Delta C2000 Series User Manual page 332

Analog Frequency Command for Reverse Run
0: Negative frequency is not valid. Forward and reverse run is controlled by
Settings
1: Negative frequency is valid. Positive frequency = forward run; negative
Parameter 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 (except AUI).
Condition for negative frequency (reverse)
1. Pr03-10=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 (Pr03-18=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)"
Analog Input Gain (AVI)
Analog Input Gain (ACI)
Analog Positive Input Gain (AUI)
Analog Negative Input Gain (AUI)
Settings -500.0~500.0%
Parameters 03-03 to 03-14 are used when the source of frequency command is the analog
voltage/current signal.
Analog Input Filter Time (AVI)
Analog Input Filter Time (ACI)
Analog Input Filter Time (AUI)
Settings 0.00~20.00 sec
These input delays can be used to filter noisy analog signal.
When the setting of the time constant is too large, the control will be stable but the control response
will be slow. When the setting of time constant is too small, the control response will be faster but
the control may be unstable. To find the optimal setting, please adjust the setting according to the
control stable or response status.
Chapter 12 Description of Parameter Settings C2000 Series
digital keypad or external terminal.
frequency = reverse run. Run direction can not be switched by digital
keypad or the external terminal control.
12-03-19
Factory Setting: 0
Factory Setting: 100.0
Factory Setting: 0.01