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Lenze DS47 SMVector: PROFIBUS-DP Communications to Siemens S7-300 PLC Page 1 Overview PROFIBUS-DP is an internationally accepted serial protocol designed for commercial and industrial automation control systems and distributed I/O devices. Scope This document is intended to provide a helpful getting started guide for configuring a PROFIBUS-DP master to correctly communicate with a SMVector drive and is aimed to accompany the “SMVector PROFIBUS-DP Interface Reference Guide”. It is assumed that the user has familiarised themselves with how to navigate through the drive parameters using the drive keypad display. Methods for configuring master devices can differ greatly between manufacturers. The details supplied in this document are intended for the configuring a Siemens / VIPA S7 -300 type PLC. Previous experience of using Siemens Step 7 PLC configuration software would be a distinct advantage. The PLC handles the data transfer automatically, therefore no PLC coding or ladder logic is required to initiate data transfer between the PLC CPU & the PROFIBUS-DP interface. However an example ladder program is provided for reference. Requirements Hardware: • SMV with firmware V2.6.0 or later. • SMV PROFIBUS-DP interface with firmware V1.01 or later. • A PC to PLC interface, either via PROFIBUS-DP or using the PLC MPI port. • PLC PROFIBUS-DP interface, if not fitted as standard depending upon the CPU type (a VIPA Speed7 318 PLC with an integrated PROFIBUS-DP port was used for this document). Software & Firmware: • Siemens Simatic Step 7 Manager (V5.4 used for this document) • GSD & icon files for SMVector. NOTE: It is also assumed that the user has correctly configured and tuned the SMVector with the motor it is connected to. Drive Configuration All SMVector parameters and settings are accessed using the drive keypad Set the following drive parameters:- 1. Set the relevant motor and application parameters as required such as Accel times and current limit etc. 2. P100 - Start Control Source: Set to mode 3 Other modes exist (see the drive Operating Instructions for full details), however, only mode 3 allows full drive control from a PROFIBUS network. 3. P121, P122 or P123 - TB13A, B & C Digital inputs: Set one of the inputs to mode 9 It is possible to communicate to the drive via the network, but the drive control word will on function when the chosen input is active. 4. P400 - Network Protocol: Set to 6 for PROFIBUS 5. P410 - Node Address: Set this to the require address. The default is 126, but the valid address range is 1 to 125. 6. The SMVector PROFIBUS-DP module has support for up to 6 cyclic data channels in both directions. However the The default mapping for SMVector PROFIBUS-DP is 2 Data IN words and 2 Data OUT words, the configuration of which is shown in following table:- 7. P418 - Re-initialise Set P418 to 1 to activate any changes made to the module settings. 8. The SMVector is now ready for use on the PROFIBUS-DP network. Page 2 Lenze DS47 Link # Mapped Function IN 1 Drive Status Word IN 2 Actual Output Frequency OUT 1 Drive Control Word OUT 2 Frequency Setpoint NOTE: • The terms “IN data” and “OUT data” refer to the data as seen by the PLC. Therefore, ”OUT data” goes OUT of the PLC to the network, while “IN data” comes IN from the network to the PLC. • OUT data words should only be mapped to drive Read/Write parameters. Creating the Simatic project 1. Ensure that the Siemens Simatic Step 7 Manager software is correctly installed before proceeding. Follow the instructions that are supplied with this software for more information. 2. Using the Siemens Step 7 Manager configuration software, you can use a wizard or manually setup the project by selecting File from the toolbar followed by either New… or “New Project” Wizard… from the drop down menu, to create a new project. 3. If using the wizard then please follow the instructions given. Alternatively if you choose to manually set up the project, a window titled New Project will open. Under the User projects tab enter a project name, and then click on OK. 4. The project window will now open. Select Insert from the SITMATIC Manger toolbar followed by Station from the drop down menu, and select the appropriate PLC type, e.g. 2 SIMATIC 300 Station. Page 3 Lenze DS47 Enter the project name here 5. The SIMATIC Manager will now display the project with 2 icons in the right win- dow. Either expand the project tree on the left hand side or double click on the PLC name icon until the Hardware icon is visible. 6. Double click on the Hardware icon to launch the Hardware Configuration Utility Hardware Configuration 1. If the Hardware list / catalogue is not visible in the right side of the screen, then select View from the SITMATIC Manger toolbar followed by Catalogue from the drop down menu to open the Catalogue window section 2. Before proceeding check if the SMVector GSD file is installed, by expanding the PROFIBUS DP icon in the hardware list, followed by Additional Fieldbus De- vices, then Drives. If the drive you require is not listed, then the GSD file(s) will have to be imported. (See Appendix A later in this document). 3. Expand the SIMATIC 300 icon, and then expand the RACK-300 folder. Drag and drop the Rail icon in to the large left hand window. This will then produce a Rail list as shown below Page 4 Lenze DS47 PLC icon Hardware Configuration icon 4. Expand the PS-300 folder then drag and drop the appropriate PLC power supply icon in to the Rail List slot 1 5. Expand the CPU-300 folder, expand the appropriate CPU type folder then drag and drop the appropriate CPU to the Rail List slot 2. As shown. (The CPU 318-2 model was used as the basis of this application which has a built in PROFIBUS- DP port). 6. The PROFIBUS Network Properties window will automatically open (see below). Set the Master Address to the required value and then select New Page 5 Lenze DS47 7. In the Properties-New subnet PROFIBUS window enter the network and author names, any other useful information can be entered into the comments box. Switch to the Network Settings tab. Select the required Transmission Rate and set the Profile to DP. Select OK to finish. 8. The Interface Properties window will return but this time displaying the subnet data. Select OK to finish and return back to the Hardware Configuration window. Page 6 Lenze DS47 9. If all the data has been entered correctly, the Rail List should now display a list of components for the PLC and a chequered bus line labelled with the network name that was chosen, trailing from the right hand side 10. Expand the Profibus DP icon at the top of the Catalogue list. Expand the Additional Fieldbus Devices folder, then the Drives folder. 11. Drag and drop the relevant drive folder on to the chequered Rail List tail. 12. The Properties-PROFIBUS interface window will appear again. Set the Address value to the require node address. Followed by OK to finish. Page 7 Lenze DS47 13. In the Catalogue section, expand the relevant drive folder then drag and drop the required data format to the small lower left window section. (See Appendix B for data format details). 14. Repeat steps 11 and 13 to add as many nodes on to the network as required and save the configuration. 15. Check to ensure that the PLC CPU key / switch is the STOP position. 16. Download the Hardware profile to the PLC, by selecting PLC from the Hardware Configuration toolbar followed by Download to Module… from the drop down menu. 17. When the Select Target Module window opens ensure that the CPU that is to be programmed is highlighted then select OK to finish. Page 8 Lenze DS47 18. Once the PC establishes communications, the Select node address window will open. If there is only one target station for the project then it will automatically be highlight, otherwise select the appropriate station and select OK. 19. The download progress bar will be displayed for the duration of the download, after which the display will revert back to the HW Config window as per Step 13. 20. Check the status LEDs on the PLC before switching the PLC into RUN mode. When in RUN mode the RUN LED should be illuminated. If the BUSF (bus fault) LED is illuminated double check the PositionServo and other slave device set- tings ensuring that they were re-initialised correctly and that their settings match that of the Hardware Configuration. 21. Check Node Status Once initialised and the network detected the module will enter the “Data Ex- change” state, i.e. P419 = 4. If a different status is reported refer to the PROFIBUS-DP Communications Module manual for further details. Page 9 Lenze DS47 Appendix A – Importing GSD Files PROFIBUS Configurator What are GSD files? PROFIBUS-DP master configuration software uses the GSD files to configure the network profile and communications with the relevant devices. For reference many manufacturers offer language specific GSD files for their PROFIBUS devices, in which case the term and file suffix “GSD” is used for their primary language choice and additional files for alternative languages will be named differently, so for example with many European manufacturers where English is not the primary language it may be possible to obtain GSD and GSE files where the GSE file will have been coded so that the user configuration software displays the data within the GSE file in English etc. GSD files are available form Lenze-ACTech website. GSD Files Installation 1. This procedure only needs to be performed once or after GSD file changes. 2. Launch the “Simatic Step 7” software. 3. Launch the Hardware Configuration sub package from within the main Simatic Manager. 4. If an existing project opens, close it. 5. Select Options from the menu followed by Install New GSD. Page 10 Lenze DS47 [...]... the variable table to monitor, this will allow the PC to either monitor or modify the PLC registers (the PLC mode selection key will have to be in the RUN-P position) See on the following page Lenze DS47 Page 14 5 To enable the variable table to monitor constantly, select the glasses icon 6 Enter the required values in to the watch window Set MW2 to “1” Set MW4 to “250” Set MW6 to ”-250” The value... interrupts, ref to the Step 7 manager software help for details (OB35 has a default scan time 100ms) Lenze DS47 Page 13 2 Connect to the PLC CPU using the appropriate PC to PLC adapter 3 Compile and download the program shown, then go on-line and set the PLC key into RUN mode 4 Once the program has been downloaded successfully into the PLC, select PLC from the toolbar followed by Monitor/Modify variables... function calls within the PLC must be used to ensure consistency of data is maintained In the case of the Siemens Simatic software these are: • SFC14 to perform a write • SFC15 to perform a read Lenze DS47 Page 12 Appendix C - Example Ladder Logic Program Example Program 1 Configure a network with just the PLC and a single Drive connected to the PROFIBUS -DP network 2 Configure the PLC as described and ensure... bus together This format allows data values to be transferred directly to and from the peripheral I/O registers and therefore is simpler to implement when writing the PLC code Consistent Data transfer ensures that all data bytes are written to the data bus at the same time This can be useful as it prevents data skew This occurs when the data high and data low words of a reference are not transferred to. .. PROFIBUS -DP network is controlled automatically by the system in the PLC The transfer of data values over the network must be initiated form the PLC program itself There are two ways of transferring data between the PLC and the remote nodes, the choice of which depends up on the nature of the application Non-consistent Data transfer can be used if there is no need to ensure new references are transferred to. .. PROFIBUS -DP node address on the drive is set correctly and ensure that the default mappings are selected within the drive 3 The example program given below will generate a triangle wave reference, and transfer the data value over PROFBUS- DP to the Drive The transmitted value will be seen in parameter VAR_IREF Using Simatic Step 7 - LAD/STL/FBD Editor 1 Enter the following ladder logic program into OB35,... button to navigate to the folder that GSD file(s) are located in Select either an individual or all available GSD files then click on the Install button 7 Acknowledge the caution that pops up, OK the message when installation complete then click on Close 8 The HW Config screen will re-appear The GSD file(s) will now be available and will be listed as shown: Lenze DS47 Page 11 Appendix B - PROFIBUS -DP. .. “250” Set MW6 to ”-250” The value of MW0 should now ramp to 250 (25.0Hz) and down to 0 then through to –250 before repeating the cycle 7 Ensure the drive hardware RUN and Network Enable are active MW20 is used to access the SMV Control Word, which is constructed as follows (see the PROFIBUS Reference Guide for more details):- Writing a value of 0x0061 to MW20 will set BITs 0, 5 and 6 of the control word