Mitsubishi Electric FR-A800, Instruction Manual

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Parameters (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
FR-A800 5 - 253
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.
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.
Pr. Name Initial value Setting range Description
13
F102
Starting frequency
Minimum
frequency/
Minimum
rotations per
minute
0 to 60 Hz
Set the frequency where the motor
starts running.
571
F103
Holding time at a start 9999
0 to 10 s Set the time to hold 0.01 Hz.
9999
The holding function at start is
disabled.
Fig. 5-104:
Starting frequency parameter
I002568E
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.
PM PM PM
60
0
Output
frequency
(Hz)
Setting r
a
nge
Set frequency
Output
frequency
Time
Output from 0.01 Hz
STF ON
Pr. 13