Nicotra Gebhardt PFP, Operating Manual

Page: 44 / 48

Rev. 0 - 05/11/2020
OPERATING MANUAL OPERATING MANUAL
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18.4 Input register description
The Modbus Input Registers are in total 33, but only 14 are useful for the end user.
2 Speed Reference [rpm] 15 Module Temperature [10
-1
°C]
3
Measured Speed [rpm]
17
Alarm 2 [Adim]
9 Bus Voltage [10
-1
V] 28 Enable Input [10/2
16
V]
10 Alarm 1 [Adim] 29 Analog Input [10/2
16
V]
12
Motor Current [mA]
30
Transducer Input [10/2
16
V]
13 Motor Voltage [10
-1
V] 31 Measured Power [W]
14 Analog Input [10
-1
V] 32 Input Current [mA]
Input Register 2: Speed Reference [rpm]
This register indicates the speed reference during the functioning. During the starting phase, it is equal to the Min Speed and then
gradually increases to the target speed depending on the selected mode.
Input Register 3: Measured Speed [rpm]
This register indicates the speed during the functioning.
Input Register 9: Bus Voltage [10
−1
V]
This register indicates the rectified voltage after the PFC stage.
Input Register 10: Alarm 1 [Adim]
This register must be combined with the Alarm2 register (see the table in paragraph 18.2)
Input Register 12: Motor Current [mA]
This register indicates the peak value of the line current module.
To know the rms value, it must be divided by √2.
Input Register 13: Motor Voltage [10
−1
V]
This register indicates the peak value of the phase voltage module.
To know the rms line to line value, it has to be multiplied by √3/2.
Input Register 14: Analog Voltage [10
−1
V]
This register indicates the analog voltage value present at the input.
Input Register 15: Module Temperature [10
−1
°C]
This register indicates the temperature of the power module of the driver. When the value exceeds the temperature threshold,
the driver enters in a derating process where the performances are automatically decreased until a thermal equilibrium below the
temperature threshold is reached. If this equilibrium is not reached, the fan stops and an alarm condition is activated. As soon as
the heating decreases and the power module temperature is below the temperature threshold, the alarm is automatically reset.
This threshold value can be read in Holding Register 29 .
Input Register 17: Alarm 2 [Adim]
This register must be combined with the Alarm1 register.
Input Register 28: Enable Input [Adim]
This input indicates the ENABLE state.
The value must be multiplied by 10V/2
16
to have the corresponding voltage value.
Input Register 29: Analog Input [Adim]
This input indicates the Reference Value.
The value must be multiplied by 10V/2
16
to have the corresponding voltage value.