153
Speed setting by analog input (terminal 2, 4)
(3) Analog input display unit changing
(Pr. 241
)
You can change the analog input display unit (%/V/mA) for analog input bias/gain calibration.
Depending on the terminal input specification set to
Pr. 73
,
Pr. 267
, and voltage/current switch, the display units of
C3 (Pr.
902), C4 (Pr. 903), C6 (Pr. 904), C7 (Pr. 905)
change as shown below.
(1) Change the speed at maximum analog
input
(Pr. 125, Pr. 126)
Set
Pr. 125 (Pr. 126)
when changing speed setting
(gain) of the maximum analog input voltage
(current) only. (
C2 (Pr. 902)
to
C7 (Pr. 905)
setting
need not be changed)
(2) Analog input bias/gain calibration
(C2 (Pr. 902) to C7 (Pr. 905))
The "bias" and "gain" functions are used to adjust
the relationship between the input signal entered
from outside the drive unit to set the rotation speed,
e.g. 0 to 5VDC, 0 to 10VDC or 4 to 20mADC, and
the rotation speed.
Set the bias speed of the terminal 2 input using
C2
(Pr. 902)
.
(It is initially set to the speed at 0V)
Set the rotation speed in
Pr. 125
for the speed
command voltage set with
Pr. 73
Analog input
selection
.
Set the bias speed of the terminal 4 input using
C5 (Pr.
904).
(It is initially set to the speed at 4mA)
Using
Pr. 126
, set the rotation speed relative to
20mA of the speed command current (4 to 20mA).
There are three methods to adjust the speed setting
voltage (current) bias/gain.
a) Method to adjust any point by application of a
voltage (current) across terminals 2 and 5 (4
and 5)
page 155
b) Method to adjust any point without application of
a voltage (current) across terminals 2 and 5 (4
and 5)
page 155
c) Method to adjust speed only without adjustment
of voltage (current)
page 156
NOTE
When voltage/current input signal for terminal 4 was switched using
Pr. 267
and voltage/current input switch, perform
calibration without fail.
Analog Command (terminal 2, 4)
(depending on
Pr. 73, Pr. 267,
and
voltage/current input switch)
Pr. 241 =
0 (initial value)
Pr. 241 =
1
0 to 5V input
0 to 5V
0 to 100% (0.1%) display
0 to 100%
0 to 5V (0.01V) display
0 to 10V input
0 to 10V
0 to 100% (0.1%) display
0 to 100%
0 to 10V (0.01V) display
0 to 20mA input
0 to 20mA
0 to 100%(0.1%) display 0 to 100%
0 to 20mA (0.01mA) display
Parameters referred to
Pr. 73 Analog input selection, Pr. 267 Terminal 4 input selection
C2(Pr. 902)
C3(Pr. 902)
C4(Pr. 903)
3000r/min
0
0
Speed setting signal
Rotation speed
100%
10V
Initial value
Bias
0
5V
Pr. 125
Gain
(r/min)
C5(Pr. 904)
Pr. 126
Initial value
Bias
Gain
3000r/min
0
Speed setting signal
100%
0
20
4
20mA
0
1
5V
0
2
10V
C6(Pr. 904)
C7(Pr. 905)
Rotation speed
(r/min)
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 ...