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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16. VARIABLE SWITCHING FREQUENCY (for 3-phase - 4 kW only)
This feature is used to increase the efficiency and to decrease the heating of the fan. At slow fan speed the driver switching fre -
quency is set at its maximum value 14kHz, while at high speed, the switching frequency is reduced to 8kHz. In this situation the
noise generated by the lower switching frequency is covered by the higher fan noise.
17. COMMUNICATION
Protocol interface:
MODBUS RTU (RS485 or Bluetooth)
Baud rate
The baud rate can be set through the Holding Register 47 and the possible speeds are:
RS-485 CABLE : 9.6kbps and 19.2kbps (higher speeds are not allowed due to the board Opto-Insulators)
UART OFFLINE CABLE : 9.6kbps, 19.2kbps, 38.4kbps and 57.6kbps.
Parity and Stop bits
The parity and the stop bits can be chosen by modifying the Holding Register 48 and the possible choices are:
0 No parity, 2 Stop Bits (default)
1 Odd parity, 1 Stop Bit
2 Even parity, 1 Stop Bit
Supported Function:
03 Read Holding Registers
04 Read Input Registers
06 Write Single Holding Register
Modbus Communication Timeout
With this feature it is possible to stop the fan when the communication is lost, after a period of time set in the Holding Register
56 . The register can be set to:
The three-phase drivers can be connected in master & slave mode more easily. The three-phase drivers have a tachometric output
ranging from 0 to 10 V.
The master can have any possible configuration, while the slave must be configured in Analog Speed Control only.
The MASTER must have the Holding Register 46 set at 0 = TACHO.
15.2 Master and Slave 0-10V PWM out (for other drivers)
With three-phase drivers connected in a master & slave arrangement, DO NOT set the slave driver in Master&Slave mode:
if the slave is set in Master&Slave mode, it runs at twice the speed of the master.
The value of the Holding Registers is NOT coerced if trying to set a not allowed value.
When trying to enter a value in any holding register, the value is not overwritten if the new value is outside the load boundaries.