149
Speed setting by analog input (terminal 2, 4)
(2) Perform operation by analog input selection
The speed setting signal inputs 0 to 5VDC (or 0 to 10VDC) across the
terminals 2 and 5. The 5V (10V) input is the maximum output.
The power supply 5V can be input by either using the internal power
supply or preparing an external power supply. Prepare an external
power supply to input the power supply 10V. For the built-in power
supply, terminals 10 and 5 provide 5VDC output.
When inputting 10VDC to the terminal 2, set "0" or "10" in
Pr. 73
. (The
initial value is 0 to 5V)
Setting "1 (0 to 5VDC)" or "2 (0 to 10VDC)" in
Pr. 267
and a voltage/
current input switch in the "
V
" position changes the terminal 4 to the
voltage input specification. When the AU signal turns ON, the terminal
4 input becomes valid.
REMARKS
The wiring length of the terminal 10, 2, 5 should be 30m at maximum.
(3) Perform operation by analog input selection
When the pressure or temperature is controlled constantly by a fan,
pump, etc., automatic operation can be performed by inputting the
output signal 4 to 20mADC of the adjuster across the terminals 4 and
5.
The AU signal must be turned ON to use the terminal 4.
Reversible operation example
(4) Perform forward/reverse rotation by analog input
(polarity reversible operation)
Setting "10" or "11" in
Pr. 73
and adjusting
Pr. 125
(Pr. 126)
Terminal 2
speed setting gain speed
(
Terminal 4 speed setting gain speed
) and
C2 (Pr.
902)
Terminal 2 speed setting bias speed
to
C7 (Pr. 905)
Terminal 4 speed
setting gain
makes reverse operation by terminal 2 (terminal 4) valid.
Example)When performing reversible operation by terminal 2 (0 to 5V)
input
1) Set "11" in
Pr. 73
to make reversible operation valid.
Set speed at maximum analog input in
Pr. 125 (Pr. 903)
2) Set 1/2 of the value set in
C4 (Pr. 903)
in
C3 (Pr. 902)
.
3) Reversible operation is performed when 0 to 2.5VDC is input and
forward rotation when 2.5 to 5VDC.
NOTE
When reversible operation is set, be aware of reverse rotation operation when analog input stops (only the start
signal is input).
When reversible operation is valid, reversible operation (0 to 4mA: reverse operation, 4mA to 20mA: forward
operation) is performed by terminal 4 in the initial setting.
Parameters referred to
Pr. 125 Terminal 2 speed setting gain speed, Pr. 126 Terminal 4 speed setting gain speed
Pr. 561 PTC thermistor protection level
C2 (Pr. 902) Terminal 2 speed setting bias speed to C7 (Pr. 905) Terminal 4 speed setting gain
Pr. 178 to Pr. 182 (input terminal function selection)
STF
Drive unit
Forward rotation
Speed setting
0 to 5VDC
SD
10
2
5
Connection diagram using terminal 2 (0 to 5VDC)
STF
Drive unit
Forward rotation
0 to 10VDC
SD
Connection diagram using terminal 2 (0 to 10VDC)
Speed
setting
2
5
Voltage input
equipment
Terminal
Drive unit Built-
in Power Supply
Voltage
Speed Setting
Resolution
Pr. 73
(terminal 2 input
power)
10
5VDC
6r/min / 3000r/min
0 to 5VDC input
STF
Drive unit
Forward rotation
Speed setting
SD
4
5
AU
Connection diagram using terminal 4 (4 to 20mADC)
4 to 20mADC
Current input
equipment
2.5V
C3(Pr. 902)
Pr. 125
C4(Pr. 903)
C2(Pr. 902)
5V
Reverse
rotation
Forward
rotation
Set speed (r/min)
Terminal 2
input (V)
0
Speed setting signal
Not
reversible
Reversible
Содержание FR-D720-0.2K-G
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Страница 294: ...291 APPENDIX This chapter provides the APPENDIX of this product Always read the instructions before using the equipment ...