network configuration module 51 is used for providing a configuration environment of the MC protocol network module 20;
the EIP protocol network configuration module 52 is used to provide a configuration environment for the EIP protocol network module 30.
Specifically, on the basis of setting the connection between the PLC and the MC protocol network module 20 and the connection between the PLC and the EIP protocol network module 30, the MC protocol network configuration module 51 is set in the upper computer 50 to provide a configuration environment of the MC protocol network module 20; the EIP protocol network configuration module 52 is arranged in the upper computer 50 to provide a configuration environment for the EIP protocol network module 30, so that MC protocol network communication and EIP protocol network communication can be completely supported and realized between the PLC and the upper computer 50, and the communication efficiency and reliable connection between the PLC and the upper computer 50 are improved.
Fig. 4 is a schematic diagram of a communication system structure of another production apparatus according to an embodiment of the present invention, as shown in fig. 4, optionally, the programmable logic controller 10 includes a bus backplane 1, and the MC protocol network module 20 and the EIP protocol network module 30 are respectively disposed in backplane bus slots of the bus backplane, and exemplarily, the MC protocol network module 20 is disposed in the backplane bus slot 2, and the EIP protocol network module 30 is disposed in the backplane bus slot 3.
Specifically, in the physical link layer, the MC protocol network module 20 and the EIP protocol network module 30 may be respectively disposed in a backplane bus slot of a bus backplane of the PLC, so that the complexity of the physical link is not increased while the communication efficiency between the PLC and the upper computer 50 is improved.
Alternatively, network switch 40 is a 16-port gigabit switch.
Specifically, the network switch 40 may be selected to be a 16-port gigabit switch, so as to reduce the cost of the communication system of the production equipment while meeting the requirement of high bandwidth.
Fig. 5 is a schematic structural diagram of another communication system of a production device according to an embodiment of the present invention, as shown in fig. 5, optionally, the communication system of the production device further includes a power adapter 41, the power adapter 41 is connected to the network switch 40, and the power adapter 41 is configured to supply power to the network switch 40;
the programmable logic controller 10 includes a power supply unit 13, and the power supply unit 13 is configured to supply power to the programmable logic controller 10.
Specifically, when the power adapter of the network switch 40 selects OMRON-S8VK-C48024, the 16-prong switch may select NETGEAR-GS 316. Here, the bus backplane illustratively selects Mitsubishi-Q38B, PLC Q13UDVCPU, PLC compatible CP1W-CIF41 MC protocol network module 20, PLC compatible QJ71E71-100 EIP protocol network module 30, and Precision T5820 upper computer 50.
In the communication system of the production equipment provided by the embodiment of the invention, the MC protocol network module compatible with the PLC is arranged in the back plate bus slot of the PLC, and the EIP protocol network module compatible with the PLC is arranged in the back plate bus slot of the PLC. When the PLC acquires a large amount of data information from production equipment, a classification module in the PLC classifies the data information into equipment production information and equipment interaction information, and uploads the equipment production information and the equipment interaction information to an MC protocol network configuration module and an MC protocol network module through an uploading module respectively. Therefore, the embodiment of the invention enables the PLC to upload the equipment production information to the upper computer through the MC protocol network module without being influenced by the equipment interaction information, so that the high-efficiency acquisition of the equipment production information by the upper computer is met, the equipment interaction information is uploaded to the upper computer through the EIP protocol network module, the real-time response to the equipment interaction information is met, and the communication efficiency between the PLC and the upper computer is improved.
An embodiment of the present invention further provides a communication method of a production device, which is applied to the communication system of any production device, fig. 6 is a flowchart of the communication method of the production device provided in the embodiment of the present invention, as shown in fig. 6, and with reference to fig. 1, the communication method of the production device includes:
s10, the programmable logic controller uploads the equipment production information to an upper computer through an MC protocol network; and the programmable logic controller uploads the equipment interaction information to the upper computer through an EIP protocol network.
According to the communication method of the production equipment provided by the embodiment of the invention, the PLC controls the production equipment to produce and simultaneously acquires various data information of the production equipment in the production process. The PLC transmits the equipment production information acquired from the production equipment to the upper computer through the MC protocol network, so that the acquisition of the equipment production information by the upper computer is met, and the PLC transmits the equipment interaction information acquired from the production equipment to the upper computer through the EIP protocol network, so that the real-time refreshing of the equipment interaction information is met. The PLC transmits the equipment production information required to be acquired by the upper computer and the equipment interaction information required to be refreshed in real time to the upper computer in a network communication mode of double protocols, so that the acquisition of the equipment production data and the real-time response of the equipment interaction information are not influenced mutually in the process of transmitting a large amount of data information, the transmission efficiency of the equipment production information is ensured, the real-time response of the equipment interaction information is also ensured, and the communication efficiency between the PLC and the upper computer is improved.
Optionally, the programmable logic controller uploads the device production information to the upper computer through the MC protocol network, and before uploading the device interaction information to the upper computer through the EIP protocol network, the method further includes: and classifying the data information of the production equipment into equipment production information and equipment interaction information. Fig. 7 is a flowchart of another communication method of a manufacturing device according to an embodiment of the present invention, as shown in fig. 7 in conjunction with fig. 2, the communication method of the manufacturing device includes:
and S20, classifying the data information of the production equipment into equipment production information and equipment interaction information.
Specifically, when the PLC acquires the data information, the data information may be classified into device production information and device interaction information.
S21, the programmable logic controller uploads the equipment production information to an upper computer through an MC protocol network; and the programmable logic controller uploads the equipment interaction information to the upper computer through an EIP protocol network.
Specifically, the PLC uploads the device production information to the MC protocol network module 20, and the MC protocol network module 20 uploads the device production information to the upper computer; and uploading the equipment interaction information to the EIP protocol network module 30, and uploading the equipment interaction information to the upper computer through the EIP protocol network module 30.
Optionally, the programmable logic controller uploads the device production information to the upper computer through the MC protocol network, and before uploading the device interaction information to the upper computer through the EIP protocol network, the method further includes: an MC protocol network environment and an EIP protocol network environment are configured in the upper computer. Fig. 8 is a flowchart of another communication method of a manufacturing device according to an embodiment of the present invention, as shown in fig. 8 in combination with fig. 3, the communication method of the manufacturing device includes:
and S30, configuring an MC protocol network environment and an EIP protocol network environment in the upper computer.
Specifically, an MC protocol network environment and an EIP protocol network environment are respectively configured in the upper computer, so that MC protocol network communication and EIP protocol network communication can be completely supported and realized between the PLC and the upper computer, and the communication efficiency between the PLC and the upper computer is improved.
S31, the programmable logic controller uploads the equipment production information to an upper computer through an MC protocol network; and the programmable logic controller uploads the equipment interaction information to the upper computer through an EIP protocol network.
Optionally, after the MC protocol network environment and the EIP protocol network environment are configured in the upper computer, the method further includes: and the programmable logic controller, the MC protocol network environment, the EIP protocol network environment and the upper computer are configured in the same local area network by using a network switch. Fig. 9 is another communication method of a production device according to an embodiment of the present invention, as shown in fig. 9, and with reference to fig. 1 and fig. 3, the communication method of the production device includes:
and S40, configuring an MC protocol network environment and an EIP protocol network environment in the upper computer.
And S41, configuring the programmable logic controller, the MC protocol network environment, the EIP protocol network environment and the upper computer in the same local area network by using a network switch.
Specifically, with a network switch 40, the network switch 40 is configured to support the MC protocol network and the EIP protocol network, and the MC protocol network module 20, the EIP protocol network module 30, and the upper computer are connected to the same lan through the network switch 40.
S42, the programmable logic controller uploads the equipment production information to an upper computer through an MC protocol network; and the programmable logic controller uploads the equipment interaction information to the upper computer through an EIP protocol network.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A communication system for a manufacturing facility, comprising: the system comprises a programmable logic controller, an MC protocol network module, an EIP protocol network module, a network switch and an upper computer;
the programmable logic controller is connected with the MC protocol network module, and the programmable logic controller is connected with the EIP protocol network module;
the network switch is connected with the MC protocol network module, the network switch is connected with the EIP protocol network module, and the network switch is connected with the upper computer; the network switch is used for connecting the MC protocol network module, the EIP protocol communication module and the upper computer to the same local area network; uploading the equipment production information of the programmable logic controller to the upper computer through the MC protocol network module; and uploading the equipment interaction information of the programmable logic controller to the upper computer through the EIP protocol network module.
2. The communication system of claim 1, wherein the programmable logic controller comprises a sorting module and an uploading module;
the classification module is used for classifying the data information of the production equipment into the equipment production information and the equipment interaction information;
the uploading module is used for uploading the equipment production information to the MC protocol network module and uploading the equipment interaction information to the EIP protocol network module.
3. The communication system of the production equipment according to claim 1, wherein the upper computer comprises an MC protocol network configuration module and an EIP protocol network configuration module;
the MC protocol network configuration module is used for providing a configuration environment of the MC protocol network module;
the EIP protocol network configuration module is used for providing a configuration environment of the EIP protocol network module.
4. The communication system of claim 1, wherein the programmable logic controller comprises a bus backplane, and the MC protocol network module and the EIP protocol network module are respectively disposed in backplane bus slots of the bus backplane.
5. The communication system of a manufacturing facility of claim 1 wherein the network switch is a 16-port gigabit switch.
6. The communication system of the production equipment according to claim 1, further comprising a power adapter connected to the network switch, the power adapter being configured to supply power to the network switch;
the programmable logic controller comprises a power supply unit, and the power supply unit is used for supplying power to the programmable logic controller.
7. A communication method of a production device, which is applied to the communication system of any one of the production devices of claims 1 to 6, the communication method of the production device comprising:
the programmable logic controller uploads the equipment production information to the upper computer through an MC protocol network;
and the programmable logic controller uploads the equipment interaction information to the upper computer through an EIP protocol network.
8. The communication method of the production equipment according to claim 7, wherein before the plc uploads the equipment production information to the upper computer through an MC protocol network and uploads the equipment interaction information to the upper computer through an EIP protocol network, the method further comprises: and classifying the data information of the production equipment into the equipment production information and the equipment interaction information.
9. The communication method of the production equipment according to claim 7, wherein before the plc uploads the equipment production information to the upper computer through an MC protocol network and uploads the equipment interaction information to the upper computer through an EIP protocol network, the method further comprises:
and an MC protocol network environment and an EIP protocol network environment are configured in the upper computer.
10. The communication method of the production equipment according to claim 9, wherein after the MC protocol network environment and the EIP protocol network environment are configured in the upper computer, the method further comprises:
and configuring the programmable logic controller, the MC protocol network environment, the EIP protocol network environment and the upper computer in the same local area network by using a network switch.
CN202010469669.0A 2020-05-28 2020-05-28 Communication system and method for production equipment Pending CN111565197A (en)

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