ABB ACS355 - Block Diagrams

150 Program features
 Block diagrams
The figure below shows an application example: The controller adjusts the speed of a
pressure boost pump according to the measured pressure and the set pressure
reference.
ref
k
ti
td
i
dFiltT
errVInv
oh1
ol1
Speed
reference
%ref = 4010
…
.
.
.
AC T PA R FU N C D R IV E
E N T E R
LO C
RE M
RE S E T
RE F
A C S 6 0 0
0 . . . 1 0 b a r
4 . . . 2 0 m A
3
3
2
Drive
PID control block diagram
Example:
Pressure boost pump
4001
4002
4003
4004
4005
PIDmin
PIDmax
4014
4021
AI1
AI2
IMOT
%ref
Actual values
PID
Switch
9904 = 0
Frequency
reference