103
4. Parameter description
Parameter
●
If P.178=0, the value of P.179
、
P.180 and P.181is invalid. If the value of P.178 is not 0, the PID
sleep function is selected. When the feel-back value and the target feel-back absolute value is
lower than
sleep detect deviation and continue sleep detect duration time P.179, the inverter will
minish the output frequency gradually, when the output frequency lower than outage level P.181,
the inverter will brakes stop. When the feel-back 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 feel-back value is larger than 95% of the target feel-back value and is lower
than 105% of the target feel-back value, continue 10s, the inverter will minish the
output frequency gradually. When the output frequency is lower than 40Hz, the
inverter will brakes stop. When the feel-back value is lower than 90% of the target
feel-back value, the inverter will revival, the output frequency of inverter will select
PID control function again.
<Setting>
•
When P.170 = 0, PID is forbidden.
•
When P.170 = 1, the target value is setting by P.225, the feedback value is setting by voltage which
from terminal 2-5.
•
When P.170 = 2, the target value is setting by P.225, the feedback value is setting by current which
from terminal 4-5.
•
When P.171 = 0, the negative feedback control is selected, error is equal to the feedback value
minus the target value. When the frequency is increase, it will result in the feedback value
increasing, so the setting value will be selected.
•
When P.171 = 1, the
positive
feedback control is selected, error is equal to the target value minus
the feedback value. When the frequency is decrease, it will result in the feedback value decreasing,
so the setting value will be selected.
•
PID gain easy setting:
(1). Using pure proportional control, increasing PID proportion Gain progressively, the system to
gain critical concussion.
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