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Danfoss CD302 Instructions Manual page 18

Frequency converter, inverter reciprocating compressors vtz

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Instructions
1-36 ................................... Iron Loss Resistance (Rfe)
1-39 ............................................................. Motor Poles
1-6* Load Depend. Setting
Parameters for adjusting the load-dependent
motor settings.
1-62 ................................................ Slip Compensation
1-66 ................................. Min. Current at Low Speed
1-68 .....................................................Minimum Inertia
1-69 ....................................................Maximum Inertia
1-7* Start Adjustments
Parameters for setting special motor start features.
1-71 ................................................................ Start Delay
1-72 ..........................................................Start Function
1-73 ...................................................Flying Start [RPM]
1-74 .................................................. Start Speed [RPM]
1-75 ...................................................... Start Speed [Hz]
1-76 .............................................................Start Current
1-77 ..........High starting torque Max speed [RPM]
1-8* Stop Adjustments
Parameters for setting special stop features for
the motor.
1-80 ..................................................... Function at Stop
1-81 ....................... Min Speed Stop function [RPM]
1-9* Motor Temperature
1-90 Motor Thermal Protection
Option:
*No protection .......................................................... [0]
Thermistor warning .................................................. [1]
Thermistor trip .......................................................... [2]
ETR warning 1 ............................................................ [3]
The frequency converter determines the motor
temperature for motor protection in two different
ways:
. Via a thermistor sensor connected to one of
the analog or digital inputs (par. 1-93 Thermistor
Source).
. Via calculation (ETR = Electronic Terminal Relay)
of the thermal load, based on the actual load and
time. The calculated thermal load is compared with
the rated motor current IM,N and the rated motor
frequency fM,N. The calculations estimate the need
for a lower load at lower speed due to less cooling
from the fan incorporated in the motor.
1-91 Motor External Fan
Option:
*No .................................................................................. [0]
Yes .................................................................................. [1]
Function:
Select No [0] if no external fan is required, i.e. the
motor is derated at low speed.
Select Yes [1] to apply an external motor fan (ex-
ternal ventilation)
1-93 Thermistor Source
Option:
*None ............................................................................ [0]
Analog input 53 ........................................................ [1]
Analog input 54 ........................................................ [2]
Digital input 18 ......................................................... [3]
Digital input 19 ......................................................... [4]
Digital input 32 ......................................................... [5]
Digital input 33........................................................... [6]
Function:
Select the input to which the thermistor (PTC sen-
sor) should be connected. An analog input option
[1] or [2] cannot be selected if the analog input
is already in use as a reference source (selected
in par. 3-15 Reference Source 1, 3-16 Reference
Source 2 or 3-17 Reference Source 3).
18 | AN000086420674en-000201
This parameter cannot be adjusted while the
motor is running.
Parameters: Reference/Ramps
Parameters for reference handling, definition of
limitations, and configuration of the reaction of
the frequency converter to changes.
3-0* Reference Limits
Parameters for setting the reference unit, limits
and ranges.
3-00 Reference Range
Option:
*Min. - Max ................................................................... [0]
-Max - +Max ................................................................ [1]
Function:
Select the range of the reference signal and the
feedback signal. Signal values can be positive
only, or positive and negative. The minimum
limit may have a negative value, unless Speed
closed loop [1] control is selected in par. 1-00
Configuration Mode.
Select Min. - Max [0] for positive values only.
Select -Max - +Max [1] for both positive and
negative values.
3-01 Reference/Feedback Unit
None ............................................................................... [0]
*bar ...............................................................................[71]
°C ..................................................................................[60]
°F ................................................................................. [160]
psi ............................................................................... [170]
Function:
Select the unit to be used in Process PID Control
references and feedbacks.
3-02 Minimum Reference
Function:
Enter the Minimum Reference. The Minimum
Reference is the lowest value obtainable by sum-
ming all references.
Minimum Reference is active only when par. 3-00
Reference Range is set to Min.- Max. [0].
The Minimum Reference unit matches
- the choice of configuration in par 1-00 Confi-
guration Mode: for Speed closed loop [1].
- the unit selected in par. 3-01 Reference/
Feedback Unit.
3-03 Maximum Reference
Enter the Maximum Reference.
3-10 Preset Reference
Array .............................................................................. [8]
Range:
-100.00 - 100.00 % ........................................... *0.00%
Function:
Must remain 0 for Open Loop Control
The preset reference is stated as a percentage of
the value RefMAX (par. 3-03 Maximum Reference)
or as a percentage of the other external references.
If a RefMIN 0 (Par. 3-02 Minimum Reference) is
programmed, the preset reference is calculated as
a percentage of the full reference range, i.e. on the
basis of the difference between RefMAX and RefMIN.
Afterwards, the value is added to RefMIN. When
using preset references, select Preset ref. bit 0 / 1 / 2
[16], [17] or [18] for the corresponding digital inputs
in parameter group 5.1* Digital Inputs.
3-13 Reference Site
Option:
*Linked to Hand / Auto .......................................... [0]
Remote .......................................................................... [1]
Local ............................................................................... [2]
Function:
Select which reference site to activate.
Select Linked to Hand / Auto [0] to use the local
reference when in Hand mode; or the remote
reference when in Auto mode.
Select Remote [1] to use the remote reference in
both Hand mode and Auto mode.
Select Local [2] to use the local reference in both
Hand mode and Auto mode.
3-14 Preset Relative Reference
Range:
-100.00 - 100.00 % .......................................... * 0.00%
Function:
Define a fixed value (in %) to be added to the
variable value (defined in par. 3-18 Relative Sca-
ling Reference Source). The sum of the fixed and
variable values is multiplied with the actual refe-
rence (labelled X in the illustration below). This
product is then added to the actual reference
(X+X*Y/100) to give the resultant actual refe-
rence.
3-15 Reference Resource 1
Option:
No function .................................................................. [0]
*Analog input 53 ....................................................... [1]
Analog input 54 ......................................................... [2]
Frequency input 29................................................... [7]
Frequency input 33................................................... [8]
Local bus reference .................................................[11]
Digital pot.meter .....................................................[20]
Function:
Select the reference input to be used for the first
reference signal. Par. 3-15, 3-16 and 3-17 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.
3-16 Reference Resource 2
Option: Id. 3-15
*No function ................................................................ [0]
Function:
Select the reference input to be used for the second
reference signal. Par. 3-15, 3-16 and 3-17 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.
3-17 Reference Resource 3
Option: Id. 3-15
*No function ................................................................ [0]
Function:
Select the reference input to be used for the third
reference signal. Par. 3-15, 3-16 and 3-17 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.
3-18 Relative Scaling Reference Resource
Option: Id. 3-15
*No function ............................................................... [0]
Select a variable value to be added to the fixed value
(defined in par. 3-14 Preset Relative Reference). The
sum of the fixed and variable values is multiplied
with the actual reference labelled X in the illustra-
tion below). This product is then added to the actual
reference (X+X*Y/100) to give the resultant actual
reference.
© Danfoss | DCS (CC) | 2019.04

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