Hitachi L100 Analog Input Settings

3–10

“A” Group: Standard Functions

Analog Input Settings

Configuring	Drive Parameters

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).

Frequency

A 12

A_15 = 00

A 11

A_15 = 01

A 13

A 14

10V

A 13

A 14

10V

4mA

20mA

4mA

20mA

% Input scale

“A” Function

Run

Defaults

Func.

Name /

Description

Mode

–FE

–FU

–FR

Units

Edit

Code

SRW Display

(CE)

(UL)

(Jpn)

A_11

O–L input active range

The output frequency corre-

✘

0.0

start frequency

sponding to the analog input

range starting point

IN EXS

000.0Hz

A_12

O–L input active range

The output frequency corre-

✘

0.0

end frequency

sponding to the analog input

range ending point

IN EXE

000.0Hz

A_13

O–L input active range

The starting point (offset) for

✘

start voltage

the active analog input range

IN EX%S

000%

A_14

O–L input active range

The ending point (offset) for

✘

100

end voltage

the active analog input range

IN EX%E

100%

A_15

O–L input start

Two options; select codes:

✘

—

frequency enable

00 ...Use offset (A_11 value)

01 ...Use 0 Hz

IN LEVEL

0Hz