Danfoss VLT Programming Manual page 51

Parameter Description
3-17 Reference 3 Source
Option:
3 3
[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:
Size related
*
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*).
RPM
P 4-13
High-limit
Reference
P 1-25
Motor
speed
P 4-11
Low limit
50
VLT
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 - par. 4-13 RPM]
P 3-*2
P 3-*1
Ramp (X)
Ramp (X)Up
Down
Time (Acc)
Time (Dec)
t
acc
MG.11.CB.02 - VLT
®
HVAC Drive Programming Guide
3-40 Ramp 1 Type
Option:
[0] Linear
*
[1] S-ramp
Const Jerk
[2] S-ramp
Const 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:
Size related
tacc × nnorm par .1 − 25
par .3 − 41 =
3-42 Ramp 1 Ramp Down Time
Function:
Range:
Size related
tdec × nnorm par .1 − 25
par .3 − 42 =
Time
t
dec
®
is a registered Danfoss trademark
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.
Acceleration with lowest possible jerk.
S-ramp based on the values set in 3-41 Ramp 1
Ramp up Time and 3-42 Ramp 1 Ramp Down
Time.
[1.00 - 3600.00 s]
*
s
ref rpm
[1.00 - 3600.00 s]
*
s
ref rpm
Function:
Function: