Adjusting Frequency References
6-
27
The frequency gain for terminal A1 is the product of H3-02 and terminal A2 gain. For example, when H3-02
is set to 100% and terminal A2 is set to 5 V, the terminal A1 frequency reference will be 50%.
Fig 6.28 Example of Frequency Gain Adjustment
Setting Precautions
The frequency gain cannot be added to the terminal A1 input voltage and so H3-05 cannot be set to 0.
Adjusting Frequency Bias Using an Analog Input
When parameter H3-09 or H3-05 is set to 0 (add to terminal A1), the frequency equivalent to the terminal A2
or A3 input voltage is added to A1 as a bias.
Fig 6.29 Frequency Bias Adjustment (Terminal A2 or A3 Input)
For example, if H3-02 is 100%, H3-03 is 0%, and terminal A2 is set to 1 V, the frequency reference from
terminal A1 when 0 V is input to A1 will be 10%.
Fig 6.30 Example of Frequency Bias Adjustment
When parameter H3-09 or H3-05 is set to D (frequency bias 2), the frequency equivalent to the terminal A2 or
A3 input voltage is added to A1 as a bias.
Fre
qu
ency reference
H3-02
H3-02
×
0.5
0
10
V
Terminal A1 inp
u
t
v
oltage
100%
50%
Frequency bias
Multi-function analog input
terminal A2 or A3 input level
100%
0 V (4 mA)
10 V (20 mA)
Terminal A2 or A3 input
Terminal A1 inp
u
t
v
oltage
Fre
qu
ency reference
H3-02
10%
Bias
0
V
10
V
