174
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 5V, 0 to 10V or 4 to 20mADC, and
the output frequency.
Set the bias frequency 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 2-5 (4-5)
(b) Method to adjust any point without application
of a voltage (current) across terminals 2-5 (4-5)
(c) Method to adjust speed only without adjustment
of voltage (current)
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
3000r/min
0
0
Speed setting
signal
100%
10V
Initial value
Bias
0
5V
Pr.125
Gain
Rotation speed (r/min)
C2(Pr.902)
C3(Pr.902)
C4(Pr.903)
0
100%
0
20
4
20mA
Speed setting
signal
Initial value
Bias
Gain
Rotation speed (r/min)
Pr.126
C5(Pr.904)
C6(Pr.904)
C7(Pr.905)
3000r/min
Summary of Contents for FR-E700EX
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