Danfoss VLT series, Programming Manual

Page: 55 / 241

3-17 Reference 3 Source
Option: Function:
Select the reference input to be used
for the third reference signal.
3-15 Reference 1 Source , 3-16 Reference
2 Source and 3-17 Reference 3 Source
define up to three different reference
signals. The sum of these reference
signals defines the actual reference.
This parameter cannot be adjusted
while the motor is running.
[0]
*
No function
[1] Analog input 53
[2] Analog input 54
[7] Pulse input 29
[8] Pulse input 33
[20] Digital pot.meter
[21] Analog input X30/11
[22] Analog input X30/12
[23] Analog Input X42/1
[24] Analog Input X42/3
[25] Analog Input X42/5
[29] Analog Input X48/2
[30] Ext. Closed Loop 1
[31] Ext. Closed Loop 2
[32] Ext. Closed Loop 3
3-19 Jog Speed [RPM]
Range: Function:
Size
related
*
[ 0 - par.
4-13 RPM] Enter a value for the jog speed n
JOG
,
which is a fixed output speed. The
frequency converter 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 3-4* Ramp 1
Configure the ramp parameter, ramping times, for each of
the two ramps (parameter group 3-4* and parameter
group 3-5*).
t
acc
t
dec
130BA169.11
P 3-*2
Ramp (X)
Down
Time (Dec)
P 4-13
High-limit
RPM
Reference
P 1-25
Motor
speed
P 4-11
Low limit
Time
P 3-*1
Ramp (X)Up
Time (Acc)
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 .
NOTE
If S-ramp [1] is selected and the reference during ramping
is changed the ramp time may be prolonged in order to
realize a jerk free movement which may result in a longer
start or stop time.
Additional adjustment of the S-ramp ratios or switching
initiators may be necessary.
3-41 Ramp 1 Ramp Up Time
Range: Function:
Size
related
*
[ 1.00 -
3600.00 s] Enter the ramp-up time, i.e. the
acceleration time from 0 RPM to
1-25 Motor Nominal Speed . Choose a
ramp-up time such that the output
current does not exceed the current
limit in
4-18 Current Limit during
ramping. See ramp-down time in
3-42 Ramp 1 Ramp Down Time .
Parameter Description
VLT
®
HVAC Drive Programming Guide
54 MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
3 3