Hitachi L2002 User Manual
Page 95
L200
2
Inverter
Conf
igur
ing
Dr
iv
e P
a
ra
m
e
ters
3–15
A016:
External Frequency Filter Time Constant – This filter smooths the analog input signal
for the inverter’s output frequency reference.
• A016 sets the filter range n=1 to 16. This is a simple moving average calculation,
where n (number of samples) is variable.
• A016 = 17 is a special value. It configures the inverter to use a moveable deadband
feature. Initially the inverter uses the average of the previous 16 samples. Then, the
deadband is employed for each subsequent average of 16 samples. The deadband
works by ignoring small fluctuations in each new average: less than +0.1Hz or –0.2Hz
change. When a 16-sample average exceeds this deadband, then the inverter applies
that average to the output frequency reference, and it also becomes the new deadband
comparison point for subsequent sample averages.
“A” Function
Run
Mode
Edit
Lo Hi
Defaults
Func.
Code
Name /
SRW Display
Description
–FE(F)
(EU)
–FU
(USA)
Units
A005 [AT] selection
Four options, select codes:
00 .. Select between [O] and
[OI] at [AT]
01 .. [O] + [OI] ([AT] input is
ignored)
02 .. Select between [O] and
keypad potentiometer
03 .. Select between [OI] and
keypad potentiometer
✘ ✔
00
00
Hz
AT-Slct O/OI
A011 O–L input active range
start frequency
The output frequency corre-
sponding to the analog input
range starting point,
range is 0.0 to 400.0
✘ ✔
0.0
0.0
Hz
O-EXS 0000.0Hz
A012 O–L input active range
end frequency
The output frequency corre-
sponding to the analog input
range ending point,
range is 0.0 to 400.0
✘ ✔
0.0
0.0
Hz
O-EXE 0000.0Hz
A013 O–L input active range
start voltage
The starting point (offset) for
the active analog input range,
range is 0. to 100.
✘ ✔
0.
0.
%
O-EX%S 00000%
A014 O–L input active range
end voltage
The ending point (offset) for
the active analog input range,
range is 0. to 100.
✘ ✔
100.
100.
%
O-EX%E 00100%
A015 O–L input start
frequency enable
Two options; select codes:
00 .. Use offset (A011 value)
01 .. Use 0 Hz
✘ ✔
01
01
—
O-LVL 0Hz
A016 External frequency
filter time constant
One range plus one setting:
01 to 16... Moving average,
where n=1 to 16 (number of
samples for average)
17 .. Use 16-sample average,
plus deadband +0.1/–0.2Hz.
✘ ✔
2.
8.
Sam-
ples
F-SAMP 00008