Starting Frequency And Start-Time Hold Function (Pr.13, Pr.571) - Mitsubishi Electric FR-F720-0.75K to 110K Instruction Manual

Setting of acceleration/deceleration time
and acceleration/deceleration pattern
4.7.2

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.
Parameter
Number
13 Starting frequency
571 Holding time at a start
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 175)
Output
frequency
(Hz)
60
Pr.13
0
ON
STF
CAUTION
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.
Output
frequency
(Hz)
60
Pr. 13
0
Pr. 571 setting time
ON
STF
CAUTION
⋅ 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
invalid.
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
98
Name Initial Value
(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
Time
(2) Start-time hold function (Pr.571)
⋅ This function holds the output frequency set in Pr. 13 Starting
⋅ This function performs initial excitation to smooth the motor
Time
CAUTION
Refer to page 82
Setting Range
0.5Hz 0 to 60Hz
0.0 to 10.0s
9999
9999
turned on.
frequency during the period set in Pr. 571.
drive at a start.
REMARKS
When Pr. 13 = "0Hz", the starting frequency is held at 0.01Hz.
Description
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 frequency.
Holding function at a start is invalid