YASKAWA A1000 Technical Manual page 143

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A1-02: Control Method Selection
Selects the Control Method (also referred to as the "control mode") the drive uses to operate the motor. If the drive is set
up to run two motors, then A1-02 determines the control mode for motor 1.
Note: When changing control modes, all parameter settings depending upon the setting of A1-02 will be reset to the default.
No.
A1-02
Control Modes for Induction Motors (IM)
Setting 0: V/f Control for Induction Motors
V/f Control is for simple speed control and multiple motor applications with low demands to dynamic response or speed
accuracy. This control mode should be used when the motor parameters are unknown and Auto-Tuning cannot be
performed. The speed control range is 1:40.
Setting 1:V/f Control with PG Speed Feedback
For general-purpose applications that do not require high dynamic response but high speed accuracy. This mode should
be used if the motor parameters are unknown and Auto-Tuning cannot be performed. The speed control range is 1:40.
Setting 2: Open Loop Vector Control
For general, variable-speed applications with a speed control range of 1:200 that require precise speed control, quick
torque response, and high torque at low speed without using a speed feedback signal from the motor.
Setting 3: Closed Loop Vector Control
For general, variable-speed applications that requiring precise speed control down to zero speed, fast torque response, or
precise torque control. A speed feedback signal from the motor is required. The speed control range is up to 1:1500.
Control Modes for Permanent Magnet Motors (SPM or IPM)
Setting 5: Open Loop Vector Control for PM
For general, variable-speed applications with low demands to dynamic response or speed accuracy. The drive can control
an SPM or IPM motor with a speed range of 1:20.
Setting 6: Advanced Open Loop Vector Control for PM
For general, variable-speed applications that require precise speed control and torque limit. The drive can control an IPM
motor with a speed range of 1:20. Set High Frequency Injection parameter n8-57 to 1 to achieve a speed control range as
high as 1:100. Refer to n8-57: High Frequency Injection on page 312
Setting 7: Closed Loop Vector Control for PM
This mode can be used for high precision control of a PM motor in constant torque or variable torque applications. The
speed control range reaches 1:1500. A speed feedback signal is required.

A1-03: Initialize Parameters
Resets parameters back to the original default values. After initialization, the setting for A1-03 automatically returns to 0.
No.
A1-03
Setting 1110: User Initialize
Drive parameters are reset to values selected by the user as User Settings. User Settings are stored when parameter o2-03
is set to "1: Set defaults".
Note: A "user-initialization" resets all parameters to a user-defined set of default values that were previously saved to the drive. To
clear the user-defined default values, set parameter o2-03 to 2.
Setting 2220: 2-Wire Initialization
Resets parameters except parameters listed in
Forward run and Reverse run, respectively. For more on digital input functions, refer to
Reverse run command for 2-wire sequence on page
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Parameter Name
Control Method Selection
Parameter Name
Initialize Parameters
Table 5.1 to default settings with digital inputs S1 and S2 configured as
242.
Setting Range
0, 1, 2, 3, 5, 6, 7
for details.
Setting Range
0, 1110, 2220, 3330, 5550
Setting 40, 41: Forward run,
5.1 A: Initialization
Default
0
5
Default
0
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