Function of VS 300
27
Doku-Version 2.05 - Firmware 2.10 - 15. September 2017
4.3.6
Determining the setpoint with speed controller
Low-pressure detected by an A/D converter is compared with the setpoint. The following relationship applies:
Control
error
Additionally a speed setpoint is determined. The following relationship applies for calculation:
U
setp
P
Action
U
Setp
= Frequency changer setpoint (0-10 V)
P
Action
= Proportional action of controller
I
Action
= Integral action of controller
Control error:
P
Action
t
0
_Act
2
t
0_Act
= Current value of t
0
t
0_Setp
= Setpoint for t
0
The P action of the controller responds directly to control errors. The I action avoids sustained control errors.
I
Action
I
Actionl
t
0
_Act
t
0
_Setpl
8
adjusting diff.
20
Adjusting differential = Definable controller speed
Summary of Contents for VS 300
Page 8: ...vi Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Page 18: ...System Design of VS 300 10 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Page 22: ...Application of VS 300 14 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Page 160: ...Decommissioning and disposal 152 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Page 166: ...Alarms and Messages of VS 300 158 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Page 170: ...162 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...