8.2.7 FB/SFB 8 - USEND - Uncoordinated data transmissionFB/SFB 8 USEND may be used to transmit data to a remote partner FB/SFB of the typeURCV (FB/SFB 9). You must ensure that parameter R_ID of both FB/SFBs is identical.The transmission is started by a positive edge at control input REQ and proceeds withoutcoordination with the partner FB/SFB.Depending upon communication function the following behavior is present:n Siemens S7-300 Communication (FB 8)– The data is sent on a rising edge at REQ. The parameters R_ID, ID and SD_1 aretransferred on each rising edge at REQ. After a job has been completed, you canassign new values to the R_ID, ID and SD_1 parameters.n Siemens S7-400 Communication (SFB 8)– The data is sent on a rising edge at REQ. The data to be sent is referenced bythe parameters SD_1 ... SD_4 but not all four send parameters need to be used.ParametersParameter Declaration Data type MemoryblockDescriptionREQ INPUT BOOL I, Q, M, D, L Control parameter request, activates the exchange ofdata when a rising edge is applied (with respect tothe most recent FB/SFB-call)ID INPUT WORD I, Q, M, D,constantConnection reference. The ID must be specified inthe form wxyzh.R_ID INPUT DWORD I, Q, M, D,constantAddressing parameter R_ID. FormatDW#16#wxyzWXYZ.DONE OUTPUT BOOL I, Q, M, D, L Status parameter DONE:n 0: task has not been started or it is still being exe-cuted.n 1: task was executed without error.ERROR OUTPUT BOOL I, Q, M, D, L Status parameter ERROR:n ERROR = 0 + STATUS = 0000h– No warnings or errorsn ERROR = 0 + STATUS unequal to 0000h– A Warning has occurred. STATUS containsdetailed information.n ERROR = 1– An error has occurred.STATUS OUTPUT WORD I, Q, M, D, L Status parameter STATUS, returns detailed informa-tion about the type of error.SD_i,1≤ i ≤4 IN_OUT ANY I, Q, M, D, T,CPointer to transmit buffer i..Only data type BOOL is valid (Bit field not permitted),BYTE, CHAR, WORD, INT, DWORD, DINT, REAL,DATE, TOD, TIME, S5TIME, DATE_AND_TIME,COUNTER, TIMER.DescriptionVIPA SPEED7Network CommunicationEthernet Communication > FB/SFB 8 - USEND - Uncoordinated data transmissionHB00 | OPL_SP7 | Operation list | en | 18-30154
