Delta VFD300C43S-HS User Manual page 485

8. Execute inertia estimation for PM
(1) Set Pr.00-11 = 4 FOCPG control.
(2) Set the operation frequency command to 2/3 of the motor's rated frequency.
(3) Set the acceleration / deceleration time (Pr.01-12, Pr.01-13) to 1/10 of the default time.
(Adjust the acceleration / deceleration time according to the load inertia. The smaller the
load inertia, the shorter the acceleration / deceleration time is set).
(4) Check if the load and the motor is connected.
(5) Set Pr.11-00 bit1 = 1 inertia estimate (only in FOCPG mode).
 Press "RUN" key to proceed the inertia
Quickly run the motor in forward and reverse direction repeatedly, and observe the
inertia estimated value of Pr.11-01 for the keypad.
a. If the system inertial estimated value of Pr.11-01 does not change (= default 256), it
means the inertia estimation is wrong. Reduce the frequency command and estimate
the inertia again.
b. If the system inertia estimated value of Pr.11-01 is still a lot different from the
estimated value of FWD/REV operation, continue the estimation in forward / reverse
operating direction to restraint the estimated inertia to small difference.
 Press "STOP" key to obtain the estimated inertia value:
a. Press "ENTER" to confirm the input value at the displayed page of the last estimated
inertia value of Pr.11-01.
b. Set Pr.11-01 bit1 = 0, return the control mode to speed mode.
c. Set the acceleration / deceleration time (Pr.01-12, Pr.01-13) back to the default value.
Chapter 12 Description of Parameter SettingsC2000-HS
12.2-00-15