Hottest delta DeviceNet and Ethernet

2022-09-20
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Application of delta DeviceNet and Ethernet network in PLC manufacturing plant

Abstract: This paper mainly introduces the application of Delta industrial control products (PLC, frequency converter, temperature controller, etc.) in dvicene network and industrial Ethernet

keyword: Delta Fieldbus Industrial Ethernet DeviceNet PLC hmi

abstract: this paper, mainly introduces the applications of Delta industrial products (such as PLC, AC moto r drive, temperature controller, etc.) in DeviceNet networks and ethernet

Key words: DELTA Fieldbus Ethernet Devicenet PLC HMI

1. Introduction

devicenet is one of the more popular fieldbus nowadays. Fieldbus control system is not only an open communication network, but also a fully distributed control system. It connects the intelligent devices as network nodes into an automatic network system, and realizes the comprehensive automation functions of basic control, compensation calculation, parameter modification, alarm, display, monitoring and optimization. It is a comprehensive technology with intelligent sensor, control, computer, digital communication and network as the main content. The fieldbus system breaks the structure of one-to-one connection of equipment according to the requirements of control circuit adopted by the traditional control system. The control module and each input/output module in the control room in the original DCS system are put into the field equipment, and the field equipment has the communication ability, so the control system function can be completed directly on site without relying on the computer or control instrument in the control room, realizing the thorough decentralized control. The fieldbus system has the following characteristics in technology:

the system has openness and interoperability

the communication protocol complies with the same standards, and information exchange can be realized between devices. Users can form an open interconnected system with products from different suppliers according to their own needs. Information can be exchanged between systems and equipment, and equipment with similar performance from different manufacturers can be exchanged

l system function autonomy

the system disperses the functions of sensing measurement, compensation calculation, engineering quantity processing and control into the field equipment, which can complete the basic functions of automatic control and diagnose the operation status of the equipment at any time

l system is decentralized

fieldbus is a fully decentralized control system structure, which simplifies the system structure and improves the reliability

l the system has adaptability to the environment

the fieldbus supports twisted pair, coaxial cable, optical cable, radio frequency, infrared ray, power line, etc., has strong anti-interference ability, can adopt two-wire system to realize power supply and communication, and can meet the requirements of safety and explosion-proof. Due to the simplification of the fieldbus structure, the signal conditioning, conversion and isolation and other functional units of the DCS system and their complex wiring are no longer required, which saves the number of hardware and investment. Simple connection design saves installation cost. The equipment has the ability of self diagnosis and simple fault handling, which reduces the maintenance workload. The interchangeability, intelligence and digitalization of the equipment improve the accuracy and reliability of the system. It also has the advantages of simple design and easy reconstruction

The development of computer network, communication and control technology has led to the profound reform of automation system. Information technology is rapidly penetrating into the equipment layer of the production site, covering all aspects from the production workshop to enterprise management and operation, communicating all links from raw material supply, production and manufacturing to production scheduling, resource planning and even marketing, and gradually forming an enterprise information system based on the control network. Fieldbus is a new technology that conforms to this trend. The enterprise network system based on fieldbus is the trend of enterprise development. As shown in the figure: schematic diagram of enterprise network system based on fieldbus

2. Project background introduction

plc manufacturer is the production department of delta dvp-s and dvp-e series PLC. The project this time is to do three production lines, including ICT status, ASSY status, t2+pack status, in which each production line contains 8 or more information statuses, such as production line shortage alarm, o/i error, secondary stacking, poor test fixture, etc. Through the feedback information of on-site sensors (thermocouples), actuators (motors) and operators, engineers in the control room can clearly see the operation status of the production line and issue production orders to the production line. So what form is used to complete the information exchange between the site and the control room, office and operators? This is what we are most concerned about. Generally speaking, this project uses the communication mode of DeviceNet and industrial Ethernet to complete the information exchange of the whole system. This is also in line with the application of computer network in real production described above, and the benefits it brings will not be mentioned again

3. Solution

3.1 the network architecture of the whole project is shown in the following figure:

plc production monitoring workshop network architecture diagram

3.2 the list of main equipment used in the whole system is as follows:

product model number remarks

dvp-en01-sl 2 Industrial Ethernet communication modules

dvp-dnet-sl 1 DeviceNet master module

dvp-dt01 2 DeviceNet slave modules

dvp-28sv 1 set.Delta PLC

dvp-12sa 2 sets Delta PLC

Rtu-dnet 1 DeviceNet remote i/o communication module (each set can expand up to 8 i/o modules)

dvp-08sn 2 digital output expansion modules (8 points)

dvp-08st11n 2 digital input expansion modules (8 points)

dna02 4 DeviceNet slave modules

tap-cn01 3 DeviceNet Network Node expansion

tap-cb02 150m DeviceNet thin cable (outer diameter 6.9mm)

unknn own 100m ehernet Industrial Ethernet cable (equipped with RJ45 crystal head)

dop-ae10t 2 Delta AE series man-machine interfaces

dop-a10t 2 Delta a series man-machine interfaces

dop-exlnhj1ae 2 Delta AE series man-machine interface Ethernet communication expansion cards

vfd-b 2 Delta B series frequency converters

dtd-4896 2 Delta temperature controllers

pt100 2 platinum resistors (temperature sensor, wearing standard signal conversion transmitter)

3.3 realization of network configuration

how to configure so many devices to realize mutual communication makes our maintenance method of fatigue testing machine: the main problems we pay attention to are described in detail below. First of all, the DeviceNet Network communication protocol that delta follows, and the software required for its network configuration is devicenetbuilder_ V1.01 can be used to integrate almost all delta products to form a DeviceNet communication network. Its operability is simple, convenient and easy to understand. The following is a detailed explanation of the steps and details of DeviceNet Network configuration, as follows:

Step 1

after the hardware network is built, set the address of each hardware node, modify the communication format into the corresponding format according to the instructions of each product (this step is not described in detail, because there are detailed instructions on the corresponding product instructions of delta), and run devicenetbuilder_ V1.01, scan the whole network Tetra Pak launched the world's first sterile paper packaging with the highest level of certification - Tetra Pak peak sterile packaging in 1 liter with biological plastic and a 30mm lightweight cover will automatically search all nodes on the network, as shown in the figure

figure

Step 2

configure the address mapping of each slave station in the master station scanning module, as shown in the figure

figure

note: the output list indicated in the figure refers to the address of the data sent by the DeviceNet master station to the slave station, that is, the address occupied by the master station data register; The input list refers to the address of the data sent by DeviceNet from the slave station to the master station, that is, the address range occupied by the master station to store these data in the master station after receiving the data from the slave station. Examples are as follows:

Step 3

the next thing to do is to show these corresponding data in the program, as shown in the figure

figure

figure

as shown in the figure: M20 is the start button of the frequency converter, and M12 is the indication of the operation state of the frequency converter

figure

d6288 in the figure is the set value of the frequency converter (set in the touch screen)

figure

d6038 in the figure is the feedback value of the actual frequency of the frequency converter

after these three simple configuration and writing steps, the communication of DeviceNet Network between frequency converter and PLC can be realized

next, let's talk about the Ethernet communication between HMI in control room and office and PLC on site. The method is simple: the steps are as follows

Step 1

select tcp/ip as the type of HMI establishment, as shown in the figure,

figure

figure

Step 2

configure the IP address of HMI, as shown in Figure

figure

Step 3

set the IP address of PLC, as shown in Figure

figure

the IP setting of the second HMI is similar, so it is not exhaustive. After the setting of the above three steps, the two HMI and PLC can carry out Ethernet communication, so that the control room and office can fully monitor the operation status of all equipment in the whole production workshop

4. Conclusion

this paper discusses in detail how to use DeviceNet Network and Ethernet to realize the information exchange between the whole workshop, control room and office, so that engineers can monitor the production situation of the whole production line in the control room and office, which will become the mainstream trend of the development of experimental machines to a large extent, reflecting the flexibility, diversity and strong applicability of delta products in the network

references

(1) dvp-plc application technical manual (program)

(2) dvp-plc application technical manual (special module)

(3) dop-tp human machine interface application technical manual

(4) Delta DeviceNet application technical manual (end)

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