Fuji Electric FRENIC MEGA G2 Series - Page 285

5.3 Description of Function Codes 5.3.1 F codes (Fundamental functions)
5-101
FUNCTION CODES
Chap 5
FUNCTION
CODES
F Codes
E Codes
C Codes
P Codes
H Codes
A Codes
b Codes
r Codes
J Codes
d Codes
U Codes
y Codes
K Codes
F15, F16
Frequency limiter (Upper limit), Frequency limiter (Lower limit)
Related function code: H63 Lower limit limiter (Mode selection)
 Frequency limiter (Upper limit) (Lower limit) (F15, F16)
F15 and F16 specify the upper and lower limits of the output frequency or reference frequency, respectively.
Frequency limiter
Object to which the limit is applied
Frequency limiter (upper limit)
F15
Output frequency
Frequency limiter (lower limit)
F16
Frequency specified by frequency command
When the limit is applied to the reference frequency or reference speed, delayed responses of
control may cause an overshoot or undershoot, and the frequency may temporarily go beyond the
limit level.
• Data setting range: 0.0 to 599.0 (Hz)
 Low Limiter (Mode selection) (H63)
H63 specifies the operation to be carried out when the reference frequency drops below the low level specified by
F16, as follows:
H63 data
Enable
0
The output frequency will be held at the low level specified by F16.
1
Decelerate to stop
Refer to the figure below.
(For H63 = 0)
(For H63 = 1)
◼ Upper/lower limit limiter with analog input (E61 to E63, E66)
By setting analog input terminal [12], [C1] (C1 function) (V3 function), or [V2] to “13: Frequency limiter (upper limit)”
or “14: Frequency limiter (lower limit)”, the frequency obtained by multiplying the applicable analog input (0 to 100%)
by the maximum frequency in real time is used as the frequency limiter. The data range is limited to plus polarity,
and the minus side is recognized as 0. The same operation is performed for both the F15 and F16 settings.
• When changing the frequency limiter (Upper) (F15) in order to raise the operation frequency, be sure
to change the maximum frequency (F03) accordingly.
• Set each function code related to operation frequency so that the relationship among data becomes
the following magnitude relationship.
- F15>F16, F15>F23, F15>F25
- F03>F16
However, F23 is the starting frequency, and F25 is stop frequency
If any wrong data is specified for these function codes, the inverter may not run the motor at the desired
speed, or cannot start it normally.
Operation
frequency
Maximum frequency
Frequency
limiter (high)
Frequency limiter (low)
Frequency
setting
Operation
frequency
Maximum frequency
Frequency limiter (high)
Frequency limiter (low)
Frequency
setting