Danfoss VLT HVAC Basic Drive FC 101 - Page 44

3-16 Reference 2 Source
Option: Function:
The sum of these reference signals denes
the actual reference. See also
parameter 1-93 Thermistor Source.
[0] No function
[1] Analog Input
53
[2] * Analog Input
54
[7] Pulse input 29
[11] Local bus
reference
3-17 Reference 3 Source
Option: Function:
Select the reference input to be used for
the 3
rd
reference signal.
Parameter 3-15 Reference 1 Source,
parameter 3-16 Reference 2 Source, and
parameter 3-17 Reference 3 Source dene
up to 3 dierent reference signals. The
sum of these reference signals denes the
actual reference.
[0] No function
[1] Analog Input
53
[2] Analog Input
54
[7] Pulse input 29
[11] * Local bus
reference
3.4.3 3-4* Ramp 1
Congure the ramp time parameters for each of the 2
ramps (parameter group 3-4* Ramp 1 and parameter group
3-5* Ramp 2). The ramp time is preset to the minimum
value of 10 ms for all power sizes.
t
acc
t
dec
130BB801.10
P 3-*2
Ramp (X)
Down
Time (Dec)
P 4-14
High-limit
RPM
Reference
P 1-23
Motor
frequency
P 4-12
Low limit
Time
P 3-*1
Ramp (X)Up
Time (Acc)
Illustration 3.6 Ramps
3-41 Ramp 1 Ramp Up Time
Range: Function:
Size
related*
[0.05 -
3600 s]
Enter acceleration time from 0 Hz to
parameter 1-23 Motor Frequency if
asynchronous motor is selected. Enter
acceleration time from 0 RPM, to
parameter 1-25 Motor Nominal Speed if PM
motor is selected. Select a ramp-up time
such that the output current does not
exceed the current limit in
parameter 4-18 Current Limit during ramping.
See ramp-down time in
parameter 3-42 Ramp 1 Ramp Down Time.
3-42 Ramp 1 Ramp Down Time
Range: Function:
Size
related*
[0.05 -
3600 s]
If asynchronous motor is selected, enter
deceleration time from
parameter 1-23 Motor Frequency to 0 Hz. If
PM motor is selected, enter deceleration
time from parameter 1-25 Motor Nominal
Speed to 0 RPM. Select a ramp-down time
to avoid tripping on overvoltage in the
DC-link.
3.4.4 3-5* Ramp 2
This parameter group congures ramp 2 parameters.
Parameters
VLT
®
HVAC Basic Drive FC 101
42 Danfoss A/S © 04/2018 All rights reserved. MG18B502
33