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Contents XPS/XPS-E User's Manual 3.3 Send and Receive Data It is generally possible in both modes to send and receive data simultaneously. The request telegrams described in the previous chapters then have to be completed only by the entries of the transmission command (transmission command number, length of transmission data, data). Please note that the data are only accepted and transmitted by the XPS/XPS-E if the transmission command number in the data_exchange.req telegram to the XPS has changed. PROFIBUS Data Traffic DP-Master 1 X 5 SEN XPS/XPS-E TE DATA_EXCHANGE.REQ DATA_EXCHANGE.RES Receive Buffer XPS/XPS-E S 1 2 TE X = Receive Request Number S = Status Figure 7: Combined Send- and Receive Request 22 COMSOFT
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