I. Introduction to Inverter Panel Functions and Basic Operations
1. Panel Function Introduction
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The RMSPD INVERTER SPD990M Mini is equipped with an LED operation panel that primarily includes the following function keys:
- Shift Key: Used to select digits for modification when editing data.
- Multi-function Key: Function set by parameter F8.04, defaulting to Jog.
- Analog Potentiometer: Used for frequency setting.
- Programming Key: Enters or exits the programming mode.
- Increment/Decrement Keys: Adjusts data or function codes.
- Confirm Key: Enters the next menu level or confirms data.
- Run Key: Starts the inverter.
- Stop/Reset Key: Stops the inverter or resets faults.
2. Resetting to Factory Defaults
To reset the inverter to its factory settings, follow these steps:
- Enter the programming mode (press the programming key).
- Use the shift and increment/decrement keys to select function code F8.03.
- Press the confirm key to enter F8.03 settings and select “1” for factory reset.
- Press the confirm key again to save and exit.
3. Starting, Stopping, and Adjusting Frequency via Panel
- Starting: Press the run key to start the inverter.
- Stopping: Press the stop key to stop the inverter.
- Frequency Adjustment: Use the analog potentiometer or increment/decrement keys to adjust the output frequency.
4. Terminal Forward/Reverse Control and External Potentiometer Frequency Setting
- Forward/Reverse Control: Control via terminals X1 (forward) and X2 (reverse), requiring F2.13 and F2.14 to be set to corresponding functions.
- External Potentiometer Frequency Setting: Connect to the AVI terminal and set F0.03 to 3 (AVI analog input).
II. PID Function Control for a Single Water Pump Motor
1. PID Function Wiring and Parameter Settings
- Wiring: Connect the PID feedback signal to the AVI or ACI terminal.
- Parameter Settings:
- F3.00: Enable PID regulation, selecting appropriate input and feedback channels.
- F3.01: Set the PID setpoint.
- F3.02: Adjust the feedback channel gain.
- F3.03 and F3.04: Set the proportional gain (P) and integral time (Ti).
2. Sleep Function Settings and Wake-up
- Sleep Settings:
- F3.10 and F3.11: Set sleep and wake-up threshold coefficients.
- F3.12 and F3.13: Set sleep and wake-up delay times.
- Wake-up: When the feedback value is less than the wake-up threshold, the inverter will automatically wake up.
III. Controlling the Inverter via a Weinview Touchscreen using Modbus Protocol
1. Inverter Settings
- Communication Parameters:
- F6.00: Set the device address.
- F6.01: Configure Modbus communication parameters (baud rate, data format, etc.).
- Control Commands:
- Use function code 06 to write control commands to address 2002H for inverter forward/reverse and stop control.
- Read and write frequencies to address 2001H.
2. Reading Alarm Values
- Use function code 03 to read alarm codes starting from address 2100H.
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IV. Fault Code Meanings and Solutions
Fault Code | Name | Possible Causes | Solutions |
---|---|---|---|
E0C1 | Overcurrent During Acceleration | Too short acceleration time, undersized inverter | Extend acceleration time, choose a larger inverter |
E0C2 | Overcurrent During Deceleration | Too short deceleration time, undersized inverter | Extend deceleration time, choose a larger inverter |
EHU1 | Overvoltage During Acceleration | Abnormal input voltage | Check the input power supply |
ESC1 | Power Module Fault | Output short circuit, control board malfunction | Check motor wiring, contact the manufacturer for service |
EOL1 | Inverter Overload | Improper V/F curve settings, heavy load | Adjust V/F curve, choose a larger inverter |
V. Conclusion
The Shanghai RMSPD INVERTER SPD990M Mini is a powerful and easy-to-use variable frequency drive. Basic start, stop, and frequency adjustment can be achieved through the panel. Terminal control enables forward/reverse operation and analog frequency adjustment. PID functionality allows for closed-loop control of water pump motors. Communication with an upper computer can be facilitated via the Modbus protocol. In the event of a fault, referring to the fault code table can quickly identify the issue and take appropriate measures. We hope this guide assists users in better utilizing and maintaining the SPD990M Inverter.