6. Control Functions and Parameter Settings
6-49
B44-0~3
Multipump control
Multi-pump control refers to operating up to six pumps in one water system, one pump is
variable speed controlled and up to five more controlled ON/OFF by the digital outputs
provided in the VAT2000. The water pressure in the pipe system is controlled to be constant
according the setting input in the VAT2000´s PID.
As standard the drive provide control up to 3 ON/OFF controlled pumps. By using optional card
U2KV23RYO, then operation is allowed up to 5 pumps
P S O 1
U ,V,W
S p ee d co ntrolle d
P u m p
O N / O FF P u m p 1
O N / O FF P u m p 2
O N / O FF P u m p 3
O N / O FF P u m p 4
O N / O FF P u m p 5
Pr
e
s
s
u
re
t
ran
s
d
uc
e
r
P S O 2
P S O 3
P S O 4
P S O 5
0 -10 V o r 4 -20 m A
P re ssu re fe ed ba ck (A U X o r F S I)
U 2 K V 2 3R Y O
P ID
FS V o r FS I
VAT 2000
P re ssu re
settin g
C o nverter
Example of system configuration
(when operating five ON/OFF control pumps)