8.1.4 FB 64 - TRCV - Receiving Data - TCP native and ISO on TCPFB 64 TRCV receives data over an existing communication connection. The are two var-iants available for receiving and processing the data:n Variant 1: Received data block is processed immediately.n Variant 2: Received data block is stored in a receive buffer and is only processedwhen the buffer is full.The following table shows the relationships between the connection type is shown in thefollowing table:Connection type Variant01h and 11h The user can specify the variant.12h Variant 2 (fix)The two variants are more described in the following table.Received Data...Range Values forLENRange Valuesfor RCVD_LENDescriptionare available immediately. 0 1 ... x The data go into a bufferwhose length x is specifiedin the ANY pointer of thereceive buffer (DATA param-eter).After being received, a datablock is immediately avail-able in the receive buffer.The amount of datareceived (RCVD_LENparameter) can be nogreater than the size speci-fied in the DATA parameter.Receiving is indicated byNDR = 1.are stored in the receivebuffer. The data are avail-able as soon as the config-ured length is reached.1 ... 1460, if theconnection type = 01h1 ... 8192, if theconnection type = 11h1 ... 1452, if theconnection type = 12h and aCP is being used1 ... 8192, if theconnection type = 12h andno CP is being usedSame value as in the LENparameterThe data go into a bufferwhose length is specified bythe LEN parameter. If thisspecified length is reached,the received data are madeavailable in the DATAparameter(NDR = 1).DescriptionVIPA SPEED7Network CommunicationOpen Communication > FB 64 - TRCV - Receiving Data - TCP native and ISO on TCPHB00 | OPL_SP7 | Operation list | en | 18-30118
