Nicotra Gebhardt DDMP 10/10, Руководство по эксплуатации

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Rev. 0 - 05/11/2020
OPERATING MANUAL OPERATING MANUAL
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The following figures show a set of performance curves at different speed settings limited by the fan max working limit curve (see
paragraph 1.6).
10.1.4 Speed control curves: example
10.2 Constant airflow
(INPUT TYPE = 4)
Through this setting the constant airflow is proportional to the analog voltage input.
Each fan has default lower and higher limit for the constant airflow curves that can be increased by modifying the Holding Register
42 and the Holding Register 43 .
The choice of reducing the Constant Airflow Range is depending on the user application and it is especially useful when the appli -
cation must guarantee a defined minimum constant airflow.
The selectable airflows are restricted to a minimum and/or maximum defined range for each fan size.
The lower limit avoids big deviations from the constant airflow while the high limits are determined by the Safe Operating Area.
10.2.1 Analog constant airflow
(INPUT TYPE = 5)
Through this setting the fan runs at the constant airflow defined by modifying the Holding Register 66 .
The setting is maintained meanwhile the fan is powered on and it is lost when the fan is powered off.
10.2.2 Modbus temporary constant airflow
(INPUT TYPE = 5)
Through this setting the fan runs at the constant airflow defined by modifying the Holding Register 39 .
The setting is permanent and fan starts at the defined constant airflow each time it is powered on.
10.2.3 Modbus fixed constant airflow
The driver microcontroller elaborates only speed and current data to obtain the constant performance, but it cannot
recognize airflow and static pressure values. Therefore, these values are not available in the driver Input Registers. The max
resolution from on constant airflow to another is +/-50m3/h. The max precision guaranteed is SET A/- 100 m3/h.
In the instability areas typical of some fan sizes the constant airflow precision can’t be guaranteed. It’s anyway suggested
to work outside these areas.