Danfoss VLT CDS302 Operating Instructions Manual page 54

Parameter Descriptions
3-15 Reference Resource 1
Option:
[1] Analog input 53
*
[2] Analog input 54
[7] Frequency input 29
[8] Frequency input 33
[11] Local bus reference
[20] Digital pot.meter
NOTE
This parameter cannot be adjusted while the motor is
running.
3-16 Reference Resource 2
6 6
Option:
[0] No function
*
NOTE
This parameter cannot be adjusted while the motor is
running.
3-17 Reference Resource 3
Option:
[0] No function
*
NOTE
This parameter cannot be adjusted while the motor is
running.
3-18 Relative Scaling Reference Resource
Option:
[0] No function
*
54
Operating Instructions VLT
Function:
Function:
Select the reference input to be used for the
second reference signal. Parameters
3-15 Reference Resource 1, 3-16 Reference
Resource 2 and 3-17 Reference Resource 3
define up to three different reference signals.
The sum of these reference signals defines the
actual reference.
Same options as 3-15 Reference Resource 1.
Function:
Select the reference input to be used for the
third reference signal. 3-15 Reference Resource
1, 3-16 Reference Resource 2 and 3-17 Reference
Resource 3 define up to three different
reference signals. The sum of these reference
signals defines the actual reference.
Same options as 3-15 Reference Resource 1.
Function:
Select a variable value to be added to the
fixed value (defined in 3-14 Preset Relative
Reference). The sum of the fixed and variable
values is multiplied with the actual reference.
This product is then added to the actual
reference (X+X*Y/100) to give the resultant
actual reference
Same options as 3-15 Reference Resource 1.
®
MG34M302 - VLT is a registered Danfoss trademark/Commercial Compressor
®
CDS302 and CDS303
3-19 Jog Speed [RPM]
Range: Function:
Size [ 0 - par. Enter a value for the jog speed n
related 4-13 RPM] 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.
3-40 Ramp 1 Type
Option: Function:
Select the ramp type, depending on requirements
for acceleration/deceleration. A linear ramp will give
constant acceleration during ramping.
[0] Linear
*
3-41 Ramp Up Time Running (sec)
Range:
5 s min. [Comp dependent] Enter the ramp-up time, i.e. the
*
3-42 Ramp Down Time Running (sec)
Range:
5 s min. [Comp dependent] Enter the ramp-down time, i.e.
*
3-50 Ramp 2 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 Acceleration with lowest possible jerk
Const Jerk
[2] S-ramp S-ramp based on the values set in 3-51 Ramp
Const Time 2 Ramp up Time and 3-52 Ramp 2 Ramp down
Time
NOTE
If [1] S-ramp Const Jerk 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.
,
JOG
Function:
acceleration time to reach the
system required motor speed.
Function:
the deceleration time to reach
compressor minimum motor
speed.