Function Applications
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4.1.2.11 Frequency Reference Limits
Frequency upper limit: Defines the maximum running frequency of the motor.
Frequency lower limit: Defines the minimum running frequency of the motor.
Maximum frequency: Defines the maximum output frequency.
Source of frequency upper limit: Defines the source of the frequency upper limit reference.
Frequency upper limit offset: Defines the offset of the frequency upper limit. This parameter is valid
only when the frequency upper limit source is set to AI.
Para. No. Name
Default
Value Range
F0-10
Maximum frequency
50.00 Hz 50.00 Hz to 600.00 Hz
F0-11
Source of frequency upper
limit
0
0: Frequency upper limit
reference (F0-12)
1: AI1
2: AI2
3: AI3
5: Communication
6: Multi-speed reference
F0-12
Frequency upper limit
50.00 Hz
Frequency lower limit (F0-
14) to maximum frequency
(F0-10)
F0-13
Frequency upper limit
offset
0.00 Hz
0.00 Hz to maximum
frequency (F0-10)
F0-14
Frequency lower limit
0.00 Hz
0.00 Hz to frequency upper
limit (F0-12)
4.1.2.12 Action to Take When Frequency Is Below Lower Limit
The frequency lower limit defines the minimum running frequency for the motor.
If the frequency reference of the AC drive is lower than the frequency lower limit (F0-14), you need to
set F8-15 to further specify the corresponding action of the AC drive, including run at frequency lower
limit, stop, run at zero speed, and coast to stop.
● 0: Run at frequency lower limit
When the running frequency is lower than the frequency lower limit, the AC drive runs at the
frequency lower limit.
● 1: Stop
When the running frequency is lower than the frequency lower limit, the AC drive stops.
● 2: Run at zero speed
When the running frequency is lower than the frequency lower limit, the AC drive runs at zero
speed.