INVT Goodrive3000 Series Operation Manual page 213

Goodrive3000 series medium voltage VFD
Example 2: Set the max. output frequency to 100 Hz for the VFD with the address of 03H.
Function
code
P00.03
See the figures behind the radix point, the fieldbus ratio value of max. output frequency (P00.03) is 100. 100Hz timed by
100 is 10000 and the corresponding hex is 2710H.
The command transmitted from the master is as follows:
If the operation is successful, the following response is returned (same as the command sent from the master):
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.
8.4.7.3 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 host controller 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 end 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
(MODBUSRTU), 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:
Note:
Set the address (P14.00) of the VFD to 03.

Set "Channel of running commands" (P00.01) to "Communication", and set "Communication channel of

running commands" (P00.02) to the Modbus channel.
Name
Max. output
P00.04–400.00Hz
frequency
03 06
VFD Write
address command
03 06
VFD Write Parameter
address command
03 06
VFD
Write
address
command
Description
00 03 27 10
Parameter
Parameter
address data
00 03 27 10
Parameter
address data
20 00 00 01
Parameter
Forward running
address
-207-
Moudbus protocol
Setting range Default
P00.04–400.00 50.00Hz
62 14
CRC
62 14
CRC
42 28
CRC