Hitachi SJ Series, User Manual

Page: 172 / 786

12-4-3
Chapter 12 Inverter Functions
12.4.3 Operation with analogue signal from
terminal block
Enabling frequency command from terminal block
• 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 frequency command is given by input from the
terminal block.
• The inverter has three kinds of external analogue
input.
• 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
*1) Optional P1-AG is necessary.
• The output of the inverter requires not only a
frequency command but also an operation
command.
• Note that the voltage input and the current input are
switched from each other by the terminal block
switch.
• For adjustment of the analogue input, see “12.24
Things that can be done with external signal input.”
• First, the voltage SW and current SW are switched
when the wiring is made.
• Next, a command destination for the parameter
[AA101] is set.
Terminal
connection Input range Switching method
Ai1-L 0-10 V/0-20 mA
switchable SW1 on the board is
switched.
Ai2-L 0-10 V/0-20 mA
switchable SW2 on the board is
switched.
Ai3-L -10~10V -
Item Parameters Data Description
Main speed
command
selection
[AA101]
01 Input between Ai1 and L enabled.
02 Input between Ai2 and L enabled.
03
Input between Ai3 and L enabled.
04 Input between Ai4 and L enabled. *1)
05 Input between Ai5 and L enabled. *1)
06 Input between Ai6 and L enabled. *1)
Ｑ
Ａ
！
▼
S
W
4
S
W
3
S
W
2
S
W
1
S
W
5
S
W
6
10V
20mA
10V
20mA
10V
20mA
10V
20mA
IN
EX
SINK
SRC
Ao2 Ao1
Ai2 Ai1
P.SEL
(SW4) (SW3) (SW2) (SW1) (SW5) (SW6)