There are 2 wiring options; the wiring is determined by the grid voltage. The motor voltage should be ≤ Grid voltage (See Image 2).
Star: Connect the starting or finishing ends of three coils together to form the neutral point. A common wire, Neutral is taken out from the neutral point.
Delta: Delta winding allows third-harmonic currents to circulate within the transformer, and prevents third-harmonic currents from flowing in the supply line. Delta connected windings are not commonly used for higher transmission voltages (138 kV & above).
Important wiring guidelines:
The following image shows you how to use the VFD Keypad.
P02.01 – Rated power of asynchronous motor [KW].
P02.02 – Rated frequency of asynchronous motor
P02.03 – Rated speed of asynchronous motor [RPM]
P02.04 – Rated voltage of asynchronous motor [V] P02.05 – Rated current of asynchronous motor [A]
Set the Run command channel source
The VFD offers 3 ways to select the RUN command:
· Keypad- set P00.01 to 0.
· Terminal- set P00.01 to 1 MODBUS- set P00.01 to 2
Frequency is set via P00.06.
Change the frequency via:
1. Keypad- set P00.06 to 0 Keypad Arrows.
2. Terminal*- set P00.06 to 1 potentiometer wheel from keypad.
3. MODBUS- set P00.06 to 8 via RS485. Note - Frequency can be also controlled via Analog , high speed input etc...
Motor parameter autotuning is required when using sensorless vector mode. (P00.00 = 0 or 1)
Autotuning is set via P00.15
0: No operation.
1: Rotating autotuning Comprehensive motor parameter autotune. It is recommended to use rotating autotuning when high control accuracy is needed.
2: Static autotuning 1 (autotune totally) It is suitable in the cases when the motor cannot de-couple from the load. The autotuning for the motor parameter will impact the control accuracy.
3: Static autotuning 2 (autotune part parameters); when the current motor is motor 1, autotune P02.06, P02.07, P02.08
Modify these parameters according to your requirements:
1. Set P14.00 (local communication address) to the inverter ID number (1 -247)
2. P14.01 (communication baud ratio)
3. P14.02 (Digital bit checkout).
Note - Default settings: ID=1, Baud rate=19200, Digital bit checkout =Even, 8, 1
The same baud rate and digital bit should be configured in the VFD Properties in UniLogic/VisiLgoic.
In case you wish to send commands to the VFD via the terminal (IO) connect the PLC digital outputs to the VFD digital inputs (S1-4).
Note- the connection can be wired as Source or Sink (default).
Use a U-shaped contact tag to set NPN or PNP mode, and the internal or external power supply. The default setting is NPN internal mode.
Image 3 *
Image3 example for UMI-B1 UL Series.
· Forward - P05.01 (S1 terminals selection) to 1.
· Reverse - P05.02 (S2 terminals selection) to 2.
· Forward jogging - P05.03 (S3 terminals selection) to 4.
· Reverse jogging - P05.04 (S4 terminals selection) to 5.
Note - The terminal selection can be modified. For more options, please see VFD User manual.
To restore factory defaults, write the value 1 to P00.18.
Please note that:
1. The motor parameters in group will not reset.
2. The communication parameters will reset only after power up.