Rev. 1 - 05/10/2021
OPERATING MANUAL
OPERATING MANUAL
EN
EN
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13. OTHER VARIABLES
There are other variables that can be monitored for a safe use of the fan.
13.1 Bus voltage
The BUS voltage is the DC voltage on the bus capacitors. The driver is continuously monitoring this voltage
and will stop the motor in the event of under-voltage or over-voltage.
The value can be monitored through the
Input Register 9.
13.2 Motor voltage
The motor voltage is the peak value of the phase voltage module. To know the rms line to line value, it must
be multiplied by √3/2. The value can be monitored through the
Input Register 13.
13.3 Enable Function (for 3-phase only)
A safety enable function is available and it is active for the Operating Modes in the following table.
The value can be monitored through the
Input Register 28.
Input type
Enable function
7
Active
2
8
Not active
2
9
Active
2
10
Active
11
Not active
12
Active
Input type
Enable function
0
Not active
1
Active
2
Active
3
Active
4
Active
1
5
Not active
1
6
Active
1
14. DERATING AND OVERHEATING PROTECTIONS
When the temperature of the driver components overtakes a defined temperature threshold, the perfor-
mance is automatically reduced to decrease the heating. It is possible to check in real time the temperature
by reading the
Input Register 15.
If it is not possible to reach a steady thermal equilibrium, the driver shuts down. The protection acts limiting
the current to the motor. In this condition the driver goes in alarm (see chapter 18).
Once the temperature on the driver decreases under 75°C, the alarm is automatically reset.
14.1 Driver overheating: DERATING
(1)
The operating mode “Constant Airflow” is not available for RDPs. Setting the fan in one of the three Constant
Airflow modes could make it turn in an unknown and/or uncontrollable manner.
(2)
The algorithm related to the operating mode "Asynchronous Emulation" does not produce
significant differences on RDPs in comparison to the operating mode "Speed control". Therefore,
its use is not recommended.
WARNING
WARNING
