DP concept

[Tom749]

I have questions. (1) What is the exact concept of the DP communication? (2) What is the relative relation between DP address and the real physical IQ address as I attach a picture? (3) How does the DP communication way work basically? (4) Why do we make the DP address and IQ address at the same time as my attachment? (5) What is the mutual relation between DP and IQ address? (6) Are there any reference materials and information for the DP conception at the Siemens web site or in personal? I want to know the conception in the whole meaning. Thanks for your help in advance. Edited June 8, 2011 by Tom749

[Homer_BL]

(1) Transmmiting a lot of signals using two-wire cable. (2) DP addresses are used for diagnostic etc, I Q addresses determines signals to be transmitted. (3) Read SIMATIC NET Communication manual. (4) Insert another master in network, then you will see why. (5) No relation (6) At Siemens site, Automatation -> Communication -> Profibus -> Manuals