Rockwell Automation 1758-RTU202 DataSite Software User Manual FRN 1.2 - Manual (Page 281)

Publication 1758-UM002D-EN-P - October 2010
Extension Modbus Protocol for DataSite Controllers (1758-FLO) 281
Addresses Associated with
the Extension Modbus
Protocol Commands The two blocks, buffer 1 and buffer 2, have different meanings for different
commands. The following table provides the register address, data type,
attribute and description for each command.
Pass Code for User
When the host computer communicates with the 1758-FLO DataSite
controller, you need to use the pass code to protect data. If you lose the
password, you can read it from the register 33001…33002. It is a long UINT
integer. The default value is zero.
Register addresses for Extension Modbus protocol commands
Address Data Type Attribute Description
49025 u_short RW Command number (> 0)
49026 u_short R Return code (0 = OK)
49027 u_short W Meter run (0…7)
49028 u_int W Pass code for user. Default is 0.
49030…
49034 undetermined RW Command parameter block buffer 1, 5
registers
49035…
49290 undetermined RW Command parameter block buffer 2,
256 registers