User Manual

Modbus 9-11

Modbus Data Registers

This section contains table s p roviding Modbus registers. The first

table lists the Modbus data register ad d r esses 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 pro gram the RTU with the appropriate registers based on the

type of data desir ed .

The second ta ble 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 floa ting

point, unless otherwise defined.

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 ta ble.

Note: The 03 command (Read Holding Register s) implies

the registers referenced is offset by 0x40000. ADS uses

floating point values that are repre se nted 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.