Delta VFD11AMS21AFSHA, User Manual

Page: 202 / 445

Chapter 12 Description of Parameter Settings

MS300
(High Speed Model)
12-03-1
03 Analog Input / Output Parameter

This parameter can be set during operation.

Analog Input Selection (AVI)
Factory Setting: 1

Analog Input Selection (ACI)
Factory Setting: 0
Settings 0: No function
1: Frequency command
6: PTC thermistor input value
11: PT100 thermistor input value
 When it is frequency command, the corresponding value for 0 ~ ± 10V / 4~20 mA is 0 ~ max.
output frequency (Pr. 01-00).
 When the setting of Pr. 03-00~Pr. 03-01 is the same, the AVI will be selected first.

Analog Input Bias (AVI)
Factory Setting: 0
Settings -100.0~100.0 %
 It is used to set the corresponding AVI voltage of the external analog input 0.

Analog Input Bias (ACI)
Factory Setting: 0
Settings -100.0~100.0 %
 It is used to set the corresponding ACI voltage of the external analog input 0.

Positive / Negative Bias Mode (AVI)

Positive / Negative Bias Mode (ACI)
Factory Setting: 0
Settings 0: Zero 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: Serve bias as the center
 In a noisy environment, it is advantageous to use negative bias to provide a noise margin. It is
recommended NOT to use less than 1V to set the operation frequency.
 Reverse Setting when Analog Signal Input is Negative Frequency
Factory Setting: 0
Settings
0: Negative frequency input is not allowed. Forward and reverse run is
controlled by digital keypad or external terminal.
1: Negative frequency input is allowed. Positive frequency = forward run;
negative frequency = reverse run. Run direction can not be switched by
digital keypad or the external terminal control.
 Pr. 03-10 is used to enable reverse run command when a negative frequency (negative bias and
gain) is input to AVI or ACI analog signal input.