Danfoss VZH052 Manual page 37

Manage speed limit
Speed limit requirement
Start/Stop/Ramp setting
6000
Start delay 1-71
3000
Start ramp up 3-82
0
7.5s
Drive parameter
1-71 Start delay
It is used to define speed ramp up slope. Speed ramp up slope is defined under condition that increases
Ramp 1 ramp
3-41
up time
It is used to define speed ramp down slope. Speed ramp down slope is defined under condition that
Ramp 1 ramp
3-42
down time
Speed limit guarantees compressor
R
reliability and must be respected. In drive control
logic, default setting values have been qualified
Ramp 1 ramp up time 3-41
60s
keep running @ 3000 RPM within a certain duration
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 15s
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 5s
by Danfoss. Customer could change the default
values if the changes have been qualified by
OEM.
Description
Ramp 1 ramp down time 3-42
To Stop 3-82
15s Time (s)
Default value
(s)
60
90
30
AB237586440343en-000601
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