3-18 Relative Scaling Reference Resource
Option: Function:
[1] Analog input
53
[2] Analog input
54
[7] Frequency
input 29
[8] Frequency
input 33
[11] Local bus
reference
[20] Digital
pot.meter
[21] Analog input
X30-11
[22] Analog input
X30-12
[29] Analog Input
X48/2
NOTE!
This parameter cannot be adjusted while the motor is
running.
3-19 Jog Speed [RPM]
Range: Function:
Application
dependent*
[Application
dependant]
Enter a value for the jog speed
n
JOG
, which is a fixed output
speed. The Adjustable frequency
drive runs at this speed when
the jog function is activated. The
maximum limit is defined in
4-13 Motor Speed High Limit
[RPM].
See also 3-80 Jog Ramp Time.
3.5.3 Ramps
3-4* Ramp 1
For each of four ramps (parameter groups 3-4*, 3-5*, 3-6*
and 3-7*), configure the ramp parameters: ramp type,
ramping times (duration of acceleration and deceleration)
and level of jerk compensation for S ramps.
Start by setting the linear ramping times corresponding to
the figures.
P 3-*2
Ramp (X) Down
Time (Dec)
P 4-13
High-limit
RPM
Reference
n
s
P 4-11
Low limit
t
dec
Time
P 3-*1
Ramp (X)Up
Time (Acc)
t
acc
130BA872.10
If S-ramps are selected, then set the level of non-linear jerk
compensation required. Set jerk compensation by defining
the proportion of ramp-up and ramp-down times where
acceleration and deceleration are variable (i.e., increasing
or decreasing). The S-ramp acceleration and deceleration
settings are defined as a percentage of the actual ramp
time.
3-40 Ramp 1 Type
Option: Function:
Select the ramp type, depending on
requirements for acceleration/deceleration.
A linear ramp will give constant acceleration
during ramping. An S-ramp will give non-
linear acceleration, compensating for jerk in
the application.
[0] * Linear
[1] S-ramp
Const Jerk
Acceleration with lowest possible jerk.
[2] S-ramp
Const Time
S-ramp based on the values set in 3-41 Ramp
1 Ramp up Time and 3-42 Ramp 1 Ramp Down
Time.
Parameter Descriptions FC 300 Programming Guide
MG33MD22 - VLT
®
is a registered Danfoss trademark 3-37
3
3
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