3-42 Ramp 1 Ramp-down Time
Range:
Function:
Size re-
lated
[0.01 - 3600.00 s]
Enter the ramp-down time, i.e., the deceleration time from the
rated motor speed n
M,N
(par. 1-25) to 0 RPM. Choose a ramp-
down time so that no overvoltage arises in the inverter due to
regenerative operation of the motor, and so that the generated
current does not exceed the current limit set in par. 4-18. The
value 0.00 corresponds to 0.01 s in speed mode. See ramp-up
time in par. 3-41.
Par
. 3
−
42 =
t
acc
s x n
M, N
(
par
. 1
−
25)
RPM
Δ
ref RPM
4.3. Parameter Lists
Changes during operation
”TRUE” means that the parameter can be changed while the adjustable frequency drive is in
operation, and “FALSE” means that it must be stopped before a change can be made.
4-Set-up
'All set-up': the parameters can be set individually in each of the four set-ups, i.e., one single
parameter can have four different data values.
'1 set-up': the data value will be the same in all set-ups.
Conversion index
This number refers to a conversion figure used when writing or reading to and from the adjustable
frequency drive.
Conv. index
100
67
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
Conv. factor
1
1/60 100000
0
100000 10000 1000
100
10
1
0.1
0.01
0.00
1
0.000
1
0.0000
1
0.000001
Data type
Description
Type
2
Integer 8
Int8
3
Integer 16
Int16
4
Integer 32
Int32
5
Unsigned 8
Uint8
6
Unsigned 16
Uint16
7
Unsigned 32
Uint32
9
Visible String
VisStr
33
Normalized value 2 bytes
N2
35
Bit sequence of 16 Boolean variables
V2
54
Time difference w/o date
TimD
See the adjustable frequency drive
Design Guide
for further information about data types 33, 35
and 54.
Parameters for the adjustable frequency drive are grouped into various parameter groups for easy
selection of the correct parameters for optimized operation of the adjustable frequency drive.
0-xx Operation and display parameters for basic adjustable frequency drive settings
1-xx Load and motor parameters, includes all load and motor-related parameters
VLT
®
Automation Drive FC 300
Instruction Manual High Power
4. How to Program
MG.33.U1.22 - VLT
®
is a registered Danfoss trademark.
83
4
