Hitachi WJ200-001S Instruction Manual page 235

428
Analog Input Current/Voltage Select
The [AT] terminal selects whether the inverter uses the voltage [O] or current [OI]
input terminals for external frequency control. When intelligent input [AT] is ON, you
can set the output frequency by applying a current input signal at [OI]-[L]. When the
[AT] input is OFF, you can apply a voltage input signal at [O]-[L] to set the output
frequency. Note that you must also set parameter
terminal set for controlling the inverter frequency.
Option Terminal
Code Symbol

AT
Valid for inputs:
Required settings
Notes:
 If the [AT] option is not assigned to any intelligent
input terminal, then inverter recognizes [AT] =
OFF in following table.

Combination of
analog input activation.

[AT] Input
ON

OFF
ON

OFF
ON

OFF
 Be sure to set the frequency source setting
=
to select the analog input terminals.
Function Name
Analog Input
Voltage/Current
Select
~
=
 
setting and [AT] input for
Analog Input Configuration
[OI]
[O]
Keypad Pot
[O]
Keypad Pot
[OI]

State
ON See the table down below
OFF
Example (default input configuration shown
for –FE and –FU models; –F models require input
configuration):
7 6 5
H O OI L
+ -
See I/O specs on
= to enable the analog

Description
AT
4 3 2 1 L PLC

4-20 mA
0-10 V
page 4–6.
P24