Danfoss VLZ065, Application Manuallines

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Manage speed limit
Speed limit requirement
Start/Stop/Ramp setting
Speed limit guarantees compressor
reliability and must be respected. In drive control
logic, default setting values have been qualified
by Danfoss. Customer could change the default values if the
changes have been qualified by OEM.
R
4.5s
0
1800
6600
Sp
eed
(R
PM
)
Start delay 1-71
Start ramp up 3-82
Ramp 1 ramp up time 3-41
Ramp 1 ramp down time 3-42
To Stop 3-83
60s 5.5s Time (s)
Drive parameter Description
Default value
(s)
1-71 Start delay keep running @ 1800 RPM within a certain duration 60
3-41
Ramp 1 ramp
up time
It is used to define speed ramp up slope. Speed ramp up slope is defined under condition that increases
compressor speed from 0 rpm to 6000 rpm in a certain period(s, ramp1 ramp up time)
Eg: if current speed is 3000rpm and desired speed is 4000rpm,
then compressor will reach 4000 rpm in 30s
180
3-42
Ramp 1 ramp
down time
It is used to define speed ramp down slope. Speed ramp down slope is defined under condition that
decreases compressor speed from 6000 rpm to 0rpm in a certain period
(s, ramp1 ramp down time)
Eg: if current speed is 4000rpm and desired speed is 3000rpm,
then compressor will reach 3000 rpm in 30s
180
R
34
AB444226142054en-000101