ABB S900 - 1. About this Document

I/O System S900
Communication Interface for PROFIBUS DP, CI920
3BDD010422R0101 5
TABLE OF CONTENTS
TABLE OF CONTENTS....................................................................................5
1. About this document..........................................................................7
Symbols .............................................................................................................7
Terminology.......................................................................................................8
Related Documentation .....................................................................................8
2. Introduction.........................................................................................9
System features.................................................................................................9
Communication Interface CI920 ......................................................................11
Functionality.........................................................................................11
Supported I/O Modules....................................................................................12
3. System specifications......................................................................13
Required system components .........................................................................13
Requirements on PLC / OCS master systems ................................................13
System Limits ..................................................................................................14
Number of PROFIBUS stations ...........................................................14
Number of I/O Modules........................................................................14
Cycle time ............................................................................................16
4. Communication via PROFIBUS DP V1 ...........................................18
Slave address..................................................................................................18
Conventions .........................................................................................18
Setting the bus address .......................................................................18
Factory setting .....................................................................................20
GSD (generic slave data) file...........................................................................20
Structure of a GSD file.........................................................................20
Module description in the S900 GSD file.............................................21
Compatibility ........................................................................................21