Setting of acceleration/deceleration time
and acceleration/deceleration pattern
Starting frequency and start-time hold function (Pr. 13, Pr. 571)
You can set the starting frequency and hold the set starting frequency for a certain period of time.
Set these functions when you need the starting torque or want to smooth motor drive at a start.
Holding time at a start
The inverter will not start if the frequency setting signal is less than the value set in Pr. 13.
For example, when 5Hz is set in Pr. 13, the motor will not start running until the frequency setting signal reaches 5Hz.
Pr.571 setting time
⋅ When the start signal was turned off during start-time hold, deceleration is started at that point.
⋅ At switching between forward rotation and reverse rotation, the starting frequency is valid but the start-time hold function is
Note that when Pr. 13 is set to any value lower than Pr. 2 Minimum frequency, simply turning on the start signal will
run the motor at the preset frequency even if the command frequency is not input.
♦ Parameters referred to ♦
Pr. 2 Minimum frequency
(1) Starting frequency setting (Pr. 13)
⋅ Frequency at start can be set in the range 0 to 60Hz.
⋅ You can set the starting frequency at which the start signal is
(2) Start-time hold function (Pr. 571)
⋅ This function holds the time set in Pr. 571 and the output
⋅ This function performs initial excitation to smooth the motor drive
Refer to page 79
0 to 60Hz
0.0 to 10.0s
frequency set in Pr. 13 Starting frequency.
at a start.
When Pr. 13 = "0Hz", the starting frequency is held at 0.01Hz.
Frequency at start can be set in the
range 0 to 60Hz.
You can set the starting frequency at
which the start signal is turned on.
Set the holding time of Pr. 13 Starting
Holding function at a start is invalid