Chapter 12 Description of Parameter Settings
MH300
Pr.03-69–Pr.03-74 are valid when Pr.03-28 sets as -10–10 V.
When you set the negative voltage AVI to the Frequency command, -100% corresponds to Fmax
(Pr.01-00 Maximum Operation Frequency) and the motor runs in the reverse direction.
The requirement for these three parameters (Pr.03-69, Pr.03-71 and Pr.03-73) is Pr.03-69 <
Pr.03-71 < Pr.03-73. The values for three proportional points (Pr.03-70, Pr.03-72 and Pr.03-74)
have no limits. Values between two points are calculated by a linear equation.
The output % becomes 0% when the negative AVI input value is lower than the lowest point setting.
For example:
If Pr.03-69 = -1 V; Pr.03-70 = 10%, then the output becomes 0% when the AVI input is ≥
-1 V.
If the AVI input swings between -1 V and -1.1 V, drive’s output frequency oscillates between 0%
and 10%.
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