Related Manuals for Nicotra Gebhardt PFP
Summary of Contents for Nicotra Gebhardt PFP
- Page 1 EC FAN PFP 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. 0 - 05/11/2020...
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Page 2: Table Of Contents
9.5 Accessory installation ...............................15 9.5.1 Inlet protection guard kit ............................15 9.6 Electrical connections ...............................16 9.6.1 Optionals ..................................18 9.6.2 Power supply ................................19 9.6.3 Control board connection ............................20 9.6.4 Connection details ..............................21 9.6.4.1 Analog ................................21 9.6.4.2 Modbus communication ..........................23 9.6.4.3 Enable signal ..............................24 9.6.4.4 Pressure and flow meter..........................24 9.6.4.5 +24 AUX power supply (for PFP 3-Ph only) ....................25 9.6.4.6 Relay (for PFP 3-Ph only) ..........................25 9.6.4.7 Tachometric, alarm and filter output ......................26 9.6.4.8 Input Impedances ............................26 OPERATING MODES AND SETTING OPTIONS ........................27 2/48 Rev. 0 - 05/11/2020... - Page 3 OPERATING MANUAL OPERATING MANUAL 10.1 Speed control ..................................27 10.1.1 Analog speed control .............................27 10.1.2 Modbus temporary speed control .........................27 10.1.3 Modbus fixed speed control ..........................28 10.1.4 Speed control curves: examples ..........................28 10.2 Constant airflow ................................28 10.3 Asynchronous emulation ..............................28 10.4 PID closed control loop ..............................29 10.4.1 Analog ref. PID closed control loop ........................29 10.4.2 Modbus temporary ref. PID closed control loop ....................29 10.4.3 Modbus fixed ref. PID closed control loop ......................29 10.4.4 Modbus positive/negative feedback ........................30 10.5 Changing the operation mode ............................30 VOLUMETER MEASUREMENT SYSTEM FOR VOLUME FLOW RATE ..................31 11.1 General description of the system ..........................31 11.2 How to calculate volume flow rate from pressure probe ....................32 OTHER FEATURES ..................................33 12.1 Filter alarm ..................................33...
- Page 4 OPERATING MANUAL OPERATING MANUAL 18.1 Temporary holding register .............................38 18.2 Fixed holding register ..............................38 18.3 Holding register description ............................39 18.4 Input register description ...............................44 18.5 Fan info and Modbus registers ............................45 ALARM HANDLING ................................46 19.1 Monitoring..................................46 19.2 Modbus registers - Alarm description ..........................46 19.3 Blinking LED - Alarm description ............................46 19.4 Digital alarm output ...............................47 19.5 Alarm reset ..................................47 AVAILABLE SOFTWARE .................................47 4/48 Rev.
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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 PFP 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) fol- lowed 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 PFP 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
On receiving the fan, make sure the supply corresponds to what has been ordered. In case of non-compliance immediately inform the manufacturer. Also make sure the PFP fan has not been damaged during transport. 1.7 Safe operating area The drivers are protected against overload conditions and a safe operating area is defined by a limit of speed, output power and motor current. -
Page 8: Regulatory References
Single-phase drive systems: PFP 1.35 kW The drivers of these products incorporate an Active Power Factor Control module, to provide harmonics filtering and compliance with the EMC requirements applicable to domestic and equivalent environments (“first environment”), or with the advanced re- quirements 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. Three-phase drive systems: PFP 2.6 kW, 4 kW The drivers of these products are provided with basic EMI filters only. They are suitable for use in the “first environment”, under condition that they are incorporated into an apparatus, system or instal- lation, which is neither a plug-in device nor a movable device. Such devices shall have to be installed and commissioned only by a professional. More specifically: they comply with the requirements set in EN 61000-6-4 – Electromagnetic compatibility (EMC). Part 6-4: Generic standards - Emission standard for industrial environments which this product is incorporated must comply with the EMC Directive 2004/108/EC. -
Page 9: Data Plate
OPERATING MANUAL OPERATING MANUAL The compliancy to the standards are intended for a single fan. No tests have been made on multiple installations. WARNING WARNING The EMC tests are conducted without 485 communication wire, analog signals or Bluetooth devices. 3. DATA PLATE The manufacturer’s identification plate is located on the fan. -
Page 10: Transport And Storage
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. 5. PACKING CONTENTS The fan is delivered in a cardboard box inside which there are the installation instructions and the options required by the Customer at time of order. All these options will be mounted directly by the Manufacturer. Apart from the "options", the Customer can order "accessories" afterwards. In this case, the Customer will have to install them by him/herself. The following data are printed on the packing itself: 6xxxxxxxxxxxxxxx pfp xxxxxx xx xxx xxxx xxx 123456 REF. DESCRIPTION ART. CODE MODEL DESCRIPTION BATCH CODE 10/48 Rev. 0 - 05/11/2020... -
Page 11: Unpacking
WARNING WARNING Check the fan. Before installing the PFP fan, check to ensure that all of the items listed are present and that there are no visible signs of damage. Dispose of all packing components in compliance with the laws in force in the country of use. -
Page 12: Product Description
OPERATING MANUAL OPERATING MANUAL 7. PRODUCT DESCRIPTION The PFP 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 fully integrated into the motor and it is 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 series PFP 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 +/-10% (50/60Hz) • Sinusoidal Sensorless control • Integrated active Power Factor Controller • Simple cable connection with cage clamps • Integrated Modbus RTU interface • Integrated analogue interface 0-10V • Tachometric output available Performance • Internal PID available • Soft start... -
Page 13: Technical Features
OPERATING MANUAL OPERATING MANUAL 8. TECHNICAL FEATURES Driver Abs. curr. Abs. pow. Min. temp. Max. temp. IP class Size Motor code Driver code phases (°C) (°C) protection 1416F0 1431F2 1 Ph 5.72 1363 -20°C +40°C IP 54 1416F8 1431F3 3 Ph 2.07 1320 -20°C... -
Page 14: Installation
U, V, W 9.2 Operation WARNING WARNING The driver must NOT be removed from the related PFP fan type and size. The driver cannot be used separate from the related fan. WARNING WARNING Ensure correct grounding connections. The ground cable must be enough to carry the maximum supply fault current which nor- mally will be limited by the fuses or MCB. -
Page 15: Accessory Installation
OPERATING MANUAL OPERATING MANUAL 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 Inlet protection guard kit Materials 235 JR steel according to UNI EN 10025 Surface: Fe/Zn 8 according to UNI EN ISO 2081 Assembly In order not to lose the alignment, proceed as follows: • overlap the protection guard; • unscrew and screw bolts (1) and eyelets (2) to holes (3) one at a time. Sizes 280 - 630 Size Code R7220A 298.4 R7221A 342.4 R7222A 377.4 R7223A 417.4 R7224A 463.4 R7225A 513.4 R7226A 563.4... -
Page 16: Electrical Connections
OPERATING MANUAL OPERATING MANUAL 9.6 Electrical connections PFP 1.35kW 1-Phase BROWN GREY BLACK Y/GREEN +24V +10V ENABLE ANALOG INPUT TRANSDUCER INPUT MODBUS - A MODBUS - B TACHO/ALARM/FILTER PFP 2.6kW 3-Phase GREY BROWN BLACK Y/GREEN +24V +10V ENABLE ANALOG INPUT... - Page 17 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 personal injury or serious...
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Page 18: Optionals
OPERATING MANUAL OPERATING MANUAL 9.6.1 Optionals The drivers can be optionally connected by means of the following flush-type connectors: Phoenix Contact SACC-E-M12FS-8CON-PG9/0,5 (1) or compatible and Phoenix Contact SACC-E-M12MSS-3P-M16/0,5 PE or • compatible for 1-phase drivers (2); • Phoenix Contact SACC-E-M12FS-8CON-PG9/0,5 (1) or compatible and Phoenix Contact SACC-E-M12MSS-4CON-M16/0,5 PE or compatible for 3-phase drivers (2). Tacho/Alrm/Filter Tacho/Alrm/Filter Tacho/Alrm/Filter Grey Modbus - B 1-phase drivers Grey Brown Grey Modbus - B... -
Page 19: Power Supply
OPERATING MANUAL OPERATING MANUAL 9.6.2 Power supply The end user must connect the power supply cable and the command signal to the control board, while the motor connection is already done by Nicotra Gebhardt. As concerns the cable minimum section, check the requirements issued by the country of installation. PFP 1.35kW 1-Phase Single Phase 220/240V ±10% @ 50/60Hz The performance in the range [200V-264V] @ 50Hz/60Hz is always the same due to the PFC module inside the driver. Min. and max. wire section: Spring-loaded push-in clamp, suitable for • 0.2 mm² - 24 AWG up to 2.5 mm² - 12 AWG (stranded) or 4 mm² (solid) wire Use a bladed screwdriver, 0.6x3.5 mm max, to unlock. -
Page 20: Control Board Connection
OPERATING MANUAL OPERATING MANUAL 9.6.3 Control board connection PFP 1.35kW 1-Phase 1 +24V 2 +10V 3 ENABLE 4 ANALOG INPUT 5 TRANSDUCER INPUT 6 GND 7 MODBUS - A 8 MODBUS - B 9 GND 10 TACHO/ALARM/FILTER 1 +24V PFP 2.65kW 3-Phase... -
Page 21: 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. 9.6.4 Connection details In this paragraph are explained the feature and the possible connection of the control board. - Page 22 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 22/48 Rev. 0 - 05/11/2020...
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Page 23: Modbus Communication
OPERATING MANUAL OPERATING MANUAL 9.6.4.2 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 23/48 Rev. 0 - 05/11/2020... -
Page 24: Enable Signal
If it is not necessary turning on/off the fan with an external switch, a jumper can be inserted between clamps +24V and ENABLE. In case this jumper is not included, the fan will not start. For further details, refer to par. 14.3. 9.6.4.4 Pressure and flow meter To provide a constant airflow, the PFP fan is provided with the volumeter pressure probes, which are then connected to transducer K43198 by means of K409A2 piping. This transducer is connected to the PID regulator incorpo- rated into the driver, which is installed on the fan. For a correct installation, follow the instructions supplied with the single components. -
Page 25: Aux Power Supply (For Pfp 3-Ph Only)
OPERATING MANUAL OPERATING MANUAL If the transducer has its own PID control, the signal must be connected to the standard ANALOG INPUT. For details concerning the Volumeter measurement system for the volume flow rate, please refer to paragraph 11. 9.6.4.5 +24V AUX Power supply (for PFP 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). Use an available ground pin on the board for powering devices. 9.6.4.6 Relay (for PFP 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. -
Page 26: Tachometric, Alarm And Filter Output
0 whenever the required speed is lower than Speed Real unless the fan is in the dragging phase. The same analogue output channel can be reconfigured, by changing the value in Holding Register 46 (see paragraph 18.3 at page 41), as a Digital Alarm Output (refer to chapter 19 and paragraph 19.4), or in one of the alternative alarm modes described in paragraphs 12.1 and 12.2. 9.6.4.8 Input Impedances Input Impedances Feature available on ANALOG INPUT 20 kΩ PFP 1.35 kW 1-Phase ENABLE PFP 2.65 kW 3-Phase ANALOG INPUT 200 kΩ PFP 4 kW 3-Phase TRANSDUCER INPUT 26/48 Rev. 0 - 05/11/2020... -
Page 27: Operating Modes And Setting Options
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 Asynchronous Emulation Analog Signal Fixed Modbus Control (Permanent setting) WARNING WARNING The operating mode “Constant Airflow”... - Page 28 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 29 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 TRANS- DUCER 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 procedure 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 (INPUT TYPE = 10) In this mode the PID reference is given by the analog signal present at the ANALOG INPUT that can be monitored through the Input Register 29.
- Page 30 OPERATING MANUAL OPERATING MANUAL 10.4.4 Modbus positive/negative feedback Depending on the application it could be necessary to invert the feedback behavior. Through the Holding Register 31 it is possible to multiply The probe voltage by -1 the PID error. increases When the register is set to 0 -> Error = (R eference easure When the register is set to 1 -> Error = (M easure eference The probe voltage decreases Increasing the fan speed 10.5 Changing the operation mode Here are shown the actions passing from one operation mode to another one. ACTION ACTIONS A ACTIONS B Temporary Setting The fan must follow the target corresponding to the value...
- Page 31 OPERATING MANUAL OPERATING MANUAL 11. VOLUMETER MEASUREMENT SYSTEM FOR VOLUME FLOW RATE 11.1 General description of the system The Volumeter system is a measurement device for the volume flow rate of an operating fan. A correct and easy measurement of the fan volume flow can satisfy a variety of requirements, from acceptance testing of a new plant, at start-up time, to the automatic control of complex systems. The Volumeter system differs from other measurement devices, like Wilson grids and Venturi-meters, because it does not need a long, regular-section piece of straight duct. It can be easily integrated in the structure of a standard A.H.U. without special modifications. A complete Volumeter system is made of two parts: → 1) A modified fan, with special pressure probes located on each inlet nozzle. 2) A Pressure Transducer code K43198, located close to the fan and connected with pipes to the fan and with an electrical cable to a dedicated display (as shown in the following scheme). The Volumeter device is based on the Venturi principle, sensing the suction which is produced, in the throat section of the fan inlet nozzle or bell-mouth, by the airflow entering the fan. The achievable precision from a complete and appropriately calibrated system (+/-5%) corresponds to the level of precision normally required for industrial measurements on a running plant. The characteristic architecture of the Volumeter system allows the use of those components only needed by the specific application, limiting the cost of the equipment when the design requirements are simpler. The three components described above may be used or not, according to the functionalities required from each measurement system. 31/48 Rev. 0 - 05/11/2020...
- Page 32 OPERATING MANUAL OPERATING MANUAL 11.2 How to calculate volume flow rate from pressure probe The following analytical equations show how to calculate the value of the volume flow rate from the value of the probe pressure ∆p and vice versa. Values of ∆p are given in Pa, while values of flow rate Q are expressed in m³/h. Analytical expression to determine flow rate values from the pressure values, which can be read on the pressure-probe transducer: where: Q = volume flow rate [m³/h] ∆p = pressure value, read on the manometer [Pa] ρ = air density [kg·m-3] (1.2 at 20°C, 50% r.h. and 1013.2 hPa) C = dimensional constant, from the following table on this page. Analytical expression to predict pressure probe manometer readings from the corresponding flow rate values: where: Q = volume flow rate [m³/h] ∆p = pressure value, read on the manometer [Pa] ρ = air density [kg·m-3] (1.2 at 20°C, 50% r.h. and 1013.2 hPa) C = dimensional constant, from the following table on this page. The K value to be inserted inside the device is: As you can see, if the measurement is taken at standard air density, the square root assumes a unit value and K = C. The Probe Calibration Constant C has different values, according to the fan typeand size, as shown in the following table: PFP_280 PFP_500 PFP_315 PFP_560 PFP_355 PFP_630 PFP_400 PFP_710 PFP_450 PFP_800...
- Page 33 OPERATING MANUAL OPERATING MANUAL 12. OTHER FEATURES 12.1 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 Emu- lation 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). 12.2 Out of functioning range alarm This feature is not available for PFPs. 12.3 Flying start (for 3-phase only) The algorithm can catch the position of the rotor after changing the target speed to 0 and to a new value in short time. If too long time passed and the fan runs at very low speed, it is not possible to catch the speed: the fan brakes and restarts. 12.4 Regeneration (for 3-phase only) The algorithm can catch the position of the rotor after powering OFF and then ON the fan. If too long time passed and the fan runs at very low speed it is not possible to catch the speed and the fan brakes and restarts.
- Page 34 OPERATING MANUAL OPERATING MANUAL 12.6 Soft start In the following paragraph the starting phase of a fan is shown. • The first phase when the fan receives a command to start running is the ALIGNMENT. During this phase the driver aligns the rotor. • The second phase is the dragging phase, where the fan gradually increases its speed to the minimum in open loop. In this phase the current and speed values present in the Input Register can’t be taken in consideration. • The last phase is the closed loop where the sensorless control is active and from the minimum speed to the target speed the fan accelerates with different ramps basing on the fan size and the wheel inertia. The acceleration and deceleration values are different and to avoid overvoltage alarm or loss of synchronism alarm, the deceleration is always lower. During the ALIGNMENT and DRAGGING phases a Loss of Synchronism alarm could occur if there is a condition of wrong rotor starting position or wrong position estimation during the open loop phase. This is not a blocking alarm; therefore the fan stops and auto-restarts after few seconds.
- Page 35 OPERATING MANUAL OPERATING MANUAL 13.4 Input current limitation (for 1-phase only) Only the PFP single Phase has an input current limit of 5.9A. At 230V the driver can supply a power output of 1350W. Decreasing the input voltage, a derating occurs both for input and output current: During the functioning it is possible to monitor the input current by reading the Input Register 32. 14. OTHER VARIABLES There are other variables that can be monitored for a safe use of the fan. 14.1 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. 14.2 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. 14.3 Enable Function 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.
- Page 36 OPERATING MANUAL OPERATING MANUAL 15.2 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 37 OPERATING MANUAL OPERATING MANUAL 17. 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. 18. COMMUNICATION When trying to enter a value in any holding register, the value is not overwritten if the new value is outside the load boundaries. The value of the Holding Registers is NOT coerced if trying to set a not allowed value. 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)
- Page 38 OPERATING MANUAL OPERATING MANUAL 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 1.35kW 2.65kW Baud rate 9600 9600 9600 Parity and Stop Bits Modbus Address UART (OFFLINE) Default Communication Parameters 1-Phase 3-Phase 1.35kW 2.65kW Baud rate 9600...
- Page 39 OPERATING MANUAL OPERATING MANUAL Reset Tacho\Alarm\Filter Min Speed Modbus Baud rate Max Speed Modbus Parity and Stop Bits Max Current External PID Setting Fixed Speed Setting PID Kp PID positive/negative PID Ki Avoid Range Start PID Kd Avoid Range End PID Time Input Type Speed Threshold...
- Page 40 OPERATING MANUAL OPERATING MANUAL 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 1.35kW 1-Phase 3350 2890 2500 2000 1425 2.65kW 3-Phase 3350 2890 2680 2480 1950 3-Phase 2030 1900 1620 1230 Holding Register 7: Max Current [mA] This register can be used to reduce the max motor current.
- Page 41 OPERATING MANUAL OPERATING MANUAL Holding Register 33: Avoid Range End [RPM] This register combined with the Avoid Range Start can be used to skip some resonance frequencies of the fan. Allowed values = [Avoid Range Start, 20000] Default value = 20000 Holding Register 34: Input Type [Adim] This register defines all the possible operating modes: Allowed values = [0,12] Default value = 1 Modbus Speed Control The speed is set by modifying the register 66 Analog Speed Control The speed is set through the analog signal Modbus Fixed Speed Control The speed is set by modifying the register 21 Master&Slave The fan is configured as slave and follows the master Analog Constant Airflow The constant airflow is set through the analog signal...
- Page 42 OPERATING MANUAL OPERATING MANUAL The possible settings are: Tachometric The digital output indicates the measured speed through a PWM signal Alarm The digital output indicates when an alarm occurs Threshold The digital output indicates when the speed set in the Holding Register 55 is overtaken Out of Functioning Range The digital output indicates when the fan is working in a defined range of speeds Holding Register 47: Modbus Speed [10 kbps] −1 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 opto-insulated terminal block) corresponding to 57.6kbps (not available using the opto-insulated terminal block) Holding Register 48: Modbus Stop Bits [Adim] (Default = 0) This register can be used to set the parity and the stop bits.
- Page 43 OPERATING MANUAL OPERATING MANUAL 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 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 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 overtakes the threshold value.
- Page 44 OPERATING MANUAL OPERATING MANUAL 18.4 Input register description The Modbus Input Registers are in total 33, but only 14 are useful for the end user. Speed Reference [rpm] Module Temperature °C] Measured Speed [rpm] Alarm 2 [Adim] Bus Voltage Enable Input [10/2 Alarm 1 [Adim] Analog Input [10/2 Motor Current [mA] Transducer Input [10/2 Motor Voltage Measured Power Analog Input 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.
- Page 45 OPERATING MANUAL OPERATING MANUAL Input Register 30: Transducer Input [Adim] This input indicates the Transducer Value. The value must be multiplied by 10V/2 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. 18.5 Fan info and Modbus registers The Holding Register 44 indicates the fan model. 1.35kW 1-Phase 2.65kW 3-Phase 3-Phase...
- Page 46 OPERATING MANUAL OPERATING MANUAL 19. ALARM HANDLING When a malfunctioning occurs, the driver has two possible behaviors depending on the cause of the alarm: The cause of the alarm is very dangerous -> The driver stops immediately. To restart the fan, once the BLOCKING problem has been corrected, it is necessary to reset the fan or power the driver off for 5 minutes. The cause of the alarm is contingent to a wrong setting or wrong working condition. The alarm indica- AUTO-RESTARTING tions are activated, but after some seconds the fan tries to restart automatically. 19.1 Monitoring The alarms can be monitored through three different ways: • Modbus Registers • Blinking LED • Digital Output 19.2 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. Alarm 1 Alarm 2 Description Actions...
- Page 47 OPERATING MANUAL OPERATING MANUAL 19.4 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). 19.5 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. 20.
- Page 48 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 48/48 Rev. 0 - 05/11/2020...