Emerson DL8000 - Mapping Modbus Registers; Modbus Registers

DL8000 Preset Instruction Manual
Revised February-2016 Communications Protocols D-73
D.4 Mapping Modbus Registers
ROCLINK 800 provides Modbus register tables you use to map
Modbus registers to TLP (Point Type, Logical, and Parameter) numbers
in the DL8000. To access these tables, select Configure > Modbus >
Registers from the ROCKLINK 800 menu bar. The Modbus Registers
screen displays.
Figure D-1. Modbus Registers
Note that you have up to 15 entries per table, and up to 24 available
register tables.
You can map one line on the Modbus Registers screen to more than one
register to a TLP pair using either point indexing or parameter indexing:
 Point Indexing maps the Start Register to the selected TLP. You
map subsequent registers (through the End Register) to the same
point type and parameter and increment the point logical number.
 Parameter Indexing also maps the Start Register to the selected
TLP. You map subsequent registers (through the End Register) to
the same point type and point logical number, but increment the
parameter number.
For example, with Point Indexing the configuration of:
Starting Register Ending Register Device Parameter(s) Indexing Conversion
100 103 AIN, 4-1, EU Point 0