
GENER
AL INFORMA
TION
PR
ODUC
T INFORMA
TION
SY
STEM DESIGN
INTEGR
ATION INT
O SY
STEM
ORDERING INFORMA
TION
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
7.5s
0
3000
6000
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 3-82
60s
15s
Time (s)
Drive parameter
Description
Default value
(s)
1-71
Start delay
keep running @ 3000 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 15s
90
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 5s
30
SY
STEM DESIGN
37
AB237586440343en-000601