Speed
DIN 4/ID 419
DIN 5/ID 420
DIN 6/ID 421
Preset speed 5 (ID 128)
1
0
1
Preset speed 6 (ID 129)
0
1
1
Preset speed 7 (ID 130)
1
1
1
See also parameters
ID 105
and
ID 106
.
Parameter value is automatically limited to
Maximum Frequency
(
ID 102
).
10.29 (ID 131) I/O Frequency Reference Selection
Location in the menu:
P2.1.12
(Local/Remote Control Application)
Use this parameter to select the reference source when the control place is I/O B.
See the values of the parameter
ID 117
,
10.15 (ID 117) I/O Frequency Reference Selection
10.30 (ID 132) PID Controller D-time
Location in the menu:
P2.1.14
(PID Control Application and Pump and Fan Control Application)
Use this parameter to adjust the derivation time of the PID controller.
If this parameter is set to 1.00 second, a change of 10% in the error value during 1.00 s causes the controller output to change by
10.00%. If the parameter value is set to 0.00 s, the PID controller operates as PI controller.
See the examples.
Example 1
To reduce the error value to zero, with the given values, the AC drive output behaves as follows:
Given values:
P2.1.12, P = 0%
P2.1.13, I-time = 1.00 s
P2.1.14, D-time = 0.00 s
Minimum frequency = 0 Hz
Error value (setpoint – process value) = 10.00%
Maximum frequency = 50 Hz
In this example, the PID controller operates practically as I-controller only.
According to the given value of parameter
P2.1.13
(I-time), the PID output increases by 5 Hz (10% of the difference between the
maximum and minimum frequency) every second until the error value is 0.
Hz
t
1s
Error=10%
10%
10%
10%
10%I-Part=5 Hz/s
I-Part=5 Hz/s
I-Part=5 Hz/s
I-Part=5 Hz/s
I-Part=5 Hz/s
PID output
Error value
e
3
0
b
h
0
2
5
.1
0
Illustration 28: PID Controller Function as I-controller
Example 2
Given values:
P2.1.12, P = 100%
AB296635287482en-000301 / DPD00903 | 175
Danfoss A/S © 2023.02
Parameter Descriptions
VACON® NX All-in-One
Application Guide
Содержание VACON NX
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