5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
Motor 1 (Synchronous motor magnetic pole position draw-in frequency)
Related function code: P30 Motor 1 (Synchronous motors, Magnetic pole position
detection mode)
Under vector control with PM sensor, if using an encoder with A/B-phase and Z-phase output, the magnetic pole
position will be unknown immediately after turning ON the power, and therefore magnetic pole position draw-in
operation is performed at the frequency set at d80 until the Z-phase is detected. After the Z-phase is detected, the
magnetic pole position based on the magnetic pole position sensor offset set in P95 is established, and operation
switches to normal operation.
Basically, there is no need to modify the setting.
Data setting range:0.1 to 10.0 Hz (Factory default: 1.0 Hz)
Magnetic flux weakening control (Speed sensorless vector control)
Magnetic flux weakening lower limit (Speed sensorless vector control)
By setting d82 to “1” (enable), the motor magnetic flux is controlled based on the command torque. If the command
torque is low, the motor magnetic flux is weakened with d83 as the lower limit, and control stability is improved.
Set the magnetic flux weakening lower limit in % units at d83. If the value is too small, problems such as hunting or
speed stagnation may occur. As long as there are no problems, use with the factory default of “40%”.
Acceleration/deceleration output filter
This code is described in detail at the F07 item.
Motor 1 (Synchronous motor high-efficiency control)
High-efficiency synchronous motor control is performed with motor constants. If wishing to run a synchronous motor
without knowing the motor constants, or when unable to perform rotation tuning, operation may be possible by
disabling high-efficiency control.
Synchronous motor high-efficiency control
Magnetic flux level during deceleration
This code is described in detail at the H71 item.
d79, d81
d84, d85
d88
d91 to d97
These function codes are displayed, but are for use by the manufacturer. Unless otherwise specified, do not access
these function codes.
These function codes are reserved for special adjustment. There is normally no need to change these codes.
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