Rev. 0 - 05/11/2020
OPERATING MANUAL
OPERATING MANUAL
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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
8
Not active
9
Active
10
Active
11
Not active
12
Active
Input type
Enable function
0
Not active
1
Active
2
Active
3
Active
4
Active
5
Not active
6
Active
14. DERATING AND OVERHEATING PROTECTIONS
When the temperature of the driver components overtakes a defined temperature threshold, the performance 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
