Delta CT2000 Series User Manual page 217

Chapter 12 Description of Parameter SettingsCT2000 Series
 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. Pr.01-00 setting is regarded as 100.0%.
 Output frequency upper limit = (Pr.01-00
 This setting 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
Motor rated voltage
(Vbase)
Mid-point voltage
(Vmid)
M in. output voltage
setting (Vmin)
 This setting 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 this parameter 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
frequency upper limit or max. operation frequency.
Voltage
01.02
01.04
01.06
01.05 01.03
Min. output
Mid-point
frequency
frequency
(Fmin)
(Fmid)

Pr.01-10) /100
01.01
Motor rated
frequency
(Fbase)
12.1-01-5
Frequency
01.00
Max. operation
frequency