Write the speed of the drive via Modbus
The drive speed can be changed via the Modbus register 42102, see Data mapping.
Example of an inverter with the node address 1:
Request frame by the master
Slave address Funcon code Data Checksum (CRC)
Register address Network setpoint frequency (0.01)
0x01 0x06 0x08 0x35 0x04 0xD2 0x19 0x39
Response message from the inverter
Slave address Funcon code Data Checksum (CRC)
Register address Network setpoint frequency (0.01)
0x01 0x06 0x08 0x35 0x04 0xD2 0x19 0x39
The drive now rotates with a frequency of 12.34 Hz.
Read the drive speed via Modbus
The drive speed can be read out via the Modbus register 42002, see Data mapping. For read-
ing a single register or several connected register blocks, the funcon code 3 is used, see
Funcon codes.
Example of an inverter with the node address 1:
Request frame by the master
Slave address Funcon code Data Checksum (CRC)
Register address Number of words
0x01 0x03 0x07 0xD1 0x00 0x01 0xD5 0x47
Response message from the inverter
Slave address Funcon code Data Checksum (CRC)
Read bytes Frequency (0.01)
0x01 0x03 0x02 0x04 0xD1 0x7A 0xD8
The drive rotates with a frequency of 12.33 Hz.
Conguring the network
Modbus RTU
Short setup
293