5.5 E: Motor Parameters
202 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Figure 5. 54
Figure 5.54 V/f Pattern for Motor 2
Note: 1. The following conditions must be true when setting up the V/f pattern: E3-09 ≤ E3-07 < E3-06 ≤ E3-11 ≤ E3-04
2. To make the V/f pattern a straight line at a frequency lower than E3-07, set E3-09 = E3-07. With this setting, E3-08 is disregarded.
3. Parameters E3-04 through E3-13 are reset to their default values when the drive is initialized.
4. E3-11, E3-12, and E3-13 rarely need to be changed, and should only be used to fine-tune the V/f pattern in the constant output range.
◆ E4: Motor 2 Parameters
E4 parameters contain the motor data for motor 2. These parameters are usually set automatically during the Auto-
Tuning process for vector control modes (Rotational Auto-Tuning, Stationary Auto-Tuning 1 and 2). They may need to
be set manually if there is a problem performing Auto-Tuning.
Note: As the function for switching between two motors cannot be used with a PM motor, the E5- parameters will be hidden when
a PM motor control mode is selected (A1-02 = 5, 6, or 7).
■ E4-01: Motor 2 Rated Current
Set E4-01 to the full load amps (FLA) stamped on the nameplate of motor 2. This value is used for motor protection and
to calculate torque limits. If Auto-Tuning completes successfully, the value entered to T1-04 will automatically be saved
to E4-01.
Note: 1. This value's number of decimal places depends on the drive model and the Heavy/Normal duty selection in parameter C6-01. The
value will have two decimal places (0.01 A) if the drive is set for a Maximum Applicable Motor Capacity up to 11 kW (refer to
Table A.2 and Table A.3) and one decimal place (0.1 A) if the set Maximum Applicable Motor Capacity is higher than 11 kW
2. If the motor rated current in E4-01 is set lower than the motor no-load current in E4-03, then a parameter setting error will occur
(oPE02). E4-03 must be set correctly to prevent this error.
■ E4-02: Motor 2 Rated Slip
This parameter sets the motor 2 rated slip frequency. Slip compensation is based on this value. The drive calculates this
value automatically during Auto-Tuning (Rotational Auto-Tuning and Stationary Auto-Tuning 1, 2).
For information on calculating the motor rated slip, refer to E2-02: Motor Rated Slip on page 198.
■
E4-03: Motor 2 Rated No-Load Current
Set the no-load current for motor 2 in amperes when operating at the rated frequency and the no-load voltage. The drive
sets E2-03 during the Auto-Tuning process (Rotational Auto-Tuning and Stationary Auto-Tuning 1, 2). 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: This value's number of decimal places depends on the drive model and the Heavy/Normal duty selection in parameter C6-01.
The value will have two decimal places (0.01 A) if the drive is set for a Maximum Applicable Motor Capacity up to 11 kW (refer
to Table A.2 and Table A.3) and one decimal place (0.1 A) if the set Maximum Applicable Motor Capacity is higher than 11 kW.
No. Parameter Name Setting Range Default
E4-01 Motor 2 Rated Current 10 to 200% of the drive rated current.
Determined by C6-01 and
o2-04
No. Parameter Name Setting Range Default
E4-02 Motor 2 Rated Slip 0.00 to 20.00 Hz
Determined by C6-01 and
o2-04
No. Parameter Name Setting Range Default
E4-03 Motor 2 Rated No-Load Current 0 to [E4-01]
Determined by C6-01 and
o2-04
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