Rev. 0 - 05/11/2020
OPERATING MANUAL
OPERATING MANUAL
EN
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Broadcast Address
The Broadcast address is 0.
1-Phase
3-Phase
1.05kW
2.1kW
2.65kW
4kW
Baud rate
9600
9600
9600
9600
Parity and Stop Bits
0
0
0
0
Modbus Address
1
1
1
1
UART (OFFLINE) Default Communication Parameters
1-Phase
3-Phase
1.05kW
2.1kW
2.65kW
4kW
Baud rate
9600
9600
57600
57600
Parity and Stop Bits
0
0
0
0
Modbus Address
1
1
1
1
Changing the Baud rate has an immediate effect, while the other communication parameters require the complete
fan power off and consequently power on (wait until the complete discharge of the capacitors and the led turning off,
otherwise the changes are not written into the EEPROM).
17.1 Temporary holding register
The
Holding Register 66
is a special register used in each operating mode for setting the speed, the airflow, the slip and the PID
reference.
It is not a physical register and it can be written, but it is not possible to read its value. The setting remains active until the fan is
powered on.
If the fan is powered off but there is a residual charge, the microcontroller of the driver is still functioning. Therefore, if
it is powered on in this situation the value set through the register 66 is still active.
17.2 Fixed holding register
The drivers Holding Registers permanently stored into the EEPROM are 64, but only 26 registers are modifiable by the end user
(see the table in the following page).
The most important
Holding Register 34
is the
Input Type
related to the selection of the Operating Mode.
When the timeout occurs, the driver goes in alarm condition and the communication must be restored and the alarm must be
cleared. The alarm is indicated in the Input register 17 with the value of 255 (0xFF).
Modbus Address
The slave device address can be changed from value 1 to 247 by modifying the
Holding Register 45
.
The default address from factory configuration is 1.
RS-485 Default Communication Parameters
