Minimum Motor Speed Frequency - Mitsubishi Electric 800 Series Instruction Manual

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
5.8.5

Minimum motor speed frequency

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 frequency with analog input.
Pr.
13
Starting frequency
F102
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)
60
Set frequency
Pr.13
0
Output from 0.01Hz
STF ON
NOTE
• 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 example, while Pr.13 = "20 Hz",
the inverter output starts when the frequency setting signal reaches 20 Hz.
CAUTION
 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 will run the motor at the frequency set in Pr.2 even if the command frequency is not input.
Parameters referred to ???????
Pr.2 Minimum frequency page 329
Pr.7 Acceleration time page 269
284
PARAMETERS
Name Initial value
Minimum frequency/
Minimum rotations
per minute
Output
frequency
Time
PM PM PM
Setting range
Set the frequency where the motor starts
0 to 60 Hz
running.
Description