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Adjusting Frequency References
This section explains methods of adjusting frequency references.
K K K K
Adjusting Analog Frequency References
Gain and bias are among the parameters used to adjust analog inputs.
nRelated Parameters
Name
Param-
eter
Num-
LCD Display
ber
Signal select terminal A1
(voltage)
H3-01
Term A1 Lvl Sel
Gain (terminal A1)
H3-02
Terminal A1 Gain
Bias (terminal A1)
H3-03
Terminal A1 Bias
Multi-function analog
input terminal A2 signal
level selection
H3-08
Term A2 Signal
Multi-function analog
input terminal A2 function
H3-09
selection
Terminal A2 Sel
Gain (terminal A2)
H3-10
Terminal A2 Gain
Bias (terminal A2)
H3-11
Terminal A2 Bias
* For (-E) models.
nAdjusting Analog Frequency Reference Using Parameters
The frequency reference is input from the control circuit terminals using analog voltage and current.
If using frequency reference terminal A1 as an input terminal, perform adjustments using parameters H3-02
and H3-03. If using multi-function analog input terminal A2 as a frequency reference terminal, perform
adjustments using H3-10 and H3-11.
Description
0: Voltage limit enabled (Below 0 V is 0 V)
1: Voltage limit disabled
Set value 1 can be set for (-E) models.
Set the frequency during 10 V input as a percent,
taking max. output frequency to be 100%.
Set the frequency during 0 V input as a percent,
taking max. output frequency to be 100%.
0: Limit negative frequency settings for gain and
bias settings to 0.
1: Do not limit negative frequency settings for
gain and bias settings to 0 (i.e., allow reverse
operation).
2: 4 to 20 mA (9-bit input).
Switch current and voltage input using the switch
on the control panel.
Select multi-function analog input function for ter-
minal A2.
Set the reference capacity for each function during
10 V (20 mA) input as a percent.
Set the 100% content function selected using H3-
09 to 100%.
Set the reference capacity for each function during
0 V (4 mA) input as a percent.
Set the 100% content function selected using H3-
09 to 100%.
Adjusting Frequency References
Control Methods
Change
Setting
Factory
during
Range
Setting
Opera-
V/f
tion
*
0 or 1
0
No
A
0.0 to
100.0%
Yes
A
1000.0
-100.0
to
0.0%
Yes
A
+100.0
0 to 2
2
No
A
0 to 1F
0
No
A
0.0 to
100.0%
Yes
A
1000.0
-100.0
to
0.0%
Yes
A
+100.0
Open
V/f
Loop
with
Vec-
PG
tor
*
*
A
A
A
A
A
A
A
A
A
A
A
A
A
A
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