Delta VFD11AMS21AFSHA, User Manual

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Chapter 12 Description of Parameter Settings

MS300
(High Speed Model)
12-03-2
 Condition for negative frequency (reverse)
1. Pr. 03-10 = 1
2. Bias mode = Serve bias as center
3
.
Corresponded analog input gain < 0 (negative), make input frequency be negative.
In using addition function of analog input (Pr. 03-18 = 1), when analog signal is negative after
adding, this parameter can be set for allowing reverse or not. The result after adding will be
restricted by “Condition for negative frequency (reverse)”
In the diagram below:
 Black line: curve with no bias.

Gray line: curve with bias
Diagram 01
Diagram 02