5.4 Details of Function Codes
5-178
Function Related Function Codes (Representative)
Dynamic torque vector control F42
Droop control H28
Torque detection E78 to E81
Vector control with/without speed sensor F42
Brake signal (Brake-off torque) J95
P05
Motor 1 (Auto-tuning)
When a long-time operation is executed by applying the dynamic torque vector control and slip
compensation control, the motor constant changes as the motor temperature increases.
When the motor constant changes, the motor speed correction amount changes. As a result, the motor
speed may deviate from the initial rotation number.
When the on-line tuning is validated, the motor constant that corresponds to the motor temperature change,
and minimize the motor speed change.
When this function is used, execute the set value "2" of the auto tuning (P04).
The on-line tuning operates only when F42 = 1 (dynamic torque vector control) or when F42 = 2
(V/f control: with slip compensation), and when F37 = 2.5 (auto torque boost)is active.
P06 to
P08
Motor 1 (No-Load Current, %R1, %X)
P06 to P08 set no-load current of the motor, %R1, and %X respectively. Obtain the appropriate values from
the test report of the motor or by contacting the manufacturer of the motor. Performing auto-tuning
automatically sets these parameters.
- No-load current: Enter the value obtained from the motor manufacturer.
- %R1: Enter the value calculated by the following expression.
(%)100×
I)×3/(V
R1 CableR1
%R1
+
=
R1: Primary resistance of the motor (Ω)
Cable R1: Resistance of the output cable (Ω)
V: Rated voltage of the motor (V)
I: Rated current of the motor (A)
- %X: Enter the value calculated by the following expression.
(%)100×
I)×3/(V
X Cable XM)XM/(X2×X2X1
%X
=
X1: Primary leakage reactance of the motor (Ω)
X2: Secondary leakage reactance of the motor (converted to primary) (Ω)
XM: Exciting reactance of the motor (Ω)
Cable X: Reactance of the output side cable (Ω)
V: Rated voltage of the motor (V)
I: Rated current of the motor (A)
For reactance, use the value at the base frequency (F04).
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