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5.6.3 Speed adjustment
Correspondence table between the fan speed and the input signal in VAV mode:
KUBAIR F400 ECOWATT
®
speed in rpm
Input signal
355 400/450 500
630
710
Potentiometer
graduation
Voltage (V) at
terminal 5
Value in the Modbus register
Holding Registers 0
200
200
200
200
200
0
0
0
530
460
460
400
410
2
2
2 000
850
720
720
600
620
4
4
4 000
1180
980
980
790
830
6
6
6 000
1500
1240
1240
990
1040
8
8
8 000
1830
1500
1500
1180
1250
10
10
10 000
For information: Qv2 = Qv1 x (N2/N1), with N the fan speed and Qv the volume airflow.
Modbus register
On/Off via Modbus
In Coil Stat Bits
0x01: Reading a register
0x05 : Writing a register
Register
Address
Function
Value
Status
0x0001
0
ON/OFF motor
0-1
0 - ON
1 - OFF
Speed setpoint by Modbus
In the Holding Registers
0x03 : Reading a register
0x06 : Writing a register
Register
Address
Function
Scale
Resolution
Unit
4x0001
0
Speed setpoint
0-10000
0.01
%