Parameters: 14-** Special Functions - Danfoss VLT CDS302 Operating Instructions Manual

Parameter Descriptions

6.11 Parameters: 14-** Special Functions

6.11.1 14-** Special Functions
Parameter group for configuring special frequency
converter functions.
6.11.2 14-0* Inverter Switching
Parameters for configuring the inverter switching.
14-03 Overmodulation
Option: Function:
[0] Off 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/Off
Parameters for configuring mains failure monitoring and
handling.
14-12 Function at Mains Imbalance
Option: Function:
Operation under severe main imbalance
conditions reduces the lifetime of the motor.
Conditions are considered severe if the motor is
operated continuously near nominal load.
[0] Trip Trips the frequency converter
[1] Warning Issues a warning
*
[2] Disabled No action
6.11.4 14-2* Trip Reset
Parameters for configuring 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 Performs between one and twenty
*
x 10 automatic resets after tripping.
MG34M302 - VLT
®
Operating Instructions VLT CDS302 and CDS303
NOTE
If the specified 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 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:
30 s
*
14-22 Operation Mode
Option:
[0] Normal
operation
*
[1] Control
card test
®
is a registered Danfoss trademark/Commercial Compressor
Function:
[0 - 600 s] Enter the time interval from trip to start of
the automatic reset function. This parameter
is active when 14-20 Reset Mode is set to
Automatic reset.
Function:
Use this parameter to specify normal operation;
to perform tests; or to initialise all parameters
except 15-03 Power Up's, 15-04 Over Temp's and
15-05 Over Volt's. This function is active only
when the power is cycled to the frequency
converter.
Normal operation of the frequency converter
with the motor in the selected application.
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.
3. Set switches S201 (A53) and S202
(A54) = ON./I.
4. Insert the test plug (see below).
5. Connect to mains supply.
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