Rockwell Automation 2711P Creating Modbus Applications - Manual (Page 69)

69 Publication 2711P-UM002B-EN-P - March 2007
Appendix
C
Modbus ASCII Address Definitions
This appendix describes valid tag addressing for Modbus ASCII
communications. This information is also available in the Modbus
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
Type Boolean
Format 0xxxxx
Security Read/Write
Range 000001 - 065535
Input Coils
Decimal Addressing
Type Boolean
Format 1xxxxx
Security
Read
(1)
(1) For unsolicited device 127.0.0.1.0, these locations are Read/Write.
Range 100001 - 165535