Delta DPM-D510 - 5.2.2 Modbus Communication Protocol

Delta Din-rail Power Meter DPM- D510 User Manual
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5.2.2 Modbus Communication Protocol
Modbus RTU mode is adopted with Modbus Master sending out the Request, in which the Function Code uses
0x03 to request response from Slave to correspond to values in Modbus address. In Response, Modbus Slave
responds to the values of Modbus address in the Master request. The packet format of IEEE754 is used for the
address of floating point numbers that corresponds to the register values found in table 5.2, using 2's
complement packet format. The format are as follows:
Low Word
High Byte Low Byte
High Word
High Byte Low Byte
The packet formats (2’s complement) for the address of integers that corresponds to the register values found
in table 5.2 are shown in the example below.
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