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PVP260kW Inverter
Installation and Operation Manual
2. Using modbus commands
PV Powered inverters provide basic modbus commands. The supported
commands are listed in the following table.
Command Name
Command
Number
Description
Read Holding Register
03
Retrieves the voltage, power and energy values from
the inverter.
Write (Preset) Single Register
06
Enables/disables the inverter.
Return Slave ID
17
Returns a text string containing the ID number of the
inverter.
Table 5-3 Supported Modbus Commands
Format of modbus commands and responses
Each of the following command sections contain two tables. The first table describes the
format of a modbus command request while the second table contains the format of the
command’s response.
Then the next section,
Modbus Register Maps
, provides additional information about
these commands and their valid registers.
Read Holding Register
The
Read Holding Register
command is used frequently. Typically the modbus master
continually reads the values from registers containing the desired information.
Command Information
Command
Layout
Modbus slave address
nn (1-126)
Command number
03
First register MSB
xx
First register LSB
xx
Number of registers MSB
xx
Number of registers LSB
xx
CRC LSB
xx
CRC MSB
xx
Table 5-4 Format for Read Holding Register, command 03
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