INVT Goodrive270 Series Operation Manual page 323

Goodrive270 series VFD for fan and pump Communication protocol
If the operation is successful, the following response is returned:
01 10 00 0B 00 02 30 0A
Parameter
VFD Continuous Parameter
CRC
address write address quantity
command
Note: In the preceding command description, spaces are added to a command just for explanatory
purposes. In practical applications, no space is required in the commands.
9.4.7.4 Example of Modbus communication commissioning
A PC is used as the host, an RS232-RS485 converter is used for signal conversion, and the PC serial
port used by the converter is COM1 (an RS232 port). The upper computer commissioning software is
the serial port commissioning assistant Commix, which can be downloaded from the Internet.
Download a version that can automatically execute the CRC check function. The following figure
shows the interface of Commix.
First, set the serial port to COM1. Then, set the baud rate consistently with P14.01. The data bits,
check bits, and stop bits must be set consistently with P14.02. If the RTU mode is selected, you need
to select the hexadecimal form Input HEX. To set the software to automatically execute the CRC
function, you need to select ModbusRTU , select CRC16 (MODBU SRTU), and set the
start byte to 1. After the auto CRC check function is enabled, do not enter CRC information in
commands. Otherwise, command errors may occur due to repeated CRC check.
The commissioning command to set the VFD whose address is 03H to be forward running is as
follows:
03 06 20 00 00 01 42 28
VFD Parameter
Write
CRC
Forward running
address address
command
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