YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 160

Adjusting Frequency Bias Using an Analog Input
When constant H3-09 is set to 0 (Frequency Bias), the frequency equivalent to the terminal A2 input voltage is
added to A1 as a bias.
Fig 6.22 Frequency Bias Adjustment (Terminal A2 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%.
Frequency reference
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Frequency bias
0V (4 mA/0 mA)
Adjusting Frequency References
Multi-function analog input
terminal A2 input level
Terminal A1 input voltage
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