Modbus 10-11
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: Modbus holding registers start at 40001. To
address them with a Modbus Read Holding Register
command, use an address of 0 (zero), which will return
data for register 40001. ADS uses two Modbus registers
to return one little endian floating point number. Registers
that are not updated by the monitor will contain a value of
-99.0. This number represents the initialization value and
indicates the register is not updated. The registers used are
dictated by the monitor configuration, the type and number
of sensors, and the type of processing desired.
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