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
x 10
Performs between one and twenty
automatic resets after tripping.
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:
Function:
30 s
*
[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.
14-22 Operation Mode
Option:
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.
[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.
3.
Set switches S201 (A53) and S202
(A54) = ON./I.
4.
Insert the test plug (see below).
5.
Connect to mains supply.
Parameter Descriptions
Operating Instructions VLT
®
CDS302 and CDS303
MG34M302 - VLT
®
is a registered Danfoss trademark/Commercial Compressor
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