Delta VFD-E Series - Page 215

Chapter 4 Parameters 
4-160
Frequenc
y
T
h
e
l
i
m
i
t
o
f
d
e
c
e
l
.
t
i
m
e
frequency calculated by PID
output
frequency
Time
The limit of
accel. time
10.16
Wake up
Frequency
10.15
Sleep
Frequency
01.05
Min. Output
Frequency
10.14 Sleep/wake up detection time
Fmin
Fsleep
Fcmd=0
Fout = 0
lower bound
of frequency
Fmin<Fsleep<
lower bound
of frequency
 When Pr. 01.05min. output frequency ≦ PID frequency (H) ≦ Pr.01.08 lower bound of
frequency and sleep function is enabled (output frequency (H) < Pr.10.15 sleep frequency and
time > Pr.10.14 detection time), frequency will be 0 (in sleep mode). If sleep function is
disabled, output frequency(H) = Pr.01.08 lower bound frequency.
NOTE
The common adjustments of PID control are shown as follows:
Example 1: how to have stable control as soon as possible?
Please shorten Pr.10.03 (Integral Time (I)) setting and increase Pr,10.04(Differential Control (D))
setting.
Respons
e
Time
before adjustment
after adjustment