ABB TPU2000 - Page 4

TPU2000/2000R Modbus/Modbus Plus Automation Guide
iv
Modbus Plus Global Register Mapping (37 Registers Defined) TPU2000R Only..................................................205
User Definable Register Configuration Block .........................................................................................................209
Modbus ASCII Communication Test Example .......................................................................................................225
Calculation of the LRC (Longitudinal Redundancy Code)......................................................................................226
Modbus CRC-16 Calculation ..................................................................................................................................226
TPU2000/TPU2000R Modbus Exception Response Analysis ...............................................................................227
Modbus Troubleshooting Tips ................................................................................................................................228
TPU2000/TPU2000R Modbus ASCII Communication Timing Analysis.................................................................229
Modbus Baud Rate Analysis ..................................................................................................................................230
TPU2000/TPU2000R Throughput Analysis............................................................................................................232
Final Throughput Calculation and Analysis ............................................................................................................232
Modbus Plus Troubleshooting ................................................................................................................................234
Modbus Plus Throughput .......................................................................................................................................235
Appendix A-TPU Standard 10 Byte Protocol Document ........................................................................................237
Appendix B-ASCII Conversion Table .....................................................................................................................328
Appendix C-Modbus Plus Communication Between an ABB Protective Relay and a Modicon PLC ....................331
Appendix D-Telebyte RS232/485 Converter Connection to ABB Protective Relays .............................................338
The following are trademarks of AEG Schneider Automation Inc.
Modbus, Modbus Plus, Modicon
IBM, OS 2, and IBM PC are registered trademarks of International Business Machines Corporation.
The following are registered trademarks of the Microsoft Corporation:
Windows NT Windows 3.1
Windows 95 Windows 98
Hyperterminal MS-DOS
Microsoft 
USDATA is a registered trademark of the USDATA Corporation.