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User Manual and Operating Guide for Hitachi Inverter SJ300


I. Basic Operation and Monitoring Functions

  1. Panel Setting and Monitoring
    Setting to Display Current, Bus Voltage, and Frequency

Display Current: First, enter the monitoring mode via the panel buttons (typically by selecting the monitoring mode with the “FUNC” key). In monitoring mode, use the up and down arrow keys to browse through different monitoring parameters, find the current monitoring item, and confirm.
Display Bus Voltage: Similarly, in monitoring mode, use the up and down arrow keys to find the bus voltage monitoring item and confirm.
Display Frequency: Frequency is one of the most commonly used monitoring parameters and is usually directly displayed on the main interface of the monitoring mode. If not displayed, select the frequency monitoring item with the arrow keys.
Monitoring Terminal Status

Enter monitoring mode, then select “Smart Input Terminal Status” or “Smart Output Terminal Status” for monitoring. These statuses include the switching state of the terminals, signal voltage, etc.
Panel Start/Stop and Speed Adjustment

Functional diagram of the operation panel for Hitachi inverter SJ300.

Start and Stop: In standard setting mode, start the inverter with the “RUN” key and stop it with the “STOP/RESET” key.
Speed Adjustment: Speed adjustment is typically achieved by changing the frequency setting value. On the panel, use the up and down arrow keys to adjust the frequency setting value, then press the “Store” key to confirm.
II. Multi-Speed Function Setting

  1. Setting Multi-Speed
    Assuming four speeds are needed, namely 10Hz, 20Hz, 40Hz, and 50Hz, the specific steps are as follows:

Wiring:
Connect external control signals (such as switch signals) to the inverter’s multi-speed control terminals (such as FW, 8, 7, 6, etc.).
Ensure correct connection of the control signal power supply and grounding.
Parameter Setting:
Enter standard setting mode and find parameters related to multi-speed control (such as A038, A039, etc.).
Set A038=00 (indicating external terminal control for multi-speed).
Set A039=04 (indicating 4-speed control).
Set the corresponding frequency values for the four speeds in the “F001” parameter: F001=10Hz (first speed), A020=20Hz (second speed), A220=40Hz (third speed), A320=50Hz (fourth speed).
III. Communication Protocol Setting

Standard wiring diagram for Hitachi inverter SJ300.
  1. Communication with Mitsubishi FX2N Series PLC
    Communication Method: Assuming RS485 communication is used.
    Parameter Setting:
    In the inverter, set C070=03 (select RS485 communication).
    Set C071 to the desired baud rate (e.g., C071=04 for 4800bps).
    Set C072=1 (8 data bits).
    Set C073=7 (no parity check).
    Set C074=0 (1 stop bit).
    On the PLC side, configure the corresponding RS485 communication parameters to match the inverter.
    IV. Simple Analysis and Handling of Fault Codes
  2. Common Fault Codes
    E02: Overcurrent Alarm. Possible causes include excessive motor load, motor stall, etc. Troubleshooting includes checking motor load, checking for motor stall, etc.
    E03: Overload Alarm. Possible causes include the motor operating overloaded for a long time. Troubleshooting includes reducing the load, increasing motor capacity, etc.
    E05: Overvoltage Alarm. Possible causes include excessively high input voltage. Troubleshooting includes checking if the input voltage is normal, adding input voltage protection, etc.
  3. Handling Steps
    Check the Alarm Code: When the inverter alarms, first check the alarm code displayed on the panel.
    Analyze Possible Causes: Based on the alarm code and site conditions, analyze possible fault causes.
    Take Measures: Based on the analysis results, take corresponding troubleshooting measures.
    Reset the Inverter: After troubleshooting, press the “STOP/RESET” key to reset the inverter and restart it.
    V. Summary

The Hitachi Inverter SJ300 series user manual provides detailed operating instructions and parameter setting methods. By carefully reading the manual and following the guidelines, users can easily monitor, control, and troubleshoot the inverter. Particular attention should be paid to correct parameter configuration and wiring accuracy when setting the multi-speed function and communicating with PLCs. Proper use of the inverter can significantly improve the operational efficiency and stability of the motor system.

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Operation Guide for Hitachi Inverter SJH300 Series User Manual

I. Introduction to Operation Panel Functions, Factory Default Reset, and Password Management

The Hitachi Inverter SJH300 series features an intuitive operation panel that integrates various functions for easy configuration and monitoring. The operation panel includes:

Functional Diagram of the Operation Panel for Hitachi Inverter SJH300
  1. Operation Panel Function Introduction:
    • Digital Operator (OPE-S): The standard-equipped digital operator provides a user-friendly interface for setting parameters, monitoring operating conditions, and controlling the inverter. Key functions include setting output frequency, selecting operation direction, and initiating start/stop commands.
    • Monitor Modes: The panel displays various monitor modes, such as output frequency, output current, operation direction, and alarm status, to provide real-time feedback on the inverter’s performance.
  2. Resetting to Factory Defaults:
    • To restore the inverter to its factory default settings, you need to navigate to the appropriate parameter (typically b084) in the function mode and set it to 01 for data initialization or 02 for both trip history clear and data initialization. This action resets all parameters to their default values, effectively restoring the inverter to its out-of-the-box state.
  3. Password Management:
    • Setting a Password: To set a password for parameter access, use the C070 parameter to select the data command mode (e.g., 03 for RS485 communication). Then, configure the relevant communication parameters (such as transmission speed, code, bit, and parity) to establish a secure communication channel.
    • Eliminating a Password: To remove the password, simply reset the C070 parameter to its default value (02 for operator mode), which disables password protection and allows unrestricted access to all parameters.
Standard wiring diagram for Hitachi Inverter SJH300 series.

II. Terminal Start/Stop, Forward/Reverse Control, and External Potentiometer Speed Adjustment

The Hitachi Inverter SJH300 series offers flexible control options, including terminal start/stop, forward/reverse control, and external potentiometer speed adjustment. Here’s how to configure these features:

  1. Terminal Start/Stop and Forward/Reverse Control:
    • Wiring: Connect the start (FW) and stop (RV) terminals to the appropriate control signals. For forward/reverse control, you may need to assign specific intelligent input terminals (e.g., terminals 7, 8 for forward/reverse commands).
    • Parameter Setting:
      • Set A002 to 01 to select terminal operation command.
      • Configure F004 to select the desired operation direction (00 for forward, 01 for reverse).
      • If using intelligent input terminals for forward/reverse control, assign the corresponding terminals (e.g., terminals 7, 8) and set the appropriate function codes (C001-C008).
  2. External Potentiometer Speed Adjustment:
    • Wiring: Connect the external potentiometer (typically a 10kΩ linear potentiometer) across the O-L (0-10V) terminals. Ensure proper grounding and shielding to avoid noise interference.
    • Parameter Setting:
      • Set A001 to 01 to select terminal frequency command.
      • Configure A011 (O start) and A012 (O end) to define the minimum and maximum output frequencies corresponding to the potentiometer’s minimum and maximum resistance values.
      • Adjust A013 (O start rate) and A014 (O end rate) if linear adjustment is not achieved directly with the potentiometer.

By following these steps, you can effectively configure the Hitachi Inverter SJH300 series for terminal-based start/stop and forward/reverse control, as well as external potentiometer speed adjustment, to suit your specific application requirements.