Delta Electronics VFD-EL series User Manual

Revision 2016/03, 6ELE, V1.14
4-89
set point
feedbac k val ue
10.25
10.26
 Example: suppose that the set point of constant pressure control of a pump is 4kg, Pr.10.22 is set to 5%,
Pr.10.23 is set to 15 seconds, Pr.10.24 is set to 25%, Pr.10.25 is set to 3% and Pr.10.26 is set to 0.5
seconds. It means that offset is 0.2kg (4kgX5%=0.2kg), i.e. when feedback value is higher than 3.8kg for a
time exceeding 15 seconds, the AC motor drive will decelerate to stop (this deceleration time will act
according to Pr.01.12). When the feedback value is less than 3.8kg, the AC motor drive will start to run.
 Status 1: Suppose that the AC motor drive is in the constant pressure status and the feedback change value
is less than 0.12kg within 0.5 seconds. The AC motor drive won’t run until the feedback value is decreased
by this proportion to the value less than 3kg.
 Status 2: When the AC motor drive is in constant pressure, it won’t run until the feedback change value is
less than 3.88kg (4-4kgX3%=3.88kg) for a time exceeding 0.5 seconds.
10
.
27
|
10.33
Reserved
10.35
Multi-pump control mode
Settings 0~2
0: Disable
1: Fixed time circulation (alternative operation)
2: Fixed quantity control( multi-pump operating at
constant pressure.)
Factory Setting: 0
 When using multi-pump control mode, the setting of Pr10.35 of each pump has to be the same.
10.36
Multi-pump ID
Settings 0~4
0: Multi-pump control mode is disabled
1: Master
2~4: Slave
Factory Setting: 0
 When using multi-pump control mode, the setting of Pr10.36 of each pump has to be the same.
10.37
Multi-pump’s fixed time circulation period
Settings 1~ 65535 minutes Factory Setting: 60
 Fixed time circulation mode (alternative operation). For example, when pump 01’s operating time is longer
than the setting at Pr10.37, pump 01 will be stopped then pump02 will be activated, so on and so forth.
 Fixed quantity control (multi-pump runs at constant pressure). For example, when master pump’s operating
time is longer than the setting at Pr10.37, master pump switches to the slave pump.
 This parameter only applies on the master pump.
10.38
Frequency to start switching pumps
Settings 0.00Hz~ FMAX Factory Setting: 60.00
10.39
Time detected when pump reaches the starting frequency
Settings 0.0~ 3600.0 sec Factory Setting: 1.0
10.40
Frequency to stop switching pumps
Settings 0.00Hz ~ FMAX Factory Setting: 48.00

Delta Electronics VFD-EL series Specifications

General

Brand	Delta Electronics
Model	VFD-EL series
Category	Media Converter
Language	English