Delta VFD2A8MS21ANSAA

Chapter 12 Descriptions of Parameter SettingsMS300
322

03-03
AVI Analog Input Bias
Default: 0
Settings
-100.0–100.0%
 Sets the corresponding AVI voltage for the external analog input 0.

03-04
ACI Analog Input Bias
Default: 0
Settings
-100.0–100.0%
 Sets the corresponding ACI current for the external analog input 0.

03-07
AVI Positive / Negative Bias Mode

03-08
ACI Positive / Negative Bias Mode
Default: 0
Settings
0: No bias
1: Lower than or equal to bias
2: Greater than or equal to bias
3: The absolute value of the bias voltage while serving as the center
4: Bias serves as the center
 Using negative bias to set the frequency greatly reduces the noise interference. In a noisy
environment, do NOT use signals less than 1 V to set the drive’s operation frequency.

03-10
Reverse Setting when Analog Signal Input is Negative Frequency
Default: 0
Settings
0: Negative frequency input is not allowed. The digital keypad or external
terminal controls the forward and reverse direction.
1: Negative frequency input is allowed. Positive frequency = run in a forward
direction; negative frequency = run in a reverse direction. The digital
keypad or external terminal control cannot change the running direction.
 Use this parameter only for AVI or ACI analog input.