Hi, I need to connect a PIC with a PLC using a PROFIBUS protocol. Do you know where I can found a instruction, like: ADDRESS ::: DATA::: CRC (for example) information??? I looked in www.profibus.com and didnt found anything useful, perhaps I didn look fine!? Bye bye Mauricio Jancic Janso Desarrollos (54) 11 4542 3519 Republica Argentina Microchip Consultant Program Member -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.