Goodrive350-19 series VFD Operating
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Step 4: Verify whether the encoder is installed and set properly
a) Confirm the encoder direction and parameter setup
Set P20.01 (encoder pulse-per-revolution), set P00.00=2 and P00.10=20Hz, and run the VFD, at this
point, the motor rotates at 20Hz, observe whether the speed measurement value of P18.00 is correct,
if the value is negative, it indicates the encoder direction is reversed, under such situation, set P20.02
to 1; if the speed measurement value deviates greatly, it indicates P20.01 is set improperly. Observe
whether P18.02 (encoder Z pulse count value) fluctuates, if yes, it indicates the encoder suffers
interference or P20.01 is set improperly, requiring you to check the wiring and the shielding layer.
b) Determine Z pulse direction
Set P00.10=20Hz, and set P00.13 (running direction) to forward and reverse direction respectively to
observe whether the difference value of P18.02 is less than 5, if the difference value remains to be
larger than 5 after setting Z pulse reversal function of P20.02, power off and exchange phase A and
phase B of the encoder, and then observe the difference between the value of P18.02 during forward
and reverse rotation. Z pulse direction only affects the forward/reverse positioning precision of the
spindle positioning carried out with Z pulse.
Step 5: Closed-loop vector pilot-run
Set P00.00=3, and carry out closed-loop vector control, adjust P00.10 and speed loop and current
loop PI parameter in P03 group to make it run stably in the whole range.
Step 6: Flux-weakening control
Set flux-weakening regulator gain P03.26=0
–8000, and observe the flux-weakening control effect.
P03.22
–P03.24 can be adjusted as needed.
2. Commissioning procedures for closed-loop vector control of synchronous motor
Step 1: Set P00.18=1, restore to default value
Step 2: Set P00.00=3 (VC) , set P00.03, P00.04, and motor nameplate parameters in P02 group.
Step 3: Set P20.00 and P20.01 encoder parameters
When the encoder is resolver-type encoder, set the encoder pulse count value to (resolver
pole pair number × 1024), for example, if pole pair number is 4, set P20.01 to 4096.
Step 4: Ensure the encoder is installed and set correctly
When motor stops, observe whether P18.21 (resolver angle) fluctuates, if it fluctuates sharply,
check the wiring and grounding. Rotates the motor slowly, observe whether P18.21 changes
accordingly. If yes, it indicates motor is connected correctly; if the value of P18.02 keeps
constant at a non-zero value after rotating for multiple circles, it indicates encoder Z signal is
correct.
Step 5: Autotuning of initial position of magnetic pole
Set P20.11=2 or 3 (3: rotary autotuning; 2: static autotuning), press RUN key to run the VFD.
