Delta ME300 Series - Page 220

Chapter 12 Description of Parameter Settings
ME300
12.1-01-5

01-10
Output Frequency Upper Limit
Default: 599.00
Settings
0.00–599.00 Hz

01-11
Output Frequency Lower Limit
Default: 0.00
Settings
0.00–599.00 Hz
 If the frequency setting is higher than the upper limit (Pr.01-10), the drive uses the upper limit
frequency. If the output frequency is lower than lower limit (Pr.01-11) and frequency setting is
higher than minimum frequency (Pr.01-07), the drive uses the lower limit frequency. Set the upper
limit frequency > lower limit frequency (Pr.01-10 setting value must be > Pr.01-11 setting value).
 If the PID control is enabled for the drive, the drive’s output frequency may exceed frequency
command but is still limited by this setting.
 Related parameters: Pr.01-00 Maximum Operation Frequency.
 When the drive starts, it operates from the minimum output frequency (Pr.01-07) and accelerates
to the setting frequency. It is not limited by the lower output frequency settings.
 Use the frequency upper and lower limit settings to prevent operator misuse, overheating caused
by operating at a too low frequency, or damage caused by excessive speed.
 If the frequency upper limit setting is 50 Hz and the frequency setting is 60 Hz, the operating
frequency is 50 Hz.
 If the frequency lower limit setting is 10 Hz and the minimum operation frequency setting (Pr.01-
07) is 1.5 Hz, the drive operates at 10 Hz when the frequency command is greater than Pr.01-07
and less than 10 Hz. If the frequency command is less than Pr.01-07, the drive stays in ready
status with no output.