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Nicotra Gebhardt EC FAN RDP Operating Manual

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EC FAN RDP
OPERATING MANUAL
Regal Beloit Italy S.p.A.
Via Modena, 18
24040 Ciserano (BG) ITALY
Phone +39 035 873 111
Fax +39 035 884 319
www.regalbeloit.com
Rev. 1 - 05/10/2021

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Summary of Contents for Nicotra Gebhardt EC FAN RDP

  • Page 1 EC FAN RDP OPERATING MANUAL Regal Beloit Italy S.p.A. Via Modena, 18 24040 Ciserano (BG) ITALY Phone +39 035 873 111 Fax +39 035 884 319 www.regalbeloit.com Rev. 1 - 05/10/2021...

  • Page 2: Table Of Contents

    OPERATING MANUAL OPERATING MANUAL INDEX INDEX DEFINITIONS AND WARNINGS ......................5 1.1 Object of this manual ........................5 1.2 Symbols used............................. 5 1.3 Qualified personnel ........................... 5 1.4 Use for intended purpose only ......................5 1.5 Safety instructions ..........................6 1.6 Informative letter ..........................7 1.7 Safe operating area ........................... 7 REGULATORY REFERENCES ........................8 2.1 Mechanical and electrical safety .......................
  • Page 3 OPERATING MANUAL OPERATING MANUAL 9.6.3.5 +24 AUX power supply (for RDP 2.65kW - 5.5 kW 3-Ph only) ........30 9.6.3.6 +12 AUX power supply (for RDP 2.1kW - 1-Ph only) ............. 30 9.6.3.7 Relay (for RDP 2.65kW - 5.5 kW 3-Ph only) ..............31 9.6.3.8 Tachometric, alarm and filter output ................31 9.6.3.9 Input Impedances ......................31 OPERATING MODES AND SETTING OPTIONS ..................32 10.1 Speed control ..........................32 10.1.1 Analog speed control ......................32 10.1.2 Modbus temporary speed control ..................32 10.1.3 Modbus fixed speed control ....................33 10.1.4 Speed control curves: examples .................... 33 10.2 Constant airflow ..........................
  • Page 4 OPERATING MANUAL OPERATING MANUAL 15. MASTER & SLAVE MODE ........................41 15.1 Master and Slave 0-5V PWM out (for 1.05 kW - 1-phase only) ............. 41 15.2 Master and Slave 0-10V PWM out (for other drivers) ..............41 VARIABLE SWITCHING FREQUENCY (for 3-phase - 5.5 kW only) ............42 COMMUNICATION ..........................42 17.1 Temporary holding register ......................43 17.2 Fixed holding register ........................43 17.3 Holding register description ......................44 17.3.1 Holding register 0 ....................... 44 17.3.2 Holding register 1 ....................... 44 17.3.3 Holding register 2 ....................... 45 17.3.4 Holding register 7 .......................

  • Page 5: Definitions And Warnings

    OPERATING MANUAL OPERATING MANUAL 1. DEFINITIONS AND WARNINGS 1.1 Object of this manual The aim of this manual is giving instrutions concerning installation, use and maintenance of RDP fans. This manual refers to fans having a driver with a 5 firmware revision or higher. 1.2 Symbols used As to the "WARNING" and "CAUTION" messages, the safety message is a symbol (a triangle containing an exclamation mark) followed by the text indicating the risk level. Its purpose is to warn the user of the potential personal damage that may result from an incorrect use of the machine or from the non-compliance with the use and maintenance instructions.

  • Page 6: Safety Instructions

    This manual is an integral part of the EC Fan RDP and it must be carefully read before using it since it gives important indications with regards to its safe installation, use and maintenance. Keep it with care.

  • Page 7: Informative Letter

    The content of this guide can be modified without prior notice. Great care has been taken in collecting and checking the documentation contained in this manual to make it as complete and comprehensible as possible. Nothing contained in this manual can be considered as a warranty, either expressed or implied - including, not in a restrictive way, the suitability warranty for any special purpose. Nothing contained in this manual can be interpreted as a modification or confirmation of the terms of any purchase contract. Nicotra Gebhardt products have not been conceived to work in areas at risk of explosions. In case of damage or malfunction, the DDMP fans must not be used until the Customer Care Technical Service has repaired it. Customer Care Technical Service For information concerning the nearest supporting center, please get in touch with your retailer. WARNING WARNING The original configuration of the fan must not be changed at all, except as prescribed in this manual.

  • Page 8: Regulatory References

    Electrical safety is generally achieved by application of the provisions of the EN 60204-1 standard “Electrical equipment of machines - General requirements”. Such safety requirements are covered as far as necessary for a partly complete machine, sub-assembly or component, as these fans are specifically intended for incorporation within other machines. The responsibility for the mechanical and electrical safety of the installed fan is thus of the manufacturer of the complete machine and, for this reason, it is strictly forbidden to put the fan in operation before the man- ufacturer of the machine has assessed and declared that the complete machine fulfils all the essential safety requirements set forth by the MD. Please, check the Declaration of Incorporation which accompanies each product, or ask your Nicotra Gebhardt sales representative, for additional information. 2.2 Electro-Magnetic Compatibility (EMC) Single-phase drive systems: RDP 1 kW, RDP 2 kW The drivers of these products incorporate an Active Power Factor Control module, to provide harmonics filter- ing and compliance with the EMC requirements applicable to domestic and equivalent environments (“first environment”), or with the advanced requirements for harmonic distortion which often apply to data centers. More specifically: they comply with the requirements set in: EN 61000-6-3 – Electromagnetic compatibility (EMC). Part 6-3: Generic standards. Emission standard for residential, commercial and light-industrial environments.

  • Page 9: Surge Protection

    OPERATING MANUAL OPERATING MANUAL Specific electrical safety and EMC standards are applied according to the available models of conformity declaration (identified as 985732 and 985748): EMC standards 61000-6-3 61000-6-4 (household) (industrial) Electrical 60204 safety 985732 985748 (machines) standards To improve the Electromagnetic compatibility a ferrite should be put on the power supply cable (close to the driver).

  • Page 10: Data Plate

    OPERATING MANUAL OPERATING MANUAL 3. DATA PLATE The manufacturer’s identification plate is located on the fan. Several safety warnings are applied to the fan; such warnings must be strictly followed by everyone dealing with this product. The company is not to be held responsible for damage to property or accidents to people which might occur if the above-mentioned warnings are not observed. In such a case, the operator is the only person responsible.

  • Page 11: Packing Contents

    OPERATING MANUAL OPERATING MANUAL CAUTION CAUTION If the fan must be subject to long-term storage, the storage time without application of any power supply shall not exceed two years since fan production or since operating the fan for at least half-an-hour continuously. The storage site shall have a temperature between -20°C and +70 °C, a Relative Humidity lower than 75%, and not be subject to condensation or exposed to dust.

  • Page 12: Product Description

    OPERATING MANUAL OPERATING MANUAL 7. PRODUCT DESCRIPTION The RDP is a backward curved blade fan equipped by an external permanent magnet rotor motor. The rotor magnets are made by rare earths (NdFeB) that strongly reduce the motor dimension and, therefore, the fan obstruction. The motor shape itself has been chosen for increasing the airflow inside the fan scroll. The Driver is compact and it is directly installed on board of the fan. The single-phase models are equipped with an active PFC (Power Factor > 0.95 in any state of operation) and it drives the motor through a sensorless algorithm. The Fans of the RDP series combine high energy efficiency and low noise level. Thanks to the “EC” (electronic commutation) motors, their electronics integrate speed control and protecting system. This reduces the number of different components required to provide these functions, compared to fans with traditional motors. The main feature of EC-motor is operating without slip losses, which allow consuming significantly less power than conventional AC motors. This occurs at all speed levels, especially with partial load operation. The EC complete drive system (i.e. the combination of the permanent-magnet motor with its electronic driver) has a much higher energy efficiency, in comparison with a drive system based on a conventional AC motor. Features • Supply voltage 220V-240V or 400V -3Ph+/-10% (50/60Hz) • Sinusoidal Sensorless control • Integrated active Power Factor Controller on Single-Phase units • Simple cable connection with cage clamps • Integrated Modbus RTU interface • Integrated analogue interface 0-10V • Tachometric output available Performance • Internal PID available • Soft start • Adjustable limits and operating mode • Self-protecting strategies implemented...

  • Page 13: Technical Data

    OPERATING MANUAL OPERATING MANUAL 8. TECHNICAL DATA Motor Driver Driver Max. abs. Max. abs. Min. Max. IP class Size code code phases curr. (A) pow. (W) temp. (°C) temp. (°C) protection 1416A8 1431C1 1 Ph 4.75 1119 -20°C +40°C IP 54 1416A8 1431E7 1 Ph...

  • Page 14: Dimensions

    OPERATING MANUAL OPERATING MANUAL 8.1 Dimensions The ten main dimensional parameters (A, B, C, D, E, F, G, H, I, and L) are illustrated in the scheme and the table below, according to the different sizes: RDP E0-0280 Dimensions in mm Motor Driver Size type type 1416A8 1431C1 523,7 360,7 302,1 470,5 57,7 362,6 73,5 493,8 1416A8 1431E7 523,7 360,7 302,1 470,5 57,7 362,6 103,4 523,7 1416C3 1431F0 523,7 360,7 302,1...

  • Page 15: Lg And Rd Versions

    OPERATING MANUAL OPERATING MANUAL 8.2 LG and RD versions In its standard configuration, the fan is delivered in LG version (counter-clockwise rotation). For accessibility needs, the fan can be required in RD version (clockwise rotation). Each version is supplied with different motor connections with the printed circuit board of the drivers. WARNING WARNING These connections are carried out by Nicotra Gebhardt and cannot be modified by the end user. LG version RD version 15/56 Rev. 1 - 05/10/2021...

  • Page 16: Installation

    OPERATING MANUAL OPERATING MANUAL 9. INSTALLATION The fan installation must be carried out only by competent and qualified staff. WARNING WARNING In the final installation, the device shall be directly connected to the supply terminals and shall have a con- tact separation in all poles, providing full disconnection under overvoltage category III conditions.

  • Page 17: Fan Installation

    OPERATING MANUAL OPERATING MANUAL 9.4 Fan installation Place the fan according to your needs, after having checked its dimensions and the position of the fixing holes. 9.5 Accessory installation As previously mentioned, all the required options are generally installed by the Manufacturer before delivery. The following describes the composition, the main features and the mounting procedure of each accessory that is ordered separately. 9.5.1 Outlet flanges Materials Galvanized steel accordirng to EN 10346 standard. Assembly The flange shall be assembled with the four edges external to the side plate. Size Code RE60005ZZ0000000 195,5 471,7 544,1 RE60006ZZ0000000 524,2 RE60007ZZ0000000 241,5 584,7 677,8 Size Code RE60008ZZ0000000 168,5 655,85 763,75 RE60009ZZ0000000 199,5 730,65 828,95 RE6000AZZ0000000...

  • Page 18: Outlet Flexible Connection

    OPERATING MANUAL OPERATING MANUAL 9.5.2 Outlet flexible connection Materials Flange in galvanized steel according to EN 10346 standard. Polyester / Neoprene fabric with galvanized metal strips 5/10. Assembly Couple and bolt the flexible connection to the fan flange using M8 screws "1". Size Code RG0405T 195,5 RG0406T RG0407T 241,5 Size Code RG0408T 168,5 RG0409T 199,5 RG04010T RG04011T 247,5 RG04012T 265,5 18/56 Rev. 1 - 05/10/2021...

  • Page 19: Mounting Feet Kit

    OPERATING MANUAL OPERATING MANUAL 9.5.3 Mounting feet kit Materials Galvanized steel accordirng to EN 10346 standard. Assembly Fix to the sides inserting the rubber vibration insulators "2" into the holes of the mounting feet "3". The mounting kit contains screws "4" and vibrations insula- tors. The mounting feet can be fixed so as to allow the fan to be installed with the scroll orientated to 0°, 90° e 270°. Size Code u x s 11x16 RE80005ZZ0000000 11x16 RE80007ZZ0000000 11x16 RE80008ZZ0000000 11x16 13x18 13x18 RE80009ZZ0000000 1037 13x18 1144 13x18 19/56 Rev. 1 - 05/10/2021...

  • Page 20: Side Frame Kit E2 / R

    OPERATING MANUAL OPERATING MANUAL 9.5.4 Side frame kit E2 / R Materials Galvanized steel to EN 10346 standard, 2 mm thickness. Assembly Applicable for fans type E0 (version without frame) to convert them into an E2 model with supporting frames. They are fixed using self-threading screws Ø6,3 up to size 250, screws Ø8 up to size 355. Fixing by M8 screws for size 400 and M10 screws from sizes 450 to 710. For fans from size 160 to 560 manufactured at Nicotra branches in India, Malaysia and China, please use side frames type ASH/RSH. Size Code u x s RE81005ZZ0000000...

  • Page 21: Inlet Protection Guard Kit

    OPERATING MANUAL OPERATING MANUAL 9.5.5 Inlet protection guard kit Materials 235 JR steel according to UNI EN 10025 Surface: Fe/Zn 8 according to UNI EN ISO 2081 Assembly Screw the two protection guards on both sides using the holes "5" made around the inlet cone. Size E0/L - E2/R R45046T R45047T R45048T R45049T R45050T R45051T R45052T Sizes 160 / 315 R45053T Each accessory consists of two protection guards. 9.5.6 Miscellaneous Code Description Dimension K43138 POTENTIOMETER 99200036 82 X 82 X 38 It can supply variable voltage (10 Vdc max).It is also possible to regulate minimum volt- age: it can be used to control voltage controlled electronic devices.
  • Page 22 OPERATING MANUAL OPERATING MANUAL Code Description 1401E7 CABLE GROUP + CONNECTOR L-500 - only for 1kW drivers (1431C1) • Cables can only be used with driver code 1431A5. • On request they can be supplied for the driver code 1431A8 and for the threephase versions. 22/56 Rev. 1 - 05/10/2021...

  • Page 23: Electrical Connections

    OPERATING MANUAL OPERATING MANUAL 9.6 Electrical connections RDP 1.05kW 1-Phase RDP 2.1kW 1-Phase RDP 2.65kW - 5.5kW 3-Phase CONNECTIONS MADE BY THE USER TACHO/ALARM/FILTER MODBUS - B MODBUS - A TRANSDUCER INPUT ANALOG INPUT ENABLE +10V +24V CONNECTIONS MADE BY Nicotra||Gebhardt YELLOW GREEN...

  • Page 24: Power Supply

    OPERATING MANUAL OPERATING MANUAL Make sure that a differential switch (circuit breaker) has been installed upstream the line and that it functions properly. Before carrying out any intervention on the electrical system, disconnect the power supply by means of main switch. WARNING WARNING Work on the driver/fan by unqualified personnel or failure to comply with warnings can result in severe...

  • Page 25: Control Board Connection

    OPERATING MANUAL OPERATING MANUAL 9.6.2 Control board connection RDP 1.05kW 1-Phase 1 GND 2 IN ANALOGUE 3 +10V SIGNAL IN 4 GND MODBUS RS485 TACHO 7 OUT RDP 2.1kW 1-Phase 1 GND 2 IN ANALOGUE 3 +10V SIGNAL IN 4 GND MODBUS RS485 TACHO...

  • Page 26: Connection Details

    OPERATING MANUAL OPERATING MANUAL WARNING WARNING Do not reverse the input signal or connect the +10V, 12V or +24V to signal ground. The driver could be damaged. Do not apply signals with voltage outside the indicated limits, the driver could be damaged. 9.6.3 Connection details In this paragraph are explained the feature and the possible connection of the control board.
  • Page 27 OPERATING MANUAL OPERATING MANUAL If two or more fans are installed in the same compartment and operated in parallel, the fans must start and stop at the same time. An auto-restarting alarm occurs when a fan is forced to run forward (or backward) rotation with a speed higher than 150 rpm. If an ext. 4-20mA device is used, it is necessary to add 0.1% precision resistances between the ANALOG INPUT and GND. The value of the resistance can range from: 125 Ω -> V ranges from 0.5V to 2.5V signal to 500 Ω -> V ranges from 2V to 10V signal 27/56...

  • Page 28: Modbus Communication

    OPERATING MANUAL OPERATING MANUAL 9.6.3.2 Modbus Communication A Modbus RTU protocol is available on all the fan models. The line must be connected to MODBUS-A, MODBUS-B and GND pins. There are two possible Modbus connections: 1) During the fan functioning through any RS-485 serial connection 2) With the driver powered off through an UART serial connection To connect the driver to a PC during the fan functioning, a USB to 485 converter can be used: K431F8. To connect OFFLINE the driver to a PC when the fan is powered off, a USB to UART converter can be used: K431A6 for 1-phase drivers and K431F7 for 3-phase drivers. A MOLEX connector "1" is used to connect the cable to the driver. 1-phase 3-phase Specifications and drivers can be downloaded from Nicotra Gebhardt website: https://www.nicotra-gebhardt.com 28/56 Rev. 1 - 05/10/2021...

  • Page 29: Enable Signal (For Rdp 2.65Kw - 5.5 Kw 3-Ph Only)

    OPERATING MANUAL OPERATING MANUAL 9.6.3.3 Enable Signal (for RDP 2.65kW - 5.5 kW 3-Ph only) The ENABLE signal allows the installation of the Start/Stop switch. The fan runs when the ENABLE input is con- nected to the +10V or +24V power supply. The status of the ENABLE input does not affect the Modbus Temporary modes. The voltage provided on the “Enable” input is constantly measured in all the driver operat- ing modes, and the value can be read in the Input Register 28. The voltage provided on the Enable input does not affect the four “Modbus - Temporary” modes, where the fan is intended to be completely controlled, including its starting and stopping, via its serial interface.
  • Page 30 OPERATING MANUAL OPERATING MANUAL An external transducer can be powered and connected to the driver. There are two possible connections depending on the kind of transducer used: 1) Open Control Loop Transducer 2) Closed Control Loop Transducer Nicotra Gebhardt can provide a Pressure Transducer code K43198. If the transducer does not have its own control and it supplies a voltage signal [0, +10V] proportional to the measured variable, it is possible to use the tunable PID of the driver. The signal must be connected to the TRANSDUCER INPUT. If the transducer has its own PID control, the signal must be connected to the standard ANALOG INPUT. 9.6.3.5 +24V AUX Power supply (for RDP 2.65kW - 5.5 kW 3-Ph only) The +24V output can supply a max current of 50mA and it is able to drive the Nicotra Gebhardt pressure transducer (code K43198).
  • Page 31 OPERATING MANUAL OPERATING MANUAL 9.6.3.7 Relay (for RDP 2.65kW - 5.5 kW 3-Ph only) A relay is available on the Three-Phase drivers. It is suitable for 250Vac/30Vdc 5A. When the driver is powered off the relay is open -> the PCB label indicates C-NO. During the functioning the relay is Normally Closed in No-Alarm condition and open in case of alarm.
  • Page 32 OPERATING MANUAL OPERATING MANUAL 10. OPERATING MODES AND SETTING OPTIONS Depending on the fan model, there are 4 possible Operating Modes and for each mode 3 possible Setting Options. Modbus Control Speed Control (Temporary setting) Constant PID Closed OPERATING Airflow Control SETTING MODES Sensorless Loop OPTIONS Asynchro- nous Emulation Analog Signal Fixed Modbus Control (Permanent setting) WARNING WARNING...
  • Page 33 OPERATING MANUAL OPERATING MANUAL 10.1.3 Modbus fixed speed control (INPUT TYPE = 2) Through this setting the fan runs at the speed defined by modifying the Holding Register 21. The setting is permanent and fan starts at the defined speed each time it is powered on. 10.1.4 Speed control curves: example 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). 3000 1400 2000 1200 1000 1000 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Flow rate [m 1000 2000...
  • Page 34 OPERATING MANUAL OPERATING MANUAL 10.4 PID closed control loop Through this setting the fan can work in a PID closed control loop where the measured process variable is connected to the TRANSDUCER INPUT that can be monitored through the Input Register 31. and it must be in the range of [0,10V]. The PID mode can be therefore used with temperature probes, pressure transducer, CO/CO2 detectors, etc. The parameters to set are: = Proportional Gain -> Holding Register 51 = Integral Gain -> Holding Register 52 = Derivative Gain -> Holding Register 53 - Time = T -> Holding Register 54 The following equations represent the simplified PID code: Chapter 5 of the technical Annex to this manual describes a practical procedure to calibrate the PID constants, to achieve stable operation of the closed-loop PID control system. As an alternative, the Nicotra Gebhardt Fan Configurator software for PC is also including an automatic pro- cedure to calibrate the PID controller. In many cases, this software function can save the user from a lengthy manual calibration procedure. For further information, refer to the Fan Configurator manual. 10.4.1 Analog ref. PID closed control loop (for 3-phase only) (INPUT TYPE = 10) In this mode the PID reference is given by the analog signal present at the ANALOG INPUT that can be moni- tored through the Input Register 29.
  • Page 35 OPERATING MANUAL OPERATING MANUAL 10.4.4 Modbus positive/negative feedback Depending on the application it could be nec- essary to invert the feedback behavior. Through the Holding Register 31 it is possible The probe voltage to multiply by -1 the PID error. increases When the register is set to 0 -> Error = (R eference The probe voltage easure decreases When the register is set to 1 -> Error = (M Increasing the fan speed easure eference 10.5 Changing the operation mode Here are shown the actions passing from one operation mode to another one. ACTION ACTIONS A ACTIONS B Fan is put in stop mode and after the data are saved the fan Temporary Setting...
  • Page 36 OPERATING MANUAL OPERATING MANUAL 11. OTHER FEATURES 11.1 Filter alarm This feature is useful when the speed of the fan is not directly set by the user as fans set in Constant Airflow Asynchronous Emulation or PID mode. The alarm is active when a speed threshold is overtaken (5V or 10V depending on the fan model). To activate this feature, the Holding Register 46 must be set at value 2 and the required Speed Threshold value must be set into the Holding Register 55. The digital output of the driver changes its status (see above figure). 11.2 Change of limits (for 5.5 kW drivers only) The Min Speed values set as default are higher than the possible values that can be introduced in this register. Two limitations are active for this register: Abolute minimum speed (Hardcoded) The absolute minimum value that can be set in this register is 10 rpm. Minimum Speed=2 x Min rpm stp (Holding Register 22 - not changeable by users) It is suggested to set values equals or higher than the minimum speed default setting. The accelera- tions and decelerations chosen values are also related to the behaviour of the fan at the minimum speed set.
  • Page 37 OPERATING MANUAL OPERATING MANUAL 11.6 Skip speed Range (not available for 1.05kW 1-phase) This feature allows to skip the resonance frequencies of the fan installation. To activate this feature the Holding Register 32 must be set at the desired Avoid Range Start and the Holding Register 33 the desired Avoid Range End. This function should be avoided when used in close control loops application or unstable conditions of the fan could occur. 11.7 Soft start In the following paragraph the starting phase of a fan is shown.
  • Page 38 OPERATING MANUAL OPERATING MANUAL 11.8 Starting in Closed-loop torque control (for 5.5 kW drivers only) Unlike the less powerful drivers, the 5.5 kW drivers start the motor under closed-loop torque control from 0 rpm upwards. If the rotor of the motor encounters some unexpected resistance to rotation, the driver increases gradually the current until the motor can start correctly. 11.9 Stop speed (for 5.5 kW drivers only) When the fan speed is set to 0 rpm and the value of “Stop Speed” is 0<Stop Speed<Max Speed, then the fan decelerates gradually down to the Stop Speed and then the fan is left coasting to stop. If the value of “Stop Speed” is Stop Speed>>Max Speed (default configuration) then the controlled deceleration is de-activated, and whenever the speed is reduced the fan is left coasting down to the required speed or to stand-still. If the value of “Stop Speed” is “0” and the set speed is also “0”, then the fan impeller is decelerated to stand- still and then kept braked. 38/56 Rev. 1 - 05/10/2021...
  • Page 39 OPERATING MANUAL OPERATING MANUAL 11.10 Locked rotor (for 5.5 kW drivers only) In case of completely locked rotor, the current injected could damage the motor if it lasts for long and if the alarm is repeated indefinitely. The Loss of Synchronism alarm is repeated for a number of times defined by the "Num Failures Sync" Holding Regioster 57 (not changeable by users). Once the max trials are reached, the alarm becomes blocking. If the fan can restart and can run for one minute before the max number is reached, the counter is reset. For further information about the Loss of Synchronism, see paragraph 18.2. 12. SAFE OPERATING AREA LIMITATIONS 12.1 Speed limitation The speed limits can be adjusted for the signal rescaling, but also to limit the noise in the final application. The Input Register 2 indicates the Speed Reference (minimum speed during alignment and dragging and the Set Speed in Closed Control Loop). The Input Register 3 indicates the Measured Speed. 12.2 Power limitation The driver is set by factory default to the max achievable electrical input power to the driver depending on the model. During the functioning it is possible to monitor the power absorption by reading the Input Register 31. If for some application it is necessary to keep the absorption of the fan below a defined power value, it is...
  • Page 40 OPERATING MANUAL OPERATING MANUAL 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 Input type Enable function Not active Active Active...
  • Page 41 OPERATING MANUAL OPERATING MANUAL 14.2 Motor overheating: THERMAL PROTECTOR The motor is protected through one or more Thermal Protectors. If the motor temperature is too high, the thermal protector opens one phase and the driver recognizes the error and stops the fan (see chapter 18). The Motor Winding temperature and the driver derating are dependent on the fan size and on the fan working point. Therefore, it is possible that the fan could work at 50°C without a performance limitation. WARNING WARNING The Driver and motor areas are rated for operating in a temperature range between -20°C and +40°C.
  • Page 42 OPERATING MANUAL OPERATING MANUAL 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. 16.
  • Page 43 OPERATING MANUAL OPERATING MANUAL When the timeout occurs, the driver goes in alarm condition and the communication must be restored and the alarm must be cleared. The alarm is indicated in the Input register 17 with the value of 255 (0xFF). Modbus Address The slave device address can be changed from value 1 to 247 by modifying the Holding Register 45. The default address from factory configuration is 1. Broadcast Address The Broadcast address is 0. RS-485 Default Communication Parameters 1-Phase 3-Phase 1.05kW 2.1kW 2.65kW 5.5kW Baud rate 9600 9600 9600 9600 Parity and Stop Bits Modbus Address UART (OFFLINE) Default Communication Parameters 1-Phase 3-Phase 1.05kW...
  • Page 44 OPERATING MANUAL OPERATING MANUAL Reset P. 44 45 Modbus Address P. 47 Min Speed P. 44 46 Tacho\Alarm\Filter P. 47 Max Speed P. 45 47 Modbus Baud rate P. 48 Max Current P. 45 48 Modbus Parity and Stop Bits P.
  • Page 45 OPERATING MANUAL OPERATING MANUAL 17.3.3 Holding Register 2 Holding Register 2: Max Speed [RPM] This register can be used to set the max speed of the fan. Allowed values = [Min Speed, Default Value] Default value = table below 1.05kW 1-Phase 2600 2200 1800 2.1kW 1-Phase 3200 2770 2080 1700 2.65kW 3-Phase 3700 3100 2500 2000 5.5kW 3-Phase 2860...
  • Page 46 OPERATING MANUAL OPERATING MANUAL 17.3.7 Holding Register 31 Holding Register 31: PID Positive/Negative [Adim] This register can be used to invert the feedback behavior of the PID. Allowed values = 0 and 1 Default value = 0 17.3.8 Holding Register 32 Holding Register 32: Avoid Range Start [RPM] This register combined with the Avoid Range End can be used to skip some resonance frequencies of the fan. Allowed values = [0, Avoid Range End] Default value = 20000 17.3.9 Holding Register 33 Holding Register 33: Avoid Range End [RPM]...
  • Page 47 OPERATING MANUAL OPERATING MANUAL 17.3.11 Holding Register 35 Holding Register 35: Stop Speed This register can be used to set the stop speed. When the fan speed is set to 0 rpm if the 0<Stop Speed<Max Speed, the fan decelerates gradually until the Stop Speed value is reached and then the fan is let in free run. Allowed values = [0, 20000] Default value = 20000 17.3.12 Holding Register 36 Holding Register 36: Maximum Power [W] This register can be set to reduce the power out to the motor. Allowed values = [10, Default Value] Default value = table below Value 1.05kW 1-Phase...
  • Page 48 OPERATING MANUAL OPERATING MANUAL 18.3.15 Holding Register 47 Holding Register 47: Modbus Speed [10−1 kbps] This register can be used to set the Modbus speed. Allowed values = table on the following page Default value = 96 corresponding to 9.6kbps corresponding to 19.2kbps corresponding to 38.4kbps (not available using the RS485 port) corresponding to 57.6kbps (not available using the RS485 port) 17.3.16 Holding Register 48 Holding Register 48: Modbus Stop Bits [Adim] (Default = 0) This register can be used to set the parity and the stop bits.
  • Page 49 OPERATING MANUAL OPERATING MANUAL 17.3.20 Holding Register 53 Holding Register 53: Kd [Adim] This register can be used to set the Derivative Gain of the PID control. Allowed values = [0, 32767] Default value = 0 17.3.21 Holding Register 54 Holding Register 54: Period [ms] This register can be used to set the time constant of the PID control. Allowed values = [0, 32767] Default value = 0 17.3.22 Holding Register 55 Holding Register 55: Speed Threshold (or Speed Threshold HIGH) [RPM] This register can be used to set the speed threshold, when the measured speed in the Input Register 3 over- takes the threshold value.
  • Page 50 OPERATING MANUAL OPERATING MANUAL 17.4 Input register description The Modbus Input Registers are in total 33, but only 14 are useful for the end user. 15 Module Temperature [10 Speed Reference [rpm] °C] Measured Speed [rpm] 17 Alarm 2 [Adim] [10/2 Bus Voltage 28 Enable Input [10/2 10 Alarm 1 29 Analog Input [Adim] [10/2 12 Motor Current 30 Transducer Input [mA] 13 Motor Voltage 31 Measured Power 14 Analog Input 32 Input Current [mA]...
  • Page 51 OPERATING MANUAL OPERATING MANUAL Input Register 30: Transducer Input [Adim] This input indicates the Transducer Value. The value must be multiplied by 10V/216 to have the corresponding voltage value. Input Register 31: Measured Power [W] This register indicates the absorbed power. Input Register 32: Input Current [mA] This input indicates the input absorbed current. 17.5 Fan info and Modbus registers The Holding Register 44 indicates the fan model.
  • Page 52 OPERATING MANUAL OPERATING MANUAL 18.2 Modbus registers - Alarm description In the following table, the alarms and the values stored in the related Modbus Input Register 10 and Input Register 17 are indicated. A l a r m Alarm 2 Description Actions Type Default operation – No Errors No Actions ALARM 1 Memory error Blocking condition ALARM 2 Short Circuit Blocking condition...
  • Page 53 OPERATING MANUAL OPERATING MANUAL 18.4 Digital Alarm Output The driver output can be configured as Alarm output by modifying the Holding Register 46 to value 1. During the normal functioning, the value is 0V and, when an alarm occurs, the output value is 5V (or 10V depending on the fan model). 5V/10V 18.5 Alarm Reset The alarms are automatically reset following the action of the table below: Operating Mode Input Type Action Analog 1, 4, 7, 10 Signal set to 0V Fixed 2, 6, 9, 12 Registers 21, 39, 30 and 50 set to 0 As conerns the Temporary Modbus mode, it is necessary to reset the fan by setting the Holding Register 0 to value=1 instead of setting to 0 the Register 66. Temporary 0, 5, 8, 11 Register 0 set to 1 The Holding Register 0 is a general reset and works also in the Analog mode and Fixed mode. 19.
  • Page 54 OPERATING MANUAL OPERATING MANUAL 20. AVAILABLE SOFTWARE A freeware software is available on Nicotra Gebhardt site (http://www.nicotra-gebhardt.com) for monitoring the fan. The software can be used for configuring the fan and monitoring the performance. Please refer to the related manual for more details. 54/56 Rev. 1 - 05/10/2021...
  • Page 55 OPERATING MANUAL OPERATING MANUAL NOTES 55/56 Rev. 1 - 05/10/2021...
  • Page 56 OPERATING MANUAL OPERATING MANUAL Regal Beloit Italy S.p.A. Via Modena, 18 24040 Ciserano (BG) ITALY Phone +39 035 873 111 Fax +39 035 884 319 www.regalbeloit.com 56/56 Rev. 1 - 05/10/2021...

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