Output Frequency Lower Limit - Delta C2000 series User Manual

Output Frequency Lower Limit


Settings
 The upper/lower output frequency setting is used to limit the actual output frequency. If the
frequency setting is higher than the upper limit, it will run with the upper limit frequency. If output
frequency lower than output frequency lower limit and frequency setting is higher than min.
frequency, it will run with lower limit frequency. The upper limit frequency should be set to be higher
than the lower limit frequency.
 Pr.01-10 setting must be ≥ Pr.01-11 setting.
 Upper output frequency will limit the max. Output frequency of drive. If frequency setting is higher
than Pr.01-10, the output frequency will be limited by Pr.01-10 setting.
 When the drive starts the function of slip compensation (Pr.07-27) or PID feedback control, drive
output frequency may exceed frequency command but still be limited by this setting.
 Related parameters: Pr.01-00 Max. Operation Frequency and Pr.01-11 Output Frequency Lower
Limit
M otor rated voltage
(Vbase)
Mid-point voltage
(Vmid)
M in. output voltage
setting (Vmin)
 Lower output frequency will limit the min. output frequency of drive. When drive frequency command
or feedback control frequency is lower than this setting, drive output frequency will limit by the lower
limit of frequency.
 When the drive starts, it will operate from min. output frequency (Pr.01-05) and accelerate to the
setting frequency. It won't limit by lower output frequency.setting.
 The setting of output frequency upper/lower limit is used to prevent personal misoperation, overheat
due to too low operation frequency or damage due to too high speed.
 If the output frequency upper limit setting is 50Hz and frequency setting is 60Hz, max. output
frequency will be 50Hz.
 If the output frequency lower limit setting is 10Hz and min. operation frequency setting (Pr.01-05) is
1.5Hz, it will operate by 10Hz when the frequency command is greater than Pr.01-05 and less than
10Hz. If the frequency command is less than Pr.01-05, the drive will be in ready status and no
output.
 If the frequency output upper limit is 60Hz and frequency setting is also 60Hz, it won't exceed 60Hz
even after slip compensation. If the output frequency needs to exceed 60Hz, it can increase output
0.0~600.00Hz
Voltage
01.02
01.04
01.06
01.05 01.03
Min. output
Mid-point
frequency
frequency
(Fmin)
(Fm id)
Chapter 12 Description of Parameter SettingsC2000 Series
01.01
Motor rated
frequency
(Fbase)
12-26
Factory Setting: 0.00
Frequency
01.00
Max. operation
frequency