Mitsubishi Electric 800 Series Instruction Manual page 203

5.5.5 Minimum motor speed frequency
PM PM PM
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 0.01 Hz
STF ON
NOTE
• Under induction motor control (under V/F control and Advanced magnetic flux vector control), the output starts at the
frequency set in Pr.13. Under PM motor 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 the setting of 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
Pr.7 Acceleration time
202
5. PARAMETERS
5.5 (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
Name
Minimum frequency/
Minimum rotations
per minute
Output
frequency
Time
page 253
page 190
Initial value Setting range
0 to 60 Hz
Description
Set the frequency where the motor starts
running.