INVT Goodrive300-19 Series Operation Manual page 228

Goodrive300-19 series open loop vector inverter special for hosit Communication protocol
See the figures behind the radix point, the fieldbus ratio value of the Max. output frequency (P00.03)
is 100. 100Hz timed by 100 is 10000 and the corresponding hex is 2710H.
The command sent by the master:
If the operation is success, the response may be as below (the same with the command sent by the
master):
Note: The blank in the above command is for illustration and it cannot be added in the actual
application.
10.4.7.3 Example of Modbus communication commissioning
The master is PC which applies the RS232-RS485 converter to transform signals. The PC serial
interface is COM1 (RS232 interface) and the commissioning software is the interface commissioning
assistant which can be downloaded on the internet. The software with CRC checkout function is the
best selection.
At first, select COM1 for the serial interface, keep the baud rate in accordance with P14.01, and digital
bit, check bit and stop bit the same with P14.02. Due to RTU mode, HEX is selected. It is necessary
to tick out as well as CRC16 (MODBUSRTU) with the initial byte 1 in order that the
software automatically runs along with CRC. Once enabling the CRC function, filling the command
with CRC repeatedly will lead to command error.
The commissioning command is to make the inverter with address 03H run forward (11.4.7.2 example
1).
Note:
Set the inverter address (P14.00) to 03;
Set the running command channel (P00.01) to communication running command channel.
Click send and the response message from the inverter will be received if both the route and setting
are correct.
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