Profibus pa

Solo disponible en BuenasTareas
  • Páginas : 34 (8359 palabras )
  • Descarga(s) : 0
  • Publicado : 21 de octubre de 2010
Leer documento completo
Vista previa del texto
Technical Information

PROFIBUS-PA

4
Part 4 Communications

Technical Information
Part 1: Part 2: Part 3: Part 4: Part 5: Part 6: Fundamentals Self-operated Regulators Control Valves Communication Building Automation Process Automation

Should you have any further questions or suggestions, please do not hesitate to contact us: SAMSON AG V74 / Schulung Weismüllerstraße 3 D-60314Frankfurt Phone (+49 69) 4 00 94 67 Telefax (+49 69) 4 00 97 16 E-Mail: schulung@samson.de Internet: http://www.samson.de

Part 4 ⋅ L453EN

PROFIBUS-PA
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ISP specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Device certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 9 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Terminology: master and slave . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 OSI layer model . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Physical layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4Segment coupler . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4Intrinsic safety and power supply over the bus . . . . . . . . . . . . . . . 17

4Device connection and bus termination . . . . . . . . . . . . . . . . . . . 20 4Network topologies of a PROFIBUS system . . . . . . . . . . . . . . . . . 21
Security layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234Bus access and addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4Telegram structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4Performance data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4Layer-2 communication services . . . . . . . . . . . . . . . . . . . . . . . . 26
User interface . . . . . . . . . . . . . . . .. . . . . . . . . . . . 27 DDLM and user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Device Database Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SAMSON AG ⋅ 99/12

Device profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4Classification of parameters . . . . . . . . . . . . . . . . . . . . . .. . . . . 31

CONTENTS
3

4IEC 61158-2 transmission technique . . . . . . . . . . . . . . . . . . . . . 18

Communications ⋅ PROFIBUS-PA

4Function block model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4PROFILE A and B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Device description and Field Device Tool specification . . . . . . . .. . . 37 Communication sequence and error protection mechanisms . . . . . . 39 Appendix A1: Additional literature . . . . . . . . . . . . . . . . . . 41

CONTENTS

4

SAMSON AG ⋅ V74/ DKE

Part 4 ⋅ L453EN

Introduction
PROFIBUS-PA is one of three PROFIBUS variants that are compatible with each other. PROFIBUS is a vendor-independent, open bus system which was standardized in the GermanDIN 19 245. In March 1996, this standard was embedded into the European standard EN 50170 Volume 2 without modifications. PROFIBUS-PA specifications used to be laid down in DIN E 19245 Part 4 (E = draft). Now, the CENELEC TC 65 CX standardization committee has integrated new specifications in EN 50170 as an appendix. The following variants have been specified for different applications (Fig. 1):three PROFIBUS variants

4 PROFIBUS-FMS (Fieldbus Message Specification), 4 PROFIBUS-DP (Decentralized Periphery), and 4 PROFIBUS-PA (Process Automation).

EN 50170 Vol.2 and DIN 19245 E Part 4 automation for general purposes PROFIBUS-FMS universal wide range of applications
device profiles branch profiles

manufacturing automation PROFIBUS-DP fast efficient cost effective

process...
tracking img