Rockwell Automation 2711P Creating Modbus Applications - Manual (Page 63)

63 Publication 2711P-UM002B-EN-P - March 2007
Appendix
B
Modbus/TCP Address Definitions
This appendix describes valid tag addressing for Modbus/TCP
communications. This information is also available in the Modbus/TCP
driver online help in KEPServer Enterprise. KEPServer drivers use
decimal addressing.
Output Coils
Example:
The 255th output coil would be addressed as ’0255’ using decimal
addressing or ’H0FF’ using hexadecimal addressing.
Input Coils
Example:
The 127th input coil would be addressed as ’1127’ using decimal
addressing or ’H17F’ using hexadecimal addressing.
Output Coils
Decimal Addressing Hexadecimal Addressing
Type Boolean
Format 0xxxxx H0yyyyy
Security Read/Write
Range 000001 - 065536 H000001 - H01000
Input Coils
Decimal Addressing Hexadecimal Addressing
Type Boolean
Format 1xxxxx H1yyyyy
Security
Read
(1)
(1) For unsolicited device 127.0.0.1.0, these locations are Read/Write.
Range 100001 - 165536 H100001 - H11000