CN210804058U

CN210804058U - Network structure of carbon dioxide overlapping unit control system

Info

Publication number: CN210804058U
Application number: CN201922125713.1U
Authority: CN
Inventors: 韩兴旺
Original assignee: Heilongjiang Arco Technology Ltd
Current assignee: Heilongjiang Arco Technology Ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-06-19
Anticipated expiration: 2029-12-02

Abstract

The utility model relates to a carbon dioxide overlapping unit control system's network structure. The carbon dioxide overlapping unit is increasingly widely applied to large-scale refrigeration houses, automatic control of the unit is required to be realized, the running condition of the unit is monitored through a network, and meanwhile, the modular refrigeration unit is required to be combined according to different use requirements so as to meet different use occasions. A network structure of a carbon dioxide overlapping unit control system comprises the following components: no. 1 unit (1) and No. 2 unit (2), No. 1 unit has No. 1 host controller (3), has No. 2 host controller (4) in No. 2 unit, and No. 1 host controller and No. 2 host controller pass through ethernet interconnect to be connected to host computer and programming computer by switch (5), and No. 1 host controller and No. 2 host controller pass through a plurality of slave controller (6) of RS485 network connection. The utility model discloses be applied to carbon dioxide overlapping unit control system's network structure.

Description

Network structure of carbon dioxide overlapping unit control system

The technical field is as follows:

the utility model relates to a carbon dioxide overlapping unit control system's network structure.

Background art:

the carbon dioxide overlapping unit is increasingly widely applied to large-scale refrigeration houses, automatic control of the unit is required to be realized, the running condition of the unit is monitored through a network, and meanwhile, the modular refrigeration unit is required to be combined according to different use requirements so as to meet different use occasions. Each set of independent modular units has its own control system, and the automatic control of these modular units requires mutual linkage.

The invention content is as follows:

the utility model aims at providing a carbon dioxide overlapping unit control system's network structure.

The above purpose is realized by the following technical scheme:

a network structure of a carbon dioxide overlapping unit control system comprises the following components: the system comprises a No. 1 machine set and a No. 2 machine set, wherein the No. 1 machine set is provided with a No. 1 host controller, the No. 2 machine set is internally provided with a No. 2 host controller, the No. 1 host controller and the No. 2 host controller are mutually connected through Ethernet and are connected to an upper computer and a programming computer through a switch, the No. 1 host controller and the No. 2 host controller are connected with a plurality of slave controllers through RS485 networks and are used for collecting data of field equipment and controlling the operation of the field equipment, the upper computer is connected to a network server through an internet network, the network server is respectively connected with a router, a tablet computer and a mobile phone through the internet network, and the router is connected with a monitoring computer.

In the network structure of the control system of the carbon dioxide overlapping unit, the No. 1 host controller and the No. 2 main controller are CJ2M _ CPU33 programmable controllers, the No. 1 main controller and the No. 2 main controller are connected through an industrial switch, a 100Base-TX twisted pair cable is adopted, and interfaces at two ends of the 100Base-TX twisted pair cable are RJ45 connectors.

The network structure of the carbon dioxide overlapping unit control system is characterized in that the slave controller is A7-200+, the slave controller is connected with the No. 1 main controller and the No. 2 main controller through 0.5mm shielding twisted-pair cables, interfaces at two ends are DB9 connectors, and a communication connection mode among the slave controllers is a bus connection mode.

Carbon dioxide overlapping unit control system's network structure, No. 1 host controller No. 2 main control unit and the host computer between adopt OMRON FANS-TCP communication protocol, No. 1 host controller with No. 2 main control unit slave controller between adopt Modbus-RTU communication protocol, No. 1 host controller with No. 2 host controller between adopt OMRON DATALINK protocol.

The utility model has the advantages that:

1. the utility model discloses a have a host controller in every independent unit, every host controller passes through ethernet interconnect to connect to host computer and programming computer by the switch. Each host controller is connected with a plurality of slave controllers through an RS485 network and is used for collecting data of field equipment, controlling the operation of the field equipment and the like. An OMRON FANS-TCP communication protocol is adopted between the host controller and the upper computer, and a Modbus-RTU communication protocol is adopted between the host controller and the slave controller. The OMRON DATALINK protocol is adopted among the host controllers. The upper computer is connected to a network server through an internet network, and the display equipment of the terminal comprises a personal computer, a pad and the running condition of control software control and monitoring equipment of a mobile phone.

The utility model discloses a constitution in the network:

hardware: the system comprises an upper computer PC, a host CJ2M _ CPU33, a slave A7-200+ and an industrial Ethernet switch.

Software: force control, CX-ONE.

The connection mode is as follows: the host controller CJ2M _ CPU33 and the upper computer PC are connected through an industrial switch using 100Base-TX twisted pair cable. The CJ2M _ CPU33 is connected by 100Base-TX twisted pair cable, and the interfaces at both ends are RJ45 connectors. The master controller CJ2M _ CPU33 and the slave controllers A7-200+ are connected by using 0.5mm shielded twisted pair cables, and the interfaces at two ends are DB9 connectors. The communication connection mode between all the slave controllers adopts a bus connection mode (hand-in-hand connection).

The utility model discloses a theory of operation of network: the Ethernet communication distance between the hosts and the upper computer is less than 100m, and the addresses of all the nodes are distinguished by setting network IP addresses. A maximum of 180 kbytes of data exchange can be set between the individual hosts. These data are shared among the various host controllers. These data in the other hosts are used directly in any one host control program. The communication between the upper computer and the host computer is in a master-slave mode, the upper computer monitoring software requests data of a host computer controller, and the host computer returns the data to the upper computer.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the system comprises a unit No. 1, a unit No. 2 and a unit No. 2, a host controller No. 3 and a host controller No. 1, a host controller No. 4 and a host controller No. 2, a switch 5, an exchanger 6, an upper computer 7, a programmable computer 8, a slave controller 9, a network server 10, a router 11, a tablet computer 12, a mobile phone 13 and a monitoring computer.

The specific implementation mode is as follows:

example 1:

a network structure of a carbon dioxide overlapping unit control system comprises the following components: the system comprises a number 1 machine set 1 and a number 2 machine set 2, wherein the number 1 machine set is provided with a number 1 host controller 3, the number 2 machine set is provided with a number 2 host controller 4, the number 1 host controller and the number 2 host controller are mutually connected through an Ethernet and are connected to an upper computer 6 and a programming computer 7 through a switch 5, the number 1 host controller and the number 2 host controller are connected with a plurality of slave controllers 8 through an RS485 network and are used for collecting data of field equipment and controlling the operation of the field equipment, the upper computer is connected to a network server 9 through an internet network, the network server is respectively connected with a router, a 10, a tablet computer 11 and a mobile phone 12 through the internet network, and the router is connected with a monitoring computer 12.

Example 2:

according to the network structure of the carbon dioxide overlapping unit control system in embodiment 1, the host controller No. 1 and the host controller No. 2 are CJ2M _ CPU33 programmable controllers, and the host controller No. 1 and the host controller No. 2 are connected through an industrial switch, a 100Base-TX twisted pair cable is adopted, and interfaces at two ends are RJ45 connectors.

Example 3:

according to the network structure of the carbon dioxide overlapping unit control system in

embodiment

1 or 2, the slave controllers are of a type a7-200+, the slave controllers are connected with the master controller No. 1 and the master controller No. 2 through 0.5mm shielded twisted pair cables, interfaces at two ends are DB9 connectors, and a group of slave controllers are connected through buses.

Example 4:

according to

embodiment

1 or 2 or 3, the network structure of the carbon dioxide overlapping unit control system, the OMRON FANS-TCP communication protocol is adopted among the host controller 1, the host controller 2 and the upper computer, the Modbus-RTU communication protocol is adopted among the host controller 1, the host controller 2 and the slave controller, and the OMRON DATALINK protocol is adopted among the host controller 1 and the host controller 2.

Example 5:

the total length of the communication distances of all nodes in the RS485 network is less than 1000m, and the node addresses of all the slaves are distinguished by setting station numbers. The addresses of the slaves are less than 127. Master-slave communication mode. The master requests data from the slaves, and the slaves respond and return the data.

The upper computer issues data to a data center on the internet, and the terminal display device reads the data of the data center through connecting the internet.

The characteristics of the network structure: the network is a multi-stage network structure and comprises an upper computer, a host computer, a slave computer and a terminal PC. The communication between the host computer and the upper computer and between the host computer and the host computer share the same network, thereby reducing the cost of network equipment and wiring.

The application range of the network structure is as follows: the network structure is suitable for occasions where multiple units in a large-scale refrigeration system run in parallel and need remote monitoring at the same time.

Claims

1. A network structure of a carbon dioxide overlapping unit control system comprises the following components: no. 1 unit and No. 2 unit, characterized by: the number 1 unit is provided with a number 1 host controller, the number 2 unit is provided with a number 2 host controller, the number 1 host controller and the number 2 host controller are mutually connected through Ethernet and are connected to an upper computer and a programming computer through a switch, the number 1 host controller and the number 2 host controller are connected with a plurality of slave controllers through an RS485 network and are used for collecting data of field equipment and controlling the operation of the field equipment, the upper computer is connected to a network server through an internet network, the network server is respectively connected with a router, a tablet computer and a mobile phone through the internet network, and the router is connected with a monitoring computer.

2. The network structure of the control system of the carbon dioxide overlapping unit as claimed in claim 1, wherein the host controller No. 1 and the host controller No. 2 are CJ2M _ CPU33 programmable controllers, and the host controller No. 1 and the host controller No. 2 are connected through an industrial switch, and adopt 100Base-TX twisted pair cables, and the interfaces at both ends are RJ45 connectors.

3. The network structure of the control system of the carbon dioxide overlapping unit as claimed in claim 2, wherein the slave controller is A7-200+, the slave controller is connected with the No. 1 master controller and the No. 2 master controller by using 0.5mm shielded twisted pair cable, the interfaces at both ends are DB9 connectors, and the communication connection mode among a group of slave controllers adopts a bus connection mode.

4. The network structure of the carbon dioxide overlapping unit control system according to claim 3, wherein an OMRON FANS-TCP communication protocol is adopted among the host controller No. 1, the host controller No. 2 and the upper computer, a Modbus-RTU communication protocol is adopted among the host controller No. 1, the host controller No. 2 and the slave controller, and an OMRON DATALINK protocol is adopted among the host controller No. 1 and the host controller No. 2.