Hitachi L100 Series, Инструкция по эксплуатации

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“A” Group: Standard Functions
Configur
ing
Dr
iv
e P
a
ra
m
e
ters
3–10
Analog Input Settings
The inverter has the capability to accept an external analog input that can command the
output frequency to the motor. Voltage input (0 –10V) and current input (4–20mA) are
available on separate terminals ([O] and [OI], respectively). Terminal [L] serves as
signal ground for the two analog inputs. The analog input settings adjust the curve
characteristics between the analog input and the frequency output.
In the graph below (left), A_13 and A_14 select the active portion of the input voltage or
current range. The parameters A_11 and A_12 select the start and end frequency of the
converted output frequency range, respectively. Together, these four parameters define a
line segment as shown (below, right). When the line does not begin at the origin, A_15
defines whether the inverter outputs 0Hz or the A_11 frequency when the analog input
value is less than the A_13 setting (determines the non-linear part of the translation).
A 12
A 11
A 13 A 14
A 12
A 11
A_15 = 00
A_15 = 01
A 13 A 14
Frequency Frequency
0V
4mA
10V
20mA
% Input scale % Input scale
0V
4mA
10V
20mA
0 0
% %
“A” Function
Run
Mode
Edit
Defaults
Func.
Code
Name /
SRW Display
Description
–FE
(CE)
–FU
(UL)
–FR
(Jpn)
Units
A_11 O/OI–L input active
range start frequency
The output frequency corre-
sponding to the analog input
range starting point
✘
0.0 0.0 0.0 Hz
IN EXS 000.0Hz
A_12 O/OI–L input active
range end frequency
The output frequency corre-
sponding to the analog input
range ending point
✘
0.0 0.0 0.0 Hz
IN EXE 000.0Hz
A_13 O/OI–L input active
range start voltage
The starting point (offset) for
the active analog input range
✘
0 0 0 %
IN EX%S 000%
A_14 O/OI–L input active
range end voltage
The ending point (offset) for
the active analog input range
✘
100 100 100 %
IN EX%E 100%
A_15 O/OI–L input start
frequency enable
Two options; select codes:
00 ...Use offset (A_11 value)
01 ...Use 0 Hz
✘
01 01 01 —
IN LEVEL 0Hz