PROFIBUS | |
---|---|
Protocol Information | |
Type of Network | Device Bus, Process Control |
Physical Media | Twisted pair, fiber |
Network Topology | Bus |
Device Addressing | DIP switch or hardware/software |
Governing Body | PROFIBUS&PROFINET International (PI) |
Website | www.profibus.com |
OSI-Layer | PROFIBUS | ||||
---|---|---|---|---|---|
7 | Application | DPV0 | DPV1 | DPV2 | Management |
6 | Presentation | -- | |||
5 | Session | ||||
4 | Transport | ||||
3 | Network | ||||
2 | Data Link | FDL | |||
1 | Physical | EIA-485 | Optical | MBP |
SD1 | DA | SA | FC | FCS | ED |
SD2 | LE | LEr | SD2 | DA | SA | FC | DSAP | SSAP | PDU | FCS | ED |
SD3 | DA | SA | FC | PDU | FCS | ED |
SD4 | DA | SA |
SD | Start Delimiter |
LE | Length of protocol data unit, (incl. DA,SA,FC,DSAP,SSAP) |
LEr | Repetition of length of protocol data unit, (Hamming distance = 4) |
FC | Function Code |
DA | Destination Address |
SA | Source Address |
DSAP | Destination Service Access Point |
SSAP | Source Service Access Point |
PDU | Protocol Data Unit (protocol data) |
FCS | Frame Checking Sequence, calculated by simply adding up the bytes within the specified length. An overflow is ignored here. |
ED | End Delimiter (= 0x16) |
SAP (Decimal) | SERVICE |
---|---|
Default 0 | Cyclical Data Exchange (Write_Read_Data) |
54 | Master-to-Master SAP (M-M Communication) |
55 | Change Station Address (Set_Slave_Add) - SAP55 is optional and may be disabled if the slave doesn't provide non-volatile storage memory for the station address. |
56 | Read Inputs (Rd_Inp) |
57 | Read Outputs (Rd_Outp) |
58 | Control Commands to a DP Slave (Global_Control) |
59 | Read Configuration Data (Get_Cfg) |
60 | Read Diagnostic Data (Slave_Diagnosis) |
61 | Send Parameterization Data (Set_Prm) |
62 | Check Configuration Data (Chk_Cfg) |
Description | Pos. | ||
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PROFIBUS Handbuch PROFIBUS Manual A collection of information explaining PROFIBUS networks assembled by Prof. Max Felser. This Book is now also available in English! Click here. Eine Sammlung | 0 | 3 | |
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