ABB ACQ810 - Pump Control Features; PID Control

58 Program features
Pump control features
 PID control
There is a built-in PID controller in the drive. The controller can be used to control
process variables such as pressure, flow or fluid level.
In process PID control, a process setpoint (reference) is connected to the drive
instead of a speed reference. A process actual value (feedback) is also brought back
to the drive. The process PID control adjusts the drive speed in order to keep the
measured process quantity (actual value) at the desired level (setpoint). The control
program allows switching between two different setpoints and actual values.
The simplified block diagram below illustrates the process PID control. For a more
detailed diagram, see page 372.
Settings
Parameter groups 12 Operating mode (page 141), 27 Process PID (page 187), 28
Procact sel (page 191), and 29 Setpoint sel (page 193).
0
AI
FBA
29.04
Pointer
Setpoint
sources
29.02
04.24
0
AI
FBA
29.05
Pointer
29.03
29.01
Setpoint 1/2
selection
04.23
27.01
0
04.25
27.30
27.31
27.12
27.13
27.14
27.15
27.16
27.18
27.19
PID
04.05
0
AI
FBA
05.05
Pointer
Actual value
sources
28.02
0
AI
FBA
05.05
Pointer
28.03
28.01
04.21
04.20
Act1
Add
Sub
…
Sqrt add
28.04
04.22
Actual value
1/2 selection