Delta MS300 Series User Manual page 351

Chapter 12 Descriptions of Parameter SettingsMS300
03-72
Negative AVI Proportional Mid-point

Settings
03-73
Negative AVI Voltage Highest Point

Settings
03-74
Negative AVI Proportional Highest Point

Settings
 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. There is a linear calculation between two points.
 The output percentage becomes 0% when the negative voltage AVI input value is lower than the
lowest point setting.
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%.
-100.00–100.00%
(valid when Pr.03-28 sets as -10–10 V)
-10.00–0.00 V
(valid when Pr.03-28 sets as -10–10 V)
-100.00–100.00%
(valid when Pr.03-28 sets as -10–10 V)
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Default: -50.00
Default: -10.00
Default: -100.00