Danfoss VLT CDS 303 User Manual

6.11 Par. Group 14 - Special Functions
6.11.1 14-** Special Functions
Parameter group for conguring special frequency
converter functions.
6.11.2 14-0* Inverter Switching
Parameters for conguring the inverter switching.
14-03 Overmodulation
Option: Function:
[0] O Connect the overmodulation function for the output
voltage, to obtain an output voltage up to 15%
greater than the mains voltage.
[1] * On No overmodulation of the output voltage, in order to
avoid torque ripple on the motor shaft. This feature
may be useful for applications such as grinding
machines.
6.11.3 14-1* Mains On/O
Parameters for conguring mains failure monitoring and
handling.
14-12 Function at Line Imbalance
Option: Function:
Operation under severe line imbalance conditions
reduces the lifetime of the motor. Conditions are
considered severe if the motor is operated contin-
uously near nominal load.
[0] Trip Trips the adjustable frequency drive.
[1] * Warning Issues a warning.
[2] Disabled No action
6.11.4 14-2* Trip Reset
Parameters for conguring auto reset handling, special trip
handling and control card self test or initialisation.
14-20 Reset Mode
Option: Function:
Select the reset function after tripping.
Once reset, the frequency converter can
be restarted.
[0] Manual reset Performs a reset via [Reset] or via the
digital inputs.
[10] * Automatic reset
x 10
Performs between one and twenty
automatic resets after tripping.
NOTICE!
If the specied number of AUTOMATIC RESETS is reached
within 10 minutes, the frequency converter enters [0]
Manual reset mode. After the Manual reset is performed,
the setting of parameter 14-20 Reset Mode reverts to the
original selection. If the number of AUTOMATIC RESETS is
not reached within 10 minutes, or when a Manual reset
is performed, the internal AUTOMATIC RESET counter
returns to zero.
CAUTION
The motor may start without warning.
Application Tip:
Since the default setting of the reset mode in the
compressor drive is set up to auto-reset after 30 s this
should be taken in consideration if a relay output is set to
call for a service technician in case of an alarm. By setting
5-40 Function Relay to [9] Alarm and 5-41 On Delay, Relay to
40 s the relay will only activate at either a trip lock alarm
or an alarm, which could not be auto-reset. Only the relay
output can be used for this; the digital outputs do not
have the On Delay feature.
14-21 Automatic Restart Time
Range: Function:
30 s* [0 - 600
s]
Enter the time interval from trip to start of the
automatic reset function. This parameter is
active when parameter 14-20 Reset Mode is set
to Automatic reset.
14-22 Operation Mode
Option: Function:
Use this parameter to specify normal operation;
to perform tests; or to initialize all parameters
except parameter 15-03 Power Up's,
parameter 15-04 Over Temp's and
parameter 15-05 Over Volt's. This function is
active only when the power is cycled to the
frequency converter.
[0]
*
Normal
operation
Normal operation of the frequency converter
with the motor in the selected application.
[1] Control
card test
Tests the analog and digital inputs and outputs
and the +10 V control voltage. The test requires
a test connector with internal connections.
Use the following procedure for the control
card test:
1. Select Control card test [1].
2. Disconnect the mains supply and wait
for the light in the display to go out.
Parameter Descriptions
VLT
®
Compressor Drives CDS 302/CDS 303
102 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
6
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Danfoss VLT CDS 303 Specifications

General

Brand	Danfoss
Model	VLT CDS 303
Category	DC Drives
Language	English