Momentary Power Loss Function - YASKAWA E7 Drive User Manual

H3-02 = 100%
H3-02 = 100%
Output
Output
Frequency
Frequency
H3-03 = 0%
H3-03 = 0%
Before Gain Applied
H3-10 Terminal A2 Gain Setting
H3-11 Terminal A2 Bias Setting
The gain and bias of analog input A2 are adjusted by H3-10 & H3-11 respectively. See the example below:
Problem: A 0-20mA signal is desired for a PI Feedback signal, instead of the factory default 4-20mA signal.
Solution: H3-10 would be unchanged since the top end, 100% feedback, is still equal to 20mA. The Drive needs to have 0mA
equate to 0 % feedback. This is done by setting H3-11=25%.

Momentary Power Loss Function

L2-01 Momentary Power Loss Detection Selection
L2-02 Momentary Power Loss Ride-thru Time
The Drive allows different responses to momentary power losses. The setting of L2-01 determines whether the Drive will
attempt to restart after a short loss of incoming AC power and for what length of time this capability remains active.
If L2-01=0, the Drive detects a UV1 fault and restarting after any momentary power loss is impossible. The Drive cannot
restart until the external run command is removed and the UV1 fault is reset.
0V
0V
10V 10V
20mA
4mA
4mA
20mA
Fig 5.14 Terminal A1 and A2 Analog Inputs Gain Adjustment Example
H3-11
Fig 5.15 Analog Input Bias Adjustment
Basic Programming 5 - 17
H3-02 = 100%
200%
H3-02 = 200%
Output
Output
Frequency
Frequency
H3-03 = 0%
H3-03 = 0%
0V 0V
4mA
4mA
After Gain Applied
H3-10
10V
10V
20mA 20mA