Hitachi X200-002SFE/NFU Instruction Manuals page 178

Frequency arrival output [FA1] uses the
standard output frequency (parameter
F001) as the threshold for switching. In
the figure to the right, Frequency
Arrival [FA1] turns ON when the
output frequency gets within 0.5 Hz
below or 1.5 Hz above the target
constant
hysteresis that prevents output chatter
near the threshold value. The hysteresis
effect causes the output to turn ON
slightly
the threshold. Then the turn-OFF point
is slightly
modified by a small 60 ms delay. Note
the active low nature of the signal, due
to the open collector output.
Frequency arrival output [FA2] works
the same way; it just uses two separate
thresholds as shown in the figure to the
right.
acceleration and deceleration thresholds
to provide more flexibility than for
[FA1].
acceleration for the ON threshold, and
C0043 during deceleration for the OFF
threshold. This signal also is active low
and has a 60 ms delay after the
frequency
Having
thresholds provides an asymmetrical
output function. However, you can use
equal ON and OFF thresholds, if
desired.
More user manuals on
frequency. This
early
as the speed approaches
delayed
. The timing is further
These provide for
[FA2] uses C042
thresholds are
different accel
ManualsBase.com
Output
freq.
provides 0
FA1
signal
Output
freq.
thresholds
C042 accel.
separate
C043 decel.
during
0
FA2
signal
crossed.
and decel
1.5 Hz
F001
0.5 Hz
F001
1.5 Hz
0.5 Hz
ON ON
60ms 60ms
0.5 Hz
1.5 Hz
ON
60ms 60ms
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