I/O System S900Communication Interface for PROFIBUS DP, CI9206 3BDD010422R0101Configuration ...................................................................................................22Variants................................................................................................23Behavior...........................................................................................................23Re-configuration in online mode ..........................................................24Parameterization .............................................................................................25Behavior...............................................................................................26Re-parameterization in online-mode ...................................................26Cyclic data exchange ......................................................................................27I/O data transmission...........................................................................27Non-cyclic services DPV1 ...............................................................................28Functional principle..............................................................................28C1 access ............................................................................................29C2 access ............................................................................................29Multiple access ....................................................................................30S900 and DTM.....................................................................................30Diagnostics ..........................................................................................30Redundancy.....................................................................................................30PROFIBUS line redundancy ................................................................30Redundancy Mode "Off" (0).................................................................32Redundancy Mode "1" .........................................................................33Prerequisites ........................................................................................33Switching criteria..................................................................................34Diagnostics / behaviour in case of failure........................................................34Indicator LEDs .....................................................................................35PROFIBUS - diagnostics .................................................................................35Functional principle..............................................................................35Structure ..............................................................................................36Header .................................................................................................36Status diagnostics................................................................................39Identifier-specific diagnostics...............................................................40Channel-specific diagnostics ...............................................................405. Commissioning.................................................................................43S900 project planning using the GSD file............................................43Commissioning with a master system that does not support GSD file import 44Key features of parameterization mode 1............................................44How to configure an S900 station in mode 1.......................................44How to parameterize a S900 station in mode 1...................................45Commissioning the S900 with Composer/Melody...........................................46Commissioning the S900 with AC800M ..........................................................46Diagnostics ..........................................................................................46Status supervision ...............................................................................47