149
Frequency 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 frequency at maximum
analog input
(Pr. 125, Pr. 126)
Set
Pr. 125 (Pr. 126)
when changing frequency
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 inverter to set the output frequency,
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 frequency at 0V)
Set the output frequency in
Pr. 125
for the frequency
command voltage set with
Pr. 73
Analog input
selection
.
Set the bias frequency of the terminal 4 input using
C5
(Pr. 904).
(It is initially-set to the frequency at 4mA)
Using
Pr. 126
, set the output frequency relative to
20mA of the frequency command current (4 to
20mA).
There are three methods to adjust the frequency
setting voltage (current) bias/gain.
a) Method to adjust any point by application of a
voltage (current) to across terminals 2-5 (4-5)
b) Method to adjust any point without application of
a voltage (current) to across terminals 2-5 (4-5)
c) Method to adjust frequency 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
C2(Pr. 902)
C3(Pr. 902)
C4(Pr. 903)
50Hz
Output frequency (Hz)
0
0
Frequency setting signal
100%
10V
Initial value
Bias
0
5V
Pr. 125
Gain
C5(Pr. 904)
C6(Pr. 904)
C7(Pr. 905)
50Hz
Pr. 126
0
Frequency setting
signal
100%
Initial value
Bias
Gain
0
20
4
20mA
Output frequency (Hz)
Summary of Contents for FR-D700 Series
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