Nicotra DDMP Series Operating Manual page 23

Configurable Modbus Address
The driver has 1 as default address for Modbus communication.
Modifying the Holding Register 45 is possible to have a daisy chain communication between several fans.
The max number of devices that can be differently addressed is 255.
All devices will reply also to the address 1 in addition to other set values.
This presents two main advantages:
- If the address of a driver is unknown it is possible to determine it by powering only one driver each
time though the address 1.
- If several inverters are connected to the same bus, all can be stopped or set at the same speed by
sending one command to the address 1.
Fan Limits
In the table 3 are indicated the fan limits: fan min and max speed, motor max current and Driver max
absorbed power.
SIZE SIZE
1KW DRIVER 2KW DRIVER
NONE NONE
DDMP 7/7 Tight
DDMP 7/7
DDMP 7/9
DDMP 8/7 Tight
DDMP 9/7
DDMP 8/9 Tight
DDMP 225/240
DDMP 9/9
DDMP 10/8
DDMP 10/10
DDMP 9/9
DDMP 10/8
DDMP 10/10
DDMP 12/9
DDMP 12/12
Changing the speed, current and power limits:
DON'T SET VALUES OUTSIDE THE LIMITS INDICATED IN TABLE 2.
The fan components could be damaged and dangerous condition for the user may occur.
(example: wheel explosion if the max speed register is set for a too high speed)
th
Rev. 2 – 10 November2015
FAN LIMITS
Valu Driver Motor
e in code Code
REG
44
0 0 0
1 1431A5 1416A3
2 1431A5 1416A0
3 1431A5 1416A1
4 1431A5 1416A0
5 1431A5 1416A0
6 1431A5 1416A1
7 1431A5 1416A1
8 1431A5 1416A1
9 1431A5 1416A2
10 1431A5 1416A2
1 1431A8 1416A4
2 1431A8 1416A4
3 1431A8 1416A4
4 1431A8 1416A4
5 1431A8 1416A4
Table 3 – DDMP speed limits
23
Min Max Min
speed Speed Const.
[rpm] [rpm] Airflow
[m3/h]
0 0 0
400 3000 1000
400 2000 500
400 2000 1000
400 2000 750
400 2000 1000
400 2000 1000
400 2000 1000
400 2000 1000
400 2000 1000
400 2000 1000
200 2000 1000
200 2000 1000
200 2000 1000
200 1600 1500
200 1600 1500
Max Max Max
Const. Current power
Airflow [mA] [W]
[m3/h]
0 0 0
1950 4500 1050
3000 4500 1050
3500 4500 1050
2750 4500 1050
3000 4500 1050
3250 4500 1050
3250 4500 1050
3250 4500 1050
3750 5500 1050
4000 5500 1050
5000 8300 2100
4500 8300 2100
5000 8300 2100
4500 8300 2100
5000 8300 2100