Modbus RTU is a famous layer 2 fieldbus protocol used in wide range of applications since the mid 80’s and it has its encapsulation in a Ethernet frame, on TCP/IP protocol of layer 4 – 3 of OSI model. It can be used on Ethernet networks though a logic IP address, Modbus TCP uses the same function codes of RTU. The main advantage is that it is faster and can be used to send or receive data through any Ethernet device such as switches and routers in different topologies like star, tree or other line topologies using TCP/UDP/IP protocols in Layer 3-4. It can be installed in Standard 10, 100 or 1000 Mbit/s Ethernet technology based on copper cables, fiber optics or wireless standards can be used. Number of stations is almost infinite and it can go up to a speed of 1.5 Kbyte per telegram frame.The full application note can be found here.
DVP12-SE PLC can be configured to exchange data between other PLCs via Ethernet(modbus TCP/IP) by using DCISoft Software. DCISoft Software is an integrated configuration tool of Delta network modules for WINDOWS operation system. Below is how to configure DVP12-SE for Data Exchange with other PLCs.Ethernet function of DVP12-SE PLCFollow the steps below to configure DVP12-SE for Data Exchange.1.
Communication Setting: Start DCISoft in your PC, and click Communication Setting on the Tools menu.When the DCISoft opens as shown above,Click the communication settings icon on the tool menu as shown below. Set the communication type and the communication parameter that you prefer to use on your PC for connecting the DCISoft with the DVP12-SE PLC.2. Auto SearchAfter setting the communication type and communication parameter, then push the “Auto Search” button to search for the DVP12-SE in the DCISoft for configuration.3. Setup Overview: after the step above, the interface below will appear. Double-click on the DVP12-SE module icon contained in the interface below to enter the setup overview page.4. OverviewAfter the step above, the interface below will appear which contains several tabs in the tool bar. The first tab is the overview tab, this tab shows the current basic status of the DVP12-SE PLC module.
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I will further talk about the Basic and the Data Exchange tabs used for the configuration of the DVP12-SE PLC.5. Basic settingsPush the basic tab, the interface below for setting the network parameter will appear.5.1 Module name: There can be many DVP12-SE on the network. Thus, you can set up a module name for each module to identify the module when you need to use them.5.2 Network setup: In the IP configuration field, you can Enable DHCP (DHCP: is Automatically updated by the server. There has to be a server in the LAN) or static IP. (Static IP: Is Preset or manually modified by the user). If you choose Static IP, manually modified the; IP address, Subnet mask(Netmask ) and the Gateway IP.6.
Data ExchangeClick the data exchange tab, the interface below will appear. The Data Exchange is used for configuring exchange of data between PLC via network. A Delta Ethernet master can read/write data from/into a slave.If a device which is not a Delta PLC is connected, users can use the hexadecimal four-digit MODBUS address of the device for data exchange.6.1. Enable data Exchange:Users can enable or disable a data exchange. After a data exchange is enabled, the data willbe exchanged6.2.Enable Condition:In the enable condition field,you can select Always Enable,Program Control or PLC Run. If Always Enable is selected,DVP12-SE will execute data exchange continuously until the setting in DCISoft is changed.If Program Control is selected, DVP12-SE will execute data exchange according to theprogram setting. If PLC Run is selected, DVP12-SE will execute data exchange when the DVP12-SE Run Mode switch is activated6.3. Slave ID, IP Address and Enable (Station Address-IP Address:)You have to type in the IP address of the slaves. For example, If the IP address of a slave is 192.168.0.1, and the station number of the slave is 1, you can type 1 in the first Slave ID cell, select the box in the first Enable cell, and type in the first IP Address cell. You have to enable and include the IP addresses of the other PLC that will be slaves6.4.
Master Device, Slave Device, and Quantity:below is a brief information about the function of Master Device, Slave Device, and Quantity in data exchange dialog box of DCISoft.In the Master Device, Slave Device cell, if the the slaves device is a Delta PLC, enter the starting D register that you will use for data exchange.If the slave is a third party device(not a delta PLC), enter the an hexadecimal four-digit MODBUS address that the device will use for data exchange. See below the meaning of the arrow signs in the master device and slave device column of data exchange page in DCISoft.Reading ( ←): Initial reception register in a master ← Initial transmission register in a slaveWriting ( →): Initial transmission register in a master → Initial reception register in a slave6.5. Hello everyone,Indicated for beginners, experts, professionals and amateurs.Our brand new Delta starter kit is ready for you.The idea is give you quick and easy system configuration to practice your programming skills.There’s 2 starter kits, the Standard and the Ethernet, feel free to choose whatever you prefer just clicking on below link.You just need to add your personal data on that webpage and our partners will contact you for the delivery.The Kit is composed by PLC, HMI, power supply and all the necessary cables for program them.
It also came with USB disk with several training examples and manual.You can find a description of both kits on thisIn case you need more exhaustive information use this other one.This is the perfect kit for everyone who wants to introduce in Delta programming software.In case you already have your Delta elements, and just want the training tools, feel free to download all the information for free from our.Enjoy, and do not hesitate to share your experience with us. Another useful Ethernet application with our new HMI´s is the connection.As you can see in the picture configuration, Multi-drop means have 2 mirror HMI´s where can be used and all the actions in one HMI, will be mirrored on the other one.To do this, we need as always one master and one slave, or with the proper words, one Host and one Client.Where our customers use Multidrop? The typical applicaion use to be a huge machine with several control points, printing machine, Parking, etcIf you are interested follow the tutorial.1. HMI Host configuration2. Confiurate IP addresss of Host and client on the same Range3. HMI Client configurationYou can download the full tutorial and some example on the following link.And as always don´t hesitate to let us know your commentaries.
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