YASKAWA F7 Programming Manual page 69

The Motor Rated Current parameter (E2-01) is used by the Drive to protect the motor and for proper Vector control when
using Open Loop Vector or Flux Vector control methods (E3-01 = 2 or 3). The motor protection parameter L1-01 is enabled by
default. Set E2-01 to the full load amps (FLA) stamped on the motor's nameplate.
During Auto-tuning, it is required for the operator to enter the motor's rated current (T1-04) in the Auto-Tuning menu. If the
Auto-tuning operation completes successfully (T1-02 = 0), the value entered into T1-04 will automatically be written into E4-
01.
E4-02 Motor 2 Rated Slip
Setting Range: Model Dependent
Factory Default: Model Dependent
This parameter sets the motor rated slip frequency in units of 0.01Hz. If the rotational Auto-tuning operation completes
successfully, this value is automatically calculated. The default setting varies depending on the drive model number (o2-04).
The following equation to calculate the motor rated slip frequency based on motor nameplate data:
where:
E4-03 Motor 2 No Load Current
Setting Range: Model Dependent
Factory Default: Model Dependent
Set E4-03 to the motor no-load current at rated voltage and rated frequency. If the rotational Auto-tuning operation completes
successfully (T1-02 = 0), this value is automatically calculated. Consult the motor manufacturer for the proper value if the no
load current is not stated on the motor nameplate.
E4-04 Motor 2 Number of Poles
Setting Range: 2 to 48
Factory Default: 4
This parameter sets the number of motor poles. During auto-tuning, it is required for the operator to enter the number of motor
poles (T1-06) in the Auto-Tuning menu. If the Auto-tuning operation completes successfully (T1-02 = 0, 1, or 2), the value
entered into T1-06 will automatically be written into E4-04.
E4-05 Motor 2 Line-to-Line Resistance
0.0000to 65.000 Ω
Setting Range:
Factory Default: 9.842 Ω
Sets the line-to-line resistance of the motor's stator winding. If the Auto-tuning operation completes successfully (T1-02 = 0,
1, or 2), this value is automatically calculated. Remember this value must be entered as line-line and not line neutral.
(
Phase-to-phase Resistance at
E2-05=
Insulation Class Temperature
f : slip frequency (Hz)
s
f : rated frequency (Hz)
N : rated motor speed (rpm)
P : number of motor poles
( ⋅ )
N P
f s f ---------------- -
=
–
120
)
273 + (25 + insulation class temperature) /2
X
273 + insulation class temperature
Where: Insulation class temperature is in °C
Programming 61