GE Fuji Electric MICRO-SAVER AF-300 Скачать руководство пользователя

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5-12

5-13

However to synchronize output frequency and motor
speed, the momentary overcurrent limiter (H12 = 1)
should be enabled.
This setting is optimal

for cases in which due to the

heavy moment of inertia of its load the motor would take
a long time to coast to a stop because of power failure.

– Restart at the starting frequency (F14 = 5)
If an instantaneous power failure occurs when the drive
is in Run mode so that the drive detects undervoltage of
the intermediate dc circuit, then the drive immediately
shuts down its outputs. After power is recovered,
entry of any run command will restart the drive at the
frequency specified by function code F23. Refer to the
figure (F14 = 5) on the following page for details.
This setting is optimal for cases where due to a high
load with a very low moment of inertia the motor quickly
comes to a stop when de-energized

WARNING

If you select the auto restart function “active” in the
restart mode after instantaneous power failure (function
code F14), the drive automatically restarts running the
motor when the power is recovered.
Design the machine so that human safety is ensured
after restarting.

Otherwise an accident could occur.

F15,

F16

Frequency Limiter (Peak and Minimum)

Frequency limiter F15 limits the peak or maximum
output frequency. Frequency limiter F16 maintains the
output frequency at a minimum level even if the set
frequency is lower than that. Refer to the figure below.

NOTE: Set the peak and minimum frequencies correctly;
otherwise, the drive may not operate. Maintain the
following relationship between the limiters:
- (Peak frequency) > (Minimum frequency), (Starting

frequency), (Stop frequency)

- (Minimum frequency) < (Maximum frequency)

F18

C50

C32,

C34

C37,

C39

Bias (for Frequency Command 1)

Bias (Bias reference point for frequency

command 1)

Analog Input Adjustment (Gain and gain

reference point for terminal input [12])

Analog Input Adjustment (Gain and gain

reference point for terminal input [C1])

If you select any analog input for frequency command 1,
it is possible to define the relationship between the
analog input and the set frequency arbitrarily by combin-
ing the settings for bias (F18), bias reference point (C50),
gains (C32 and C37), and gain reference points (C34 and
C39).
As illustrated in the graph on the next page, the rela-
tionship between the set frequency and analog input
for frequency command 1 is shown by a straight line
passing through points “A” and “B.” “A” is determined
by the bias (F18) and its reference point (C50). “B” is
determined by the gain (C32 or C37) and its reference
point (C34 or C39). The combination of C32 and C34
will apply for terminal [12] and that of C37 and C39 for
terminal [C1].
The bias (F18) and gain (C32 or C37) should be set,
supposing the maximum frequency as 100%. The bias
reference point (C50) and gain frequency point (C34 or
C39) should be set, supposing the full scale (10 Vdc or
20 mAdc) as 100%.