104
4. Parameter description
Parameter
● When the feedback value is lower than exceptional deviation level and continues for exceptional
continuance time P.176, the PID is exceptional. At this time the screen will display
, and
it
will select freedom or brakes according to P.177.
For example: when P.175=60%, P.176=30s, P.177=0, when the feedback value is lower than 60%
of the target feedback value and continues for 30s, the screen will display
, and
the inverter will select freedom stop.
the target
feel-back
value
the feel-back
value
Maximum frequency
P.176
0HZ
• If P.178=0, the value of P.179, P.180 and P.181 is invalid. If the value of P.178 is not 0, the PID
sleep function is selected. When absolute value which the feedback value minus the target feedback
value is lower than sleep detect deviation and continues for sleep detect time P.179, the inverter will
minish the output frequency gradually, when the output frequency is lower than outage level P.181,
the inverter will brakes stop. When the feedback value is lower than revival level P.180, the output
frequency of inverter will be controled by PID 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, the inverter will minish the output frequency
gradually after 10s. When the output frequency is lower than 40Hz, the inverter will
brakes stop derictly. When the feedback value is lower than 90% of the target
feedback value, the inverter will revive, and the output frequency of inverter will be
controlled by PID again.
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
