ABB AC 800M

3BDS009029R5001 B 5
Table of Contents
About This User Manual
General ..........................................................................................................................9
How to Use this User Manual ..........
...............................................................................10
User Manual Conventions ........
.......................................................................................10
Warning, Caution, Information, and Tip Icons................................................................10
Terminology.....................................................................................................................11
Released User Manuals and Release Notes.....................................................................14
Section 1 - Introduction
General Overview............................................................................................................17
The PROFIBUS Protocols....................................................................................18
PROFIBUS Technology Terms ............................................................................20
Transmission Technology Overview ...............................................................................22
FISCO (Fieldbus Intrinsically Safe Concept)..................................................................23
Section 2 - Transmission Technology
RS485 Transmission Technology ....................................................................................25
AC 800M and CI854(A).......................................................................................25
RS485 cable type and speed.................................................................................26
RS485 network limits...........................................................................................28
Adding field devices to the RS485 network.........................................................30
RS485 cycle time calculation...............................................................................31
RS485 installation recommendation ....................................................................32
RS485-IS Transmission technology ................................................................................32
MBP (IEC 61158-2) Transmission Technology ..............................................................33
MBP cable type and speed ...................................................................................33