![Moeller DF6-340 Series Скачать руководство пользователя страница 130](http://html.mh-extra.com/html/moeller/df6-340-series/df6-340-series_hardware-and-engineering_1819389130.webp)
01/02 AWB8230-1413GB
PID control
127
Temperature control
With the flow control in the previous example, the frequency
inverter’s output frequency increases if the feedback signal is less
than the setpoint and falls if the feedback signal is greater than the
setpoint. With temperature control, the opposite behaviour must
be implemented: if the temperature is above the setpoint, the
inverter must increase its output frequency to increase the speed
of the connected fan.
The following figure contains an example for temperature control
with the two setpoints 20 and 30 °C:
Figure 126: Example of temperature control
w: Setpoint value, 4-bit digital
x: Feedback actual value (50 °C at 10 V)
B1: Measured value converter
P1: Temperature sensor
a
Fan
PNU
Meaning in PID control mode
Value
Notes
F001
Setpoint
20
Direct input of “20 °C”, as the scaling
factor has been set
A001
Frequency setpoint input
02
Keypad
A011
Feedback percentage actual value for lower acceptance threshold (units: %)
100
100 %
A012
Feedback percentage actual value for upper acceptance threshold (units: %)
0
0 %
A013
Lower acceptance threshold for voltage or current on the actual value input
(in %)
0
0 %
A014
Upper acceptance threshold for voltage or current on the actual value input
(in %)
100
100 %
A021
Digitally adjustable setpoint value 1
30
30 °C
A071
PID control active/inactive
01
PID mode active
A072
P component of the PID control
–
Application-dependent
A073
I component of the PID control
–
A074
D component of the PID control
–
A075
Setpoint factor of the PID control
0.5
100 % at 50 °C
A076
Input actual value signal for PID control
01
Feedback from O-L terminal
w
B1
P1
x
0... +10 V
H
G1
a
M
3
~
100%
0
4 V
40 %
10 V
100 %
60%
40%
6 V
60 %
20 °C
50 °C
30 °C
efesotomasyon.com - Klockner Moeller - inverter