ADS Environmental Services ADS TRITON+ QR 775027 A3 - Manual (Page 316)

Modbus 9-11
Modbus Data Registers
This section contains tables providing Modbus registers. The first
table lists the Modbus data register addresses corresponding to the
entities for which the TRITON+ provides output data. The RTU
requests data from the monitor using the designated registers, and
the monitor (through the ExPAC) sends the current entity data
representing those registers back to the RTU. Therefore, the user
must program the RTU with the appropriate registers based on the
type of data desired.
The second table lists the Modbus registers associated with more
general TRITON+ information.
Note: The entities available are based on the sensors used
and the data logged. In addition, all values are floating
point, unless otherwise defined.
Register Addresses for Entity Data
The following table contains the entities currently available for
output and the associated register addresses.
Note: The units of measure are based on the units of
measure with which the monitor has been activated, except
for those noted within the table.
Note: The 03 command (Read Holding Registers) implies
the registers referenced is offset by 0x40000. ADS uses
floating point values that are represented by two registers.
While some documentation starts the register number at
40001, ADS starts the numbering at 40000. Therefore,
simply subtract 40000 from our documented register
number for the Modbus ASCII request.