Analog Input Current/Voltage Select - Hitachi SJ300 Series Instruction Manual

4–26
Using Intelligent Input Terminals
Analog Input
Current/Voltage
Select
The [AT] terminal operates in conjunction with parameter setting A005 to determine the analog
input terminals that are enabled for current or voltage input. Setting A006 determines whether
the signal will be bipolar, allowing for a reverse direction range. Note that current input signal
cannot be bipolar and cannot reverse direction (must use [FW] and [RV] command with current
input operation). The following table shows the basic operation of the [AT] intelligent input.
Please refer to "Analog Input Operation" on page 4–59
configuration, and the operating characteristics of analog inputs.
Opt.
Symbol Function Name
Code
16 AT Analog Input
Voltage/current
Select
C001, C002, C003, C004,
Valid for
C005, C006, C007, C008
inputs:
A001 = 01
Required
A005 = 00 / 01
settings:
A006 = 00 / 01 / 02
Notes:
• Be sure to set the frequency source setting
A001=01 to select the analog input terminals.
for more information on bipolar input
Input
Description
State
ON • With A005 = 00, [AT] will enable
terminals [OI]–[L] for current input,
4 to 20mA
• With A005=01, [AT] will enable termi-
nals [O2]–[L] for voltage input
OFF Terminals [O]–[L] are enabled for voltage
input (A005 may be equal to 00 or 01) in
this case
Example: (Default input configuration
shown—see page 3–47. Jumper position
shown is for –xFU/-xFR models; for –xFE
models, see page 4–12.)
TH FW CM1
8
P24 PLC CM1
7
See I/O specs on page 4–9.
AT
5 3 1
6 4 2