Minimum motor speed frequency and hold
function at the motor start up
Set the frequency where the IPM motor starts running.
Set the deadband in the low-speed range to eliminate noise and offset deviation when setting a frequency with analog input.
Holding time at a start
Starting frequency setting (Pr.13)
• The frequency where the IPM motor starts running can be set in the range of 0 to 60 Hz.
• While the frequency command is less than the Pr.13 Starting frequency setting, the PM motor is stopped.
When the frequency command reaches the set frequency or higher, the PM motor accelerates according to the Pr.7
Acceleration time setting.
Output from 0.01Hz
• Under induction motor control (under V/F control, Advanced magnetic flux vector control, Real sensorless vector control, and
Vector control), the output starts at the frequency set in Pr.13. Under PM sensorless vector control, the output always starts
at 0.01 Hz.
• The inverter does not start if the frequency setting signal has a value lower than that of Pr.13. For example, while Pr.13 = "20
Hz", the inverter output starts when the frequency setting signal reaches 20 Hz.
Start-time hold function (Pr.571)
• This function holds 0.01 Hz during the period set in Pr.571.
• Pr.571 is active when the low-speed range high-torque characteristic is enabled (Pr.788 = "9999").
Pr.571 setting time
• Note that when Pr.13 is set to any value equal to or lower than Pr.2 Minimum frequency, simply turning ON the start
signal runs the motor at the frequency set in Pr.2 even if the command frequency is not given.
Parameters referred to
5.8 (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
minimum rotations per minute
Holds 0.01 Hz
Set the frequency where the motor starts
0 to 60 Hz
0 to 10 s
Set the time to hold 0.01 Hz.
The holding function at start is disabled.