Delta C2000 series User Manual page 275

 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.
In the diagram below: Black color line: Frequency. Gray color line: Voltage
Frequency
60Hz
54Hz
-V
10 9 8 7 6 5 4 3 2 1
Frequency
60Hz
6Hz
-V
10 9 8 7 6 5 4 3 2 1
Frequency
60Hz
54Hz
6Hz
-V
10 9 8 7 6 5 4 3 2 1
Chapter 12 Description of Parameter SettingsC2000 Series
4: Serve bias as the center
V
1 2 3 4 5 6 7 8 9 10
Pr.03-03=10%
Pr.03-07~03-09 (Positive/Negative Bias Mode)
V
Pr.03-10
1 2 3 4 5 6 7 8 9 10
Pr.03-11Analog Input Gain (AVI)=100%
Pr.03-03=10%
Pr.03-07~03-09 (Positive/Negative Bias Mode)
Pr.03-10
V
1 2 3 4 5 6 7 8 9 10
Pr.03-11 Analog Input Gain (AVI) = 100%
12-
Pr.03-03=10%
Pr.03-07~03-09 (Positive/Negative Bias Mode)
0: No bias
Lower than or equal to bias
1:
2: Greater than or equal to bias
3: T he absolute value of the bias voltage
while serving as the center
4: Serve bias as the center
Pr.03-10 (Analog F requency Command for Reverse Run)
0: Negative frequency is not valid.
F orward and reverse run is controlled
by digital keypad or external terminal.
1: Neagtive frequency is valid. Positive
frequency = forward run; negative
frequency = reverse run. Direction
can not be switched by digital keypad or
external teriminal control.
Pr.03-11 Analog Input Gain (AVI)= 100%
0: No bias
Lower than or equal to bias
1:
2: Greater than or equal to bias
3: T he absolute value of the bias voltage
while serving as the center
4: Serve bias as the center
(Analog F requency Command for Reverse Run)
0: Negative frequency is not valid.
F orward and reverse run is controlled
by digital keypad or external terminal.
1: Neagtive frequency is valid. Positive
frequency = forward run; negative
frequency = reverse run. Direction
can not be switched by digital keypad or
external teriminal control.
0: No bias
Lower than or equal to bias
1:
2: Greater than or equal to bias
3: T he absolute value of the bias voltage
while serving as the center
4: Serve bias as the center
(Analog F requency Command for Reverse Run)
0: Negative frequency is not valid.
F orward and reverse run is controlled
by digital keypad or external terminal.
1: Neagtive frequency is valid. Positive
frequency = forward run; negative
frequency = reverse run. Direction
can not be switched by digital keypad or
external teriminal control.
60