Construction method, system and use method of nuclear chemical field bus system based on FCS

Abstract

The invention discloses a construction method, a system and a use method of a nuclear chemical field bus system based on an FCS. The construction method comprises the following steps: constructing a one-to-many three-layer architecture of the nuclear chemical engineering field bus system, wherein the three-layer architecture comprises an equipment layer, a process control layer and a centralized management layer; the controlled equipment is used for collecting nuclear chemical engineering field data; the controller is used for automatically controlling the nuclear chemical engineering site according to the nuclear chemical engineering site data; the server is used for receiving nuclear chemical engineering field data and automatic control data and sending a received control instruction to the equipment layer and the process control layer; respectively accessing the controlled equipment and the controller to the Internet or a local area network through a field bus; a server is connected with the controlled device and the controller through the Internet or a local area network; and the controller is bidirectionally connected with the controlled equipment through a field bus. According to the invention, the signal transmission precision and the anti-interference capability can be improved, and the cable quantity is saved.

Description

Technical Field

[0001] The present invention relates to the field of nuclear chemical technology, in particular to a method based on FCS (field

[0002] buscontrol system field control system) nuclear chemical field bus system construction method, system and use method. Background Art

[0003] Nuclear chemical reprocessing usually involves multiple steps and process units, and requires precise control of parameters such as temperature, pressure, flow, and chemical addition. At the same time, nuclear chemical reprocessing involves a large amount of data collection, monitoring, and control, which need to be integrated, processed, and analyzed. Nuclear chemical reprocessing may involve toxic, flammable, and corrosive substances, as well as impacts on the environment. Therefore, a monitoring method is needed to make nuclear chemical reprocessing safe, efficient, and flexible.

[0004] Large-scale post-processing plants have complex process flows, huge signal volumes, large plant buildings, and dispersed measurement and control points, which lead to a huge amount of cables and great difficulty in cable laying. At the same time, a large number of ventilation, water supply and drainage, steam, compressed air and process pipelines have been arranged in the limited space of the closed plant building, and a large number of bridges need to be installed, which brings difficulties to engineering design, pipeline integration and subsequent cable laying.

[0005] In the existing technology, DCS (distributed control system) is mainly used to realize centralized control of the whole plant, but the DCS control system is usually a "one-to-one" structure, that is, each controller (PLC or DCS controller) is responsible for controlling a separate device or system. This approach has disadvantages:

[0006] 1. Waste of resources: Each controller requires independent hardware and software resources, which will cause waste of resources when a large number of devices need to be controlled.

[0007] 2. System complexity: The "one-to-one" structure will result in a large number of independent controllers in the system, increasing the complexity and maintenance cost of the system.

[0008] 3. Difficulty in collaborative operation: Since each controller works independently, it is difficult to achieve collaborative operation and information sharing between devices.

[0009] 4. The level of digital operation management and operation economy are not high, including low accuracy and anti-interference ability, and large amount of cables used. Summary of the invention

[0010] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art and to propose a construction method, system and use method based on the FCS nuclear chemical field bus system. The system obtained by adopting the construction method can improve the level of digital operation management and operation economy, improve signal transmission accuracy and anti-interference ability, and save a large amount of cables.

[0011] In a first aspect, the present invention provides a method for constructing a FCS nuclear chemical field bus system, the method comprising the following steps:

[0012] Step S1: construct a three-layer architecture of the nuclear chemical field bus system; the three-layer architecture includes a device layer, a process control layer and a centralized management layer;

[0013] The device layer includes N controlled devices, the process control layer includes M controllers, and the centralized control layer includes a server; N and M are both natural numbers greater than 1, and N is greater than or equal to M;

[0014] The controlled equipment is used to collect nuclear chemical field data; the controller is used to automatically control the nuclear chemical field according to the nuclear chemical field data; the server is used to receive the nuclear chemical field data and automatic control data, and to send the received control instructions to the equipment layer and the process control layer;

[0015] Step S2: connecting the controlled device and the controller to the Internet or the local area network respectively through the field bus; and,

[0016] Connecting the server to the controlled device and the controller via the Internet or a local area network;

[0017] Wherein, the controller and the controlled device are bidirectionally connected via a field bus.

[0018] Furthermore, in step S2, the controlled device is connected to the Internet or a local area network via a field bus, which specifically includes the following steps:

[0019] Determine the bus interface supported by the controlled device:

[0020] If it is determined that the controlled device supports the FF H1 bus interface, the controlled device is connected to the Internet or local area network through the FF H1 bus; if it is determined that the controlled device does not support the FF H1 bus interface but supports the PROFIBUSDP bus interface, the controlled device is connected to the Internet or local area network through the PROFIBUSDP bus; if it is determined that the controlled device does not support the FF H1 bus interface and does not support the PROFIBUSDP bus interface, an FF signal adapter card is used to connect the controlled device to the Internet or local area network through the FF H1 bus.

[0021] In a second aspect, the present invention provides a nuclear chemical fieldbus system based on FCS, the system comprising a device layer, a process control layer and a centralized management layer;

[0022] Wherein, the device layer includes N controlled devices, the process control layer includes M controllers, and the centralized control layer includes a server; N and M are both natural numbers greater than 1, and N is greater than or equal to M;

[0023] The controlled device is used to collect nuclear chemical field data and send the nuclear chemical field data to the controller and the server;

[0024] The controller is connected to the controlled device and is used to automatically control the nuclear chemical site according to the nuclear chemical site data to obtain automatic control data; and upload the automatic control data to the server;

[0025] The server is connected to the controlled device and the controller respectively through a field bus, and is used to receive nuclear chemical field data and automatic control data, and to send the received control instructions to the device layer and process control layer.

[0026] Further, the controlled equipment includes field instruments, transmitters, field valve positioners, process pneumatic valves, motors, and centrifugal pumps;

[0027] Among them, the field instrument is connected to the server through the FF H1 bus, the field instrument is connected to the server through the FF H1 bus, the field valve positioner is connected to the server through the FF H1 bus, the process pneumatic valve is connected to the server through the PROFIBUSDP bus, the motor is connected to the server through the FF signal adapter card and through the FFH1 bus, and the centrifugal pump is connected to the server through the FF signal adapter card and through the FF H1 bus.

[0028] Furthermore, the centralized management layer also includes a human-computer interaction terminal;

[0029] The human-computer interaction terminal is connected to the server and is used for receiving and displaying nuclear chemical field data and automatic control data, and sending control instructions to the equipment layer and process control layer through the server.

[0030] In a third aspect, the present invention provides a method for using a FCS nuclear chemical field bus system, wherein the system adopts the FCS nuclear chemical field bus system according to the second aspect,

[0031] The method of use includes:

[0032] Collaborate with the equipment layer, process control layer and centralized management layer to achieve range modification, instrument diagnosis and loop calibration.

[0033] Furthermore, the equipment layer, process control layer and centralized management layer are coordinated to realize the range modification, which specifically includes the following steps:

[0034] Step A1: determining a target device from the controlled devices, wherein the target device is a device for which range modification is required;

[0035] Step A2: Obtain the first controller corresponding to the target device in the process control layer;

[0036] Step A3: in the centralized management layer, the range parameters of the target device of the first controller are obtained through the human-machine interface, and the range modification event record is recorded.

[0037] Furthermore, the equipment layer, process control layer and centralized management layer are coordinated to realize instrument diagnosis, which specifically includes the following steps:

[0038] Step B1: determining a target instrument from the controlled equipment, wherein the target instrument is an instrument that needs to be diagnosed in the fieldbus network;

[0039] Step B2: Obtain the second controller corresponding to the target instrument in the process control layer;

[0040] Step B3: in the centralized management layer, the diagnostic data of the target instrument by the second controller is obtained through the human-machine interface, and the instrument diagnostic event record is recorded.

[0041] Furthermore, the device layer, process control layer and centralized management layer are coordinated to realize loop verification, which specifically includes the following steps:

[0042] Step C1: Determine the target circuit to be verified from the controller;

[0043] Step C2: Obtain verification information corresponding to the target circuit;

[0044] Step C3: Obtain the verification information of the target loop through the human-machine interface in the centralized management layer, and record the loop verification event record.

[0045] Beneficial effects of the present invention:

[0046] 1. The present invention is based on FCS to realize the design of nuclear chemical field bus system. FCS adopts a "one-to-many structure", that is, one controller can control multiple devices or systems at the same time. Compared with the "one-to-one" structure, this structure has the following advantages:

[0047] 1.1 High resource utilization: One server / controller can manage multiple devices at the same time, reducing the waste of hardware and software resources.

[0048] 1.2 System simplification: The system in the present invention adopts a one-to-many structure, which simplifies the structure and reduces system complexity and maintenance costs.

[0049] 1.3 Collaborative operation: The present invention is based on FCS. The FCS structure can better realize collaborative operation and information sharing between devices, thereby improving the overall efficiency and flexibility of the system.

[0050] 2. Nuclear chemical post-processing usually involves multiple equipment, process units and systems. The present invention can manage and control multiple equipment at the same time and can achieve centralized control and monitoring of the entire site.

[0051] 3. The present invention adopts a distributed control structure, which can realize distributed control of different areas and different process units, and has higher flexibility. This is very beneficial for situations in which multiple process units need to be coordinated and optimized in nuclear chemical post-processing.

[0052] 4. The present invention has good fault isolation and fault tolerance capabilities. Even if some equipment or controllers fail, it will not affect the normal operation of the entire system. This is very important for nuclear chemical post-processing where high system reliability and stability are required.

[0053] 5. The present invention can be customized and developed according to specific nuclear chemical post-processing process requirements to meet specific control needs and safety requirements.

[0054] 6. The present invention solves the problems of difficult inspection and maintenance, unpredictable faults, signal interference, etc. caused by the dispersion of instrumentation and control equipment. The signal transmission accuracy and anti-interference ability are improved by 50%, and the amount of cables is saved by 70%. It further improves the digital operation management level and operation economy of the post-processing plant, and has good practical value and economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of a construction method based on an FCS nuclear chemical field bus system in an embodiment of the present invention;

[0056] Figure 2 A flow chart of the design of the FCS nuclear chemical field bus system in an embodiment of the present invention;

[0057] Figure 3 This is a system architecture diagram based on the FCS nuclear chemical field bus in an embodiment of the present invention. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the technical solution of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0059] It should be understood that the specific embodiments and drawings described herein are only used to explain the present invention rather than to limit the present invention.

[0060] It can be understood that, in the absence of conflict, the various embodiments of the present invention and the various features in the embodiments can be combined with each other.

[0061] It can be understood that, for the convenience of description, the drawings of the present invention only show the parts related to the present invention, while the parts irrelevant to the present invention are not shown in the drawings.

[0062] It can be understood that each unit and module involved in the embodiments of the present invention may correspond to only one physical structure, or may be composed of multiple physical structures, or multiple units and modules may be integrated into one physical structure.

[0063] It can be understood that, without conflict, the functions and steps marked in the flowcharts and block diagrams of the present invention may occur in an order different from that marked in the drawings.

[0064] It is understood that the flowcharts and block diagrams of the present invention illustrate the possible architectures, functions, and operations of the systems, devices, equipment, and methods according to the various embodiments of the present invention. Each box in the flowchart or block diagram may represent a unit, module, program segment, or code, which contains executable instructions for implementing the specified functions. Moreover, each box or combination of boxes in the block diagram and flowchart may be implemented by a hardware-based system that implements the specified functions, or may be implemented by a combination of hardware and computer instructions.

[0065] It can be understood that the units and modules involved in the embodiments of the present invention can be implemented by software or hardware. For example, the units and modules can be located in a processor.

[0066] Embodiment 1:

[0067] like Figure 1 As shown, this embodiment provides a construction method based on FCS nuclear chemical field bus system, and the construction method includes the following steps:

[0068] Step S1: construct a three-layer architecture of the nuclear chemical field bus system; the three-layer architecture includes a device layer, a process control layer and a centralized management layer;

[0069] The device layer includes N controlled devices, the process control layer includes M controllers, and the centralized control layer includes a server; N and M are both natural numbers greater than 1, and N is greater than or equal to M;

[0070] The controlled equipment is used to collect nuclear chemical site data; the controller is used to automatically control the nuclear chemical site according to the nuclear chemical site data; the server is used to receive nuclear chemical site data and automatic control data, and to send the received control instructions to the equipment layer and process control layer.

[0071] In specific implementation, this embodiment targets the special process characteristics of the post-processing plant, takes into account the needs of remote operation and monitoring, and the large number of process-specific equipment, and the FCS control system adopts a long-distance distributed architecture, which is mainly a three-layer structure:

[0072] Layer 0 is the equipment layer (also known as the process system access layer), which is located at the site of each sub-item. All instruments, valves, motors, pumps and other measurement and control equipment are introduced into the control system from this layer. For layer 0, the instrumentation and control equipment of the conventional DCS architecture are all analog and switch transmission at this layer, while the instrumentation and control equipment of the FCS architecture are fully digital transmission at this layer.

[0073] Layer 1 is the process control layer, where the automatic control logic is calculated and sent directly to the on-site actuator, and sent to layer 2 for display and alarm. The control station of layer 1 of the FCS system uses a large number of digital bus modules such as FF and DP to access the digital equipment of layer 0, replacing the AI, AO, DI, and DO interface cards of the DCS system.

[0074] The second layer is the centralized management layer (also known as the process monitoring and operation layer), where related equipment and operation stations are located in the centralized control area. Human-computer interaction and data storage are completed. At the same time, the equipment management system shares the network with the FCS, and receives a series of "non-process measurement and control" information such as related diagnosis and maintenance of the instrumentation and control intelligent equipment through its server.

[0075] Step S2: connecting the controlled device and the controller to the Internet or the local area network respectively through the field bus; and,

[0076] Connecting the server to the controlled device and the controller via the Internet or a local area network;

[0077] Wherein, the controller and the controlled device are bidirectionally connected via a field bus.

[0078] As a specific implementation, in step S2, connecting the controlled device to the Internet or a local area network via a field bus specifically includes the following steps:

[0079] Determine the bus interface supported by the controlled device:

[0080] If it is determined that the controlled device supports the FF H1 bus interface, the controlled device is connected to the Internet or local area network through the FF H1 bus; if it is determined that the controlled device does not support the FF H1 bus interface but supports the PROFIBUSDP bus interface, the controlled device is connected to the Internet or local area network through the PROFIBUSDP bus; if it is determined that the controlled device does not support the FF H1 bus interface and does not support the PROFIBUSDP bus interface, an FF signal adapter card is used to connect the controlled device to the Internet or local area network through the FF H1 bus.

[0081] like Figure 2 As shown in the figure, when building the system, we must first combine the characteristics of the post-processing process, design the design principles and overall architecture of the field bus control at the top level, and then, based on the characteristics of the post-processing plant, make overall design plans for the field instruments, valves, and electrical equipment, and develop field intelligent instrumentation and control equipment. Finally, combine the equipment management system with the bus control system to realize information functions such as range modification, instrument diagnosis, loop calibration, and event recording.

[0082] During the specific implementation, the field instruments, valves, and control devices in the 0-layer equipment shall determine the specific bus standard type to be adopted according to their own characteristics:

[0083] FF bus has more advantages in many aspects, so it is the preferred bus type for the development of nuclear chemical automation engineering. Field instruments, transmitters and valve positioners (pneumatic control valves) use FF H1 communication protocol as much as possible, and 4-20mA+HART protocol as a backup.

[0084] FF bus (Foundation Fieldbus) is a digital communication bus protocol used in the field of industrial automation. In this embodiment:

[0085] 1. Use digital communication: FF bus uses digital communication technology, which can achieve high-speed and reliable data transmission, reducing the interference and errors in traditional analog signal transmission.

[0086] 2. Use multi-point communication: FF bus supports multi-point communication and can connect multiple devices to the same bus, simplifying the wiring structure and reducing the use of cables.

[0087] 3. Equipment management function: FF bus supports equipment management function, which can realize remote diagnosis, configuration and management of field equipment, improving the maintainability and manageability of equipment.

[0088] 4. Data real-time: FF bus can realize real-time monitoring and control of field equipment, improving the real-time and accuracy of industrial automation systems.

[0089] 5. Standardized protocol: The FF bus adopts the international standard protocol to ensure the interoperability and compatibility between equipment from different manufacturers.

[0090] When using the FF bus, the field instruments, transmitters and valve positioners can adopt the FF H1 communication protocol as much as possible to achieve digital communication and advanced equipment management functions. At the same time, you can also consider using the 4-20mA+HART protocol as a backup to be compatible with the traditional analog signal transmission method to ensure the stability and compatibility of the system.

[0091] FF transmitters must have AI function blocks, self-diagnosis function blocks, LAS function blocks, and pass ITK (Interoperability Tool Kit) testing, and should be consistent with the control system software version, which helps improve the performance and reliability of the equipment and ensures the compatibility of the equipment with the control system.

[0092] To ensure the effective implementation of field control, the field valve positioner (pneumatic control valve) adopts FF H1 communication protocol intelligent device. The field valve positioner (pneumatic control valve) adopts FF H1 to provide efficient and reliable communication and control solutions for the field control system, which helps to improve the performance and maintainability of the field control system.

[0093] In order to improve the performance and reliability of the FF valve positioner, the FF valve positioner must have PID / AO / DI function blocks, self-diagnosis function blocks, LAS function blocks, and pass the ITK test and be consistent with the control system software version.

[0094] Regardless of the topology selected, there must be an independent short-circuit protector (overvoltage, overcurrent) from the FF junction box to the field instrument to ensure that the failure of a single device does not affect the entire bus, thereby preventing potential failures from causing damage or impact on the system.

[0095] The bus terminator must be effectively configured to prevent signal reflection at both ends of the bus and prevent signal distortion during transmission. The terminator should be used in pairs at the beginning and end of the bus.

[0096] The fieldbus not only realizes the communication of multiple intelligent devices, but also provides power for all intelligent devices. The power supply and FF H1 communication card are the weak links of the FF bus. Since each bus is connected to multiple instrumentation and control equipment, and some buses also perform closed-loop operations, this design method makes the power supply and communication card redundant. In actual use, a redundant FF power supply with a maximum output current of 360mA and an output voltage of 25-28VDC is used.

[0097] FF H1 supports four structures: single-point, bus, daisy chain and tree. In practical applications, the tree structure is used as the main structure, and the bus structure combined with the tree structure is used as the auxiliary structure.

[0098] Process pneumatic valves (non-safety grade) are controlled by bus valve islands and adopt PROFIBUSDP protocol. Select bus topology. Terminators should be used in pairs at the beginning and end of the bus. PROFIBUSDP fieldbus system should follow the provisions of IEC61158 standard specification. Bus allocation should be based on the same process system as the primary principle, and combined with the principle of close actual position of pneumatic valves. When PROFIBUSDP bus equipment has an interlocking relationship with heterogeneous bus instruments, they should be allocated under the same control station.

[0099] For the connection with electrical equipment such as motors and pumps, since most electrical cabinets still use traditional DI / DO signal output, FF signal transfer modules are used for digital transmission of such electrical equipment to further improve the digitalization level of the entire factory. The FF signal transfer module can convert the traditional hard-wired signal or traditional analog 4-20mA signal from the on-site electrical control box into FF signal and transmit it to the bus control system.

[0100] The above bus system design method for each different device is then used to carry out detailed design and control station allocation and other specific work based on this principle, and finally completes the bus control design of the overall post-processing plant project.

[0101] As a specific wiring type, the network topology between the PROFIBUSDP interface and the process pneumatic valve is a bus type; and the topology between the FF H1 interface and the field instrument is a tree type; and the topology between the FF H1 interface and the transmitter is a tree type; and the topology between the FF H1 interface and the field valve positioner is a tree type; and the topology between the FFH1 interface and the motor is a tree type; and the topology between the FF H1 interface and the centrifugal pump is a tree type. The FF H1 interface is used to send and receive FF H1 messages, and the PROFIBUSDP interface is used to send and receive PROFIBUSDP messages.

[0102] The FCS nuclear chemical field bus system obtained by adopting the construction method based on the FCS nuclear chemical field bus system in this embodiment can solve the problems of difficult inspection and maintenance, difficult fault prediction, signal interference, etc. caused by the dispersion of instrumentation and control equipment. The signal transmission accuracy and anti-interference ability are improved by 50%, and the cable volume is saved by 70%, which further improves the digital operation management level and operation economy of the post-processing plant, and has good practical value and economic value.

[0103] Embodiment 2:

[0104] like Figure 3 As shown, this embodiment provides a FCS-based nuclear chemical fieldbus system, which includes a device layer, a process control layer and a centralized management layer;

[0105] Wherein, the device layer includes N controlled devices, the process control layer includes M controllers, and the centralized control layer includes a server; N and M are both natural numbers greater than 1, and N is greater than or equal to M;

[0106] The controlled device is used to collect nuclear chemical field data and send the nuclear chemical field data to the controller and the server;

[0107] The controller is connected to the controlled device and is used to automatically control the nuclear chemical site according to the nuclear chemical site data to obtain automatic control data; and upload the automatic control data to the server;

[0108] The server is connected to the controlled device and the controller respectively through a field bus, and is used to receive nuclear chemical field data and automatic control data, and to send the received control instructions to the device layer and process control layer.

[0109] As a specific implementation, the controlled equipment includes a field instrument, a transmitter, a field valve positioner, a process pneumatic valve, a motor, and a centrifugal pump;

[0110] Among them, the field instrument is connected to the server through the FF H1 bus, the field instrument is connected to the server through the FF H1 bus, the field valve positioner is connected to the server through the FF H1 bus, the process pneumatic valve is connected to the server through the PROFIBUSDP bus, the motor is connected to the server through the FF signal adapter card and through the FFH1 bus, and the centrifugal pump is connected to the server through the FF signal adapter card and through the FF H1 bus.

[0111] As a specific implementation method, the centralized management layer also includes a human-computer interaction terminal;

[0112] The human-computer interaction terminal is connected to the server to receive and display nuclear chemical field data and automatic control data, and to send control instructions to the equipment layer and process control layer through the server. Operators can monitor and operate the nuclear chemical system in real time through the human-computer interaction terminal, which improves the flexibility and convenience of the system and helps to improve production efficiency and safety.

[0113] Embodiment 3:

[0114] This embodiment provides a method for using the FCS nuclear chemical field bus system. The system adopts the FCS nuclear chemical field bus system according to Embodiment 2.

[0115] The method of use includes:

[0116] Collaborate with the equipment layer, process control layer and centralized management layer to achieve range modification, instrument diagnosis and loop calibration.

[0117] As a specific implementation method, the device layer, process control layer and centralized management layer are coordinated to realize the range modification, which specifically includes the following steps:

[0118] Step A1: determining a target device from the controlled devices, wherein the target device is a device for which range modification is required;

[0119] Step A2: Obtain the first controller corresponding to the target device in the process control layer;

[0120] Step A3: in the centralized management layer, the range parameters of the target device of the first controller are obtained through the human-machine interface, and the range modification event record is recorded.

[0121] As a specific implementation method, the equipment layer, process control layer and centralized management layer are coordinated to realize instrument diagnosis, which specifically includes the following steps:

[0122] Step B1: determining a target instrument from the controlled equipment, wherein the target instrument is an instrument that needs to be diagnosed in the fieldbus network;

[0123] Step B2: Obtain the second controller corresponding to the target instrument in the process control layer;

[0124] Step B3: in the centralized management layer, the diagnostic data of the target instrument by the second controller is obtained through the human-machine interface, and the instrument diagnostic event record is recorded.

[0125] As a specific implementation method, the device layer, process control layer and centralized management layer are coordinated to realize loop verification, which specifically includes the following steps:

[0126] Step C1: Determine the target circuit to be verified from the controller;

[0127] Step C2: Obtain verification information corresponding to the target circuit;

[0128] Step C3: Obtain the verification information of the target loop through the human-machine interface in the centralized management layer, and record the loop verification event record.

[0129] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for constructing a FCS nuclear chemical field bus system, characterized in that: The construction method comprises the following steps: Step S1: construct a three-layer architecture of the nuclear chemical field bus system; the three-layer architecture includes a device layer, a process control layer and a centralized management layer; The device layer includes N controlled devices, the process control layer includes M controllers, and the centralized control layer includes a server; N and M are both natural numbers greater than 1, and N is greater than or equal to M; The controlled equipment is used to collect nuclear chemical field data; the controller is used to automatically control the nuclear chemical field according to the nuclear chemical field data; the server is used to receive the nuclear chemical field data and automatic control data, and to send the received control instructions to the equipment layer and the process control layer; Step S2: connecting the controlled device and the controller to the Internet or the local area network respectively through the field bus; and, Connecting the server to the controlled device and the controller via the Internet or a local area network; Wherein, the controller and the controlled device are bidirectionally connected via a field bus.

2. The method for constructing a FCS nuclear chemical field bus system according to claim 1, characterized in that: In step S2, the controlled device is connected to the Internet or a local area network via a field bus, which specifically includes the following steps: Determine the bus interface supported by the controlled device: If it is determined that the controlled device supports the FF H1 bus interface, the controlled device is connected to the Internet or local area network through the FF H1 bus; if it is determined that the controlled device does not support the FF H1 bus interface but supports the PROFIBUSDP bus interface, the controlled device is connected to the Internet or local area network through the PROFIBUSDP bus; if it is determined that the controlled device does not support the FF H1 bus interface and does not support the PROFIBUSDP bus interface, an FF signal adapter card is used to connect the controlled device to the Internet or local area network through the FF H1 bus.

3. A nuclear chemical field bus system based on FCS, characterized in that: Including equipment layer, process control layer and centralized management layer; Wherein, the device layer includes N controlled devices, the process control layer includes M controllers, and the centralized control layer includes a server; N and M are both natural numbers greater than 1, and N is greater than or equal to M; The controlled device is used to collect nuclear chemical field data and send the nuclear chemical field data to the controller and the server; The controller is connected to the controlled device and is used to automatically control the nuclear chemical site according to the nuclear chemical site data to obtain automatic control data; and upload the automatic control data to the server; The server is connected to the controlled device and the controller respectively through a field bus, and is used to receive nuclear chemical field data and automatic control data, and to send the received control instructions to the device layer and process control layer.

4. The FCS nuclear chemical field bus system according to claim 3 is characterized in that: The controlled equipment includes field instruments, transmitters, field valve positioners, process pneumatic valves, motors, and centrifugal pumps; Among them, the field instrument is connected to the server through the FF H1 bus, the field instrument is connected to the server through the FF H1 bus, the field valve positioner is connected to the server through the FF H1 bus, the process pneumatic valve is connected to the server through the PROFIBUSDP bus, the motor is connected to the server through the FF signal adapter card and through the FF H1 bus, and the centrifugal pump is connected to the server through the FF signal adapter card and through the FF H1 bus.

5. The FCS nuclear chemical field bus system according to claim 3 or 4, characterized in that: The centralized management layer also includes a human-computer interaction terminal; The human-computer interaction terminal is connected to the server and is used for receiving and displaying nuclear chemical field data and automatic control data, and sending control instructions to the equipment layer and process control layer through the server.

6. A method for using the FCS nuclear chemical field bus system, characterized in that: The system adopts the FCS nuclear chemical field bus system according to any one of claims 3 to 5, The method of use includes: Collaborate with the equipment layer, process control layer and centralized management layer to achieve range modification, instrument diagnosis and loop calibration.

7. The method for using the FCS nuclear chemical field bus system according to claim 6 is characterized in that: Collaborate with the equipment layer, process control layer and centralized management layer to achieve range modification, which includes the following steps: Step A1: determining a target device from the controlled devices, wherein the target device is a device that needs to be range-modified; Step A2: Obtain the first controller corresponding to the target device in the process control layer; Step A3: in the centralized management layer, the range parameters of the target device of the first controller are obtained through the human-machine interface, and the range modification event record is recorded.

8. The method for using the FCS nuclear chemical field bus system according to claim 6 is characterized in that: Collaborate with the equipment layer, process control layer and centralized management layer to achieve instrument diagnosis, which includes the following steps: Step B1: determining a target instrument from the controlled equipment, wherein the target instrument is an instrument that needs to be diagnosed in the fieldbus network; Step B2: Obtain the second controller corresponding to the target instrument in the process control layer; Step B3: in the centralized management layer, the diagnostic data of the target instrument by the second controller is obtained through the human-machine interface, and the instrument diagnostic event record is recorded.

9. The method for using the FCS nuclear chemical field bus system according to claim 6, characterized in that: Collaborate with the equipment layer, process control layer and centralized management layer to implement loop verification, which includes the following steps: Step C1: Determine the target circuit to be verified from the controller; Step C2: Obtain verification information corresponding to the target circuit; Step C3: Obtain the verification information of the target loop through the human-machine interface in the centralized management layer, and record the loop verification event record.

Images