11.6 E: Motor Parameters
642 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
■ E2-02: Motor Rated Slip
No.
(Hex.)
Name Description
Default
(Range)
E2-02
(030F)
Motor Rated Slip
Sets motor rated slip.
Determined by o2-04
(0.000 - 20.000 Hz)
The setting value of E2-02 is the slip compensation reference value. The drive sets this parameter during the
Auto-Tuning process (Rotational Auto-Tuning and Stationary Auto-Tuning). If Auto-Tuning cannot be performed,
calculate the motor rated slip using the information written on the motor nameplate and the formula below:
E2-02 = f - (n × p) / 120
• f: Motor rated frequency (Hz)
• n: Rated motor speed (min
-1
(r/min))
• p: Number of motor poles
■ E2-03: Motor No-Load Current
No.
(Hex.)
Name Description
Default
(Range)
E2-03
(0310)
Motor No-Load Current
Sets the no-load current for the motor in amps when operating at the rated frequency and the no-
load voltage.
Determined by o2-04
(0 - E2-01)
Note:
The units for the default setting and setting range vary depending on the model of the drive.
• 2003 to 2033, 4002 to 4018: 0.01 A units
• 2047 to 2415, 4024 to 4605: 0.1 A units
The drive sets this parameter during the Auto-Tuning process (Rotational Auto-Tuning and Stationary Auto-
Tuning). The motor no-load current listed in the motor test report can also be entered to E2-03 manually. Contact
the motor manufacturer to receive a copy of the motor test report.
Note:
The default setting of the no-load current is for performance with a 4-pole motor recommended by Yaskawa.
■ E2-04: Motor Pole Count
No.
(Hex.)
Name Description
Default
(Range)
E2-04
(0311)
Motor Pole Count
Sets the number of motor poles.
4
(2 - 120)
Note:
• When A1-02 = 0, 1, 3 [Control Method Selection = V/f, CL-V/f, CLV], the maximum value is 120.
• When A1-02 = 2, 4 [OLV, AOLV], the maximum value is 48.
Auto-Tuning automatically sets this parameter to the value of [Number of Motor Poles].
■ E2-05: Motor Line-to-Line Resistance
No.
(Hex.)
Name Description
Default
(Range)
E2-05
(0312)
Motor Line-to-Line
Resistance
Sets the line-to-line resistance for the motor stator windings.
Determined by o2-04
(0.000 - 65.000 Ω)
Note:
This value is the motor line-to-line resistance. Be careful not to set this parameter with the single phase resistance.
If Auto-Tuning completes successfully, this value is automatically calculated. If Auto-Tuning cannot be executed,
obtain a test report from the motor manufacturer. Use the information found on the motor nameplate with any of
the following formulas to calculate the motor line-to-line resistance.
• E-type insulation: Multiply 0.92 times the resistance value (Ω) listed on the test report at 75 °C.
• B-type insulation: Multiply 0.92 times the resistance value (Ω) listed on the test report at 75 °C.
• F-type insulation: Multiply 0.87 times the resistance value (Ω) listed on the test report at 115 °C.
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