Minimum Motor Speed Frequency And Hold Function At Motor Start Up - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters
5.8.5

Minimum motor speed frequency and hold function at motor start up

Set the frequency where the PM motor starts running.
Set the deadband in the low-speed range to eliminate noise and offset deviation when setting a fre-
quency with analog input.
Pr.
13
F102
571
F103
Starting frequency setting (Pr. 13)
● The frequency where the PM 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
frequency
(Hz)
NOTES 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 output does not start when the frequency-setting signal is less than Pr. 13. For exam-
ple, while Pr. 13 = "20 Hz", the inverter output starts when the frequency setting signal reaches
20 Hz.
FR-A800
(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
Name
Starting frequency
Holding time at a start
60
Set frequency
Output
frequency
Pr. 13
0
Output from 0.01 Hz
STF ON
Initial value Setting range
Minimum
frequency/
0 to 60 Hz
Minimum
rotations per
minute
0 to 10 s
9999
9999
Fig. 5-105:
Starting frequency parameter
Time
PM PM PM
Description
Set the frequency where the motor
starts running.
Set the time to hold 0.01 Hz.
The holding function at start is
disabled.
I002568E
5 - 261