Hitachi L2002 Instruction Manual page 95

"A" Function
Func. Name /
Code SRW Display
A005 [AT] selection
AT-Slct O/OI
A011 O–L input active range
start frequency
O-EXS 0000.0Hz
A012 O–L input active range
end frequency
O-EXE 0000.0Hz
A013 O–L input active range
start voltage
O-EX%S 00000%
A014 O–L input active range
end voltage
O-EX%E 00100%
A015 O–L input start
frequency enable
O-LVL 0Hz
A016 External frequency
filter time constant
F-SAMP 00008
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.
Description
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
The output frequency corre-
sponding to the analog input
range starting point,
range is 0.0 to 400.0
The output frequency corre-
sponding to the analog input
range ending point,
range is 0.0 to 400.0
The starting point (offset) for
the active analog input range,
range is 0. to 100.
The ending point (offset) for
the active analog input range,
range is 0. to 100.
Two options; select codes:
00 .. Use offset (A011 value)
01 .. Use 0 Hz
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.
L200 Inverter
2
Run Defaults
Mode
–FE(F) –FU
Edit
(EU) (USA)
Lo Hi
✘ ✔
00 00
✘ ✔
0.0 0.0
✘ ✔
0.0 0.0
✘ ✔
0. 0.
✘ ✔
100. 100.
✘ ✔
01 01
✘ ✔
2. 8.
3–15
Units
Hz
Hz
Hz
%
%
—
Sam-
ples