YASKAWA Varispeed G7 Series Instruction Manual page 263

Adjusting Frequency Gain Using an Analog Input
When H3-09 or H3-05 is set to 1 (frequency gain), you can adjust the frequency gain using the analog input
terminal A2 or A3.
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%.
Adjusting Frequency Bias Using an Analog Input
When constant 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.
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%.
-30
6
Frequency gain
Fig 6.27 Frequency Gain Adjustment (Terminal A2 Input)
Frequency reference
100%
50%
0 10 V
Frequency bias
Fig 6.28 Frequency Bias Adjustment (Terminal A2 or A3 Input)
Multi-function analog input
terminal A2 input level
H3-02
H3-02 0.5
Terminal A1 input voltage
Multi-function analog input
terminal A2 or A3 input level