Parameter Description
Parameter Description
120
2. When the feedback signal need to be revised by the user:
Please adjust the feedback signal to a certain value and then calculate the proportion of the
value to the feedback range, then write the proportion value into P.223.
After that, adjust the feedback signal to a new value and then calculate the proportion of the
value to the feedback range, then write the proportion value into P.224.
Example: When the user’s feedback range is 0~8V:
When the feedback signal is adjusted to 1V, P.223 = (1 / 8) * 100.0 = 12.5
，
When the feedback signal is adjusted to 6V, P.224= (6 / 8) * 100.0 = 75.0
Note: The actual feedback signal must be connected and the value of P.170 must be set before
revising like this.
• The instruction for the target pressure given by external analog terminal:
1.
When the target value is set by terminal 2-5
When P.73 = 0, the given range is 0~5V corresponding to 0~100%;
When P.73 = 1, the given range is 0~10V corresponding to 0~100%.
2.
When the target value is set by terminal 4-5
The given range is 4~20mA corresponding to 0~100%.
Example: Set P.170 = 1
，
P.171 = 0
，
P.225 = 9999.
It indicates that the PID target value is given by the current of terminal 4-5 (4~20mA).
If 8mA is given by the user, the corresponding given proportion is (8-4)/ (20-4) * 100.0= 25.0.
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
●
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.
