Rockwell Automation 1758-RTU202 DataSite Software User Manual FRN 1.2 - Manual (Page 103)

Publication 1758-UM002D-EN-P - October 2010
DataSite Configuration Settings Utility (DS Settings) 103
Allocate Registers Module internal registers are divided into four types:
• Coil_Register
• State_Register
• Input_Register
• Hold_Register
Coil_Register and State_Register are single-bit registers. Every register address
corresponds to a binary bit.
Input_Register and Hold_Register are 16-bit registers.
Read and Write Registers
Internal registers of the DataSite controller can be read and written via the
Controller Debug tool in DS Settings. For details, see
Debug the Controller
Programs on page 83 .
By configuring scan blocks, you can set internal registers of other devices to be
read into the DataSite controller. After that, you can read and write these
registers via the Controller Debug dialog box in the DS Settings tool. For
methods of configuring scan blocks, see
Settings on page 35 .
Modbus addresses of internal registers
Register name Modbus address Features
Coil_Register 00001-04096 1-bit
State_Register 10001-14096 1-bit
Input_Register 30001-31024 16-bit
Hold_Register 40001-49999 16-bit