FAQs
What is the difference between Delta VFD MS300 and ME300?
The MS300 offers more control features such as built-in PLC (5k steps), sensorless vector control, and STO safety. The ME300 is ultra-compact, lacks STO and PLC features, but includes a built-in EMC filter and is ideal for tight-panel OEM installations.
How do I set the frequency on a Delta VFD using the keypad?
To set the frequency:
- Press the MODE button
- Navigate to P00.00 (Frequency Command Source)
- Set to 01 for keypad input
- Return to the main screen and use the UP/DOWN arrows to change frequency.
Can Delta VFDs run both induction motors and permanent magnet motors?
Yes. Most Delta drives like MS300 and MH300 support both IM (Induction Motors) and PM (Permanent Magnet Motors) using sensorless vector or encoder feedback control.
What is the overload capacity of Delta MH300 VFD?
Delta MH300 supports 200% of rated current for 3 seconds and 150% for 60 seconds, making it suitable for high-torque and cyclic load applications.
Do Delta VFDs support RS-485 and Modbus communication?
Yes. Delta VFDs come with built-in RS-485 communication and support Modbus RTU protocol by default. Models like MS300 and MH300 also support CANopen, with optional cards for Ethernet/IP and Profibus.
Are Delta VFDs CE, UL, and RoHS certified?
Yes. Most Delta drives are CE, UL, cUL, and RoHS compliant, making them suitable for global industrial standards and exports.
How to connect a braking resistor to a Delta VFD?
- Use the + and B terminals on the VFD
- Ensure the brake resistor value and wattage match the VFD specs
- No external brake unit is needed for MS300/ME300 (as they have built-in chopper)
What is the IP rating of Delta MS300?
The MS300 is IP20 rated. It should be mounted inside a panel enclosure for dust and water protection.
Can I use a Delta VFD for a 415V 3-phase submersible pump?
Yes, as long as the VFD output rating matches the motor kW, voltage, and current. Models like MS300 and C2000 are commonly used for pumps with overload protection and PID features.
How to reset fault codes on a Delta VFD?
- Press STOP/RESET on the keypad
- Or power cycle the VFD after removing the fault cause
- For permanent reset via input, assign a digital input to parameter reset (e.g., P05.xx)