Category: danfoss

I. Application Scenario and Function Analysis

The main functions of chemical metering pumps include:

• Precise Flow Control: Achieve quantitative delivery of chemicals by adjusting the pump’s rotational speed.
• Start/Stop Control: Ensure smooth start and stop of the pump to avoid pressure surges.
• Pressure/Flow Feedback Regulation: Adjust the pump speed in real-time based on sensor feedback.
• Fault Protection: Automatic shutdown in case of overload, over-temperature, under-load, etc.
• Remote Monitoring and Operation: Realize automated operation through fieldbus or external controllers.

The VACON 100 HVAC inverter is suitable for these requirements. It supports multiple control methods (digital input, analog input, fieldbus), has built-in HVAC application macros, fault diagnosis functions, and rich parameter settings, which can well meet the control requirements of chemical metering pumps.

Specific Functional Positions in the Application

• Main Drive Motor: Drives the metering pump and controls its rotational speed to regulate the flow rate.
• Auxiliary Motor (if any): Used for the cooling system or stirring device (depending on the process requirements).
  The following design focuses on a single main drive motor. If an auxiliary motor is required, it can be expanded according to similar logic.

II. Hardware Selection

1. Motor Selection
   • Type: Three-phase asynchronous motor (commonly used in metering pumps). The power is selected according to the pump’s load requirements, such as 0.75 kW or 1.5 kW.
   • Voltage: Match the inverter’s power supply voltage, such as 380 – 480 V (common industrial standard).
   • Protection Level: The chemical environment may be corrosive, so it is recommended to choose a motor with an IP55 or higher protection level.
2. Inverter Selection
   • Model: VACON 100 HVAC. The rated current should be greater than the motor’s full-load current (e.g., for a 1.5 kW motor with a current of about 3.5 A, choose a model with a rated current ≥ 4 A).
   • Power Supply: 380 – 480 V three-phase AC (refer to Section 7.1.2 of the installation manual).
3. External Devices
   • PLC: Select Siemens S7 – 1200 (such as 1214C) for logic control and data processing.
   • Touch Screen: Siemens HMI TP700 Comfort for parameter setting and running status display.
   • Sensors:
     • Flow Sensor: Outputs a 4 – 20 mA analog signal for flow feedback.
     • Pressure Sensor: Outputs a 4 – 20 mA analog signal for pressure monitoring.
   • Relay: 24 V DC for controlling the start/stop signals.

III. Wiring Scheme

Refer to Section 7.2.1 of the installation manual and relevant sections of the application manual for information on the control terminals of the VACON 100 HVAC inverter. The following is the wiring design for the chemical metering pump:

1. Power and Motor Wiring
   • Power Input: Connect to the L1, L2, L3 terminals of the inverter (three-phase 380 V).
   • Motor Output: Connect to the U, V, W terminals of the inverter and then to the three-phase motor.
   • Grounding: Connect the PE terminal of the inverter to the grounding terminal of the motor to ensure grounding complies with the EN61800 – 5 – 1 standard (refer to Section 1.3 of the installation manual).
2. Control Terminal Wiring
   Refer to the technical information of the standard I/O board in Section 7.2.1 of the installation manual:

Terminal	Function	Wiring Description
1	+10V Reference Voltage	Not used
2	AI1+ (Analog Input 1)	Connect to the flow sensor (positive pole of 4 – 20 mA output)
3	AI1- (Analog Input 1 Ground)	Connect to the flow sensor (negative pole of 4 – 20 mA output)
4	AI2+ (Analog Input 2)	Connect to the pressure sensor (positive pole of 4 – 20 mA output)
5	AI2- (Analog Input 2 Ground)	Connect to the pressure sensor (negative pole of 4 – 20 mA output)
6	24V Auxiliary Voltage	Supply power to relays or sensors (if needed)
7	GND	Control signal ground
8	DI1 (Digital Input 1)	Connect to the PLC output (start signal)
9	DI2 (Digital Input 2)	Connect to the PLC output (stop signal)
10	DI3 (Digital Input 3)	Connect to the external emergency stop button (normally closed contact)
11	CM (Common Terminal A)	Common ground for DI1 – DI3
12	24V Auxiliary Voltage	Not used
13	GND	Not used
18	AO1+ (Analog Output 1)	Connect to the PLC input (output frequency feedback, 0 – 10 V)
19	AO1- (Analog Output Ground)	Common ground for analog output
A	RS485 A	Connect to the RS485 A terminal of the PLC
B	RS485 B	Connect to the RS485 B terminal of the PLC

Wiring Diagram (Text Description)

• Power Input:
  • L1 —- [Inverter L1]
  • L2 —- [Inverter L2]
  • L3 —- [Inverter L3]
• Motor Output:
  • [Inverter U] —- [Motor U]
  • [Inverter V] —- [Motor V]
  • [Inverter W] —- [Motor W]
• Grounding:
  • [Inverter PE] —- [Motor PE] —- [Grounding Wire]
• Control Signals:
  • [PLC DO1] —- [DI1] (Start)
  • [PLC DO2] —- [DI2] (Stop)
  • [Emergency Stop Button] —- [DI3]
  • [Flow Sensor +] —- [AI1+]
  • [Flow Sensor -] —- [AI1-]
  • [Pressure Sensor +] —- [AI2+]
  • [Pressure Sensor -] —- [AI2-]
  • [AO1+] —- [PLC AI1] (Frequency Feedback)
  • [AO1-] —- [GND]
  • [A] —- [PLC RS485 A]
  • [B] —- [PLC RS485 B]

IV. Parameter Setting

The following parameter settings are based on the application manual and the requirements of the chemical metering pump. Use the start-up wizard and HVAC application macro of the VACON 100 for configuration.

1. Start-up Wizard Settings (Refer to Page 4 of the Application Manual)
   • Language: Select Chinese.
   • Time: Set the current time (e.g., 14:30:00).
   • Date: Set the current date (e.g., 15.10.2023).
   • Application Macro: Select the HVAC application macro.
2. Key Parameter Settings

Parameter Number	Parameter Name	Setting Value	Description
P1.1	Minimum Frequency	10 Hz	Ensure the minimum running speed of the pump
P1.2	Maximum Frequency	50 Hz	Match the rated frequency of the motor (typical value)
P3.1.1	Motor Rated Voltage	380 V	Set according to the motor nameplate
P3.1.2	Motor Rated Current	3.5 A	Set according to the motor nameplate
P3.3.1	Control Mode	1 (Frequency Control)	Use frequency control mode
P3.5.1.1	DI1 Function	1 (Start)	DI1 controls start
P3.5.1.2	DI2 Function	2 (Stop)	DI2 controls stop
P3.5.1.3	DI3 Function	6 (External Fault)	DI3 is used for emergency stop
P3.6.1	AI1 Signal Range	1 (4 – 20 mA)	Flow sensor input
P3.6.2	AI2 Signal Range	1 (4 – 20 mA)	Pressure sensor input
P3.7.1	AO1 Function	1 (Output Frequency)	Output frequency feedback to the PLC
P3.14.1	Overcurrent Protection	Enabled	Protect the motor and pump
P3.14.2	Overload Protection	Enabled	Prevent motor overload

3. PID Control Settings (Flow Regulation)
   • P3.9.1: Enable PID Control = 1
   • P3.9.2: Setpoint Source = 0 (Fixed value, input from the touch screen)
   • P3.9.3: Feedback Value Source = AI1 (Flow Sensor)
   • P3.9.4: Proportional Gain = 2.0 (Adjust according to actual debugging)
   • P3.9.5: Integral Time = 1.0 s (Adjust according to actual debugging)

V. Control System Design

1. System Architecture
   • PLC: Responsible for logic control, sensor signal processing, and communication with the inverter.
   • Touch Screen: Display running status (rotational speed, flow rate, pressure) and set the target flow rate.
   • Inverter: Execute motor rotational speed control, receive PLC instructions, and sensor feedback.
   • Sensors: Provide real-time flow rate and pressure data.
2. Control Logic
   • Start/Stop:
     • The PLC controls the inverter’s start/stop through DI1/DI2.
     • The emergency stop button triggers DI3, and the inverter stops immediately.
   • Flow Regulation:
     • The touch screen inputs the target flow rate value, and the PLC transmits it to the inverter via RS485.
     • The inverter adjusts the motor rotational speed through PID regulation based on the feedback from AI1 (flow sensor).
   • Pressure Monitoring:
     • AI2 (pressure sensor) monitors the pipeline pressure. If it exceeds the set range (e.g., > 5 bar), the PLC issues a stop command.
   • Fault Handling:
     • When the inverter detects a fault (e.g., overcurrent, fault code 1), it notifies the PLC via RS485, and the touch screen displays the fault information.

Control Schematic Diagram (Text Description)

• [Touch Screen] —- [RS485] —- [PLC]
  • | |
  • | |—- [DO1] —- [DI1] (Start)
  • | |—- [DO2] —- [DI2] (Stop)
  • | |—- [AI1] —- [AO1] (Frequency Feedback)
  • | |—- [RS485] —- [Inverter A/B]
• [Flow Sensor] —- [AI1+/-]
• [Pressure Sensor] —- [AI2+/-]
• [Emergency Stop Button] —- [DI3]
• [Inverter U/V/W] —- [Motor]

VI. Implementation Steps

1. Installation and Wiring:
   • Connect the power supply, motor, and control signals according to the wiring scheme.
   • Ensure reliable grounding to avoid electromagnetic interference.
2. Parameter Configuration:
   • Initialize using the start-up wizard on the inverter panel.
   • Input the above parameters and save the settings.
3. PLC and Touch Screen Programming:
   • Write the start/stop logic and PID control program for the PLC.
   • Design the touch screen interface, including flow rate setting, running status, and fault alarms.
4. Debugging:
   • Manually test the start/stop functions.
   • Adjust the PID parameters to ensure stable flow rate.
   • Simulate faults to verify the protection functions.
5. Operation and Optimization:
   • After long-term operation, fine-tune the parameters according to the actual working conditions.

VII. Precautions

• Safety: Do not touch the internal circuits of the inverter after it is powered on (refer to Section 1.2 of the installation manual).
• EMC: The chemical environment may have interference, so adjust the EMC jumpers (refer to Section 6.3 of the installation manual).
• Support: If you encounter any problems, you can contact us.

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I. Overall Concept

1. Application Points and Functions
   In a desiccant packaging machine, there are often multiple drive motors, such as a feeding motor, a sealing motor, a blower/fan motor, a conveyor motor, and so on. If you are focusing on the “desiccant-blowing” or “air-blowing” process, you can apply the HLP-C100 inverter in the following situations:
   • Blower/Fan Motor: By using the inverter to control air volume or blowing speed, you can flexibly adjust airflow according to packaging speed or desiccant characteristics.
   • Conveying/Feeding Motor (if necessary): You can achieve more precise control of the speed at which desiccant moves, preventing blockage or spillage.
   • Other Auxiliary Mechanisms (e.g., stirring, lifting, rotating, etc.): Based on your needs, you can also equip these with an inverter to implement multi-step speed or jog functionalities.
2. Control Method Selection
   • To allow flexible speed adjustment, operators may directly set the speed on the inverter’s front panel using the built-in knob (local control mode), or use an external analog signal (0–10V/4–20mA from a PLC or industrial PC) as a remote speed reference.
   • If the machine requires centralized automation control (e.g., unified operation from an HMI, production line linkage, recipe management), you can add a small PLC (e.g., Hailipu’s PLC, Mitsubishi FX series, Xinje, Delta, etc.) and an HMI (touch panel) to manage start/stop commands, frequency references, alarm display, and more.

Below, we address main circuit wiring, control circuit wiring, parameter settings, and how to select/connect a PLC/HMI.

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II. Main Circuit Wiring

1. Motor-to-Inverter Connection
   • Inverter Output Terminals: U, V, W → Connect to the three-phase terminals of the blower/fan motor (if you have a single-phase motor, this will not be suitable unless you use a model that supports single-phase output).
   • Inverter Input Terminals: R, S, T → Connect to the three-phase AC supply (for single-phase 220 V models, connect to R and T).
   • Ground Terminal PE: Must be reliably grounded to prevent leakage, interference, and induced voltages.
   Refer to the “3.3 Main Circuit Wiring Diagram” in the manual.
   For smaller motor power ratings (e.g., 0.75 kW to 1.5 kW), the HLP-C100 series is usually sufficient. Ensure that the motor’s rated power, voltage, and current match the inverter’s specifications, leaving some margin.
2. Peripheral Protection and Input-Side Components
   • Circuit Breaker (Air Switch): Selected based on the inverter’s rated input current (see “3.2.1 Air Switch, Fuse, Contactor Selection” in the manual) to cut power promptly under overcurrent or other serious faults.
   • AC Contactor (optional): Avoid using it too frequently for starting/stopping the inverter. Typically, it’s only used for maintenance or emergency power-off situations.
   • Input Reactor/EMI Filter (optional): If the site has harmonic issues or other sensitive equipment, consider adding an input reactor or EMI filter on the supply side to reduce higher-order harmonics and electromagnetic interference.
3. Brake Unit and Brake Resistor (optional)
   For a “blower” load, inertia is usually not large, and fast, frequent deceleration is rarely required, so you typically do not need an external brake unit/resistor. But if this inverter is used with higher-inertia loads or requires rapid stops (such as certain conveying or feeding mechanisms), you may consider using the built-in or external brake unit plus an appropriately sized brake resistor.
4. Main Circuit Diagram (Text Example) Power R ——┐ │ Power S ——┤—— [Circuit Breaker] —— [HLP-C100 Inverter] —— U —— Motor (UVW) │ V Power T ——┘ W Inverter PE ———— Ground (Earth) (The above example shows a three-phase 380 V connection; for single-phase, omit S and connect R/T to the live/neutral wires.)

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III. Control Circuit Wiring

Control circuit wiring determines how the inverter receives start/stop, direction, and frequency commands, and how it outputs fault and run signals. If you need to use a PLC or external buttons for control, refer to the following.

1. Digital Inputs (DI)
   • The HLP-C100 provides five digital input terminals (FOR, REV, DI1, DI2, DI3) configured as NPN by default (see “3.4 Control Circuit Wiring” in the manual).
   • Typically, FOR is set as the “forward run” command, REV as “reverse run” (if necessary), and the remaining DI1, DI2, DI3 can be set up for multi-step speed selection, emergency stop, reset, jog, etc.
   • For a blower needing only forward run and stop, you can place an external “START” button (normally open) and a “STOP” button (normally closed) to the respective terminals. For example:
     • FOR = Start (via a normally open button + 24 V power; pressing it gives a high-level signal to the inverter)
     • DI1 = Stop (via a normally closed button + 24 V; pressing it breaks the circuit, giving a low-level signal to stop)
     • Or you can assign “start-stop in one” to FOR (reverse logic).
2. Analog Input (VI)
   • If you want to adjust blower speed remotely using an external analog signal (0–10 V / 4–20 mA from a PLC or sensor), wire the signal to VI and GND on the inverter.
   • In the parameters (e.g., C03.15, etc.), select “Reference Source 1 = VI,” and calibrate the range in C06.10~C06.19 to match your actual voltage or current signal.
3. Relay Output (FA-FB-FC)
   • If you want a dry contact output from the inverter to indicate a fault or run status, set parameter C05.40 (Relay Output Function) to 9 (Fault), 5 (Running), etc. Then a PLC or external indicator can monitor the inverter state.
4. Control Circuit Diagram (Text Example) [+24V] —— Start Button (NO) ——> FOR terminal on inverter —— Stop Button (NC) ——> DI1 terminal on inverter GND ---------------------------------> Inverter GND Analog: PLC AO(0-10V) ——> VI PLC AGND ——> GND Relay Output: FA-FB-FC (FB is common, FA is NC, FC is NO) (If you are only using the inverter’s keypad for start/stop and knob for speed, you can omit the digital inputs or just keep a dedicated emergency stop.)

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IV. Key Parameter Settings (Example)

Suppose the motor is 0.75 kW, rated voltage 380 V, rated frequency 50 Hz, rated current 1.8 A (example). You want to control start/stop with external FOR and DI1, and 0–10 V analog for speed. Below are key configuration points (see the manual’s “Chapter 5–7: Function Parameter Table” and “Quick Application Guide” for details):

1. Motor Parameters (Group 01)
   • C01.20 = Motor Power = 0.75 (kW)
   • C01.22 = Motor Rated Voltage = 380 (V)
   • C01.23 = Motor Rated Frequency = 50.0 (Hz)
   • C01.24 = Motor Rated Current = 1.80 (A)
   • C01.25 = Motor Rated Speed = 1440 (rpm) (example)
2. Operating Mode
   • C01.00 = 0 (Open-loop speed)
3. Reference Frequency and Acc/Dec (Group 03)
   • C03.03 = 50.00 (Max Reference; set to 50 if you want up to 50 Hz, or higher if you want 60 Hz, etc.)
   • C03.15 = 1 (Reference Source 1 = “Terminal VI”)
   • C03.41 / C03.42 = 5.0 s / 5.0 s (Acceleration/Deceleration time; adjust as needed for the blower’s inertia)
4. Start/Stop & Direction Control (Group 05)
   • C05.10 (FOR Input Function) = 8 (“Start”)
   • C05.12 (DI1 Input Function) = 6 (“Stop, inverse logic”) or 46 (“Stop, normal logic”)
   • If reverse is not required, set C04.10 (Motor Run Direction) to 0 to allow only forward operation, preventing accidental reverse.
5. Analog Input (Group 06)
   • C06.19 = 0 (Indicates VI is a voltage input)
   • C06.10 = 0.00, C06.11 = 10.00 (0–10 V corresponds to 0–50 Hz)
   • If you need a zero deadband, set C06.18 accordingly; if the input fluctuates too much, increase C06.16 (filter time), etc.
6. Protections and Warnings
   • C04.58 = 0 (Motor phase-loss detection; set to 1 if you need it)
   • C14.01 = 5 (Carrier frequency, typically 4–6 kHz is fine; lower it if there’s high EMI)
   • Other defaults (overcurrent, overvoltage, overheat, external faults, etc.) already provide complete protection but can be tuned further if required.
7. Other Common Functions
   • Multi-step Speed: Use DI1, DI2, DI3 in combination to set up multi-speed operation (e.g., fast, slow, jog).
   • PID Control: If you want to control blower pressure or airflow precisely, set C01.00=3 (Process Closed Loop) and configure the PID parameters in Group 07 along with a feedback sensor signal on VI.
   • Jog: Use C03.11 for jog frequency, and assign a DI (e.g., FOR or DIx) to “jog function.”

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V. Using a PLC / Touch Screen / Industrial PC (If Needed)

1. PLC Selection
   • For simpler requirements (start/stop, speed reference, minimal I/O), choose a low-end PLC (e.g., Hailipu, Delta, Xinje, Mitsubishi FX1S/FX3U, etc.).
   • For more comprehensive linkage (e.g., multi-station synchronization, multi-step speeds, fault interlocks), select a mid-range PLC with sufficient I/O.
   • Communication: The HLP-C100 features RS485 (Modbus RTU). If your PLC has RS485, you can connect them directly with twisted-pair wiring. Through PLC registers, you can read/write the inverter’s operating status, fault info, frequency commands, etc.
2. Touch Screen / HMI / Industrial PC
   • If you need HMI operation, you can choose a 7” or 10” screen (e.g., Weintek, Kinco, Hailipu HMI) integrated with the PLC. Alternatively, the HMI can connect directly to the inverter over Modbus RTU.
   • In the HMI configuration software, set the inverter station address, baud rate, and parity (matching C08.31, C08.32, C08.33) for reading and writing the inverter’s registers. This allows remote start/stop, speed setting, alarm monitoring, parameter/recipe management, etc.
   • The same applies to an industrial PC, which can connect via serial RS485 or via a USB/RS232-to-RS485 converter.
3. Wiring and Precautions
   • RS485 Interface: Inverter terminals RS+ and RS- correspond to the PLC’s D+ and D-. Make sure to include the 120 Ω termination resistor if required (move jumper J1 on the inverter to ON or add an external resistor).
   • For multiple inverters on one bus, assign distinct addresses (C08.31) and ensure the same baud rate (C08.32) and data format (C08.33).

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VI. Wiring and Control Diagram Examples (Dashed-Line Version)

Below is an example for a three-phase 380 V supply, with external push-button start/stop and analog speed control:

              Three-phase AC380V
       R ——┐
       S ——┤—— [Circuit Breaker] ——> [HLP-C100 Inverter] ——> U ——> Blower Motor
       T ——┘                                         V
                                                   W
            PE ————————————> Protective Ground


Digital Control:
   +24V (From PLC or external supply) —— Start Button (NO) ——> FOR (inverter)
                                      —— Stop Button (NC) ——> DI1 (inverter)
   Inverter GND —————————————————————> +24V Supply GND

Analog Signal:
   PLC AO(0–10V) ——> VI (inverter)
   PLC AGND       ——> GND (inverter)

Relay Output (optional):
   FA-FB-FC (FB is common; FA normally closed, FC normally open)
   ——> PLC input or alarm indicator

RS485 Communication (optional):
   PLC D+ ——> RS+  (inverter)
   PLC D- ——> RS-  (inverter)
   Common: PLC COM ——> COM (inverter)

If you only wish to use the inverter’s built-in keypad for start/stop and speed adjustment, there is no need for external push buttons—just ensure C00.40 (HAND Key), C00.42 (AUTO Key) are enabled (default). For speed reference, set C03.15=21 (panel potentiometer).

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VII. Conclusion

1. Advantages of This Scheme:
   • You can flexibly adjust the blower motor speed (frequency) as required by the desiccant packaging process.
   • Via external push buttons or PLC/HMI, you can seamlessly switch between automatic and manual control, improving efficiency and convenience.
   • The inverter includes robust built-in protection features to safeguard both the motor and itself.
2. Optional and Extended Features:
   • If your machine requires multi-station linkage or advanced remote monitoring, choose a more capable PLC/HMI and leverage RS485 (Modbus RTU) for centralized control.
   • If harmonic interference is severe, add an input reactor or EMI filter.
   • For rapid braking or high-inertia loads, you can configure a brake unit and suitable brake resistor.
   • If the ambient temperature exceeds 40 °C, derate the inverter or use enhanced cooling to ensure reliable operation.

By following the principles of correct model selection, standardized wiring, and proper parameter configuration, you can fully harness the speed-regulating advantages of the HLP-C100, thereby enhancing the performance and stability of your desiccant packaging machine.

I. Introduction to Operation Panel Functions and Parameter Settings

Introduction to Operation Panel Functions

The operation panel (LCP operator) of the HOLIP HLP-SV series frequency converter provides an intuitive interface for users to set parameters and monitor operations. The operation panel mainly includes a display screen, function keys, navigation keys, potentiometers, and indicators. The display screen shows current parameters, converter status, and other data. The function keys are used to select menus and execute operations. The navigation keys allow for setting, switching, and changing operations within parameter groups, parameters, and parameter internals. The potentiometer is used to adjust motor speed in manual mode. The indicators show the operating status of the converter, such as power access, warnings, and alarms.

Initializing Parameters

To initialize the converter parameters, users can set parameter 14-22 to 2 to restore the converter to factory defaults. This operation will reset all parameters except parameters 15-03 (operating hours counter), 15-04 (overheat count), and 15-05 (overvoltage count) to their factory default values. Before performing this operation, ensure that important parameter settings have been backed up.

Setting and Removing Passwords

To prevent unauthorized parameter modifications, users can set a password. Parameter 0-60 can be used to set a password for the main menu, with a range of 0-999. After setting the password, only by entering the correct password can protected parameters be modified. To remove the password, simply set parameter 0-60 to 0.

Setting Parameter Access Restrictions

The HOLIP frequency converter provides parameter access restriction functions. Users can control the activation and editing permissions of different menus by setting parameters 0-10, 0-11, and 0-12. For example, setting parameter 0-10 to 1 or 2 can activate Menu 1 or Menu 2, respectively. Setting parameter 0-11 to 1 or 2 allows editing of Menu 1 or Menu 2, respectively. Setting parameter 0-12 to 20 enables parameter association between Menu 1 and Menu 2, ensuring that parameters that cannot be changed during operation can be synchronized between the two menus.

II. Terminal Forward/Reverse Control and External Potentiometer Speed Regulation

Terminal Forward/Reverse Control

To achieve motor forward/reverse control, users need to connect external control signals to the digital input terminals of the converter. Typically, terminals 18 and 19 are used to control motor forward and reverse, respectively. The specific wiring method is as follows:

• Forward: Connect the external control signal to terminal 18 (DI1) and the common terminal (COM).
• Reverse: Connect the external control signal to terminal 19 (DI2) and the common terminal (COM).

Additionally, set the functions of terminals 18 and 19 to “Start” and “Reverse” in parameters 5-10 and 5-11, respectively. Also, set the motor rotation direction to “Bidirectional” in parameter 4-10.

External Potentiometer Speed Regulation

External potentiometer speed regulation is a commonly used speed control method. Users can change the motor speed by rotating the potentiometer. The specific wiring method is as follows:

• Connect one end of the external potentiometer to the +10V power terminal of the converter (e.g., terminal 50).
• Connect the other end of the external potentiometer to the analog input terminal of the converter (e.g., terminal 53) and ground (GND).

Then, select “Voltage Signal” as the input signal type for terminal 53 in parameter 6-19, and set the source of Reference Value 1 to “LCP Potentiometer” in parameter 3-15. By rotating the external potentiometer, users can adjust the motor speed in real-time.

III. Fault Codes and Their Solutions

The HOLIP HLP-SV series frequency converter has comprehensive protection functions. When a fault occurs, the converter will display the corresponding fault code. The following are some common fault codes, their meanings, and solutions:

• W/A 2: Signal Float Zero Fault
  • Meaning: This fault occurs when the converter detects that the float zero value of terminal 53 or 60 is less than 50% of the set value.
  • Solution: Check if the signal line connection is normal and ensure a stable signal source.
• W/A 4: Power Phase Loss
  • Meaning: There is a phase loss or excessive voltage imbalance at the power supply terminal.
  • Solution: Check the power input line and power supply voltage for normalcy.
• W/A 7: Overvoltage
  • Meaning: The intermediate circuit voltage (DC) exceeds the converter’s overvoltage limit.
  • Solution: Check if the power supply voltage is too high, connect a braking resistor, or activate “Braking Function/Overvoltage Control” in parameter group 2.
• W/A 9: Converter Overload
  • Meaning: The converter’s electronic thermal protection indicates that the converter is about to disconnect due to overload.
  • Solution: Check if the mechanical system is overloaded, adjust the load, or increase the converter capacity.
• W/A 10: Motor Overheat
  • Meaning: The electronic thermal relay (ETR) protection device indicates motor overheat.
  • Solution: Check the motor load and motor parameter settings for correctness, reduce the load, or improve the cooling conditions.
• A 16: Output Short Circuit
  • Meaning: There is a short circuit in the motor terminal or motor.
  • Solution: Check if the motor insulation is damaged and eliminate the short circuit fault.

The above are only some fault codes and their solutions. Users can refer to the fault code table in the converter user manual for troubleshooting other faults encountered during use.

IV. Conclusion

The HOLIP HLP-SV series user manual provides detailed operation guides and troubleshooting methods for users. By familiarizing with the functions of the operation panel and parameter setting methods, users can easily initialize the converter, set passwords, restrict parameter access, achieve forward/reverse control and external potentiometer speed regulation, and more. At the same time, understanding common fault codes and their solutions helps users quickly troubleshoot and resolve converter faults, ensuring normal equipment operation.

I. Introduction to the Operating Panel Functions

The Vacon NXS_NXP series inverters are equipped with an intuitive and user-friendly operating panel, providing users with a convenient interface for operation and monitoring. The operating panel typically includes a display screen, multiple function buttons, and status indicators. The display screen is used to show the current operating status, parameter values, and fault information. The function buttons are used for navigating menus, modifying parameter values, resetting faults, and other operations. The status indicators display the running status of the inverter, such as running, stopped, alarming, and faulting.

II. How to Initialize Parameters (Specific Parameters)

Before using the Vacon NXS_NXP series inverters, users may need to initialize the parameters to ensure all settings are at their default values. The initialization process usually includes restoring the factory settings of the inverter. Users can follow these steps to initialize the parameters:

1. Enter the System Menu: First, access the system menu (usually labeled as M6) through the operating panel.
2. Select Parameter Sets: In the system menu, find the parameter set option (typically labeled as S6.3.1).
3. Restore Factory Defaults: In the parameter set option, select the “Load Factory Defaults” option and confirm the execution. This will restore all parameters of the inverter to their factory settings.

III. How to Set and Reset Passwords (Specific Parameters)

To protect the settings of the inverter from unauthorized changes, the Vacon NXS_NXP series inverters provide a password protection feature. Users can follow these steps to set and reset passwords:

1. Setting a Password:
   • Enter the system menu (M6).
   • Find the password setting option (usually labeled as S6.5.1).
   • Enter the password value (typically ranging from 1 to 65535) through the buttons on the operating panel.
   • Confirm the password setting.
2. Resetting a Password:
   • Enter the system menu (M6).
   • Find the password setting option (S6.5.1).
   • Enter the current password (if already set).
   • Set the password value to 0 and confirm the execution. This will disable the password protection feature.

IV. How to Set Parameter Access Restrictions (Specific Parameters and Operations)

In addition to password protection, the Vacon NXS_NXP series inverters also provide a parameter access restriction feature, allowing users to restrict access and modification of specific parameters. Users can follow these steps to set parameter access restrictions:

1. Enter the System Menu (M6).
2. Find the Parameter Lock Option (usually labeled as S6.5.2).
3. Enable Parameter Lock: Set the parameter lock option to “Locked” and confirm the execution. This will restrict access and modification of most parameters.
4. Disable Parameter Lock: When needing to modify locked parameters, first set the parameter lock option to “Unlocked” and confirm the execution.

V. How to Achieve External Terminal Forward/Reverse Control and External Potentiometer Speed Regulation

The Vacon NXS_NXP series inverters support motor forward/reverse control through external terminals and speed regulation through external potentiometers. Users need to set the following parameters and connect corresponding terminals:

1. Forward/Reverse Control:
   • Parameter Settings: No specific parameter settings are required, but ensure the control signal source is set to external terminal control (P3.1=1).
   • Wiring: Connect the external forward button or switch to DIN1 (or the designated forward input terminal), and connect the external reverse button or switch to DIN2 (or the designated reverse input terminal).
2. External Potentiometer Speed Regulation:
   • Parameter Settings: Ensure AI1 (or the designated analog input terminal) is set to accept analog voltage or current signals (specific settings depend on the potentiometer type).
   • Wiring: Connect the output end of the potentiometer to AI1 (or the designated analog input terminal), and connect the common terminal of the potentiometer to AI1- (or the corresponding common terminal).

VI. Fault Codes and Their Solutions

The Vacon NXS_NXP series inverters feature comprehensive fault diagnosis capabilities. When a fault is detected, the inverter will display the corresponding fault code and fault information. The following are some common fault codes, their meanings, and solutions:

1. Fault Code F01: Overcurrent
   • Meaning: Motor current exceeds the rated value.
   • Solution: Check if the motor load is too heavy, and check for short circuits or grounding in the motor and cables.
2. Fault Code F02: Overvoltage
   • Meaning: DC bus voltage is too high.
   • Solution: Check if the power supply voltage is too high, extend the deceleration time, or increase the braking resistor.
3. Fault Code F03: Ground Fault
   • Meaning: Motor or cable grounding.
   • Solution: Check the insulation resistance of the motor and cables.
4. Fault Code F05: Charging Switch Fault
   • Meaning: Charging switch failure.
   • Solution: Check the charging switch and its connection lines, and replace the charging switch if necessary.

(Note: The above are only examples of some fault codes. For a complete list of fault codes and solutions, please refer to the inverter user manual.)

Through this guide, we hope to help users better understand and use the Vacon NXS_NXP series inverter user manual, achieving efficient and safe frequency control.

Table of Contents

1. Panel Start, Stop, and Frequency Speed Adjustment
   • Panel Start and Stop Operation
   • Panel Frequency Speed Adjustment Settings
   • Manual Adjustment of Voltage/Frequency Ratio Parameters
   • Inverter Initialization Procedure
   • Password and Parameter Access Restriction Settings
2. Terminal Forward/Reverse Control and External Potentiometer Speed Adjustment
   • Terminal Forward/Reverse Control Settings
   • External Potentiometer Frequency Speed Adjustment Settings
   • Explanation of Required Terminal Connections
3. Fault Codes and Troubleshooting
   • List of Common Fault Codes
   • Fault Meanings Analysis
   • Troubleshooting Methods

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1. Panel Start, Stop, and Frequency Speed Adjustment

Panel Start and Stop Operation

The Danfoss FC 101 series inverter can be started and stopped via the Local Control Panel (LCP). The specific operations are as follows:

• Start: Press the “[Hand On]” key on the LCP to start the motor.
• Stop: Press the “[Off/Reset]” key on the LCP to stop the motor. This key can also be used to reset alarms in alarm mode.

Panel Frequency Speed Adjustment Settings

To achieve panel-based frequency speed adjustment, the following parameters need to be set:

• 3-02 Minimum Reference Value: Sets the minimum allowable frequency reference value.
• 3-03 Maximum Reference Value: Sets the maximum allowable frequency reference value.
• 3-10 Preset Reference Value: Used to set one or more preset frequency reference values, selected via keys on the LCP.

Manual Adjustment of Voltage/Frequency Ratio Parameters

To manually adjust the voltage/frequency (V/F) ratio curve, the following parameters need to be set:

• 1-01 Motor Control Principle: Select [0] U/f control.
• 1-55 U/f Characteristic – U: Set corresponding voltage values for different frequency points.
• 1-56 U/f Characteristic – F: Define the frequency points in the V/F characteristic curve.

Inverter Initialization Procedure

Initializing the inverter restores its parameters to default settings. There are two initialization methods:

• Recommended Initialization:
  1. Select parameter 14-22 Operation Mode.
  2. Press the [OK] key, select [2] Initialize, and then press the [OK] key again.
  3. Disconnect the inverter power supply and wait for the display to turn off.
  4. Reconnect the main power supply.
• Two-Finger Initialization:
  1. Disconnect the inverter power supply.
  2. Simultaneously press and hold the [OK] and [Menu] keys.
  3. Hold the keys for 10 seconds while powering on the inverter.

Password and Parameter Access Restriction Settings

• 0-60 Main Menu Password: Defines the password for accessing the main menu.
• 0-61 Extended Menu No Password: Choose between full access, read-only, or no access.

2. Terminal Forward/Reverse Control and External Potentiometer Speed Adjustment

Terminal Forward/Reverse Control Settings

To achieve terminal-based forward/reverse control, the following parameters need to be set:

• 4-10 Motor Speed Direction: Select [2] Bidirectional to allow both clockwise and counterclockwise rotation.
• 5-10 Terminal 18 Digital Input: Set to [10] Reverse to control motor reversal.

External Potentiometer Frequency Speed Adjustment Settings

To achieve external potentiometer-based frequency speed adjustment, the following parameters need to be set, and terminal 53 (analog input) needs to be connected:

• 3-15 Reference Source 1: Select [1] Analog Input 53.
• 6-00 Disconnect Timeout Time: Set the timeout time for analog input disconnection.
• 6-01 Disconnect Timeout Function: Select the function when disconnected, such as lock output or stop.

Explanation of Required Terminal Connections

• Terminal 18: Connect the digital input signal for reverse control.
• Terminal 53: Connect the external potentiometer for frequency speed adjustment.
• Terminal 27: Typically used for start/stop control, specific function needs to be set in parameters.

3. Fault Codes and Troubleshooting

List of Common Fault Codes

• Alarm 2: Disconnect Fault
• Alarm 3: No Motor Connected
• Alarm 4: Main Supply Phase Loss
• Alarm 13: Overcurrent
• Alarm 14: Earth Fault
• Alarm 24: Fan Fault
• Alarm 30: Motor Phase U Loss
• Alarm 95: Broken Belt

Fault Meanings Analysis

• Disconnect Fault: Analog input signal is below the set value.
• No Motor Connected: No motor is connected to the inverter output terminals.
• Main Supply Phase Loss: Main power supply has missing phases or unstable voltage.
• Overcurrent: Motor current exceeds the inverter peak current limit.
• Earth Fault: Output phase is discharged to earth through motor cables or the motor itself.
• Fan Fault: Fan is not running or not installed.
• Motor Phase Loss: One phase is missing between the motor and the inverter.
• Broken Belt: Torque is below the set value, indicating a possible broken belt.

Troubleshooting Methods

• Disconnect Fault: Check analog input terminal connections and signal source.
• No Motor Connected: Check motor connections to the inverter.
• Main Supply Phase Loss: Check main power supply and voltage stability.
• Overcurrent: Check motor load and parameter settings to ensure motor compatibility.
• Earth Fault: Check motor cable and grounding connections.
• Fan Fault: Check fan resistance and operation.
• Motor Phase Loss: Check motor connections and cables.
• Broken Belt: Check the drive system and belt condition.

By following the above settings and troubleshooting methods, users can effectively operate and maintain the Danfoss FC 101 series inverter, ensuring its stable operation and meeting application requirements.

I. Introduction to Operation Panel Functions and Parameter Settings

The HOLIP Inverter HLP-A series boasts a comprehensive operation panel that allows users to perform parameter settings, monitor operating status, and diagnose faults. The operation panel primarily includes a display screen, directional keys, set keys, run keys, stop keys, and other functional keys.

Setting and Resetting Passwords

To protect against unauthorized modification of inverter parameters, the HLP-A series supports password protection. Users can enable password protection by setting parameter CD010 to 1, at which point all parameters except CD010 become unmodifiable. To reset the password, simply set CD010 back to 0.

Locking Parameters

To prevent non-maintenance personnel from accidentally modifying parameters, users can lock all parameters except CD010 by setting CD010 to 1. Once locked, only the correct password (set through parameter CD011) can unlock the parameters for modification.

Initializing Parameters

When it is necessary to restore the inverter to its factory settings, users can set parameter CD011 to 08 and then press the run and stop keys simultaneously. The inverter will automatically restart and revert to its factory settings.

II. Terminal Forward/Reverse Control and External Potentiometer Frequency Adjustment

Terminal Forward/Reverse Control

The HLP-A series inverter supports forward/reverse control via external terminals. Users need to set the multi-function input terminal FOR to forward (parameter CD050=02) and REV to reverse (parameter CD051=03). Then, by controlling the on/off state of these terminals with external switches, motor forward/reverse control can be achieved.

External Potentiometer Frequency Adjustment

External potentiometer speed control is a commonly used method for variable frequency speed control. Users need to set the inverter’s operation command source to external terminals (parameter CD033=1) and the operation frequency source to external analog (parameter CD034=1). Connect the potentiometer’s center tap to the VI terminal and its ends to the +10V and ACM terminals, respectively. By adjusting the potentiometer’s resistance, the inverter’s output frequency can be changed, thereby achieving motor speed control.

III. Fault Codes and Solutions

The HLP-A series inverter features comprehensive fault protection functions. When a fault occurs, the inverter will display the corresponding fault code. Below are some common fault codes, their meanings, and solutions:

E.OC.A (Overcurrent During Acceleration)

Meaning: The inverter experiences overcurrent during acceleration.

Solution: Check for short circuits or partial short circuits in the motor, and ensure good insulation of output wires; extend the acceleration time; check the inverter configuration for reasonableness and increase the inverter capacity if necessary; reduce the torque boost setting.

E.GF.S (Ground Fault)

Meaning: The inverter output is short-circuited to ground.

Solution: Check for short circuits in motor connections and ensure good insulation of output wires; if the fault cannot be resolved, contact the manufacturer for repair.

E.OU.S (Overvoltage During Stopping)

Meaning: The inverter experiences overvoltage during stopping.

Solution: Extend the deceleration time or install a braking resistor; improve the grid voltage quality and check for sudden voltage fluctuations.

E.OL.A (Inverter Overload)

Meaning: The inverter is overloaded.

Solution: Check if the inverter capacity is too small and increase it if necessary; check for stuck mechanical loads; reset the V/F curve.

E.OT.A (Motor Overtorque)

Meaning: The motor experiences overtorque.

Solution: Check for fluctuations in mechanical loads; check if the motor configuration is too small; check for deterioration in motor insulation due to overheating; check for significant voltage fluctuations; check for phase loss; check for increased mechanical loads.

IV. Conclusion

The HOLIP Inverter HLP-A series user manual provides users with detailed operation guides and fault solutions. By understanding the operation panel functions, mastering terminal control and potentiometer speed adjustment methods, and being familiar with fault code meanings and solutions, users can better utilize and maintain the inverter, ensuring its stable operation and extended service life. In practical applications, users should strictly follow the instructions in the manual for operation and maintenance to ensure the performance and safety of the inverter.

I. Introduction to the Danfoss Frequency Converter FC202 Operation Panel Functions

The Danfoss Frequency Converter FC202 series boasts a powerful operation panel that includes both a Graphical Local Control Panel (GLCP) and a Numerical Local Control Panel (NLCP). These control panels provide extensive status displays, parameter settings, and fault alarm functions, enabling users to easily monitor and control the operating status of the frequency converter.

1.1 Monitoring Parameters for Water/Wastewater Applications (Parameter Group 22)

When monitoring water/wastewater applications, users can set and monitor relevant parameters by accessing parameter group 22 of the frequency converter. Specific steps are as follows:

1. Enter Parameter Group 22: First, press the [Quick Menu] button on the panel, then use the navigation keys to select “Function Set-up”, followed by “Application Functions”, and finally enter parameter group 22.
2. Set and Monitor Parameters: In parameter group 22, users can set and monitor key parameters such as low power detection, low speed detection, no-flow functions, and dry pump detection. For example, parameter 22-20 can be used to enable automatic low power settings, and parameter 22-23 can be used to select the operation mode (sleep mode or warning message) when the no-flow function is activated.

1.2 Encrypting and Locking Parameters

To prevent unauthorized parameter modifications, users can encrypt and lock the frequency converter parameters. Specific steps are as follows:

1. Enter Password Settings: In parameter group 0, select parameter 0-60 (Extended Menu Password) or parameter 0-65 (Personal Menu Password) to set the password.
2. Lock Parameters: After setting the password, users can set the frequency converter to “Password Protected” mode via parameter 14-22 (Operating Mode). At this point, only users who enter the correct password can modify the parameters.

1.3 Restoring Factory Default Settings

When users need to restore the frequency converter parameters to their factory default settings, they can achieve this through the following steps:

1. Power Cycle: First, disconnect the main power supply of the frequency converter and wait for a period before reconnecting it.
2. Initialize Settings: After the frequency converter is powered on again, press the relevant buttons on the panel (the specific buttons vary depending on the panel type) to enter initialization mode, and then follow the on-screen prompts to complete the initialization operation. At this point, all parameters of the frequency converter will be restored to their factory default settings.

II. Forward/Reverse Control via Terminals and External Potentiometer Frequency Adjustment

2.1 Forward/Reverse Control via Terminals

To achieve forward/reverse control via terminals, users need to follow these wiring and parameter setting steps:

1. Wiring: Connect the signal wires for forward and reverse control to the corresponding control terminals of the frequency converter (the specific terminal numbers vary depending on the model).
2. Parameter Settings: Enter parameter group 5, select the digital input parameters (such as 5-10 and 5-11), and set the corresponding terminals to forward and reverse functions.

2.2 External Potentiometer Frequency Adjustment

To achieve external potentiometer frequency adjustment, users need to follow these wiring and parameter setting steps:

1. Wiring: Connect the output signal wire of the external potentiometer to the analog input terminal of the frequency converter (such as terminal 53). At the same time, ensure that the power supply for the potentiometer is correctly connected.
2. Parameter Settings: Enter parameter group 6, select the analog input parameters (such as 6-10 and 6-11), and set the input voltage range and calibration value for terminal 53. Then, in parameter group 3, select the reference value source parameter (such as 3-15) and set the reference value source to analog input terminal 53.

III. Fault Codes and Solutions

The Danfoss Frequency Converter FC202 series provides a wealth of fault codes to help users quickly locate and resolve faults. Below are some common fault codes, their meanings, and solutions:

3.1 Common Fault Codes and Meanings

• Alarm 1: 10V Voltage Low. Indicates that the voltage at control card terminal 50 is below 10V.
• Alarm 2: Disconnection Fault. Indicates that the signal on a certain analog input is below 50% of the minimum value set for that input.
• Alarm 4: Main Power Phase Loss. Indicates that a phase of the power supply is missing or the grid voltage is unstable.
• Alarm 9: Inverter Overload. Indicates that the inverter has shut down due to overload (excessively high current for an extended period).
• Alarm 12: Torque Limit. Indicates that the torque exceeds the set torque limit value.

3.2 Solutions

• For Alarm 1: Check the wiring and load condition of terminal 50 to ensure stable voltage and do not exceed the maximum load.
• For Alarm 2: Check the wiring and signal source of the analog input terminal to ensure proper operation.
• For Alarm 4: Check the power supply voltage and current of the frequency converter for stability and inspect the power line for any open circuits or short circuits.
• For Alarm 9: Check whether the motor is overloaded or has mechanical faults and adjust the current limit parameter of the frequency converter.
• For Alarm 12: Check whether the load exceeds the carrying capacity of the frequency converter and adjust the torque limit parameter.

IV. Conclusion

The Danfoss Frequency Converter FC202 Series User Manual provides detailed operation guides and parameter setting instructions, enabling users to easily monitor and control the operating status of the frequency converter. By setting parameters and wiring correctly, users can achieve various control functions of the frequency converter, such as forward/reverse control and external potentiometer frequency adjustment. At the same time, users can quickly locate and resolve fault issues by consulting fault codes and solutions. These features make the Danfoss Frequency Converter FC202 series an ideal choice for applications in water/wastewater and other fields.

The Danfoss VLT® AutomationDrive FC 360 series is a powerful and versatile frequency converter suitable for a wide range of industrial control applications. This article will provide a detailed operation guide for this series of frequency converters, covering the control panel functions, parameter operations, terminal control, and fault code handling.

I. Control Panel Function Introduction

The Danfoss VLT® AutomationDrive FC 360 series offers two types of control panels: the Numeric Local Control Panel (NLCP) and the Graphical Local Control Panel (GLCP), to meet the needs of different users.

1.1 Basic Control Panel Operations

• Numeric Local Control Panel (NLCP):
  • Display: Shows current operating parameters and status.
  • Menu Key: Switches between status menu, quick menu, and main menu.
  • Navigation Keys and Indicators: Used for parameter selection and value adjustment, with indicators showing the converter status.
  • Operation Keys: Including [Hand On], [Auto On], [Reset], etc., for manual start, automatic start, and reset operations.
• Graphical Local Control Panel (GLCP):
  • Similar functions to NLCP but with a larger display for richer information and multi-language support.

1.2 Parameter Copying and Restoration

• Parameter Copying:
  1. Upload parameters from Converter A to the control panel: On Converter A, enter the main menu, select “LCP Copy” function, and upload parameters to LCP.
  2. Download parameters from the control panel to Converter B: On Converter B, enter the main menu, select “LCP Copy” function, and download parameters from LCP to the converter.
• Parameter Initialization:
  Enter the main menu, select the “Operating Mode” parameter, set it to “Initialize” and execute, or reset parameters to factory defaults.
• Encryption and Parameter Level Settings:
  Protect parameters from unauthorized changes by setting a password (parameter 0-60). Additionally, parameters 0-10 and 0-11 can be used to set the validity and editing permissions of different menus.
• Compressor Control Parameter Settings:
  Adjust startup parameters (e.g., 1-75 Startup Speed, 1-76 Startup Current), stop parameters (e.g., 1-80 Stop Function), and acceleration/deceleration times (e.g., 3-41 Ramp 1 Acceleration Time) according to compressor application requirements.

II. Terminal Forward/Reverse Control and External 4-20mA Frequency Setting

2.1 Forward/Reverse Control

• Wiring:
  • Forward Control: Connect the control signal to terminal 18 (Digital Input [8] Start).
  • Reverse Control: Connect the control signal to terminal 19 (Digital Input [10] Reverse).
• Parameter Settings:
  • Enter the Digital Input parameter group (5-1*), and set the functions of terminals 18 and 19 to start and reverse, respectively.

2.2 External 4-20mA Frequency Setting

• Wiring:
  • Connect the external 4-20mA signal to terminal 53 or 54 (depending on the analog input configuration).
• Parameter Settings:
  1. Enter the Analog Input parameter group (6-1* or 6-2*), and configure terminal 53 or 54 as a current input mode.
  2. Set the minimum and maximum values for the analog input (e.g., 6-10 Terminal 53 Low Voltage, 6-11 Terminal 53 High Voltage), as well as the corresponding feedback or reference value.
  3. In the Reference parameter group (3-1*), select the external analog input as one of the reference sources.

III. Fault Code Handling

The Danfoss VLT® AutomationDrive FC 360 series provides extensive fault codes to help users quickly locate and resolve issues.

• Common Fault Codes and Meanings:
  • Alarm 14: Earth Fault: Output phase is discharging to earth through the cable between the motor and the converter or the motor itself.
  • Alarm 16: Short Circuit: Short circuit occurs in the motor or motor circuit.
  • Alarm 30: Motor Phase U Missing: Motor U phase is missing between the converter and the motor.
  • Alarm 61: Feedback Error: Deviation exists between the calculated speed and the speed measurement value from the feedback device.
• Fault Handling:
  • Refer to the fault diagnosis section in the user manual based on the fault code, check the corresponding circuit connections, motor status, and parameter settings.
  • After resolving the fault, perform a reset operation through the control panel or an external reset signal to restore normal operation of the converter.

IV. Conclusion

The Danfoss VLT® AutomationDrive FC 360 series user manual provides a comprehensive operation guide, covering control panel functions, parameter operations, terminal control, and fault code handling. By mastering these operation guides, users can better use and maintain the frequency converter, ensuring its stable and reliable operation in various industrial control scenarios. In practical applications, users should also flexibly adjust parameter settings and control strategies based on specific application requirements and field environments to achieve optimal control effects.

I. How to Achieve Forward/Reverse Rotation and Speed Control via External Terminals

The VACON NX series of frequency converters allows for straightforward forward/reverse rotation and speed control via external terminals. Here’s how to achieve this:

1. Terminal Connections:
   • Forward/Reverse Control:
     • Forward rotation is typically connected to the DI1 (forward start) terminal of the frequency converter.
     • Reverse rotation is typically connected to the DI2 (reverse start) terminal.
     • Note that different NX series models may have different terminal numbers; refer to the specific model’s user manual for confirmation.
   • Potentiometer Speed Control:
     • Connect the three terminals of the potentiometer to the AI1 (analog input 1), GND (ground), and +10V (analog input positive power) terminals of the frequency converter, respectively.
2. Parameter Settings:
   • Forward/Reverse Parameters:
     • Set the control source to external terminal control and ensure that the DI1 and DI2 functions are correctly configured for forward and reverse rotation.
   • Potentiometer Speed Control Parameters:
     • Set AI1 as the frequency reference source.
     • Adjust the input range of AI1 as needed to ensure that the potentiometer’s output range matches the frequency converter’s frequency range.

II. Characteristics of PID Function and Its Application in Constant Pressure Control of Water Pumps

The PID function of the VACON NX series frequency converter is highly capable and suitable for various automatic control applications. Here are its key features and how to apply it to constant pressure control of water pumps:

1. PID Function Characteristics:
   • Supports multiple PID control modes, including standard PID and sleep/wake-up functions.
   • Flexible PID parameter configuration via external terminals or fieldbus.
   • Provides comprehensive monitoring and alarm functions to ensure stable system operation.
2. Application in Water Pump Constant Pressure Control:
   • Terminal Connections:
     • Connect the output signal of the pressure sensor to the AI1 (analog input 1) terminal of the frequency converter.
     • Connect other control terminals as needed, such as start and stop.
   • Parameter Settings:
     • Set AI1 as the actual value input for PID control.
     • Configure the reference value for the PID controller (target pressure value).
     • Adjust the PID parameters (proportional, integral, derivative) to achieve optimal control performance.
     • Set the sleep/wake-up function as needed to save energy.

III. Fieldbus Protocol and Communication with Siemens PLC

The VACON NX series supports multiple fieldbus protocols, including Profibus, Modbus, etc., facilitating communication with various PLCs. Here’s how to set up communication with a Siemens PLC:

1. Fieldbus Protocol:
   • The NX series supports multiple fieldbus protocols; users can select the appropriate protocol based on actual needs.
2. Communication with Siemens PLC:
   • Wiring:
     • Connect the frequency converter’s fieldbus interface to the corresponding interface of the Siemens PLC using a dedicated fieldbus communication cable.
   • Parameter Settings:
     • Configure fieldbus parameters in the frequency converter, including station address, baud rate, etc.
     • Configure corresponding communication parameters in the Siemens PLC to ensure compatibility with the frequency converter.
     • Program the PLC to send start, stop, and speed adjustment commands to the frequency converter via the fieldbus.

IV. Fault Code Meaning Analysis and Troubleshooting

The VACON NX series provides comprehensive fault codes to help users quickly locate and resolve issues. Here are some common fault codes, their meanings, and troubleshooting methods:

1. F1: Overcurrent Fault
   • Meaning: The output current of the frequency converter exceeds the set value.
   • Troubleshooting: Check for motor overload, cable short circuits, and correct frequency converter parameter settings.
2. F2: Overvoltage Fault
   • Meaning: The DC bus voltage of the frequency converter is too high.
   • Troubleshooting: Check for stable input voltage and proper operation of the braking resistor.
3. F5: Charging Switch Fault
   • Meaning: The internal charging switch of the frequency converter is abnormal.
   • Troubleshooting: Check the charging switch and related circuits for proper functioning.

V. Conclusion

The VACON NX series user manual provides detailed usage guides and parameter setting instructions, helping users quickly get started and implement various complex control functions. Through this guide, users should now have a comprehensive understanding of how to achieve forward/reverse rotation and speed control via external terminals, the characteristics and application of the PID function, fieldbus protocol and communication with Siemens PLC, as well as the meanings and troubleshooting methods of fault codes. In practical applications, users should flexibly configure parameters and wiring based on specific needs and site conditions to achieve optimal control performance.