Category: Industrial control technology

Preamble: Getting to Know the Weite TW-ZX Series Frequency Inverter

The Weite TW-ZX series frequency inverter is a high-performance drive control device specifically designed for lifting equipment. It is particularly suitable for precise control of heavy-duty machinery such as construction elevators and tower cranes. As a leading electrical transmission solution in the industry, this series of frequency inverters integrates advanced motor control algorithms and a rich set of functional configurations, enabling it to meet the stringent requirements of various lifting application scenarios.

This technical guide will comprehensively analyze the functional features, installation specifications, parameter settings, and maintenance essentials of the Weite TW-ZX frequency inverter, aiming to provide users with a systematic operational reference. By thoroughly understanding the content of this manual, users can fully leverage the performance advantages of the equipment, ensuring the safe, stable, and efficient operation of lifting equipment.

The TW-ZX series frequency inverter adopts optimized control algorithms specifically tailored for lifting applications, featuring core characteristics such as low-frequency high-torque output, intelligent braking control, and wide voltage adaptability. It is renowned in the industry for its high reliability and exceptional control precision. Below, we will commence with an overview of the product’s features and gradually unfold a complete application guide for this professional device.

I. Core Product Features and Technical Advantages

1.1 Professional Lifting Control Functions

The Weite TW-ZX frequency inverter is specifically designed for the lifting industry, incorporating a range of highly targeted professional functions:

Low-Frequency High-Torque Output: At 0.5Hz, it can provide 150% of the rated torque, ensuring stability during heavy-load startups and low-speed operations. This feature is particularly suitable for tower crane hoisting and elevator applications, addressing the industry challenge of insufficient torque in traditional frequency inverters at low frequencies.

Intelligent Brake Control Logic: It incorporates optimized braking timing control to precisely coordinate the actions of mechanical brakes and motors. Parameters Fb-00 to Fb-11 allow for flexible adjustment of brake release/closure frequencies and delay times, effectively preventing hook slippage and significantly enhancing operational safety.

Dynamic Current Limiting Technology: Advanced current control algorithms automatically adjust output during severe load fluctuations, preventing frequent overcurrent trips. Users can configure current stall protection characteristics via parameter FC-07 to balance system response speed and stability.

Wide Voltage Adaptability: The input voltage range extends up to 380V±20%, with automatic voltage regulation (AVR) functionality. It maintains sufficient torque output even when grid voltage drops, making it particularly suitable for construction sites with unstable grid conditions.

1.2 Hardware Design Characteristics

The TW-ZX series reflects the unique needs of lifting equipment in its hardware architecture:

Enhanced Cooling Design: The entire series adopts a forced air cooling structure with real-time protection against overheating of the散热器 (radiator) (OH fault), ensuring reliable operation in high-temperature environments. Larger power models (above 90kW) utilize an up-draft and down-draft air duct design to optimize cooling efficiency.

Modular Power Units: The power modules employ industrial-grade IGBT devices with an overload capacity of 150% rated current for 1 minute and 180% rated current for 10 seconds, fully meeting the short-term overload requirements of lifting equipment.

Rich Interface Configuration: It provides 7 multifunctional digital input terminals (X1-X7), 2 analog inputs (VS/VF for voltage signals, IS/IF for current signals), 2 open-collector outputs (Y1/Y2), and 1 relay output (R1), catering to complex control needs.

Built-in Brake Units (Select Models): Models below 18.5kW come standard with built-in brake units, allowing direct connection to brake resistors. Larger power models require external dedicated brake units, with the BR100 series recommended as a complementary product.

1.3 Control Performance Advantages

Compared to general-purpose frequency inverters, the TW-ZX series has undergone in-depth optimization in its control algorithms:

Optimized S-Curve Acceleration/Deceleration: Parameter FC-00 enables the S-curve acceleration/deceleration mode, with FC-01/02 setting the S-curve proportions for the acceleration and deceleration phases, respectively, effectively reducing mechanical shock and enhancing operational smoothness.

Multi-Speed Precise Control: It supports up to 16 preset speed stages (F3-00 to F3-14), allowing rapid switching through terminal combinations to meet the speed requirements of lifting equipment under various operating conditions. Each speed stage can independently set acceleration and deceleration times (F3-15 to F3-20).

Motor Parameter Self-Learning: It offers both stationary and rotational self-identification modes (F1-15) to automatically measure motor electrical parameters, significantly improving vector control accuracy. For applications where the load cannot be decoupled, the stationary identification mode provides a safe and reliable option.

Table: Typical Models and Specifications of the TW-ZX Series Frequency Inverter

Model	Rated Power (kW)	Rated Current (A)	Brake Unit	Dimensions (mm)
TW-ZX-011-3	11	26	Built-in	270×200×470
TW-ZX-022-3	22	48	Built-in	386×300×753
TW-ZX-045-3	45	90	Built-in	497×397×1107
TW-ZX-110-3	110	220	External	855×825×793

II. Equipment Installation and Electrical Wiring Specifications

2.1 Mechanical Installation Requirements

Proper installation is fundamental to ensuring the long-term reliable operation of the frequency inverter. The TW-ZX series requires particular attention to the following points during installation:

Installation Orientation: It must be installed vertically to ensure unobstructed airflow through the cooling ducts. Sufficient space (recommended ≥100mm) should be left on all sides to prevent heat accumulation. When multiple frequency inverters are installed side by side in a control cabinet, the ambient temperature should not exceed 40℃.

Environmental Conditions: The operating environment should have a temperature range of -10℃ to +40℃ and a humidity range of 20% to 90%RH (non-condensing). It should be avoided in locations with conductive dust, corrosive gases, or oil mist, and kept away from vibration sources and electromagnetic interference sources.

Vibration Protection: The installation base should be sturdy and vibration-free, with a maximum allowable vibration of 0.5g. For vehicle-mounted or mobile equipment applications, shock absorbers are recommended to prevent internal components from loosening due to prolonged vibration.

Protection Level: Standard models have a protection level of IP20 and are not suitable for direct exposure to outdoor or humid environments. For special environments, customized protective enclosures or models with higher protection levels should be selected.

2.2 Main Circuit Wiring Specifications

The main circuit wiring directly affects system safety and EMC performance, and must strictly adhere to the following specifications:

Power Input Terminals (R/S/T):

• A suitable circuit breaker (MCCB) must be installed, with a rated current of 1.5 to 2 times the rated value of the frequency inverter.
• The power cable cross-sectional area should be selected according to Table 3-3, ensuring a voltage drop not exceeding 5V.
• An AC reactor (optional) can be installed on the input side to suppress grid surges and harmonics.

Motor Output Terminals (U/V/W):

• Motor cables should be shielded cables or laid through metal conduits to reduce electromagnetic radiation.
• It is absolutely prohibited to install power factor correction capacitors or LC/RC filters on the output side.
• When the motor wiring length exceeds 50 meters, the carrier frequency should be reduced or an output reactor should be installed.

Brake Resistor Connection:

• For models with built-in brake units, connect to the PB terminals. For models with external brake units, connect to the P/N terminals.
• The resistance value and power rating must be strictly selected according to Table 11-1 to prevent overload damage to the brake unit.
• Brake resistor wiring must use high-temperature-resistant cables and be kept away from flammable materials.

Grounding Requirements:

• The protective grounding terminal must be reliably grounded (Class III grounding, grounding resistance <10Ω).
• The grounding wire cross-sectional area should be no less than half of the power cable cross-sectional area, with a minimum of 16mm².
• When grounding multiple frequency inverters, avoid forming grounding loops and adopt a star grounding configuration.

2.3 Control Circuit Wiring Essentials

The control circuit serves as the bridge for interaction between the frequency inverter and external devices, and special attention should be paid to the following points during wiring:

Analog Signal Processing:

• Speed reference signals (VS/VF) should use twisted-pair shielded cables, with the shield grounded at one end.
• Signal lines should be separated from power lines by a distance of no less than 30cm and arranged perpendicularly when crossing.
• Jumpers JP1/JP2 can select the analog output M0/M1 to operate in voltage (0-10V) or current (0-20mA) mode.

Digital Terminal Configuration:

• By default, X1 is set for operation, X2 for forward/reverse rotation, and X3-X7 are programmable for functions such as multi-speed control (F2-00 to F2-06).
• The PLC common terminal can be connected to either 24V or COM, supporting both NPN and PNP wiring modes.
• The relay output R1 (EA-EB-EC) can directly drive contactor coils, with a contact rating of 250VAC/3A.

RS485 Communication:

• Use shielded twisted-pair cables to connect the A+/A- terminals, with proper termination resistor matching.
• Communication parameters are set via F1-16 to F1-19, supporting the Modbus RTU protocol.
• It is recommended to set the baud rate not exceeding 19200bps and reduce the rate for long-distance communication.

Figure: Standard Wiring Diagram for the TW-ZX Frequency Inverter
[Insert wiring diagrams similar to Figures 12-1 to 12-4 here, showcasing typical application wiring for elevators, tower crane hoisting, etc.]

III. Parameter Settings and Functional Configuration

3.1 Basic Parameter Setting Procedure

After powering on the TW-ZX frequency inverter, follow the procedure below for basic settings:

Restore Factory Settings:

• Set F0-28=1 to restore the factory settings corresponding to the application macro.
• Select F4-28=9 for elevator applications and F4-28=6 for tower crane hoisting applications.
• After resetting, check F0-27=1 to ensure all parameter groups are displayed.

Motor Parameter Input:

• Accurately input the motor nameplate data (F1-00 to F1-07).
• For elevators with dual motors in parallel, set the power and current to the sum of the two motors.
• The motor winding connection method (F1-06) must match the actual configuration (Y/△).

Motor Parameter Self-Learning:

• Perform rotational self-identification (F1-15=2) after decoupling the load.
• If the load cannot be decoupled, select stationary self-identification (F1-15=1).
• Do not operate the frequency inverter during the identification process. Parameters are automatically stored upon completion.

Speed Control Parameters:

• Set the maximum frequency F0-16 (usually 50Hz) and the upper limit frequency F0-17.
• Adjust the acceleration time F0-09 and deceleration time F0-10, extending them appropriately for heavy loads.
• The carrier frequency F0-14 is generally set to 1-4kHz, and can be increased if noise is significant.

Terminal Function Allocation:

• Configure X3-X7 according to application requirements for functions such as multi-speed control and fault reset.
• Set the output functions for Y1/Y2/R1, such as fault signals and brake control.

3.2 Configuration of Lifting-Specific Functions

The TW-ZX series requires special configuration for the unique functions tailored to lifting applications:

Brake Control Timing:

• Set the ascending brake release frequency Fb-00 (usually 3Hz) and the descending release frequency Fb-01.
• Configure the pre-release delay Fb-02 (approximately 0.3s) and the post-release delay Fb-03.
• Set the brake closure frequencies Fb-04/Fb-11 and the corresponding delays Fb-05/Fb-06.

Zero-Crossing Acceleration Function:

• Enable Fb-09 to set the zero-crossing acceleration/deceleration time (approximately 2s).
• Adjust Fb-10 to set the frequency point for acceleration/deceleration changes (usually 2.5Hz).
• Combine with S-curve parameters FC-01/02 to achieve smooth transitions.

Brake Inspection Function:

• Set the inspection torque Fd-09 (150% of rated) and time Fd-10 (4s).
• Define the inspection interval Fd-16 (e.g., 80 hours).
• Set the Y2 terminal to provide a brake inspection reminder (F2-13=27).

Industry-Specific Protections:

• Disable current limiting FC-07=0 and overvoltage stall FC-19=0010.
• Mask steady-state overvoltage protection FC-28=00010000.
• Set the number of fault retry attempts FC-24=01 (1 attempt).

3.3 Multi-Speed and PID Applications

The TW-ZX series supports flexible multi-speed and PID control schemes:

Multi-Speed Configuration:

• Preset 16 speed stages via F3-00 to F3-14.
• Define X3-X6 as multi-speed terminals using F2-02 to F2-05.
• Each speed stage can be associated with different acceleration and deceleration times (F3-15 to F3-20).

PID Control:

• Select the PID feedback source (F4-01) and reference source (F4-02).
• Set the proportional gain F4-03 and integral time F4-04.
• Define the PID output characteristics F4-05 and filtering time F4-06.

Analog Signal Processing:

• Configure VS/VF as speed references (F2-08/F2-10=0).
• Adjust the analog input filtering F8-04/F8-06.
• Calibrate the range of the analog outputs M0/M1 (F2-22 to F2-27).

IV. Operation and Fault Handling

4.1 Operation Modes and Monitoring

The TW-ZX frequency inverter offers multiple operation and monitoring modes:

Operation Mode Selection:

• Keyboard control (F0-04=0): Operate using the panel RUN/STOP keys.
• Terminal control (F0-04=1): Supports two-wire/three-wire modes (F0-05).
• Communication control (F0-04=2): Remote start/stop via RS485.

Operational Status Monitoring:

• View real-time output frequency C0-00, current C0-13, and other parameters.
• Monitor terminal statuses C0-26 (inputs) and C0-27 (outputs).
• Output key parameters to meters via M0/M1 analog outputs.

Inching and Micro-Movement Operations:

• Set the inching frequency F0-11 (usually 5Hz).
• Adjust the inching acceleration and deceleration times F0-12/F0-13.
• Operate using the JOG key or defined inching terminals.

4.2 Commissioning Steps

New equipment or equipment after major repairs should undergo commissioning according to the following specifications:

No-Load Testing:

• Decouple the load and operate at low speed to check the rotation direction and vibration.
• Gradually increase the frequency and observe whether the current and speed are normal.
• Test the switching between speed stages and the timing of brake actions.

Light-Load Testing:

• Apply 10-30% of the rated load to verify torque output.
• Check whether all protection functions are operating normally.
• Measure the temperature rise at key points (brake resistor, radiator, etc.).

Full-Load Testing:

• Gradually load to the rated load and operate continuously for 1 hour.
• Record operational parameters and confirm the absence of abnormal vibration and noise.
• Test the emergency stop function and fault self-reset capability.

4.3 Common Fault Analysis and Handling

Diagnosis and handling methods for common faults in the TW-ZX series frequency inverter:

Overcurrent Fault (HOC/SOC):

• Check motor insulation and cable connections.
• Extend acceleration and deceleration times and adjust torque boost.
• Verify whether the load exceeds the capacity of the frequency inverter.

Overvoltage Fault (HOU/SOU):

• Increase the deceleration time or install a brake unit.
• Check whether the grid voltage is too high.
• Enable the overvoltage stall function FC-19=2.

Brake-Related Faults:

• Check the mechanical condition and power supply of the brake.
• Readjust the brake timing parameters Fb-xx.
• Confirm that the brake inspection current Fb-28 is set reasonably.

Cooling Fault (OH):

• Clean the air ducts of dust and check the fan operation.
• Reduce the carrier frequency to decrease heat generation.
• Improve the ventilation conditions of the installation environment.

Table: Quick Reference Table for Fault Codes of the TW-ZX Series Frequency Inverter

Fault Code	Type	Possible Causes	Recommended Actions
SC/EMC	Short Circuit	Output short circuit or module damage	Check motor cables and insulation
HOC	Instantaneous Overcurrent	Acceleration too fast or load突变 (sudden change)	Extend acceleration time F0-09
Ol	Overload	Continuous overload operation	Check load or replace with a larger frequency inverter
StP	Brake Inspection Failure	Insufficient braking torque	Adjust brake or increase Fd-09

V. Maintenance, Upkeep, and Advanced Techniques

5.1 Regular Maintenance Plan

To ensure the long-term reliable operation of the TW-ZX frequency inverter, the following maintenance plan is recommended:

Daily Inspection:

• Listen for abnormal noise and check the cooling fan status.
• Record the DC bus voltage (C0-16) and radiator temperature.
• Check for loose or overheated connections at various terminals.

Quarterly Maintenance:

• Clean internal dust (after powering off).
• Tighten the screws of the main circuit terminals to the specified torque.
• Check electrolytic capacitors for bulging or leakage.

Annual Overhaul:

• Test the insulation resistance (between terminals and to ground).
• Calibrate the accuracy of analog signal detection.
• Replace aging components (fans, capacitors, etc.).

5.2 Parameter Backup and Restoration

The TW-ZX frequency inverter supports advanced functions for parameter management:

Parameter Copying:

• Use F3-31=1 to upload parameters to the operation panel.
• Use F3-31=2 to download parameters to other frequency inverters.
• It is recommended to save multiple versions of parameter backups.

Password Protection:

• Set a user password F0-31 to prevent unauthorized operations.
• Parameter locking is available in two levels (F0-29=1/2).
• If the password is forgotten, contact the manufacturer’s technical support.

Fault Record Query:

• View current and historical faults via the E0 group.
• Record operational status parameters at the time of the fault.
• Analyze fault frequency and occurrence conditions.

5.3 Performance Optimization Techniques

Advanced adjustment methods for specific applications:

Dynamic Response Optimization:

• Adjust slip compensation F3-30 (usually 100%).
• Optimize stator voltage drop compensation F7-25.
• Fine-tune dead-time compensation F7-26.

Energy-Saving Operation Settings:

• Enable energy-saving mode FC-10=1.
• Set the energy-saving starting frequency FC-11 (e.g., 20Hz).
• Adjust the energy-saving delay time FC-13.

Communication Network Configuration:

• Set the station address F1-16 and baud rate F1-17.
• Select the parity check method F1-18 (none/even/odd).
• Define the communication timeout F1-30 (0 for disabled).

I. Operation Panel Functions and Basic Settings

1. Introduction to Operation Panel Functions

The operation panel of the Sourze A500/A500S frequency inverter is equipped with comprehensive control and display functions. Its interface is composed of the following elements:

Indicator Light Area:

• Unit Indicator Lights (Hz/A/V/RPM/%): Display the current parameter units.
• Running Status Indicator Light (RUN): Green indicates the running state.
• Control Mode Indicator Light (L/D/C): Red indicates the current control mode (panel/terminal/communication).
• Direction Indicator Lights (FWD/REV): Red indicates the forward/reverse running states.

Digital Display Area: A 5-digit LED display that can show the set frequency, output frequency, monitoring data, and alarm codes.

Keyboard Buttons:

• PRG/ESC: Enter/exit the menu.
• ENTER: Confirmation key.
• +/-: Data increment/decrement.
• >: Cycle through displayed parameters.
• RUN: Running key.
• STOP/RESET: Stop/reset key.
• QUICK/JOG: Jog running/direction key.

2. Restoring Factory Parameters

Parameters can be initialized using function code A0-28:

• Enter parameter A0-28 (parameter initialization operation).
• Set it to 1: Restore factory parameters (excluding motor parameters, recorded information, and A0-20).
• Press the ENTER key to confirm and execute.
• The system will automatically return after completion.

3. Password Setting and Management

Setting a Password:

• Enter A7-50 (user password).
• Set it to a non-zero number (e.g., 12345).
• The password protection will take effect after returning to the status interface.

After Password Protection is Activated:

• Pressing the PRG key will display “—–“.
• The correct password must be entered to view and modify function codes.
• Incorrect entries will keep the display as “—–“.

Clearing the Password:

• Enter the menu using the password.
• Set A7-50 to 0.
• The password protection function will be canceled.

4. Parameter Access Restriction Settings

Parameter read-only mode can be set using function code E0-00:

• Enter E0-00 (function code read-only selection).
• Set it to 1: All function codes except E0-00 can only be viewed but not modified, preventing accidental parameter changes.

II. External Terminal Control and Speed Adjustment Settings

1. External Terminal Forward/Reverse Control

Hardware Wiring:

• Forward signal: Connect to the X(DI)2 terminal (default FWD function).
• Reverse signal: Connect to the X(DI)4 terminal (default REV function).
• Common terminal: COM terminal.
• 24V power supply: Provides power for external switches (optional).

Parameter Settings:

• A0-04 = 1: Select the terminal command channel.
• A5-01 = 1: Set X2(DI2) for forward running.
• A5-03 = 2: Set X4(DI4) for reverse running.
• A5-11 = 0: Select two-wire operation mode 1.

Control Logic:

• SW1 closed: Forward running.
• SW2 closed: Reverse running.
• Both closed or open: Stop running.

2. External Potentiometer Speed Adjustment

Hardware Wiring:

• Connect the three terminals of the potentiometer as follows:
  • Upper terminal: +10V.
  • Sliding terminal: AI1.
  • Lower terminal: GND.
• Recommended potentiometer resistance: 1-5kΩ.

Parameter Settings:

• A0-06 = 2: Select AI1 as the main frequency source.
• A5-15 = 0.00V: Minimum input value for AI1.
• A5-16 = 0.0%: Corresponding to 0.0%.
• A5-17 = 10.00V: Maximum input value for AI1.
• A5-18 = 100.0%: Corresponding to 100.0%.

Calibration Adjustment:

• If the actual speed does not match the potentiometer position, adjust A5-15 to A5-18.
• Different AI curve characteristics can be selected via A5-45.

III. Fault Diagnosis and Handling

1. Common Fault Codes and Solutions

Fault Code	Fault Name	Possible Causes	Solutions
Err12	Undervoltage Fault	Input power voltage too low	Check if the power voltage is within the allowable range (±20%)
Err14	Motor Overload	Excessive load or short acceleration time	Check the mechanical load and adjust the acceleration time in A0-23
Err20	Ground Short Circuit	Motor or cable insulation damage	Disconnect the inverter and check the motor insulation resistance (should be ≥5MΩ)
Err23	Input Phase Loss	Three-phase input phase loss	Check the input power wiring
Err24	Output Phase Loss	Motor or output cable fault	Check the output wiring and motor
Err27	Communication Fault	Communication interruption or format error	Check the communication line and confirm the settings in A8-00 to A8-05
Err28	External Fault	External fault terminal activation	Check the external fault signal source
Err29	Excessive Speed Deviation	Load突变 (sudden change) or inaccurate motor parameters	Retune the motor (A1-00 = 2)

2. Fault Reset Methods

• Panel Reset: Use the STOP/RESET key.
• Terminal Reset: Set any X(DI) terminal function to 9 (fault reset).
• Automatic Reset: Set A9-11 (number of fault automatic resets) and A9-13 (reset interval time).

3. Fault Record Inquiry

Historical fault records can be viewed through the U0 group parameters:

• U0-00 to U0-03: The last 4 fault codes.
• U0-04 to U0-07: Corresponding running frequencies at the time of the faults.
• U0-08 to U0-11: Corresponding output currents at the time of the faults.
• U0-12 to U0-15: Corresponding DC bus voltages at the time of the faults.

IV. Advanced Function Applications

1. Multi-Speed Control

Setting Steps:

• A0-06 = 4: Select multi-speed as the frequency source.
• Set AC-00 to AC-15: Define 16 speed frequency values.
• Allocate X(DI) functions: Set A5-00 to A5-04 to 12 to 15 (multi-speed terminals 1 to 4).

Combination Control:

• Through 4 DI terminals, 16 states can be combined (binary 0000 to 1111).
• Each state corresponds to one of the frequency values in AC-00 to AC-15.

2. PID Control Application

Basic Settings:

• A0-06 = 6: Select PID as the frequency source.
• AA-00: Select the PID setpoint source (e.g., AI1).
• AA-03: Select the PID feedback source (e.g., AI2).
• AA-04: Set the PID action direction (0 for positive, 1 for negative).

Parameter Adjustment:

• AA-06: Proportional gain (increase to speed up response).
• AA-07: Integral time (decrease to eliminate steady-state error).
• AA-08: Derivative time (improve dynamic characteristics).

3. Frequency Sweep Function

Suitable for the textile and chemical fiber industries:

• Ab-00 = 0: Sweep amplitude relative to the center frequency.
• Ab-01 = 30.0%: Set the sweep amplitude.
• Ab-03 = 10.0s: Set the sweep frequency period.
• Ab-04 = 50.0%: Triangular wave rise time coefficient.

V. Maintenance and Upkeep

1. Daily Inspection Items

• Check for abnormal motor running sounds.
• Check motor vibration.
• Check the operation status of the inverter’s cooling fan.
• Check for overheating of the inverter.

2. Regular Maintenance

• Clean the air duct dust every 3 months.
• Check the tightness of screws.
• Check the wiring terminals for arc traces.
• Use a 500V megohmmeter to test the main circuit insulation (disconnect the inverter).

3. Replacement Cycles for Wear Parts

• Cooling fan: 2-3 years (depending on the usage environment).
• Electrolytic capacitor: 4-5 years.

4. Long-Term Storage Precautions

• Store in the original packaging.
• Power on every 2 years (for at least 5 hours).
• The input voltage should be raised slowly to the rated value.

Conclusion

The Sourze A500 series frequency inverter is powerful and flexible, capable of meeting various industrial application requirements through reasonable settings. This guide provides a detailed introduction to the entire process, from basic operations to advanced applications. It is recommended that users carefully read the relevant sections of the manual before use, especially the safety precautions. For complex application scenarios, it is advisable to contact the manufacturer’s technical support for professional guidance.

1. Operation Panel Functions and Parameter Settings
   1.1 Operation Panel Features

The YTA/YTB series features a 4-digit LED display panel with:

Status indicators‌: RUN (operation), STOP (stop), CTC (timer/counter), REV (reverse)
Function keys‌:
FUNC: Parameter setting
PROC: Parameter save
▲/▼: Frequency adjustment
FWD/REV: Forward/reverse control
STOP/RESET: Stop/reset
1.2 Password Protection and Parameter Initialization

Password Setup‌:

Press FUNC to enter parameter mode
Set D001 parameter (user password) to 1 for unlocking
Restore to 0 after modification to lock parameters

Factory Reset‌:

Unlock parameters (D001=1)
Locate D176 parameter (factory reset)
Set to 1 and press PROC to execute initialization

2. External Control Implementation
   2.1 External Terminal Forward/Reverse Control

Wiring‌:

Forward: Connect FWD terminal to COM
Reverse: Connect REV terminal to COM
Common: COM terminal

Parameter Settings‌:

D032=1 (external terminal control)
D096=0 (FWD for forward/stop, REV for reverse/stop)
D036=2 (allow bidirectional operation)
D097 sets direction change delay (default 0.5s)
2.2 External Potentiometer Speed Control

Wiring‌:

Potentiometer connections:
Ends to +10V and COM
Wiper to AVI terminal
AVI range selection via DIP switch (0-5V or 0-10V)

Parameter Configuration‌:

D031=1 (frequency source from AVI)
Match potentiometer output range with DIP switch
Set D091-D095 for analog-frequency mapping

3. Fault Diagnosis and Solutions
   3.1 Common Error Codes
   Code Meaning Solution
   Eo/EoCA Overcurrent Increase acceleration time (D011)
   EoCn Running overcurrent Check load/motor condition
   EoU Overvoltage Extend deceleration time (D012)
   EoL Overload Reduce load or increase capacity
   ELU Undervoltage Check power supply voltage
   3.2 Maintenance Guidelines

Regular Checks‌:

Clean heat sinks and vents every 3 months
Verify terminal tightness
Monitor operating current
Record fault history (D170-D172)

4. Advanced Functions
   4.1 PLC Programmable Operation

Configuration‌:

D120=1/2/3 (select single/cyclic/controlled cycle)
D122-D136 set segment speeds
D141-D156 set segment durations
D137/D138 set direction for segments
4.2 PID Closed-loop Control

Setup‌:

D070=1 (enable PID)
D072-D074 set P/I/D parameters
Connect feedback signal to ACI terminal (4-20mA)
Set target value via AVI or panel
4.3 RS485 Communication

Parameters‌:

D160: Station address (1-254)
D161: Baud rate (4800-38400bps)
D163: Communication format (8N2 RTU mode)

This guide covers all operational aspects from basic controls to advanced applications of Yuchao YTA/YTB series inverters. For complex issues, please contact us.