ProfibusDP

PROFIBUS DP the fastest field bus systemclass 1 master -central controller which exchanges data with theseveral class1 masters are permitted, typical devices arediagnostic and startup tool, typically a configuration toolmaster-master, master-Reading Configurationa device can consist of multiple functions, e.g.... class1 and class2, class1 and slaveA device can consist of multiple functions, e.g... class1and class2, class1 and slave, which allows:a simple master master communication via the master -whenever one master has the token the other PLC can be aPLCMaster -Master communication by using a DP-DP gateway combination of two mono master systemssimple data exchange between the two masters up to 244PLCOpen Configuration permits Plug and PlayGSD fileeach slave or master class 1 device on PROFIBUS DP needs to have a device description file, the characteristic of each PROFIBUS-DP device is described in the GSD-Filethe GSD-file contains all device specific parameters e.g.:GSD-Files are created by the device vendorsthe PROFIBUS Trade Organization provides an GSD-Editor the GSD-Editor contains a GSD-Checker which guarantees a library of GSD-Files is provided at the PROFIBUS web#P r o fib u s_D P:<P R M-T e x t_D e f_L is t> P r m T e x t=……..E n d M o d u le ext. user parameter data (O) mandatory general data (M) generic slave data (M)#Profibus_DPdevice name (which will be displayed in the- unique Identification number, each slaveand master class 1 device needs to haveProtocol_Ident=0defines supported protocols, 0- DP, 1- DP/FMSall supported baudrates, between 9.6kBaudmax. answering time related to the baudrateFreeze_Mode_supp=1The application interface needs to offer a capability for theMaster Phys. Outputs∆t∆tsynchronized∆tMaster Phys. Outputs∆t∆tsynchronized∆tAuto_Baud_supp=1device is able to detect the baudratestation address can be set via the PROFIBUSs e.g 100 x 10 = 1msSlave_Family=0defines a expandable or a fixed station,defines the max. length of Output dataFail_Safe=1indicates the behavior of the slave in case of a failureatchdog expired, …)for outputs, in case of a failsafe device the device is either keeping the last valueSlave state machinePower_ON/Character FormatCharacter/Message attributes1 character consists of 11 bitsMessage structure16HDP Communication “Ports”Set_Slave_AddSlave State MachinePower_ON/checked via diagnostic requestParameterizationparameterization will be sent once after Power On or ResetMandatory ParameterizationSD LE LERWD_ON=1, That Is, Response Monitoring Activated( Slave Is to Be Operated in the Freeze Mode)( Slave Is to Be Operated in the Sync Mode)Mandatory ParameterizationWD_Fact_2 TWD (s) = 10ms * WD_Fact_1 * WD_Fact_2Device Related Parameterizationeach device can use Octets 8 -can be used for adjusting values or levels (takes the placeGSD file parameterization information only device related informationExt_User_Prm_Data_Ref(1)=1GSD file parameterization information only module related informationEndModuleconventional wayDIP switches to determine the function per channelconventional way with smarter devicesjsdfehrgihw[orijth]ewj]ypokjeky575687356nj8467knggnhngjtg76nkbvijyuftisdt0iewryt9eiuoriyrywkrowrgowrtohworthorthwrth6buhyijtiu8o67m8m747567n8567n75567nm78m78,om87o,with PROFIBUSjsdfehrgihw[orijth]ewj]ypokjekygadfgsadfhsfghjjsffghsfghfdhsdldajhtviertivetvert34524575687356nj8467knggnhngjtrby5yik57859mnnbvt456hn,g76nkbvijyuftisdt0iewryt9eiuoriyrywkrowrgowrtohworthorthwrthrthwrthrwthtryjtyjyukytyjy7u79jtyu568566utrtjhyuiuikujkhyjiyuiyuiithjyukiuio7ujtyujytuoiukytyjyukuikyukuiluiliuioliuiluiil6buhyijtiu8o67m8m747567n8567n75567nm78m78,om87o,56nu78m,,9o,0p.90.p;0;.;’-;/ end customer defines every function in oneSPC 3 Code for Parameterizationneeds to be checked if more than 7 bytes are usedcheck parameters contained in message (OK or Not OK)SPC 3 code for parameterization check (example)Slave State MachinePower_ON/checked via diagnostic requestConfigurationConfiguration will be sent once after power on or resetSlave response with short acknowledge as confirmationConfigurationSD LE LErsimple format configurationmax. 16 discrete Input/16 discrete Output in one formatConfigurationSD LE LEr1-14 No. Of Bytes of Vendor Specific Dataspecial format -Length of Vendor Specific Data1-14 No. Of Bytes of Vendor Specific Data01 One Length Byte for Inputs Follows10 One Length Byte for Outputs Follows11 One Length Byte for Outputs and Inputs 1100special format -Length of Vendor Specific Data1-14 No. Of Bytes of Vendor Specific Data01 One Length Byte for Inputs Follows10 One Length Byte for Outputs Follows11 One Length Byte for Outputs and Inputs x x x xModule=”text”module definition, text will be displayed 0x04,0x00,0x00,0xAD,0xC4module definition, text will be displayeddefines simple format with 3 output bytesmodule definition, text will be displayeddefines special format, 2 byte input and 3GSD file configuration information simple configuration informationGSD file configuration informationspecial configuration information with module relatedSPC 3 code for sample configurationmust check for overall lengthconfirms O.K..., not O.K... or update (adapt) configurationSPC 3 code forif(DPS2_GET_IND_NEW_CFG_DATA())cfg_result = DPS2_SET_CFG_DATA_OK();*/if (result == DPS_CFG_UPDATE)Slave State MachinePower_ON/diagnostic request。