Category: Electrical Equipment Manuals

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Operation Manual and User Guide for Shihlin VFD SS Series

I. Description of Operation Panel Functions and Process for Restoring Factory Default Settings

  1. Description of Operation Panel Functions

The operation panel of Shihlin VFD SS series is powerful, facilitating user settings and monitoring. The operation panel mainly includes the following function keys and indicators:

RUN/STOP Key: Used to start and stop the VFD.
Frequency Adjustment Knob: Used to manually adjust the output frequency of the VFD.
Mode Switch Key: Used to switch between different operation modes, such as PU mode, JOG mode, external mode, etc.
Monitor/Set Key: Used to switch between monitor mode and set mode.
LED Indicators: Including running indicator, frequency monitor indicator, voltage monitor indicator, etc., used to indicate the current status of the VFD.

  1. Process for Restoring Factory Default Settings

If you need to restore the VFD parameters to their factory defaults, follow these steps:

Switch to Monitor Mode: Press the Monitor/Set key to ensure the VFD is in monitor mode.
Read Parameter Pr998: Enter the parameter setting mode on the operation panel, find parameter Pr998, and read its current value.
Write Parameter Pr998: Write the read Pr998 value again. At this point, the VFD will automatically initialize the parameters, and all parameters will be restored to their factory defaults.
Restart the VFD: To ensure the parameters are successfully restored, it is recommended to restart the VFD.

Shilin VFD SS series operation panel DU01

II. Terminal Start and External Potentiometer Speed Adjustment Wiring and Parameter Debugging

  1. Terminal Start Wiring and Parameter Debugging

If you need to start the VFD via terminal, you need to connect the external control signal to the corresponding control terminal of the VFD. Taking the STF (forward start) terminal as an example, the wiring and parameter debugging process is as follows:

Wiring: Connect the positive pole of the external control signal to the STF terminal, and the negative pole to the common terminal SD.
Parameter Settings:
Enter the parameter setting mode, set Pr79 to 2 (external mode).
Set parameters such as start frequency (Pr13) and upper limit frequency (Pr1) as needed.
Ensure that the STF terminal function is correctly set (default is forward start function).

  1. External Potentiometer Speed Adjustment Wiring and Parameter Debugging

If you need to adjust the output frequency of the VFD through an external potentiometer, you need to connect the output signal of the potentiometer to the analog signal input terminal of the VFD. Taking a 0~10V voltage signal as an example, the wiring and parameter debugging process is as follows:

Wiring: Connect the positive output of the potentiometer to the AI1 (2-5) terminal of the VFD, and the negative output to the common terminal GND.
Parameter Settings:
Enter the parameter setting mode, set Pr73 to 1 (select 0~10V voltage signal input range).
Set Pr38 to the desired voltage-frequency conversion relationship, for example, when the potentiometer outputs 10V, the VFD outputs a frequency of 50Hz.
Set Pr79 to a suitable operation mode, such as external mode or mixed mode.
Ensure that other relevant parameters (such as acceleration and deceleration time, torque compensation, etc.) have been set according to actual needs.

Shilin VFD SS series wiring diagram

III. Analysis and Solutions for Fault Alarms

The Shihlin VFD SS series may encounter various fault alarms during operation. Below are some common fault alarm codes, their analysis, and solutions:

ERR (Error):
Cause: May be caused by insufficient power supply voltage, the RESET terminal being connected, poor contact between the operator and the main unit, internal circuit failure, or CPU malfunction.
Solution: Check if the power supply voltage is normal; disconnect the reset switch; ensure good connection between the operator and the main unit; if the problem persists, the VFD may need to be replaced or restarted.
OC1 (Overcurrent During Acceleration), OC3 (Overcurrent During Deceleration):
Cause: Usually caused by excessive load, too short acceleration/deceleration time, or abnormal regenerative braking resistor.
Solution: Check if the load is excessive and reduce it appropriately; extend the acceleration/deceleration time; check if the regenerative braking resistor is connected properly and has the correct resistance.
OV2 (Overvoltage at Constant Speed):
Cause: May be caused by excessive voltage between terminals P-N.
Solution: Check if a regenerative braking resistor is connected between terminals P-PR and if the connection is normal; if regenerative function is not needed, short-circuit between P-PR.
THT (IGBT Module Overheat):
Cause: The IGBT module temperature is too high.
Solution: Check if the ambient temperature around the VFD is too high; ensure good heat dissipation of the VFD; check if the setting of the electronic thermal relay capacity is reasonable.
BE (Brake Transistor Abnormal):
Cause: External motor thermal relay actuation.
Solution: Check if the capacity of the external thermal relay matches the motor capacity; reduce the load to avoid frequent actuation of the thermal relay.

By carefully reading this user manual and following the above operation guide, users can better understand and use the Shihlin VFD SS series, ensuring normal operation and efficient working of the equipment.

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Key Points of Yufeng Inverter YF6800B Manual: Overview of Operation Methods, Terminal Start-up, External Potentiometer Speed Control Settings (with Specific Parameters), Fault Diagnosis and Resolution.

YF6800B Series Yufeng Inverter Manual Key Points Introduction

I. Operation Overview

The Yufeng Inverter YF6800B series boasts a straightforward operation process, primarily encompassing power-on/off and parameter settings. Upon powering on, ensure a stable power supply before initiating the inverter through the start button on the control panel or remote signals. To power off, first halt motor operation via the control panel or remote signals before cutting off the inverter’s power supply for device safety. Regarding parameter settings, users can navigate through the control panel’s buttons or connect to a computer using dedicated software to access the parameter setting mode, enabling precise adjustments to key parameters such as frequency, voltage, and current limits to meet diverse operational demands across various working conditions.

II. Terminal Start Configuration Method

Terminal start represents a commonly utilized control method for inverters, with its setup process encompassing wiring and parameter configuration.

  1. Wiring: Adhere to the wiring diagram outlined in the manual, connecting the inverter’s RUN (operate) and STOP (halt) terminals to the corresponding output terminals of external control devices like PLCs or buttons. Ensure secure and reliable connections, avoiding looseness or short circuits.
  2. Parameter Configuration: Navigate to the terminal control-related options within the inverter’s parameter settings to activate terminal control mode. Specific parameter configurations may include:
    • Input Point Function Configuration: Assign the RUN and STOP terminals’ corresponding input points to control start and stop operations, respectively.
    • Multi-speed Configuration (if applicable): Configure additional input points to correspond with distinct speed segments for multi-speed control.
    • Forward/Reverse Configuration (if required): Establish forward and reverse control logic to ensure the motor rotates in the anticipated direction.

III. External Potentiometer Speed Regulation Configuration Method

External potentiometer speed regulation offers a simple and intuitive means of speed adjustment, also encompassing wiring and parameter configuration.

  1. Wiring: Connect the external potentiometer’s output terminal to the inverter’s analog input terminal (e.g., AI1), with the potentiometer’s ends respectively wired to power and ground, forming a complete circuit. Select an appropriate power supply voltage and potentiometer resistance range to ensure precision and stability in speed regulation.
  2. Parameter Configuration: Locate the analog input-related options within the inverter’s parameter settings for the following configurations:
    • Input Source Configuration: Assign AI1 as the speed reference source.
    • Input Range Configuration: Match the inverter’s input range with the potentiometer’s output range.
    • Gain Configuration: Adjust the gain parameter to alter speed regulation sensitivity, facilitating smooth motor speed adjustment according to the potentiometer’s output.

IV. Fault Diagnosis and Resolution Methods

During the utilization of the Yufeng Inverter YF6800B, various faults may arise. Below are some common faults and their corresponding diagnosis and resolution methods:

  1. Overcurrent Protection: Inspect if the motor and load are excessively large or short-circuited, adjusting the load or replacing the motor as necessary. Additionally, verify if the inverter’s output current settings are reasonable.
  2. Overvoltage/Undervoltage Protection: Check if the input power supply voltage remains stable within the specified range. If voltage fluctuations are significant, implement voltage stabilization measures.
  3. Overheat Protection: Ensure the inverter’s cooling fan operates normally, cleaning dust and debris from the heat sink. If the ambient temperature is excessively high, adopt cooling measures.
  4. Communication Failure: Verify the secure and reliable connection of communication lines, along with accurate communication parameter settings. Attempt to restore communication by re-powering or restarting the device.
  5. Control Malfunction: Inspect if the control signal input is accurate and the control logic aligns with the set requirements. For complex control logic, utilize professional tools for fault location and analysis.

By adopting these methods, users can swiftly diagnose and resolve faults encountered during inverter operation, ensuring safe and stable device functioning.

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Mitsubishi E700(E720,E740) Inverter Operation Guide: Terminal Start, Potentiometer Speed Control, and Fault Handling

Mitsubishi E700 Inverter Operation Guide: Terminal Start, Potentiometer Speed Control, and Fault Handling

The Mitsubishi E700 series inverter is widely used in various industrial control applications due to its high performance and reliability. This guide aims to introduce the terminal start method, potentiometer frequency control, and analyze common fault codes and their solutions for this series of inverters.

Mitsubishi Inverter E700 Series Terminal Control Mode Wiring Diagram

I. Terminal Start Method
The terminal start function of the Mitsubishi E700 inverter allows users to control the inverter’s start and stop via external signals. Here are the basic steps to achieve terminal start:

Set the Pr.79 Operation Mode Selection Parameter:
Adjust the Pr.79 parameter to the appropriate operating mode for external control. For example, setting it to “2” puts the inverter in external operation mode, while “3” allows joint control via the operation panel and external signals.
Wiring:
Connect the STF (forward start signal) and STR (reverse start signal) terminals to the external control device. These signals are usually dry contact signals that initiate forward or reverse rotation when they are ON.
Ensure the voltage level of the control circuit matches the inverter’s requirements.
Testing and Debugging:
After wiring and parameter settings, conduct functional tests to ensure the inverter responds correctly to external start signals.
II. Potentiometer Frequency Control
The Mitsubishi E700 inverter supports frequency adjustment via an external potentiometer, allowing for motor speed control. Here’s how to achieve it:

Parameter Settings:
Set the Pr.73 Analog Input Selection parameter to allow terminal 2 or 4 to receive analog signals (based on the inverter model and configuration).
Set Pr.161 to “1” to enable the M knob as a potentiometer mode, allowing frequency adjustment through rotating the M knob or an external potentiometer.
Wiring:
Connect the potentiometer’s output signal to the corresponding analog input terminal of the inverter (e.g., terminal 2 or 4).
Adjust the analog input gain and offset parameters (such as Pr.125 and C2) according to the potentiometer’s resistance range and output voltage/current range.
Debugging:
Rotate the potentiometer and observe the inverter’s output frequency changes to ensure the speed control function works properly.
III. Fault Codes and Solutions
During operation, the Mitsubishi E700 inverter may encounter various faults, displaying corresponding error codes. Here are some common fault codes and their solutions:

E.OC1 (Overcurrent During Acceleration):
Cause: Motor stall, too short acceleration time setting, or improper motor capacity selection.
Solution: Check the motor and load for abnormalities, extend the acceleration time, and adjust the motor capacity selection.
E.OV1 (Regenerative Overvoltage During Acceleration):
Cause: Excessive regenerative energy generated during motor deceleration, causing high DC bus voltage in the inverter.
Solution: Extend the deceleration time, enable the regenerative braking function (e.g., connect braking resistors or braking units).
E.THT (Inverter Overload):
Cause: Heavy load, high ambient temperature, or poor heat dissipation.
Solution: Reduce the load, improve heat dissipation conditions, or increase the inverter capacity.
E.OC3 (Overcurrent During Deceleration):
Cause: High load inertia during deceleration, too short deceleration time setting.
Solution: Extend the deceleration time or enable the regenerative braking function.
Er1 (Write Prohibited Error):
Cause: Attempting to modify parameters while writes are prohibited.
Solution: Check the Pr.77 Parameter Write Selection setting to ensure parameter writes are allowed.
By mastering the terminal start, potentiometer speed control functions, and fault handling methods of the Mitsubishi E700 inverter, you can effectively enhance equipment efficiency, stability, and reduce maintenance costs. We hope this guide aids you in using the Mitsubishi E700 series inverter.

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Maintenance and Care Guidelines for NETZSCH TG209 Thermogravimetric Analyzer Ensuring Optimal Performance and Longevity

Maintenance and Care for NETZSCH TG209 Thermogravimetric Analyzer: Ensuring Long-Term Stability and Measurement Accuracy

Physical picture of the NIO TG209 thermogravimetric analyzer

Maintaining and caring for the NETZSCH TG209 Thermogravimetric Analyzer is crucial to ensure its long-term stability and measurement accuracy. Here are some key steps and considerations for proper maintenance:

I. Daily Cleaning

  1. Cleaning Sample Pans: Keep sample pans clean before and after each measurement. Use air blowing or appropriate cleaning solutions to clean them, ensuring samples are not damaged.
  2. Cleaning Temperature Controller: Regularly clean the temperature controller with cleaning solutions or air blowing to ensure accurate temperature settings.
  3. Cleaning Computer: Clean the computer’s internal and external components, as well as input/output devices, at least once a year.
Dismantling and Cleaning Diagram of Naichi TG209 Thermogravimetric Analyzer

II. Component Inspection and Replacement

  1. Inspecting Accessories: Regularly inspect the analyzer’s accessories, such as heating elements, controllers, and temperature sensors, to ensure they are in good condition. Replace any aged or damaged components promptly.
  2. Replacing Filters: Based on usage, regularly replace oil absorption filters, filter elements, and gas filters to prevent contaminants from affecting measurement results.
  3. Checking and Replacing Sealing Rings: Regularly inspect the main unit and analyzer for any oil leaks. Replace sealing rings or gaskets if necessary.
Actual calibration diagram of thermogravimetric analyzer

III. Software and System Settings

  1. Software Updates: Keep the analyzer’s control software up to date to utilize the latest features and bug fixes.
  2. System Configuration: Ensure all system settings, such as temperature range and heating rate, are correctly configured to meet experimental requirements.

IV. Regular Maintenance

  1. Professional Maintenance: Request regular maintenance services from NETZSCH or authorized service centers, including deep cleaning, calibration, and performance checks.
  2. Long-Term Storage: If the analyzer will not be used for an extended period, follow the manufacturer’s recommendations for storage and maintenance to prevent component aging and damage.

V. Operational Considerations

  1. Sample Preparation: Ensure samples are uniform powders, and sample pans are dry to reduce measurement errors.
  2. Operational Procedures: Follow the NETZSCH TG209 Thermogravimetric Analyzer’s operating procedures and safety guidelines to ensure operator and equipment safety.
  3. Maintenance Logs: Establish a maintenance log to record the time, content, and replaced components of each maintenance activity, allowing for tracking of the equipment’s maintenance history and performance changes.

VI. Specific Maintenance Tasks

  1. Cleaning Support Rods: After prolonged use, support rods may accumulate residue from sample decomposition, affecting test accuracy. Regularly burn support rods in air or oxygen atmospheres at high temperatures to remove residue (typically once a week, depending on sampling frequency and instrument contamination).
  2. Furnace Maintenance: For models like the NETZSCH TG209F1 with ceramic furnaces, pay special attention to the furnace’s corrosion resistance and sealing. Regularly inspect the furnace for cracks or damage and repair promptly.

By considering these aspects of daily cleaning, component inspection and replacement, software and system settings, regular maintenance, operational considerations, and specific maintenance tasks, you can ensure the long-term stability and measurement accuracy of your NETZSCH TG209 Thermogravimetric Analyzer.

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Difuss DR5 Series Motor Soft Starter: External Terminal Control Operation and Fault Code Handling Methods

Difuss DR5 Series Motor Soft Starter: External Terminal Control Operation and Fault Code Handling Methods

Introduction

The Difuss DR5 Series Motor Soft Starter is an advanced device specifically designed for smooth motor startup and shutdown, widely applied in industrial automation. This article delves into the operational methods for external terminal control and outlines the fault codes along with their corresponding handling procedures, facilitating users in better utilizing and maintaining this equipment.

DR5 series Defuss soft start main circuit wiring diagram

I. External Terminal Control Operation Methods

1. External Terminal Configuration

The DR5 Series Soft Starter offers an extensive range of external terminal interfaces for remote control and status feedback. Users should connect external control signals (such as start, stop, reset, etc.) to the corresponding terminals based on their actual needs. Refer to the wiring diagram in the device’s manual for specific terminal configuration.

2. Start Operation

  • Power On: First, ensure that the power supply to the soft starter is correctly connected, and the motor wiring is accurate.
  • External Start Signal: Send a start signal (typically a normally open contact closure) to the start terminal of the soft starter. Subsequently, the soft starter will initiate the predefined start sequence, smoothly initiating motor rotation.

3. Stop Operation

  • External Stop Signal: Transmit a stop signal (also typically a normally open contact closure) to the stop terminal of the soft starter. The soft starter will then gradually reduce the motor’s speed to a stop, following the configured stop mode (e.g., free coasting, soft stop).

4. Reset Operation

  • Fault Reset: When the soft starter stops due to a fault, address the fault source first. Then, send a reset signal (either a pulse signal or a sustained closure signal) to the reset terminal to restore the soft starter to its normal state.

II. Fault Codes and Handling Methods

1. Common Fault Codes

During operation, the DR5 Series Soft Starter may encounter various faults, with corresponding fault codes displayed on its screen. Here are some common fault codes and their possible causes:

  • F01: Overcurrent Fault. It could be caused by excessive motor load or incorrect motor parameter settings.
  • F02: Overload Fault. The motor has been operating in an overloaded state for an extended period.
  • F03: Overheat Fault. The internal temperature of the soft starter is too high, potentially due to poor heat dissipation or a high ambient temperature.
  • F04: Phase Loss Fault. The input power supply or motor is missing one or more phases.
  • F05: Communication Fault. Communication with the host computer or remote control system has been interrupted.

2. Handling Methods

  • Check Power Supply and Motor: Verify that the input power supply is normal, the motor wiring is accurate, and there are no short circuits or open circuits.
  • Adjust Parameters: Adjust the relevant settings of the soft starter, such as startup time and stop mode, according to the actual motor parameters.
  • Improve Heat Dissipation: Clean dust around the soft starter, ensure proper ventilation, and reduce the ambient temperature.
  • Check Communication Lines: Inspect the communication lines with the host computer or remote control system to ensure stable and reliable connections.
  • Restart the Device: After addressing the fault and resetting, attempt to restart the soft starter to observe whether it returns to normal operation.

Conclusion

The Difuss DR5 Series Motor Soft Starter is a powerful and user-friendly motor control device. By correctly configuring the external terminals, mastering operational methods, and promptly handling fault codes, users can fully leverage its performance advantages, achieving smooth motor startup and shutdown while enhancing production efficiency and equipment safety. We hope this article provides valuable guidance for users in utilizing and maintaining the DR5 Series Soft Starter.