Rockwell Automation 1758-RTU202 DataSite Software User Manual FRN 1.2 - Manual (Page 277)

Publication 1758-UM002D-EN-P - October 2010
Extension Modbus Protocol for DataSite Controllers (1758-FLO) 277
Modbus Registers for the Power Shutdown Time
These registers record the previous shutdown time of the controller.
Modbus Registers for Reading Gas Component Parameters
The gas component parameters can be read from a gas component analyzer
automatically by using Modbus Master scan blocks. Refer to
Settings on page
35 for details on using the Modbus Master scan block. The registers on the
following table are used for saving the parameters read from the gas
component analyzer.
Modbus registers for power shutdown time
Description Data Type Modbus Address
Hour for power off u_short 32911
Minute for power off u_short 32912
Second for power off u_short 32913
Modbus registers for reading gas component parameter
Modbus Addresses in 1758-FLO Controller Description
Datasite FLO used
register user defined register
when using Modbus
Master Scan
32159…32200 48001…48050 Component of meter run 0 (see Offset
structure table on page 277 )
32259…32300 48051…48100 Component of meter run 1
32359…32400 48101…48150 Component of meter run 2
32459…32500 48151…48200 Component of meter run 3
32559…32600 48201…48250 Component of meter run 4
32659…32700 48251…48300 Component of meter run 5
32759…32800 48301…48350 Component of meter run 6
32859…32900 48351…48400 Component of meter run 7
Offset structure table
Data Type Offset Name Description
float 0 CH4 Methane
float 1 N2 Nitrogen
float 2 CO2 Carbon dioxide
float 3 C2H6 Ethane