Hitachi CONVENTION 14 Instruction Manual page 171

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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 A001 = 01 to enable the analog
terminal set for controlling the inverter frequency.
Option Terminal
Code Symbol
16 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 A005 setting and [AT] input
for analog input activation.
A005 [AT] Input
02
OFF
03
OFF
04 (ignored)
05 (ignored)
Be sure to set the frequency source setting
A001=01 to select the analog input terminals.
NOTE: You cannot use both the [O] and [OI] inputs at the same time on the X200
inverter.
Function Name
Analog Input
Voltage/Current
Select
C001~C005
A001 = 01
Analog Input Configuration
ON Keypad Pot
[O]
ON Keypad Pot
[OI]
[O]
[OI]
State
ON See the table down below
OFF
Example (default input configuration shown
for –FU models; –FE models require input
configuration—see
5
AM H O OI L
+ -
See I/O specs on
Description
page 3–49):
AT
4 3 2 1 L PCS P24
4-20 mA
0-10 V
page 4–6.