7
0
1
Parameter Description
Parameter Description
When the feedback value is lower than the abnormal deviation level and continue exception
duration time P.176, the PID is exceptional. This time the screen will display
, and it will
select freedom or brakes according to P.177.
For example: If P.175=60%, P.176=30s, P.177=0, and the feel-back value is lower than 60% of the
target feel-back value and continue 30s, the screen will display
and freedom
stop.
•
If P.178=0, the values of P.179, P.180 and P.181 are invalid. If the value of P.178 is not 0, PID sleep
function is selected. When the feedback value and the target feedback absolute value is lower than
the sleep detect deviation and continue sleep detect duration time P.179, the output frequency will
be diminished gradually by the inverter. When the output frequency is lower than the outage level
P.181, the inverter will be stopped. When the feedback value is lower than revival level P.180, the
output frequency of inverter will select PID control function again.
For example: P.178=5%, P.179= 30s, P.180=90%, P.181=40Hz.
When the feedback value is larger than 95% of the target feedback value and is lower
than 105% of the target feedback value for 10s continuously, the output frequency will
be diminished gradually by the inverter. When the output frequency is lower than
40Hz, the inverter will be stopped. When the feedback value is lower than 90% of the
target feedback value, the inverter will revival, and the output frequency of the
inverter will select PID control function again.
contravariance
convertor
Output
frequency
5
4
IM
U
V
W
feedback
quantity
R
S
+
-
Set
frequency
K
I
=P.173
K
P
=P.172
K
D
=P.174
+
+
+
limit
P.182
PID
module
e(t)
Feedback value
2
filter
T
the target
feel-back
value
the feel-back
value
Maximum frequency
P.176
0HZ
the target feel-back value
Revival level
below
P.179
P.179
feedback
actually
Output
frequency
Outage
level
0HZ
Revival
process
Outage
proccess
Minishing the output
frequency gradually
