Lenze i550 - Page 413

Write the speed of the drive via Modbus
The drive speed can be changed via the modbus register 42102, see:
4Data mapping ^ 419
Example of an inverter with the node address 1:
Request frame by the master
Slave address Funcon code Data
Register address Network setpoint frequency (0.01)
0x01 0x06 0x08 0x35 0x04 0xD2
Response message from the inverter
Slave address Funcon code Data
Register address Network setpoint frequency (0.01)
0x01 0x06 0x08 0x35 0x04 0xD2
The drive now rotates with a frequency of 12.34 Hz.
Read the drive speed via Modbus
The drive speed can be read via the Modbus register 42002, see:
4Data mapping ^ 419
The funcon code 3 is used to read a single register or several interrelated register blocks, see:
4Funcon codes ^ 417
Example of an inverter with the node address 1:
Request frame by the master
Slave address Funcon code Data
Register address Number of words
0x01 0x03 0x07 0xD1 0x00 0x01
Response message from the inverter
Slave address Funcon code Data
Read bytes Frequency (0.01)
0x01 0x03 0x02 0x04 0xD1
The drive rotates with a frequency of 12.33 Hz.
Restart of the communicaon
A restart of communicaon is required aer changes of the interface conguraon (e. g. node
address and baud rate) in order that the changed sengs become eecve.
For restarng communicaon, there are two opons:
a)
Switch inverter o and on again.
b)
0x2320 (P508.00) Set = "Restart with current values [1]".
Parameter
Address Name / seng range / [default seng] Info
0x2320
(P508.00)
Modbus communicaon
(Modbus comm.)
1 = restart communicaon in order that changed sengs of the interface
conguraon become eecve.
0 No acon/no error
1 Restart with current values
Conguring the network
Modbus RTU
Commissioning
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