Hitachi SJ Series User Manual page 172

Chapter 12
12.4.3 Operation with analogue signal from
terminal block
Enabling frequency command from terminal block
Ｑ
• Want to give a frequency command from an
external device.
• Want to use a frequency setter to change the
frequency.
• Want to connect a variable resistor to change the
frequency.
Ａ
• A frequency command is given by input from the
terminal block.
• The inverter has three kinds of external analogue
input.
Terminal Input range
connection
Ai1-L 0-10 V/0-20 mA
switchable
Ai2-L 0-10 V/0-20 mA
switchable
Ai3-L -10~10V
• For each input, relation between the input signal and
the frequency command can be set independently.
See "12.24 Things that can be done with external
signal input."
• To add/subtract a command, the auxiliary speed
command [AA102] and operator [AA105] should
also be set. [Ai3] can be added to [Ai1] and [Ai2]
without choosing an operator in the [Cb-22][Ai3]
terminal selection. For details, see "12.24 Things
that can be done with external signal input."
Parameters
Item Parameters
Main speed
command [AA101]
selection
*1) Optional P1-AG is necessary.
！
• The output of the inverter requires not only a
• Note that the voltage input and the current input are
• For adjustment of the analogue input, see "12.24
▼
• First, the voltage SW and current SW are switched
Switching method
SW1 on the board is
switched.
SW2 on the board is
switched.
-
• Next, a command destination for the parameter
[AA101] is set.
Data
01
02
03
04
05
06
12-4-3
frequency command but also an operation
command.
switched from each other by the terminal block
switch.
Things that can be done with external signal input."
when the wiring is made.
(SW4) (SW3) (SW2)
Ao1 Ai2
Ao2
20mA 20mA 20mA
10V 10V 10V
Description
Input between Ai1 and L enabled.
Input between Ai2 and L enabled.
Input between Ai3 and L enabled.
Input between Ai4 and L enabled. *1)
Input between Ai5 and L enabled. *1)
Input between Ai6 and L enabled. *1)
Inverter Functions
(SW1) (SW5) (SW6)
Ai1
P.SEL
20mA EX SRC
IN SINK
10V