Function Application
‑588‑
Table 3–27 Brief procedure of setting the torque control mode in FVC mode
Procedure
Para.
Description
Check the AC drive wiring.
‑
If the AC drive reports E19.00 during
motor auto‑tuning, check whether the
AC drive wiring and motor parameter
settings are correct.
Set motor parameters. F1‑01, F1‑02, F1‑03,
F1‑04, F1‑05
Set the encoder type and
pulses per revolution.
F1‑27, F1‑28
If the AC drive reports E20.00, check
whether the encoder and PG card are
working properly.
Select a control mode.
F0‑01
‑
Perform the motor auto‑
tuning.
F1‑37
Dynamic auto‑tuning on all
parameters of the asynchronous
motor takes some time. Wait until this
process is completed before
proceeding to the next step. Dynamic
auto‑tuning on all parameters of the
asynchronous motor is recommended
(set F1‑37 to 2). Before performing
auto‑tuning, remove the load from
the motor so that the motor can reach
a high speed. If the load cannot be
removed from the motor (for
example, motor of a crane), use static
auto‑tuning on all motor parameters
(set F1‑37 to 3).
Set the command source.
F0‑02
‑
Set the torque control
parameters.
A0‑00, A0‑01, A0‑
03, A0‑05
‑
Perform a trial run.
‑ ‑
Speed loop settings
If the motor oscillates or generates abnormal noise when running below the rated
frequency, the speed loop gains are set too high. In this case, reduce the speed loop
gains by reducing the values of F2‑00 and F2‑03 and increasing the values of F2‑01
and F2‑04.
If the system speed overshoot is high during rapid acceleration, increase the speed
loop proportional gain Kp by increasing the values of F2‑00 and F2‑03 and reduce the
speed loop integral gain Ki by increasing the values of F2‑01 and F2‑04.
In a winding/unwinding scenario, the roll diameter changes in inverse proportion to
the motor speed. Therefore, when the roll diameter is large, increase the speed loop
gain (by increasing the value of F2‑00 and reducing the value of F2‑01) at low speed to
ensure dynamic response of the system.
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