PROFIBUS DP and PROFINET Objectives and outline Lecture ...
PROFIBUS DP and PROFINET Objectives and outline Lecture ... PROFIBUS DP and PROFINET Objectives and outline Lecture ...
PROFIBUS parts Physical layer • Originally RS 485 or fibre optics, today others (RS 485‐IS, MBP) Link layer • Frame coding, medium access, error resolution (CRC, repetition) Protocol parts • PROFIBUS FMS –the oldesT, communication between PLCs • PROFIBUS DP –data exchange between PLC and remote IO, well known, functional enhancements (DP‐V1, DP‐V2) • PROFIBUS PA –process automation, explosive environment, device profiles User Layer Application (7) (3)-(6) Data Link (2) Physical (1) FMS FMS Device Profiles Fieldbus Message Specification (FMS) DP not used Fieldbus Data Link (FDL) RS-485 / Fiber Optic DP Profiles DP V2 DP V1 DP V0 PROFIBUS parts PA PA Profiles MBP Interface MBP 17.10.2012 4
Physical layer RS 485 • Asynchronous character oriented transmission • Transmission speed 9,6 kbit/s – 12 Mbit/s • Maximum segment length 1200 m, resp. 100 m • 9 pin connectors (Canon), minimum of spurs, 32 devices at segment MBP –Manchester Bus Powered • Used by Profibus PA • Explosive environment, power from bus • Synchronous coding • Coupler power the whole segment • Device does not provide power when transmitting – passive load • Can be connected and disconnected during operation Physical layer 17.10.2012 5
- Page 1 and 2: PROFIBUS DP and PROFINET Principles
- Page 3: • Main master -hierarchy - Master
- Page 7 and 8: token PLC PLC class token 1 class t
- Page 9 and 10: Set_Slave_Add Slave_Diag Chk_Cfg, n
- Page 11 and 12: PROFIBUS DP extended functions DP
- Page 13 and 14: OB86 - rack failure • Loss of com
- Page 15 and 16: Simatic S7 -OB86 • LB11 - Profibu
- Page 17: Thank you for your attention. Pavel
Physical layer<br />
RS 485<br />
• Asynchronous character oriented transmission<br />
• Transmission speed 9,6 kbit/s – 12 Mbit/s<br />
• Maximum segment length 1200 m, resp. 100 m<br />
• 9 pin connectors (Canon), minimum of spurs, 32 devices at<br />
segment<br />
MBP –Manchester Bus Powered<br />
• Used by Profibus PA<br />
• Explosive environment, power from bus<br />
• Synchronous coding<br />
• Coupler power the whole<br />
segment<br />
• Device does not provide power<br />
when transmitting – passive<br />
load<br />
• Can be connected <strong>and</strong><br />
disconnected during operation<br />
Physical layer<br />
17.10.2012<br />
5
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